[457] | 1 | /*
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| 2 | * ipcp.c - PPP IP Control Protocol.
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| 3 | *
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| 4 | * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
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| 5 | *
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| 6 | * Redistribution and use in source and binary forms, with or without
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| 7 | * modification, are permitted provided that the following conditions
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| 8 | * are met:
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| 9 | *
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| 10 | * 1. Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | *
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer in
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| 15 | * the documentation and/or other materials provided with the
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| 16 | * distribution.
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| 17 | *
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| 18 | * 3. The name "Carnegie Mellon University" must not be used to
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| 19 | * endorse or promote products derived from this software without
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| 20 | * prior written permission. For permission or any legal
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| 21 | * details, please contact
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| 22 | * Office of Technology Transfer
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| 23 | * Carnegie Mellon University
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| 24 | * 5000 Forbes Avenue
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| 25 | * Pittsburgh, PA 15213-3890
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| 26 | * (412) 268-4387, fax: (412) 268-7395
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| 27 | * tech-transfer@andrew.cmu.edu
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| 28 | *
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| 29 | * 4. Redistributions of any form whatsoever must retain the following
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| 30 | * acknowledgment:
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| 31 | * "This product includes software developed by Computing Services
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| 32 | * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
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| 33 | *
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| 34 | * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
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| 35 | * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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| 36 | * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
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| 37 | * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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| 38 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
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| 39 | * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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| 40 | * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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| 41 | */
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| 42 |
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| 43 | #include "netif/ppp/ppp_opts.h"
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| 44 | #if PPP_SUPPORT && PPP_IPV4_SUPPORT /* don't build if not configured for use in lwipopts.h */
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| 45 |
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| 46 | /*
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| 47 | * @todo:
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| 48 | */
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| 49 |
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| 50 | #if 0 /* UNUSED */
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| 51 | #include <stdio.h>
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| 52 | #include <string.h>
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| 53 | #include <stdlib.h>
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| 54 | #include <netdb.h>
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| 55 | #include <sys/param.h>
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| 56 | #include <sys/types.h>
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| 57 | #include <sys/socket.h>
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| 58 | #include <netinet/in.h>
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| 59 | #include <arpa/inet.h>
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| 60 | #endif /* UNUSED */
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| 61 |
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| 62 | #include "netif/ppp/ppp_impl.h"
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| 63 |
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| 64 | #include "netif/ppp/fsm.h"
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| 65 | #include "netif/ppp/ipcp.h"
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| 66 |
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| 67 | #if 0 /* UNUSED */
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| 68 | /* global vars */
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| 69 | u32_t netmask = 0; /* IP netmask to set on interface */
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| 70 | #endif /* UNUSED */
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| 71 |
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| 72 | #if 0 /* UNUSED */
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| 73 | bool disable_defaultip = 0; /* Don't use hostname for default IP adrs */
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| 74 | #endif /* UNUSED */
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| 75 |
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| 76 | #if 0 /* moved to ppp_settings */
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| 77 | bool noremoteip = 0; /* Let him have no IP address */
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| 78 | #endif /* moved to ppp_setting */
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| 79 |
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| 80 | #if 0 /* UNUSED */
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| 81 | /* Hook for a plugin to know when IP protocol has come up */
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| 82 | void (*ip_up_hook) (void) = NULL;
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| 83 |
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| 84 | /* Hook for a plugin to know when IP protocol has come down */
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| 85 | void (*ip_down_hook) (void) = NULL;
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| 86 |
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| 87 | /* Hook for a plugin to choose the remote IP address */
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| 88 | void (*ip_choose_hook) (u32_t *) = NULL;
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| 89 | #endif /* UNUSED */
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| 90 |
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| 91 | #if PPP_NOTIFY
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| 92 | /* Notifiers for when IPCP goes up and down */
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| 93 | struct notifier *ip_up_notifier = NULL;
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| 94 | struct notifier *ip_down_notifier = NULL;
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| 95 | #endif /* PPP_NOTIFY */
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| 96 |
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| 97 | /* local vars */
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| 98 | #if 0 /* moved to ppp_pcb */
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| 99 | static int default_route_set[NUM_PPP]; /* Have set up a default route */
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| 100 | static int proxy_arp_set[NUM_PPP]; /* Have created proxy arp entry */
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| 101 | static int ipcp_is_up; /* have called np_up() */
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| 102 | static int ipcp_is_open; /* haven't called np_finished() */
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| 103 | static bool ask_for_local; /* request our address from peer */
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| 104 | #endif /* moved to ppp_pcb */
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| 105 | #if 0 /* UNUSED */
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| 106 | static char vj_value[8]; /* string form of vj option value */
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| 107 | static char netmask_str[20]; /* string form of netmask value */
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| 108 | #endif /* UNUSED */
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| 109 |
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| 110 | /*
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| 111 | * Callbacks for fsm code. (CI = Configuration Information)
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| 112 | */
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| 113 | static void ipcp_resetci(fsm *f); /* Reset our CI */
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| 114 | static int ipcp_cilen(fsm *f); /* Return length of our CI */
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| 115 | static void ipcp_addci(fsm *f, u_char *ucp, int *lenp); /* Add our CI */
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| 116 | static int ipcp_ackci(fsm *f, u_char *p, int len); /* Peer ack'd our CI */
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| 117 | static int ipcp_nakci(fsm *f, u_char *p, int len, int treat_as_reject);/* Peer nak'd our CI */
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| 118 | static int ipcp_rejci(fsm *f, u_char *p, int len); /* Peer rej'd our CI */
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| 119 | static int ipcp_reqci(fsm *f, u_char *inp, int *len, int reject_if_disagree); /* Rcv CI */
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| 120 | static void ipcp_up(fsm *f); /* We're UP */
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| 121 | static void ipcp_down(fsm *f); /* We're DOWN */
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| 122 | static void ipcp_finished(fsm *f); /* Don't need lower layer */
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| 123 |
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| 124 | static const fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
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| 125 | ipcp_resetci, /* Reset our Configuration Information */
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| 126 | ipcp_cilen, /* Length of our Configuration Information */
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| 127 | ipcp_addci, /* Add our Configuration Information */
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| 128 | ipcp_ackci, /* ACK our Configuration Information */
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| 129 | ipcp_nakci, /* NAK our Configuration Information */
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| 130 | ipcp_rejci, /* Reject our Configuration Information */
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| 131 | ipcp_reqci, /* Request peer's Configuration Information */
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| 132 | ipcp_up, /* Called when fsm reaches OPENED state */
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| 133 | ipcp_down, /* Called when fsm leaves OPENED state */
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| 134 | NULL, /* Called when we want the lower layer up */
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| 135 | ipcp_finished, /* Called when we want the lower layer down */
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| 136 | NULL, /* Called when Protocol-Reject received */
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| 137 | NULL, /* Retransmission is necessary */
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| 138 | NULL, /* Called to handle protocol-specific codes */
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| 139 | "IPCP" /* String name of protocol */
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| 140 | };
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| 141 |
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| 142 | /*
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| 143 | * Command-line options.
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| 144 | */
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| 145 | #if PPP_OPTIONS
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| 146 | static int setvjslots (char **);
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| 147 | static int setdnsaddr (char **);
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| 148 | static int setwinsaddr (char **);
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| 149 | static int setnetmask (char **);
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| 150 | int setipaddr (char *, char **, int);
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| 151 |
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| 152 | static void printipaddr (option_t *, void (*)(void *, char *,...),void *);
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| 153 |
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| 154 | static option_t ipcp_option_list[] = {
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| 155 | { "noip", o_bool, &ipcp_protent.enabled_flag,
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| 156 | "Disable IP and IPCP" },
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| 157 | { "-ip", o_bool, &ipcp_protent.enabled_flag,
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| 158 | "Disable IP and IPCP", OPT_ALIAS },
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| 159 |
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| 160 | { "novj", o_bool, &ipcp_wantoptions[0].neg_vj,
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| 161 | "Disable VJ compression", OPT_A2CLR, &ipcp_allowoptions[0].neg_vj },
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| 162 | { "-vj", o_bool, &ipcp_wantoptions[0].neg_vj,
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| 163 | "Disable VJ compression", OPT_ALIAS | OPT_A2CLR,
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| 164 | &ipcp_allowoptions[0].neg_vj },
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| 165 |
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| 166 | { "novjccomp", o_bool, &ipcp_wantoptions[0].cflag,
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| 167 | "Disable VJ connection-ID compression", OPT_A2CLR,
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| 168 | &ipcp_allowoptions[0].cflag },
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| 169 | { "-vjccomp", o_bool, &ipcp_wantoptions[0].cflag,
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| 170 | "Disable VJ connection-ID compression", OPT_ALIAS | OPT_A2CLR,
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| 171 | &ipcp_allowoptions[0].cflag },
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| 172 |
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| 173 | { "vj-max-slots", o_special, (void *)setvjslots,
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| 174 | "Set maximum VJ header slots",
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| 175 | OPT_PRIO | OPT_A2STRVAL | OPT_STATIC, vj_value },
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| 176 |
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| 177 | { "ipcp-accept-local", o_bool, &ipcp_wantoptions[0].accept_local,
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| 178 | "Accept peer's address for us", 1 },
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| 179 | { "ipcp-accept-remote", o_bool, &ipcp_wantoptions[0].accept_remote,
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| 180 | "Accept peer's address for it", 1 },
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| 181 |
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| 182 | { "ipparam", o_string, &ipparam,
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| 183 | "Set ip script parameter", OPT_PRIO },
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| 184 |
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| 185 | { "noipdefault", o_bool, &disable_defaultip,
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| 186 | "Don't use name for default IP adrs", 1 },
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| 187 |
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| 188 | { "ms-dns", 1, (void *)setdnsaddr,
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| 189 | "DNS address for the peer's use" },
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| 190 | { "ms-wins", 1, (void *)setwinsaddr,
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| 191 | "Nameserver for SMB over TCP/IP for peer" },
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| 192 |
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| 193 | { "ipcp-restart", o_int, &ipcp_fsm[0].timeouttime,
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| 194 | "Set timeout for IPCP", OPT_PRIO },
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| 195 | { "ipcp-max-terminate", o_int, &ipcp_fsm[0].maxtermtransmits,
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| 196 | "Set max #xmits for term-reqs", OPT_PRIO },
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| 197 | { "ipcp-max-configure", o_int, &ipcp_fsm[0].maxconfreqtransmits,
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| 198 | "Set max #xmits for conf-reqs", OPT_PRIO },
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| 199 | { "ipcp-max-failure", o_int, &ipcp_fsm[0].maxnakloops,
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| 200 | "Set max #conf-naks for IPCP", OPT_PRIO },
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| 201 |
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| 202 | { "defaultroute", o_bool, &ipcp_wantoptions[0].default_route,
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| 203 | "Add default route", OPT_ENABLE|1, &ipcp_allowoptions[0].default_route },
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| 204 | { "nodefaultroute", o_bool, &ipcp_allowoptions[0].default_route,
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| 205 | "disable defaultroute option", OPT_A2CLR,
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| 206 | &ipcp_wantoptions[0].default_route },
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| 207 | { "-defaultroute", o_bool, &ipcp_allowoptions[0].default_route,
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| 208 | "disable defaultroute option", OPT_ALIAS | OPT_A2CLR,
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| 209 | &ipcp_wantoptions[0].default_route },
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| 210 |
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| 211 | { "replacedefaultroute", o_bool,
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| 212 | &ipcp_wantoptions[0].replace_default_route,
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| 213 | "Replace default route", 1
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| 214 | },
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| 215 | { "noreplacedefaultroute", o_bool,
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| 216 | &ipcp_allowoptions[0].replace_default_route,
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| 217 | "Never replace default route", OPT_A2COPY,
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| 218 | &ipcp_wantoptions[0].replace_default_route },
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| 219 | { "proxyarp", o_bool, &ipcp_wantoptions[0].proxy_arp,
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| 220 | "Add proxy ARP entry", OPT_ENABLE|1, &ipcp_allowoptions[0].proxy_arp },
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| 221 | { "noproxyarp", o_bool, &ipcp_allowoptions[0].proxy_arp,
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| 222 | "disable proxyarp option", OPT_A2CLR,
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| 223 | &ipcp_wantoptions[0].proxy_arp },
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| 224 | { "-proxyarp", o_bool, &ipcp_allowoptions[0].proxy_arp,
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| 225 | "disable proxyarp option", OPT_ALIAS | OPT_A2CLR,
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| 226 | &ipcp_wantoptions[0].proxy_arp },
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| 227 |
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| 228 | { "usepeerdns", o_bool, &usepeerdns,
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| 229 | "Ask peer for DNS address(es)", 1 },
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| 230 |
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| 231 | { "netmask", o_special, (void *)setnetmask,
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| 232 | "set netmask", OPT_PRIO | OPT_A2STRVAL | OPT_STATIC, netmask_str },
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| 233 |
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| 234 | { "ipcp-no-addresses", o_bool, &ipcp_wantoptions[0].old_addrs,
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| 235 | "Disable old-style IP-Addresses usage", OPT_A2CLR,
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| 236 | &ipcp_allowoptions[0].old_addrs },
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| 237 | { "ipcp-no-address", o_bool, &ipcp_wantoptions[0].neg_addr,
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| 238 | "Disable IP-Address usage", OPT_A2CLR,
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| 239 | &ipcp_allowoptions[0].neg_addr },
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| 240 |
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| 241 | { "noremoteip", o_bool, &noremoteip,
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| 242 | "Allow peer to have no IP address", 1 },
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| 243 |
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| 244 | { "nosendip", o_bool, &ipcp_wantoptions[0].neg_addr,
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| 245 | "Don't send our IP address to peer", OPT_A2CLR,
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| 246 | &ipcp_wantoptions[0].old_addrs},
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| 247 |
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| 248 | { "IP addresses", o_wild, (void *) &setipaddr,
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| 249 | "set local and remote IP addresses",
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| 250 | OPT_NOARG | OPT_A2PRINTER, (void *) &printipaddr },
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| 251 |
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| 252 | { NULL }
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| 253 | };
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| 254 | #endif /* PPP_OPTIONS */
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| 255 |
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| 256 | /*
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| 257 | * Protocol entry points from main code.
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| 258 | */
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| 259 | static void ipcp_init(ppp_pcb *pcb);
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| 260 | static void ipcp_open(ppp_pcb *pcb);
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| 261 | static void ipcp_close(ppp_pcb *pcb, const char *reason);
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| 262 | static void ipcp_lowerup(ppp_pcb *pcb);
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| 263 | static void ipcp_lowerdown(ppp_pcb *pcb);
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| 264 | static void ipcp_input(ppp_pcb *pcb, u_char *p, int len);
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| 265 | static void ipcp_protrej(ppp_pcb *pcb);
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| 266 | #if PRINTPKT_SUPPORT
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| 267 | static int ipcp_printpkt(const u_char *p, int plen,
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| 268 | void (*printer) (void *, const char *, ...), void *arg);
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| 269 | #endif /* PRINTPKT_SUPPORT */
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| 270 | #if PPP_OPTIONS
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| 271 | static void ip_check_options (void);
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| 272 | #endif /* PPP_OPTIONS */
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| 273 | #if DEMAND_SUPPORT
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| 274 | static int ip_demand_conf (int);
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| 275 | static int ip_active_pkt (u_char *, int);
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| 276 | #endif /* DEMAND_SUPPORT */
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| 277 | #if 0 /* UNUSED */
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| 278 | static void create_resolv (u32_t, u32_t);
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| 279 | #endif /* UNUSED */
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| 280 |
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| 281 | const struct protent ipcp_protent = {
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| 282 | PPP_IPCP,
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| 283 | ipcp_init,
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| 284 | ipcp_input,
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| 285 | ipcp_protrej,
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| 286 | ipcp_lowerup,
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| 287 | ipcp_lowerdown,
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| 288 | ipcp_open,
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| 289 | ipcp_close,
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| 290 | #if PRINTPKT_SUPPORT
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| 291 | ipcp_printpkt,
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| 292 | #endif /* PRINTPKT_SUPPORT */
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| 293 | #if PPP_DATAINPUT
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| 294 | NULL,
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| 295 | #endif /* PPP_DATAINPUT */
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| 296 | #if PRINTPKT_SUPPORT
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| 297 | "IPCP",
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| 298 | "IP",
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| 299 | #endif /* PRINTPKT_SUPPORT */
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| 300 | #if PPP_OPTIONS
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| 301 | ipcp_option_list,
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| 302 | ip_check_options,
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| 303 | #endif /* PPP_OPTIONS */
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| 304 | #if DEMAND_SUPPORT
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| 305 | ip_demand_conf,
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| 306 | ip_active_pkt
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| 307 | #endif /* DEMAND_SUPPORT */
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| 308 | };
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| 309 |
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| 310 | static void ipcp_clear_addrs(ppp_pcb *pcb, u32_t ouraddr, u32_t hisaddr, u8_t replacedefaultroute);
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| 311 |
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| 312 | /*
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| 313 | * Lengths of configuration options.
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| 314 | */
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| 315 | #define CILEN_VOID 2
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| 316 | #define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
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| 317 | #define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
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| 318 | #define CILEN_ADDR 6 /* new-style single address option */
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| 319 | #define CILEN_ADDRS 10 /* old-style dual address option */
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| 320 |
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| 321 |
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| 322 | #define CODENAME(x) ((x) == CONFACK ? "ACK" : \
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| 323 | (x) == CONFNAK ? "NAK" : "REJ")
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| 324 |
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| 325 | #if 0 /* UNUSED, already defined by lwIP */
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| 326 | /*
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| 327 | * Make a string representation of a network IP address.
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| 328 | */
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| 329 | char *
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| 330 | ip_ntoa(ipaddr)
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| 331 | u32_t ipaddr;
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| 332 | {
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| 333 | static char b[64];
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| 334 |
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| 335 | slprintf(b, sizeof(b), "%I", ipaddr);
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| 336 | return b;
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| 337 | }
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| 338 | #endif /* UNUSED, already defined by lwIP */
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| 339 |
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| 340 | /*
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| 341 | * Option parsing.
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| 342 | */
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| 343 | #if PPP_OPTIONS
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| 344 | /*
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| 345 | * setvjslots - set maximum number of connection slots for VJ compression
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| 346 | */
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| 347 | static int
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| 348 | setvjslots(argv)
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| 349 | char **argv;
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| 350 | {
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| 351 | int value;
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| 352 |
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| 353 | if (!int_option(*argv, &value))
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| 354 | return 0;
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| 355 |
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| 356 | if (value < 2 || value > 16) {
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| 357 | option_error("vj-max-slots value must be between 2 and 16");
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| 358 | return 0;
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| 359 | }
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| 360 | ipcp_wantoptions [0].maxslotindex =
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| 361 | ipcp_allowoptions[0].maxslotindex = value - 1;
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| 362 | slprintf(vj_value, sizeof(vj_value), "%d", value);
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| 363 | return 1;
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| 364 | }
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| 365 |
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| 366 | /*
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| 367 | * setdnsaddr - set the dns address(es)
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| 368 | */
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| 369 | static int
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| 370 | setdnsaddr(argv)
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| 371 | char **argv;
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| 372 | {
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| 373 | u32_t dns;
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| 374 | struct hostent *hp;
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| 375 |
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| 376 | dns = inet_addr(*argv);
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| 377 | if (dns == (u32_t) -1) {
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| 378 | if ((hp = gethostbyname(*argv)) == NULL) {
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| 379 | option_error("invalid address parameter '%s' for ms-dns option",
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| 380 | *argv);
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| 381 | return 0;
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| 382 | }
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| 383 | dns = *(u32_t *)hp->h_addr;
|
---|
| 384 | }
|
---|
| 385 |
|
---|
| 386 | /* We take the last 2 values given, the 2nd-last as the primary
|
---|
| 387 | and the last as the secondary. If only one is given it
|
---|
| 388 | becomes both primary and secondary. */
|
---|
| 389 | if (ipcp_allowoptions[0].dnsaddr[1] == 0)
|
---|
| 390 | ipcp_allowoptions[0].dnsaddr[0] = dns;
|
---|
| 391 | else
|
---|
| 392 | ipcp_allowoptions[0].dnsaddr[0] = ipcp_allowoptions[0].dnsaddr[1];
|
---|
| 393 |
|
---|
| 394 | /* always set the secondary address value. */
|
---|
| 395 | ipcp_allowoptions[0].dnsaddr[1] = dns;
|
---|
| 396 |
|
---|
| 397 | return (1);
|
---|
| 398 | }
|
---|
| 399 |
|
---|
| 400 | /*
|
---|
| 401 | * setwinsaddr - set the wins address(es)
|
---|
| 402 | * This is primrarly used with the Samba package under UNIX or for pointing
|
---|
| 403 | * the caller to the existing WINS server on a Windows NT platform.
|
---|
| 404 | */
|
---|
| 405 | static int
|
---|
| 406 | setwinsaddr(argv)
|
---|
| 407 | char **argv;
|
---|
| 408 | {
|
---|
| 409 | u32_t wins;
|
---|
| 410 | struct hostent *hp;
|
---|
| 411 |
|
---|
| 412 | wins = inet_addr(*argv);
|
---|
| 413 | if (wins == (u32_t) -1) {
|
---|
| 414 | if ((hp = gethostbyname(*argv)) == NULL) {
|
---|
| 415 | option_error("invalid address parameter '%s' for ms-wins option",
|
---|
| 416 | *argv);
|
---|
| 417 | return 0;
|
---|
| 418 | }
|
---|
| 419 | wins = *(u32_t *)hp->h_addr;
|
---|
| 420 | }
|
---|
| 421 |
|
---|
| 422 | /* We take the last 2 values given, the 2nd-last as the primary
|
---|
| 423 | and the last as the secondary. If only one is given it
|
---|
| 424 | becomes both primary and secondary. */
|
---|
| 425 | if (ipcp_allowoptions[0].winsaddr[1] == 0)
|
---|
| 426 | ipcp_allowoptions[0].winsaddr[0] = wins;
|
---|
| 427 | else
|
---|
| 428 | ipcp_allowoptions[0].winsaddr[0] = ipcp_allowoptions[0].winsaddr[1];
|
---|
| 429 |
|
---|
| 430 | /* always set the secondary address value. */
|
---|
| 431 | ipcp_allowoptions[0].winsaddr[1] = wins;
|
---|
| 432 |
|
---|
| 433 | return (1);
|
---|
| 434 | }
|
---|
| 435 |
|
---|
| 436 | /*
|
---|
| 437 | * setipaddr - Set the IP address
|
---|
| 438 | * If doit is 0, the call is to check whether this option is
|
---|
| 439 | * potentially an IP address specification.
|
---|
| 440 | * Not static so that plugins can call it to set the addresses
|
---|
| 441 | */
|
---|
| 442 | int
|
---|
| 443 | setipaddr(arg, argv, doit)
|
---|
| 444 | char *arg;
|
---|
| 445 | char **argv;
|
---|
| 446 | int doit;
|
---|
| 447 | {
|
---|
| 448 | struct hostent *hp;
|
---|
| 449 | char *colon;
|
---|
| 450 | u32_t local, remote;
|
---|
| 451 | ipcp_options *wo = &ipcp_wantoptions[0];
|
---|
| 452 | static int prio_local = 0, prio_remote = 0;
|
---|
| 453 |
|
---|
| 454 | /*
|
---|
| 455 | * IP address pair separated by ":".
|
---|
| 456 | */
|
---|
| 457 | if ((colon = strchr(arg, ':')) == NULL)
|
---|
| 458 | return 0;
|
---|
| 459 | if (!doit)
|
---|
| 460 | return 1;
|
---|
| 461 |
|
---|
| 462 | /*
|
---|
| 463 | * If colon first character, then no local addr.
|
---|
| 464 | */
|
---|
| 465 | if (colon != arg && option_priority >= prio_local) {
|
---|
| 466 | *colon = '\0';
|
---|
| 467 | if ((local = inet_addr(arg)) == (u32_t) -1) {
|
---|
| 468 | if ((hp = gethostbyname(arg)) == NULL) {
|
---|
| 469 | option_error("unknown host: %s", arg);
|
---|
| 470 | return 0;
|
---|
| 471 | }
|
---|
| 472 | local = *(u32_t *)hp->h_addr;
|
---|
| 473 | }
|
---|
| 474 | if (bad_ip_adrs(local)) {
|
---|
| 475 | option_error("bad local IP address %s", ip_ntoa(local));
|
---|
| 476 | return 0;
|
---|
| 477 | }
|
---|
| 478 | if (local != 0)
|
---|
| 479 | wo->ouraddr = local;
|
---|
| 480 | *colon = ':';
|
---|
| 481 | prio_local = option_priority;
|
---|
| 482 | }
|
---|
| 483 |
|
---|
| 484 | /*
|
---|
| 485 | * If colon last character, then no remote addr.
|
---|
| 486 | */
|
---|
| 487 | if (*++colon != '\0' && option_priority >= prio_remote) {
|
---|
| 488 | if ((remote = inet_addr(colon)) == (u32_t) -1) {
|
---|
| 489 | if ((hp = gethostbyname(colon)) == NULL) {
|
---|
| 490 | option_error("unknown host: %s", colon);
|
---|
| 491 | return 0;
|
---|
| 492 | }
|
---|
| 493 | remote = *(u32_t *)hp->h_addr;
|
---|
| 494 | if (remote_name[0] == 0)
|
---|
| 495 | strlcpy(remote_name, colon, sizeof(remote_name));
|
---|
| 496 | }
|
---|
| 497 | if (bad_ip_adrs(remote)) {
|
---|
| 498 | option_error("bad remote IP address %s", ip_ntoa(remote));
|
---|
| 499 | return 0;
|
---|
| 500 | }
|
---|
| 501 | if (remote != 0)
|
---|
| 502 | wo->hisaddr = remote;
|
---|
| 503 | prio_remote = option_priority;
|
---|
| 504 | }
|
---|
| 505 |
|
---|
| 506 | return 1;
|
---|
| 507 | }
|
---|
| 508 |
|
---|
| 509 | static void
|
---|
| 510 | printipaddr(opt, printer, arg)
|
---|
| 511 | option_t *opt;
|
---|
| 512 | void (*printer) (void *, char *, ...);
|
---|
| 513 | void *arg;
|
---|
| 514 | {
|
---|
| 515 | ipcp_options *wo = &ipcp_wantoptions[0];
|
---|
| 516 |
|
---|
| 517 | if (wo->ouraddr != 0)
|
---|
| 518 | printer(arg, "%I", wo->ouraddr);
|
---|
| 519 | printer(arg, ":");
|
---|
| 520 | if (wo->hisaddr != 0)
|
---|
| 521 | printer(arg, "%I", wo->hisaddr);
|
---|
| 522 | }
|
---|
| 523 |
|
---|
| 524 | /*
|
---|
| 525 | * setnetmask - set the netmask to be used on the interface.
|
---|
| 526 | */
|
---|
| 527 | static int
|
---|
| 528 | setnetmask(argv)
|
---|
| 529 | char **argv;
|
---|
| 530 | {
|
---|
| 531 | u32_t mask;
|
---|
| 532 | int n;
|
---|
| 533 | char *p;
|
---|
| 534 |
|
---|
| 535 | /*
|
---|
| 536 | * Unfortunately, if we use inet_addr, we can't tell whether
|
---|
| 537 | * a result of all 1s is an error or a valid 255.255.255.255.
|
---|
| 538 | */
|
---|
| 539 | p = *argv;
|
---|
| 540 | n = parse_dotted_ip(p, &mask);
|
---|
| 541 |
|
---|
| 542 | mask = lwip_htonl(mask);
|
---|
| 543 |
|
---|
| 544 | if (n == 0 || p[n] != 0 || (netmask & ~mask) != 0) {
|
---|
| 545 | option_error("invalid netmask value '%s'", *argv);
|
---|
| 546 | return 0;
|
---|
| 547 | }
|
---|
| 548 |
|
---|
| 549 | netmask = mask;
|
---|
| 550 | slprintf(netmask_str, sizeof(netmask_str), "%I", mask);
|
---|
| 551 |
|
---|
| 552 | return (1);
|
---|
| 553 | }
|
---|
| 554 |
|
---|
| 555 | int
|
---|
| 556 | parse_dotted_ip(p, vp)
|
---|
| 557 | char *p;
|
---|
| 558 | u32_t *vp;
|
---|
| 559 | {
|
---|
| 560 | int n;
|
---|
| 561 | u32_t v, b;
|
---|
| 562 | char *endp, *p0 = p;
|
---|
| 563 |
|
---|
| 564 | v = 0;
|
---|
| 565 | for (n = 3;; --n) {
|
---|
| 566 | b = strtoul(p, &endp, 0);
|
---|
| 567 | if (endp == p)
|
---|
| 568 | return 0;
|
---|
| 569 | if (b > 255) {
|
---|
| 570 | if (n < 3)
|
---|
| 571 | return 0;
|
---|
| 572 | /* accept e.g. 0xffffff00 */
|
---|
| 573 | *vp = b;
|
---|
| 574 | return endp - p0;
|
---|
| 575 | }
|
---|
| 576 | v |= b << (n * 8);
|
---|
| 577 | p = endp;
|
---|
| 578 | if (n == 0)
|
---|
| 579 | break;
|
---|
| 580 | if (*p != '.')
|
---|
| 581 | return 0;
|
---|
| 582 | ++p;
|
---|
| 583 | }
|
---|
| 584 | *vp = v;
|
---|
| 585 | return p - p0;
|
---|
| 586 | }
|
---|
| 587 | #endif /* PPP_OPTIONS */
|
---|
| 588 |
|
---|
| 589 | /*
|
---|
| 590 | * ipcp_init - Initialize IPCP.
|
---|
| 591 | */
|
---|
| 592 | static void ipcp_init(ppp_pcb *pcb) {
|
---|
| 593 | fsm *f = &pcb->ipcp_fsm;
|
---|
| 594 |
|
---|
| 595 | ipcp_options *wo = &pcb->ipcp_wantoptions;
|
---|
| 596 | ipcp_options *ao = &pcb->ipcp_allowoptions;
|
---|
| 597 |
|
---|
| 598 | f->pcb = pcb;
|
---|
| 599 | f->protocol = PPP_IPCP;
|
---|
| 600 | f->callbacks = &ipcp_callbacks;
|
---|
| 601 | fsm_init(f);
|
---|
| 602 |
|
---|
| 603 | /*
|
---|
| 604 | * Some 3G modems use repeated IPCP NAKs as a way of stalling
|
---|
| 605 | * until they can contact a server on the network, so we increase
|
---|
| 606 | * the default number of NAKs we accept before we start treating
|
---|
| 607 | * them as rejects.
|
---|
| 608 | */
|
---|
| 609 | f->maxnakloops = 100;
|
---|
| 610 |
|
---|
| 611 | #if 0 /* Not necessary, everything is cleared in ppp_new() */
|
---|
| 612 | memset(wo, 0, sizeof(*wo));
|
---|
| 613 | memset(ao, 0, sizeof(*ao));
|
---|
| 614 | #endif /* 0 */
|
---|
| 615 |
|
---|
| 616 | wo->neg_addr = wo->old_addrs = 1;
|
---|
| 617 | #if VJ_SUPPORT
|
---|
| 618 | wo->neg_vj = 1;
|
---|
| 619 | wo->vj_protocol = IPCP_VJ_COMP;
|
---|
| 620 | wo->maxslotindex = MAX_STATES - 1; /* really max index */
|
---|
| 621 | wo->cflag = 1;
|
---|
| 622 | #endif /* VJ_SUPPORT */
|
---|
| 623 |
|
---|
| 624 | #if 0 /* UNUSED */
|
---|
| 625 | /* wanting default route by default */
|
---|
| 626 | wo->default_route = 1;
|
---|
| 627 | #endif /* UNUSED */
|
---|
| 628 |
|
---|
| 629 | ao->neg_addr = ao->old_addrs = 1;
|
---|
| 630 | #if VJ_SUPPORT
|
---|
| 631 | /* max slots and slot-id compression are currently hardwired in */
|
---|
| 632 | /* ppp_if.c to 16 and 1, this needs to be changed (among other */
|
---|
| 633 | /* things) gmc */
|
---|
| 634 |
|
---|
| 635 | ao->neg_vj = 1;
|
---|
| 636 | ao->maxslotindex = MAX_STATES - 1;
|
---|
| 637 | ao->cflag = 1;
|
---|
| 638 | #endif /* #if VJ_SUPPORT */
|
---|
| 639 |
|
---|
| 640 | #if 0 /* UNUSED */
|
---|
| 641 | /*
|
---|
| 642 | * XXX These control whether the user may use the proxyarp
|
---|
| 643 | * and defaultroute options.
|
---|
| 644 | */
|
---|
| 645 | ao->proxy_arp = 1;
|
---|
| 646 | ao->default_route = 1;
|
---|
| 647 | #endif /* UNUSED */
|
---|
| 648 | }
|
---|
| 649 |
|
---|
| 650 |
|
---|
| 651 | /*
|
---|
| 652 | * ipcp_open - IPCP is allowed to come up.
|
---|
| 653 | */
|
---|
| 654 | static void ipcp_open(ppp_pcb *pcb) {
|
---|
| 655 | fsm *f = &pcb->ipcp_fsm;
|
---|
| 656 | fsm_open(f);
|
---|
| 657 | pcb->ipcp_is_open = 1;
|
---|
| 658 | }
|
---|
| 659 |
|
---|
| 660 |
|
---|
| 661 | /*
|
---|
| 662 | * ipcp_close - Take IPCP down.
|
---|
| 663 | */
|
---|
| 664 | static void ipcp_close(ppp_pcb *pcb, const char *reason) {
|
---|
| 665 | fsm *f = &pcb->ipcp_fsm;
|
---|
| 666 | fsm_close(f, reason);
|
---|
| 667 | }
|
---|
| 668 |
|
---|
| 669 |
|
---|
| 670 | /*
|
---|
| 671 | * ipcp_lowerup - The lower layer is up.
|
---|
| 672 | */
|
---|
| 673 | static void ipcp_lowerup(ppp_pcb *pcb) {
|
---|
| 674 | fsm *f = &pcb->ipcp_fsm;
|
---|
| 675 | fsm_lowerup(f);
|
---|
| 676 | }
|
---|
| 677 |
|
---|
| 678 |
|
---|
| 679 | /*
|
---|
| 680 | * ipcp_lowerdown - The lower layer is down.
|
---|
| 681 | */
|
---|
| 682 | static void ipcp_lowerdown(ppp_pcb *pcb) {
|
---|
| 683 | fsm *f = &pcb->ipcp_fsm;
|
---|
| 684 | fsm_lowerdown(f);
|
---|
| 685 | }
|
---|
| 686 |
|
---|
| 687 |
|
---|
| 688 | /*
|
---|
| 689 | * ipcp_input - Input IPCP packet.
|
---|
| 690 | */
|
---|
| 691 | static void ipcp_input(ppp_pcb *pcb, u_char *p, int len) {
|
---|
| 692 | fsm *f = &pcb->ipcp_fsm;
|
---|
| 693 | fsm_input(f, p, len);
|
---|
| 694 | }
|
---|
| 695 |
|
---|
| 696 |
|
---|
| 697 | /*
|
---|
| 698 | * ipcp_protrej - A Protocol-Reject was received for IPCP.
|
---|
| 699 | *
|
---|
| 700 | * Pretend the lower layer went down, so we shut up.
|
---|
| 701 | */
|
---|
| 702 | static void ipcp_protrej(ppp_pcb *pcb) {
|
---|
| 703 | fsm *f = &pcb->ipcp_fsm;
|
---|
| 704 | fsm_lowerdown(f);
|
---|
| 705 | }
|
---|
| 706 |
|
---|
| 707 |
|
---|
| 708 | /*
|
---|
| 709 | * ipcp_resetci - Reset our CI.
|
---|
| 710 | * Called by fsm_sconfreq, Send Configure Request.
|
---|
| 711 | */
|
---|
| 712 | static void ipcp_resetci(fsm *f) {
|
---|
| 713 | ppp_pcb *pcb = f->pcb;
|
---|
| 714 | ipcp_options *wo = &pcb->ipcp_wantoptions;
|
---|
| 715 | ipcp_options *go = &pcb->ipcp_gotoptions;
|
---|
| 716 | ipcp_options *ao = &pcb->ipcp_allowoptions;
|
---|
| 717 |
|
---|
| 718 | wo->req_addr = (wo->neg_addr || wo->old_addrs) &&
|
---|
| 719 | (ao->neg_addr || ao->old_addrs);
|
---|
| 720 | if (wo->ouraddr == 0)
|
---|
| 721 | wo->accept_local = 1;
|
---|
| 722 | if (wo->hisaddr == 0)
|
---|
| 723 | wo->accept_remote = 1;
|
---|
| 724 | #if LWIP_DNS
|
---|
| 725 | wo->req_dns1 = wo->req_dns2 = pcb->settings.usepeerdns; /* Request DNS addresses from the peer */
|
---|
| 726 | #endif /* LWIP_DNS */
|
---|
| 727 | *go = *wo;
|
---|
| 728 | if (!pcb->ask_for_local)
|
---|
| 729 | go->ouraddr = 0;
|
---|
| 730 | #if 0 /* UNUSED */
|
---|
| 731 | if (ip_choose_hook) {
|
---|
| 732 | ip_choose_hook(&wo->hisaddr);
|
---|
| 733 | if (wo->hisaddr) {
|
---|
| 734 | wo->accept_remote = 0;
|
---|
| 735 | }
|
---|
| 736 | }
|
---|
| 737 | #endif /* UNUSED */
|
---|
| 738 | BZERO(&pcb->ipcp_hisoptions, sizeof(ipcp_options));
|
---|
| 739 | }
|
---|
| 740 |
|
---|
| 741 |
|
---|
| 742 | /*
|
---|
| 743 | * ipcp_cilen - Return length of our CI.
|
---|
| 744 | * Called by fsm_sconfreq, Send Configure Request.
|
---|
| 745 | */
|
---|
| 746 | static int ipcp_cilen(fsm *f) {
|
---|
| 747 | ppp_pcb *pcb = f->pcb;
|
---|
| 748 | ipcp_options *go = &pcb->ipcp_gotoptions;
|
---|
| 749 | #if VJ_SUPPORT
|
---|
| 750 | ipcp_options *wo = &pcb->ipcp_wantoptions;
|
---|
| 751 | #endif /* VJ_SUPPORT */
|
---|
| 752 | ipcp_options *ho = &pcb->ipcp_hisoptions;
|
---|
| 753 |
|
---|
| 754 | #define LENCIADDRS(neg) (neg ? CILEN_ADDRS : 0)
|
---|
| 755 | #if VJ_SUPPORT
|
---|
| 756 | #define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
|
---|
| 757 | #endif /* VJ_SUPPORT */
|
---|
| 758 | #define LENCIADDR(neg) (neg ? CILEN_ADDR : 0)
|
---|
| 759 | #if LWIP_DNS
|
---|
| 760 | #define LENCIDNS(neg) LENCIADDR(neg)
|
---|
| 761 | #endif /* LWIP_DNS */
|
---|
| 762 | #if 0 /* UNUSED - WINS */
|
---|
| 763 | #define LENCIWINS(neg) LENCIADDR(neg)
|
---|
| 764 | #endif /* UNUSED - WINS */
|
---|
| 765 |
|
---|
| 766 | /*
|
---|
| 767 | * First see if we want to change our options to the old
|
---|
| 768 | * forms because we have received old forms from the peer.
|
---|
| 769 | */
|
---|
| 770 | if (go->neg_addr && go->old_addrs && !ho->neg_addr && ho->old_addrs)
|
---|
| 771 | go->neg_addr = 0;
|
---|
| 772 |
|
---|
| 773 | #if VJ_SUPPORT
|
---|
| 774 | if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
|
---|
| 775 | /* try an older style of VJ negotiation */
|
---|
| 776 | /* use the old style only if the peer did */
|
---|
| 777 | if (ho->neg_vj && ho->old_vj) {
|
---|
| 778 | go->neg_vj = 1;
|
---|
| 779 | go->old_vj = 1;
|
---|
| 780 | go->vj_protocol = ho->vj_protocol;
|
---|
| 781 | }
|
---|
| 782 | }
|
---|
| 783 | #endif /* VJ_SUPPORT */
|
---|
| 784 |
|
---|
| 785 | return (LENCIADDRS(!go->neg_addr && go->old_addrs) +
|
---|
| 786 | #if VJ_SUPPORT
|
---|
| 787 | LENCIVJ(go->neg_vj, go->old_vj) +
|
---|
| 788 | #endif /* VJ_SUPPORT */
|
---|
| 789 | LENCIADDR(go->neg_addr) +
|
---|
| 790 | #if LWIP_DNS
|
---|
| 791 | LENCIDNS(go->req_dns1) +
|
---|
| 792 | LENCIDNS(go->req_dns2) +
|
---|
| 793 | #endif /* LWIP_DNS */
|
---|
| 794 | #if 0 /* UNUSED - WINS */
|
---|
| 795 | LENCIWINS(go->winsaddr[0]) +
|
---|
| 796 | LENCIWINS(go->winsaddr[1]) +
|
---|
| 797 | #endif /* UNUSED - WINS */
|
---|
| 798 | 0);
|
---|
| 799 | }
|
---|
| 800 |
|
---|
| 801 |
|
---|
| 802 | /*
|
---|
| 803 | * ipcp_addci - Add our desired CIs to a packet.
|
---|
| 804 | * Called by fsm_sconfreq, Send Configure Request.
|
---|
| 805 | */
|
---|
| 806 | static void ipcp_addci(fsm *f, u_char *ucp, int *lenp) {
|
---|
| 807 | ppp_pcb *pcb = f->pcb;
|
---|
| 808 | ipcp_options *go = &pcb->ipcp_gotoptions;
|
---|
| 809 | int len = *lenp;
|
---|
| 810 |
|
---|
| 811 | #define ADDCIADDRS(opt, neg, val1, val2) \
|
---|
| 812 | if (neg) { \
|
---|
| 813 | if (len >= CILEN_ADDRS) { \
|
---|
| 814 | u32_t l; \
|
---|
| 815 | PUTCHAR(opt, ucp); \
|
---|
| 816 | PUTCHAR(CILEN_ADDRS, ucp); \
|
---|
| 817 | l = lwip_ntohl(val1); \
|
---|
| 818 | PUTLONG(l, ucp); \
|
---|
| 819 | l = lwip_ntohl(val2); \
|
---|
| 820 | PUTLONG(l, ucp); \
|
---|
| 821 | len -= CILEN_ADDRS; \
|
---|
| 822 | } else \
|
---|
| 823 | go->old_addrs = 0; \
|
---|
| 824 | }
|
---|
| 825 |
|
---|
| 826 | #if VJ_SUPPORT
|
---|
| 827 | #define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
|
---|
| 828 | if (neg) { \
|
---|
| 829 | int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
|
---|
| 830 | if (len >= vjlen) { \
|
---|
| 831 | PUTCHAR(opt, ucp); \
|
---|
| 832 | PUTCHAR(vjlen, ucp); \
|
---|
| 833 | PUTSHORT(val, ucp); \
|
---|
| 834 | if (!old) { \
|
---|
| 835 | PUTCHAR(maxslotindex, ucp); \
|
---|
| 836 | PUTCHAR(cflag, ucp); \
|
---|
| 837 | } \
|
---|
| 838 | len -= vjlen; \
|
---|
| 839 | } else \
|
---|
| 840 | neg = 0; \
|
---|
| 841 | }
|
---|
| 842 | #endif /* VJ_SUPPORT */
|
---|
| 843 |
|
---|
| 844 | #define ADDCIADDR(opt, neg, val) \
|
---|
| 845 | if (neg) { \
|
---|
| 846 | if (len >= CILEN_ADDR) { \
|
---|
| 847 | u32_t l; \
|
---|
| 848 | PUTCHAR(opt, ucp); \
|
---|
| 849 | PUTCHAR(CILEN_ADDR, ucp); \
|
---|
| 850 | l = lwip_ntohl(val); \
|
---|
| 851 | PUTLONG(l, ucp); \
|
---|
| 852 | len -= CILEN_ADDR; \
|
---|
| 853 | } else \
|
---|
| 854 | neg = 0; \
|
---|
| 855 | }
|
---|
| 856 |
|
---|
| 857 | #if LWIP_DNS
|
---|
| 858 | #define ADDCIDNS(opt, neg, addr) \
|
---|
| 859 | if (neg) { \
|
---|
| 860 | if (len >= CILEN_ADDR) { \
|
---|
| 861 | u32_t l; \
|
---|
| 862 | PUTCHAR(opt, ucp); \
|
---|
| 863 | PUTCHAR(CILEN_ADDR, ucp); \
|
---|
| 864 | l = lwip_ntohl(addr); \
|
---|
| 865 | PUTLONG(l, ucp); \
|
---|
| 866 | len -= CILEN_ADDR; \
|
---|
| 867 | } else \
|
---|
| 868 | neg = 0; \
|
---|
| 869 | }
|
---|
| 870 | #endif /* LWIP_DNS */
|
---|
| 871 |
|
---|
| 872 | #if 0 /* UNUSED - WINS */
|
---|
| 873 | #define ADDCIWINS(opt, addr) \
|
---|
| 874 | if (addr) { \
|
---|
| 875 | if (len >= CILEN_ADDR) { \
|
---|
| 876 | u32_t l; \
|
---|
| 877 | PUTCHAR(opt, ucp); \
|
---|
| 878 | PUTCHAR(CILEN_ADDR, ucp); \
|
---|
| 879 | l = lwip_ntohl(addr); \
|
---|
| 880 | PUTLONG(l, ucp); \
|
---|
| 881 | len -= CILEN_ADDR; \
|
---|
| 882 | } else \
|
---|
| 883 | addr = 0; \
|
---|
| 884 | }
|
---|
| 885 | #endif /* UNUSED - WINS */
|
---|
| 886 |
|
---|
| 887 | ADDCIADDRS(CI_ADDRS, !go->neg_addr && go->old_addrs, go->ouraddr,
|
---|
| 888 | go->hisaddr);
|
---|
| 889 |
|
---|
| 890 | #if VJ_SUPPORT
|
---|
| 891 | ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
|
---|
| 892 | go->maxslotindex, go->cflag);
|
---|
| 893 | #endif /* VJ_SUPPORT */
|
---|
| 894 |
|
---|
| 895 | ADDCIADDR(CI_ADDR, go->neg_addr, go->ouraddr);
|
---|
| 896 |
|
---|
| 897 | #if LWIP_DNS
|
---|
| 898 | ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
|
---|
| 899 |
|
---|
| 900 | ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
|
---|
| 901 | #endif /* LWIP_DNS */
|
---|
| 902 |
|
---|
| 903 | #if 0 /* UNUSED - WINS */
|
---|
| 904 | ADDCIWINS(CI_MS_WINS1, go->winsaddr[0]);
|
---|
| 905 |
|
---|
| 906 | ADDCIWINS(CI_MS_WINS2, go->winsaddr[1]);
|
---|
| 907 | #endif /* UNUSED - WINS */
|
---|
| 908 |
|
---|
| 909 | *lenp -= len;
|
---|
| 910 | }
|
---|
| 911 |
|
---|
| 912 |
|
---|
| 913 | /*
|
---|
| 914 | * ipcp_ackci - Ack our CIs.
|
---|
| 915 | * Called by fsm_rconfack, Receive Configure ACK.
|
---|
| 916 | *
|
---|
| 917 | * Returns:
|
---|
| 918 | * 0 - Ack was bad.
|
---|
| 919 | * 1 - Ack was good.
|
---|
| 920 | */
|
---|
| 921 | static int ipcp_ackci(fsm *f, u_char *p, int len) {
|
---|
| 922 | ppp_pcb *pcb = f->pcb;
|
---|
| 923 | ipcp_options *go = &pcb->ipcp_gotoptions;
|
---|
| 924 | u_short cilen, citype;
|
---|
| 925 | u32_t cilong;
|
---|
| 926 | #if VJ_SUPPORT
|
---|
| 927 | u_short cishort;
|
---|
| 928 | u_char cimaxslotindex, cicflag;
|
---|
| 929 | #endif /* VJ_SUPPORT */
|
---|
| 930 |
|
---|
| 931 | /*
|
---|
| 932 | * CIs must be in exactly the same order that we sent...
|
---|
| 933 | * Check packet length and CI length at each step.
|
---|
| 934 | * If we find any deviations, then this packet is bad.
|
---|
| 935 | */
|
---|
| 936 |
|
---|
| 937 | #define ACKCIADDRS(opt, neg, val1, val2) \
|
---|
| 938 | if (neg) { \
|
---|
| 939 | u32_t l; \
|
---|
| 940 | if ((len -= CILEN_ADDRS) < 0) \
|
---|
| 941 | goto bad; \
|
---|
| 942 | GETCHAR(citype, p); \
|
---|
| 943 | GETCHAR(cilen, p); \
|
---|
| 944 | if (cilen != CILEN_ADDRS || \
|
---|
| 945 | citype != opt) \
|
---|
| 946 | goto bad; \
|
---|
| 947 | GETLONG(l, p); \
|
---|
| 948 | cilong = lwip_htonl(l); \
|
---|
| 949 | if (val1 != cilong) \
|
---|
| 950 | goto bad; \
|
---|
| 951 | GETLONG(l, p); \
|
---|
| 952 | cilong = lwip_htonl(l); \
|
---|
| 953 | if (val2 != cilong) \
|
---|
| 954 | goto bad; \
|
---|
| 955 | }
|
---|
| 956 |
|
---|
| 957 | #if VJ_SUPPORT
|
---|
| 958 | #define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
|
---|
| 959 | if (neg) { \
|
---|
| 960 | int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
|
---|
| 961 | if ((len -= vjlen) < 0) \
|
---|
| 962 | goto bad; \
|
---|
| 963 | GETCHAR(citype, p); \
|
---|
| 964 | GETCHAR(cilen, p); \
|
---|
| 965 | if (cilen != vjlen || \
|
---|
| 966 | citype != opt) \
|
---|
| 967 | goto bad; \
|
---|
| 968 | GETSHORT(cishort, p); \
|
---|
| 969 | if (cishort != val) \
|
---|
| 970 | goto bad; \
|
---|
| 971 | if (!old) { \
|
---|
| 972 | GETCHAR(cimaxslotindex, p); \
|
---|
| 973 | if (cimaxslotindex != maxslotindex) \
|
---|
| 974 | goto bad; \
|
---|
| 975 | GETCHAR(cicflag, p); \
|
---|
| 976 | if (cicflag != cflag) \
|
---|
| 977 | goto bad; \
|
---|
| 978 | } \
|
---|
| 979 | }
|
---|
| 980 | #endif /* VJ_SUPPORT */
|
---|
| 981 |
|
---|
| 982 | #define ACKCIADDR(opt, neg, val) \
|
---|
| 983 | if (neg) { \
|
---|
| 984 | u32_t l; \
|
---|
| 985 | if ((len -= CILEN_ADDR) < 0) \
|
---|
| 986 | goto bad; \
|
---|
| 987 | GETCHAR(citype, p); \
|
---|
| 988 | GETCHAR(cilen, p); \
|
---|
| 989 | if (cilen != CILEN_ADDR || \
|
---|
| 990 | citype != opt) \
|
---|
| 991 | goto bad; \
|
---|
| 992 | GETLONG(l, p); \
|
---|
| 993 | cilong = lwip_htonl(l); \
|
---|
| 994 | if (val != cilong) \
|
---|
| 995 | goto bad; \
|
---|
| 996 | }
|
---|
| 997 |
|
---|
| 998 | #if LWIP_DNS
|
---|
| 999 | #define ACKCIDNS(opt, neg, addr) \
|
---|
| 1000 | if (neg) { \
|
---|
| 1001 | u32_t l; \
|
---|
| 1002 | if ((len -= CILEN_ADDR) < 0) \
|
---|
| 1003 | goto bad; \
|
---|
| 1004 | GETCHAR(citype, p); \
|
---|
| 1005 | GETCHAR(cilen, p); \
|
---|
| 1006 | if (cilen != CILEN_ADDR || citype != opt) \
|
---|
| 1007 | goto bad; \
|
---|
| 1008 | GETLONG(l, p); \
|
---|
| 1009 | cilong = lwip_htonl(l); \
|
---|
| 1010 | if (addr != cilong) \
|
---|
| 1011 | goto bad; \
|
---|
| 1012 | }
|
---|
| 1013 | #endif /* LWIP_DNS */
|
---|
| 1014 |
|
---|
| 1015 | #if 0 /* UNUSED - WINS */
|
---|
| 1016 | #define ACKCIWINS(opt, addr) \
|
---|
| 1017 | if (addr) { \
|
---|
| 1018 | u32_t l; \
|
---|
| 1019 | if ((len -= CILEN_ADDR) < 0) \
|
---|
| 1020 | goto bad; \
|
---|
| 1021 | GETCHAR(citype, p); \
|
---|
| 1022 | GETCHAR(cilen, p); \
|
---|
| 1023 | if (cilen != CILEN_ADDR || citype != opt) \
|
---|
| 1024 | goto bad; \
|
---|
| 1025 | GETLONG(l, p); \
|
---|
| 1026 | cilong = lwip_htonl(l); \
|
---|
| 1027 | if (addr != cilong) \
|
---|
| 1028 | goto bad; \
|
---|
| 1029 | }
|
---|
| 1030 | #endif /* UNUSED - WINS */
|
---|
| 1031 |
|
---|
| 1032 | ACKCIADDRS(CI_ADDRS, !go->neg_addr && go->old_addrs, go->ouraddr,
|
---|
| 1033 | go->hisaddr);
|
---|
| 1034 |
|
---|
| 1035 | #if VJ_SUPPORT
|
---|
| 1036 | ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
|
---|
| 1037 | go->maxslotindex, go->cflag);
|
---|
| 1038 | #endif /* VJ_SUPPORT */
|
---|
| 1039 |
|
---|
| 1040 | ACKCIADDR(CI_ADDR, go->neg_addr, go->ouraddr);
|
---|
| 1041 |
|
---|
| 1042 | #if LWIP_DNS
|
---|
| 1043 | ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
|
---|
| 1044 |
|
---|
| 1045 | ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
|
---|
| 1046 | #endif /* LWIP_DNS */
|
---|
| 1047 |
|
---|
| 1048 | #if 0 /* UNUSED - WINS */
|
---|
| 1049 | ACKCIWINS(CI_MS_WINS1, go->winsaddr[0]);
|
---|
| 1050 |
|
---|
| 1051 | ACKCIWINS(CI_MS_WINS2, go->winsaddr[1]);
|
---|
| 1052 | #endif /* UNUSED - WINS */
|
---|
| 1053 |
|
---|
| 1054 | /*
|
---|
| 1055 | * If there are any remaining CIs, then this packet is bad.
|
---|
| 1056 | */
|
---|
| 1057 | if (len != 0)
|
---|
| 1058 | goto bad;
|
---|
| 1059 | return (1);
|
---|
| 1060 |
|
---|
| 1061 | bad:
|
---|
| 1062 | IPCPDEBUG(("ipcp_ackci: received bad Ack!"));
|
---|
| 1063 | return (0);
|
---|
| 1064 | }
|
---|
| 1065 |
|
---|
| 1066 | /*
|
---|
| 1067 | * ipcp_nakci - Peer has sent a NAK for some of our CIs.
|
---|
| 1068 | * This should not modify any state if the Nak is bad
|
---|
| 1069 | * or if IPCP is in the OPENED state.
|
---|
| 1070 | * Calback from fsm_rconfnakrej - Receive Configure-Nak or Configure-Reject.
|
---|
| 1071 | *
|
---|
| 1072 | * Returns:
|
---|
| 1073 | * 0 - Nak was bad.
|
---|
| 1074 | * 1 - Nak was good.
|
---|
| 1075 | */
|
---|
| 1076 | static int ipcp_nakci(fsm *f, u_char *p, int len, int treat_as_reject) {
|
---|
| 1077 | ppp_pcb *pcb = f->pcb;
|
---|
| 1078 | ipcp_options *go = &pcb->ipcp_gotoptions;
|
---|
| 1079 | u_char citype, cilen, *next;
|
---|
| 1080 | #if VJ_SUPPORT
|
---|
| 1081 | u_char cimaxslotindex, cicflag;
|
---|
| 1082 | u_short cishort;
|
---|
| 1083 | #endif /* VJ_SUPPORT */
|
---|
| 1084 | u32_t ciaddr1, ciaddr2, l;
|
---|
| 1085 | #if LWIP_DNS
|
---|
| 1086 | u32_t cidnsaddr;
|
---|
| 1087 | #endif /* LWIP_DNS */
|
---|
| 1088 | ipcp_options no; /* options we've seen Naks for */
|
---|
| 1089 | ipcp_options try_; /* options to request next time */
|
---|
| 1090 |
|
---|
| 1091 | BZERO(&no, sizeof(no));
|
---|
| 1092 | try_ = *go;
|
---|
| 1093 |
|
---|
| 1094 | /*
|
---|
| 1095 | * Any Nak'd CIs must be in exactly the same order that we sent.
|
---|
| 1096 | * Check packet length and CI length at each step.
|
---|
| 1097 | * If we find any deviations, then this packet is bad.
|
---|
| 1098 | */
|
---|
| 1099 | #define NAKCIADDRS(opt, neg, code) \
|
---|
| 1100 | if ((neg) && \
|
---|
| 1101 | (cilen = p[1]) == CILEN_ADDRS && \
|
---|
| 1102 | len >= cilen && \
|
---|
| 1103 | p[0] == opt) { \
|
---|
| 1104 | len -= cilen; \
|
---|
| 1105 | INCPTR(2, p); \
|
---|
| 1106 | GETLONG(l, p); \
|
---|
| 1107 | ciaddr1 = lwip_htonl(l); \
|
---|
| 1108 | GETLONG(l, p); \
|
---|
| 1109 | ciaddr2 = lwip_htonl(l); \
|
---|
| 1110 | no.old_addrs = 1; \
|
---|
| 1111 | code \
|
---|
| 1112 | }
|
---|
| 1113 |
|
---|
| 1114 | #if VJ_SUPPORT
|
---|
| 1115 | #define NAKCIVJ(opt, neg, code) \
|
---|
| 1116 | if (go->neg && \
|
---|
| 1117 | ((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \
|
---|
| 1118 | len >= cilen && \
|
---|
| 1119 | p[0] == opt) { \
|
---|
| 1120 | len -= cilen; \
|
---|
| 1121 | INCPTR(2, p); \
|
---|
| 1122 | GETSHORT(cishort, p); \
|
---|
| 1123 | no.neg = 1; \
|
---|
| 1124 | code \
|
---|
| 1125 | }
|
---|
| 1126 | #endif /* VJ_SUPPORT */
|
---|
| 1127 |
|
---|
| 1128 | #define NAKCIADDR(opt, neg, code) \
|
---|
| 1129 | if (go->neg && \
|
---|
| 1130 | (cilen = p[1]) == CILEN_ADDR && \
|
---|
| 1131 | len >= cilen && \
|
---|
| 1132 | p[0] == opt) { \
|
---|
| 1133 | len -= cilen; \
|
---|
| 1134 | INCPTR(2, p); \
|
---|
| 1135 | GETLONG(l, p); \
|
---|
| 1136 | ciaddr1 = lwip_htonl(l); \
|
---|
| 1137 | no.neg = 1; \
|
---|
| 1138 | code \
|
---|
| 1139 | }
|
---|
| 1140 |
|
---|
| 1141 | #if LWIP_DNS
|
---|
| 1142 | #define NAKCIDNS(opt, neg, code) \
|
---|
| 1143 | if (go->neg && \
|
---|
| 1144 | ((cilen = p[1]) == CILEN_ADDR) && \
|
---|
| 1145 | len >= cilen && \
|
---|
| 1146 | p[0] == opt) { \
|
---|
| 1147 | len -= cilen; \
|
---|
| 1148 | INCPTR(2, p); \
|
---|
| 1149 | GETLONG(l, p); \
|
---|
| 1150 | cidnsaddr = lwip_htonl(l); \
|
---|
| 1151 | no.neg = 1; \
|
---|
| 1152 | code \
|
---|
| 1153 | }
|
---|
| 1154 | #endif /* LWIP_DNS */
|
---|
| 1155 |
|
---|
| 1156 | /*
|
---|
| 1157 | * Accept the peer's idea of {our,his} address, if different
|
---|
| 1158 | * from our idea, only if the accept_{local,remote} flag is set.
|
---|
| 1159 | */
|
---|
| 1160 | NAKCIADDRS(CI_ADDRS, !go->neg_addr && go->old_addrs,
|
---|
| 1161 | if (treat_as_reject) {
|
---|
| 1162 | try_.old_addrs = 0;
|
---|
| 1163 | } else {
|
---|
| 1164 | if (go->accept_local && ciaddr1) {
|
---|
| 1165 | /* take his idea of our address */
|
---|
| 1166 | try_.ouraddr = ciaddr1;
|
---|
| 1167 | }
|
---|
| 1168 | if (go->accept_remote && ciaddr2) {
|
---|
| 1169 | /* take his idea of his address */
|
---|
| 1170 | try_.hisaddr = ciaddr2;
|
---|
| 1171 | }
|
---|
| 1172 | }
|
---|
| 1173 | );
|
---|
| 1174 |
|
---|
| 1175 | #if VJ_SUPPORT
|
---|
| 1176 | /*
|
---|
| 1177 | * Accept the peer's value of maxslotindex provided that it
|
---|
| 1178 | * is less than what we asked for. Turn off slot-ID compression
|
---|
| 1179 | * if the peer wants. Send old-style compress-type option if
|
---|
| 1180 | * the peer wants.
|
---|
| 1181 | */
|
---|
| 1182 | NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
|
---|
| 1183 | if (treat_as_reject) {
|
---|
| 1184 | try_.neg_vj = 0;
|
---|
| 1185 | } else if (cilen == CILEN_VJ) {
|
---|
| 1186 | GETCHAR(cimaxslotindex, p);
|
---|
| 1187 | GETCHAR(cicflag, p);
|
---|
| 1188 | if (cishort == IPCP_VJ_COMP) {
|
---|
| 1189 | try_.old_vj = 0;
|
---|
| 1190 | if (cimaxslotindex < go->maxslotindex)
|
---|
| 1191 | try_.maxslotindex = cimaxslotindex;
|
---|
| 1192 | if (!cicflag)
|
---|
| 1193 | try_.cflag = 0;
|
---|
| 1194 | } else {
|
---|
| 1195 | try_.neg_vj = 0;
|
---|
| 1196 | }
|
---|
| 1197 | } else {
|
---|
| 1198 | if (cishort == IPCP_VJ_COMP || cishort == IPCP_VJ_COMP_OLD) {
|
---|
| 1199 | try_.old_vj = 1;
|
---|
| 1200 | try_.vj_protocol = cishort;
|
---|
| 1201 | } else {
|
---|
| 1202 | try_.neg_vj = 0;
|
---|
| 1203 | }
|
---|
| 1204 | }
|
---|
| 1205 | );
|
---|
| 1206 | #endif /* VJ_SUPPORT */
|
---|
| 1207 |
|
---|
| 1208 | NAKCIADDR(CI_ADDR, neg_addr,
|
---|
| 1209 | if (treat_as_reject) {
|
---|
| 1210 | try_.neg_addr = 0;
|
---|
| 1211 | try_.old_addrs = 0;
|
---|
| 1212 | } else if (go->accept_local && ciaddr1) {
|
---|
| 1213 | /* take his idea of our address */
|
---|
| 1214 | try_.ouraddr = ciaddr1;
|
---|
| 1215 | }
|
---|
| 1216 | );
|
---|
| 1217 |
|
---|
| 1218 | #if LWIP_DNS
|
---|
| 1219 | NAKCIDNS(CI_MS_DNS1, req_dns1,
|
---|
| 1220 | if (treat_as_reject) {
|
---|
| 1221 | try_.req_dns1 = 0;
|
---|
| 1222 | } else {
|
---|
| 1223 | try_.dnsaddr[0] = cidnsaddr;
|
---|
| 1224 | }
|
---|
| 1225 | );
|
---|
| 1226 |
|
---|
| 1227 | NAKCIDNS(CI_MS_DNS2, req_dns2,
|
---|
| 1228 | if (treat_as_reject) {
|
---|
| 1229 | try_.req_dns2 = 0;
|
---|
| 1230 | } else {
|
---|
| 1231 | try_.dnsaddr[1] = cidnsaddr;
|
---|
| 1232 | }
|
---|
| 1233 | );
|
---|
| 1234 | #endif /* #if LWIP_DNS */
|
---|
| 1235 |
|
---|
| 1236 | /*
|
---|
| 1237 | * There may be remaining CIs, if the peer is requesting negotiation
|
---|
| 1238 | * on an option that we didn't include in our request packet.
|
---|
| 1239 | * If they want to negotiate about IP addresses, we comply.
|
---|
| 1240 | * If they want us to ask for compression, we refuse.
|
---|
| 1241 | * If they want us to ask for ms-dns, we do that, since some
|
---|
| 1242 | * peers get huffy if we don't.
|
---|
| 1243 | */
|
---|
| 1244 | while (len >= CILEN_VOID) {
|
---|
| 1245 | GETCHAR(citype, p);
|
---|
| 1246 | GETCHAR(cilen, p);
|
---|
| 1247 | if ( cilen < CILEN_VOID || (len -= cilen) < 0 )
|
---|
| 1248 | goto bad;
|
---|
| 1249 | next = p + cilen - 2;
|
---|
| 1250 |
|
---|
| 1251 | switch (citype) {
|
---|
| 1252 | #if VJ_SUPPORT
|
---|
| 1253 | case CI_COMPRESSTYPE:
|
---|
| 1254 | if (go->neg_vj || no.neg_vj ||
|
---|
| 1255 | (cilen != CILEN_VJ && cilen != CILEN_COMPRESS))
|
---|
| 1256 | goto bad;
|
---|
| 1257 | no.neg_vj = 1;
|
---|
| 1258 | break;
|
---|
| 1259 | #endif /* VJ_SUPPORT */
|
---|
| 1260 | case CI_ADDRS:
|
---|
| 1261 | if ((!go->neg_addr && go->old_addrs) || no.old_addrs
|
---|
| 1262 | || cilen != CILEN_ADDRS)
|
---|
| 1263 | goto bad;
|
---|
| 1264 | try_.neg_addr = 0;
|
---|
| 1265 | GETLONG(l, p);
|
---|
| 1266 | ciaddr1 = lwip_htonl(l);
|
---|
| 1267 | if (ciaddr1 && go->accept_local)
|
---|
| 1268 | try_.ouraddr = ciaddr1;
|
---|
| 1269 | GETLONG(l, p);
|
---|
| 1270 | ciaddr2 = lwip_htonl(l);
|
---|
| 1271 | if (ciaddr2 && go->accept_remote)
|
---|
| 1272 | try_.hisaddr = ciaddr2;
|
---|
| 1273 | no.old_addrs = 1;
|
---|
| 1274 | break;
|
---|
| 1275 | case CI_ADDR:
|
---|
| 1276 | if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR)
|
---|
| 1277 | goto bad;
|
---|
| 1278 | try_.old_addrs = 0;
|
---|
| 1279 | GETLONG(l, p);
|
---|
| 1280 | ciaddr1 = lwip_htonl(l);
|
---|
| 1281 | if (ciaddr1 && go->accept_local)
|
---|
| 1282 | try_.ouraddr = ciaddr1;
|
---|
| 1283 | if (try_.ouraddr != 0)
|
---|
| 1284 | try_.neg_addr = 1;
|
---|
| 1285 | no.neg_addr = 1;
|
---|
| 1286 | break;
|
---|
| 1287 | #if LWIP_DNS
|
---|
| 1288 | case CI_MS_DNS1:
|
---|
| 1289 | if (go->req_dns1 || no.req_dns1 || cilen != CILEN_ADDR)
|
---|
| 1290 | goto bad;
|
---|
| 1291 | GETLONG(l, p);
|
---|
| 1292 | try_.dnsaddr[0] = lwip_htonl(l);
|
---|
| 1293 | try_.req_dns1 = 1;
|
---|
| 1294 | no.req_dns1 = 1;
|
---|
| 1295 | break;
|
---|
| 1296 | case CI_MS_DNS2:
|
---|
| 1297 | if (go->req_dns2 || no.req_dns2 || cilen != CILEN_ADDR)
|
---|
| 1298 | goto bad;
|
---|
| 1299 | GETLONG(l, p);
|
---|
| 1300 | try_.dnsaddr[1] = lwip_htonl(l);
|
---|
| 1301 | try_.req_dns2 = 1;
|
---|
| 1302 | no.req_dns2 = 1;
|
---|
| 1303 | break;
|
---|
| 1304 | #endif /* LWIP_DNS */
|
---|
| 1305 | #if 0 /* UNUSED - WINS */
|
---|
| 1306 | case CI_MS_WINS1:
|
---|
| 1307 | case CI_MS_WINS2:
|
---|
| 1308 | if (cilen != CILEN_ADDR)
|
---|
| 1309 | goto bad;
|
---|
| 1310 | GETLONG(l, p);
|
---|
| 1311 | ciaddr1 = lwip_htonl(l);
|
---|
| 1312 | if (ciaddr1)
|
---|
| 1313 | try_.winsaddr[citype == CI_MS_WINS2] = ciaddr1;
|
---|
| 1314 | break;
|
---|
| 1315 | #endif /* UNUSED - WINS */
|
---|
| 1316 | default:
|
---|
| 1317 | break;
|
---|
| 1318 | }
|
---|
| 1319 | p = next;
|
---|
| 1320 | }
|
---|
| 1321 |
|
---|
| 1322 | /*
|
---|
| 1323 | * OK, the Nak is good. Now we can update state.
|
---|
| 1324 | * If there are any remaining options, we ignore them.
|
---|
| 1325 | */
|
---|
| 1326 | if (f->state != PPP_FSM_OPENED)
|
---|
| 1327 | *go = try_;
|
---|
| 1328 |
|
---|
| 1329 | return 1;
|
---|
| 1330 |
|
---|
| 1331 | bad:
|
---|
| 1332 | IPCPDEBUG(("ipcp_nakci: received bad Nak!"));
|
---|
| 1333 | return 0;
|
---|
| 1334 | }
|
---|
| 1335 |
|
---|
| 1336 |
|
---|
| 1337 | /*
|
---|
| 1338 | * ipcp_rejci - Reject some of our CIs.
|
---|
| 1339 | * Callback from fsm_rconfnakrej.
|
---|
| 1340 | */
|
---|
| 1341 | static int ipcp_rejci(fsm *f, u_char *p, int len) {
|
---|
| 1342 | ppp_pcb *pcb = f->pcb;
|
---|
| 1343 | ipcp_options *go = &pcb->ipcp_gotoptions;
|
---|
| 1344 | u_char cilen;
|
---|
| 1345 | #if VJ_SUPPORT
|
---|
| 1346 | u_char cimaxslotindex, ciflag;
|
---|
| 1347 | u_short cishort;
|
---|
| 1348 | #endif /* VJ_SUPPORT */
|
---|
| 1349 | u32_t cilong;
|
---|
| 1350 | ipcp_options try_; /* options to request next time */
|
---|
| 1351 |
|
---|
| 1352 | try_ = *go;
|
---|
| 1353 | /*
|
---|
| 1354 | * Any Rejected CIs must be in exactly the same order that we sent.
|
---|
| 1355 | * Check packet length and CI length at each step.
|
---|
| 1356 | * If we find any deviations, then this packet is bad.
|
---|
| 1357 | */
|
---|
| 1358 | #define REJCIADDRS(opt, neg, val1, val2) \
|
---|
| 1359 | if ((neg) && \
|
---|
| 1360 | (cilen = p[1]) == CILEN_ADDRS && \
|
---|
| 1361 | len >= cilen && \
|
---|
| 1362 | p[0] == opt) { \
|
---|
| 1363 | u32_t l; \
|
---|
| 1364 | len -= cilen; \
|
---|
| 1365 | INCPTR(2, p); \
|
---|
| 1366 | GETLONG(l, p); \
|
---|
| 1367 | cilong = lwip_htonl(l); \
|
---|
| 1368 | /* Check rejected value. */ \
|
---|
| 1369 | if (cilong != val1) \
|
---|
| 1370 | goto bad; \
|
---|
| 1371 | GETLONG(l, p); \
|
---|
| 1372 | cilong = lwip_htonl(l); \
|
---|
| 1373 | /* Check rejected value. */ \
|
---|
| 1374 | if (cilong != val2) \
|
---|
| 1375 | goto bad; \
|
---|
| 1376 | try_.old_addrs = 0; \
|
---|
| 1377 | }
|
---|
| 1378 |
|
---|
| 1379 | #if VJ_SUPPORT
|
---|
| 1380 | #define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
|
---|
| 1381 | if (go->neg && \
|
---|
| 1382 | p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
|
---|
| 1383 | len >= p[1] && \
|
---|
| 1384 | p[0] == opt) { \
|
---|
| 1385 | len -= p[1]; \
|
---|
| 1386 | INCPTR(2, p); \
|
---|
| 1387 | GETSHORT(cishort, p); \
|
---|
| 1388 | /* Check rejected value. */ \
|
---|
| 1389 | if (cishort != val) \
|
---|
| 1390 | goto bad; \
|
---|
| 1391 | if (!old) { \
|
---|
| 1392 | GETCHAR(cimaxslotindex, p); \
|
---|
| 1393 | if (cimaxslotindex != maxslot) \
|
---|
| 1394 | goto bad; \
|
---|
| 1395 | GETCHAR(ciflag, p); \
|
---|
| 1396 | if (ciflag != cflag) \
|
---|
| 1397 | goto bad; \
|
---|
| 1398 | } \
|
---|
| 1399 | try_.neg = 0; \
|
---|
| 1400 | }
|
---|
| 1401 | #endif /* VJ_SUPPORT */
|
---|
| 1402 |
|
---|
| 1403 | #define REJCIADDR(opt, neg, val) \
|
---|
| 1404 | if (go->neg && \
|
---|
| 1405 | (cilen = p[1]) == CILEN_ADDR && \
|
---|
| 1406 | len >= cilen && \
|
---|
| 1407 | p[0] == opt) { \
|
---|
| 1408 | u32_t l; \
|
---|
| 1409 | len -= cilen; \
|
---|
| 1410 | INCPTR(2, p); \
|
---|
| 1411 | GETLONG(l, p); \
|
---|
| 1412 | cilong = lwip_htonl(l); \
|
---|
| 1413 | /* Check rejected value. */ \
|
---|
| 1414 | if (cilong != val) \
|
---|
| 1415 | goto bad; \
|
---|
| 1416 | try_.neg = 0; \
|
---|
| 1417 | }
|
---|
| 1418 |
|
---|
| 1419 | #if LWIP_DNS
|
---|
| 1420 | #define REJCIDNS(opt, neg, dnsaddr) \
|
---|
| 1421 | if (go->neg && \
|
---|
| 1422 | ((cilen = p[1]) == CILEN_ADDR) && \
|
---|
| 1423 | len >= cilen && \
|
---|
| 1424 | p[0] == opt) { \
|
---|
| 1425 | u32_t l; \
|
---|
| 1426 | len -= cilen; \
|
---|
| 1427 | INCPTR(2, p); \
|
---|
| 1428 | GETLONG(l, p); \
|
---|
| 1429 | cilong = lwip_htonl(l); \
|
---|
| 1430 | /* Check rejected value. */ \
|
---|
| 1431 | if (cilong != dnsaddr) \
|
---|
| 1432 | goto bad; \
|
---|
| 1433 | try_.neg = 0; \
|
---|
| 1434 | }
|
---|
| 1435 | #endif /* LWIP_DNS */
|
---|
| 1436 |
|
---|
| 1437 | #if 0 /* UNUSED - WINS */
|
---|
| 1438 | #define REJCIWINS(opt, addr) \
|
---|
| 1439 | if (addr && \
|
---|
| 1440 | ((cilen = p[1]) == CILEN_ADDR) && \
|
---|
| 1441 | len >= cilen && \
|
---|
| 1442 | p[0] == opt) { \
|
---|
| 1443 | u32_t l; \
|
---|
| 1444 | len -= cilen; \
|
---|
| 1445 | INCPTR(2, p); \
|
---|
| 1446 | GETLONG(l, p); \
|
---|
| 1447 | cilong = lwip_htonl(l); \
|
---|
| 1448 | /* Check rejected value. */ \
|
---|
| 1449 | if (cilong != addr) \
|
---|
| 1450 | goto bad; \
|
---|
| 1451 | try_.winsaddr[opt == CI_MS_WINS2] = 0; \
|
---|
| 1452 | }
|
---|
| 1453 | #endif /* UNUSED - WINS */
|
---|
| 1454 |
|
---|
| 1455 | REJCIADDRS(CI_ADDRS, !go->neg_addr && go->old_addrs,
|
---|
| 1456 | go->ouraddr, go->hisaddr);
|
---|
| 1457 |
|
---|
| 1458 | #if VJ_SUPPORT
|
---|
| 1459 | REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
|
---|
| 1460 | go->maxslotindex, go->cflag);
|
---|
| 1461 | #endif /* VJ_SUPPORT */
|
---|
| 1462 |
|
---|
| 1463 | REJCIADDR(CI_ADDR, neg_addr, go->ouraddr);
|
---|
| 1464 |
|
---|
| 1465 | #if LWIP_DNS
|
---|
| 1466 | REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
|
---|
| 1467 |
|
---|
| 1468 | REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
|
---|
| 1469 | #endif /* LWIP_DNS */
|
---|
| 1470 |
|
---|
| 1471 | #if 0 /* UNUSED - WINS */
|
---|
| 1472 | REJCIWINS(CI_MS_WINS1, go->winsaddr[0]);
|
---|
| 1473 |
|
---|
| 1474 | REJCIWINS(CI_MS_WINS2, go->winsaddr[1]);
|
---|
| 1475 | #endif /* UNUSED - WINS */
|
---|
| 1476 |
|
---|
| 1477 | /*
|
---|
| 1478 | * If there are any remaining CIs, then this packet is bad.
|
---|
| 1479 | */
|
---|
| 1480 | if (len != 0)
|
---|
| 1481 | goto bad;
|
---|
| 1482 | /*
|
---|
| 1483 | * Now we can update state.
|
---|
| 1484 | */
|
---|
| 1485 | if (f->state != PPP_FSM_OPENED)
|
---|
| 1486 | *go = try_;
|
---|
| 1487 | return 1;
|
---|
| 1488 |
|
---|
| 1489 | bad:
|
---|
| 1490 | IPCPDEBUG(("ipcp_rejci: received bad Reject!"));
|
---|
| 1491 | return 0;
|
---|
| 1492 | }
|
---|
| 1493 |
|
---|
| 1494 |
|
---|
| 1495 | /*
|
---|
| 1496 | * ipcp_reqci - Check the peer's requested CIs and send appropriate response.
|
---|
| 1497 | * Callback from fsm_rconfreq, Receive Configure Request
|
---|
| 1498 | *
|
---|
| 1499 | * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
|
---|
| 1500 | * appropriately. If reject_if_disagree is non-zero, doesn't return
|
---|
| 1501 | * CONFNAK; returns CONFREJ if it can't return CONFACK.
|
---|
| 1502 | *
|
---|
| 1503 | * inp = Requested CIs
|
---|
| 1504 | * len = Length of requested CIs
|
---|
| 1505 | */
|
---|
| 1506 | static int ipcp_reqci(fsm *f, u_char *inp, int *len, int reject_if_disagree) {
|
---|
| 1507 | ppp_pcb *pcb = f->pcb;
|
---|
| 1508 | ipcp_options *wo = &pcb->ipcp_wantoptions;
|
---|
| 1509 | ipcp_options *ho = &pcb->ipcp_hisoptions;
|
---|
| 1510 | ipcp_options *ao = &pcb->ipcp_allowoptions;
|
---|
| 1511 | u_char *cip, *next; /* Pointer to current and next CIs */
|
---|
| 1512 | u_short cilen, citype; /* Parsed len, type */
|
---|
| 1513 | #if VJ_SUPPORT
|
---|
| 1514 | u_short cishort; /* Parsed short value */
|
---|
| 1515 | #endif /* VJ_SUPPORT */
|
---|
| 1516 | u32_t tl, ciaddr1, ciaddr2;/* Parsed address values */
|
---|
| 1517 | int rc = CONFACK; /* Final packet return code */
|
---|
| 1518 | int orc; /* Individual option return code */
|
---|
| 1519 | u_char *p; /* Pointer to next char to parse */
|
---|
| 1520 | u_char *ucp = inp; /* Pointer to current output char */
|
---|
| 1521 | int l = *len; /* Length left */
|
---|
| 1522 | #if VJ_SUPPORT
|
---|
| 1523 | u_char maxslotindex, cflag;
|
---|
| 1524 | #endif /* VJ_SUPPORT */
|
---|
| 1525 | #if LWIP_DNS
|
---|
| 1526 | int d;
|
---|
| 1527 | #endif /* LWIP_DNS */
|
---|
| 1528 |
|
---|
| 1529 | /*
|
---|
| 1530 | * Reset all his options.
|
---|
| 1531 | */
|
---|
| 1532 | BZERO(ho, sizeof(*ho));
|
---|
| 1533 |
|
---|
| 1534 | /*
|
---|
| 1535 | * Process all his options.
|
---|
| 1536 | */
|
---|
| 1537 | next = inp;
|
---|
| 1538 | while (l) {
|
---|
| 1539 | orc = CONFACK; /* Assume success */
|
---|
| 1540 | cip = p = next; /* Remember begining of CI */
|
---|
| 1541 | if (l < 2 || /* Not enough data for CI header or */
|
---|
| 1542 | p[1] < 2 || /* CI length too small or */
|
---|
| 1543 | p[1] > l) { /* CI length too big? */
|
---|
| 1544 | IPCPDEBUG(("ipcp_reqci: bad CI length!"));
|
---|
| 1545 | orc = CONFREJ; /* Reject bad CI */
|
---|
| 1546 | cilen = l; /* Reject till end of packet */
|
---|
| 1547 | l = 0; /* Don't loop again */
|
---|
| 1548 | goto endswitch;
|
---|
| 1549 | }
|
---|
| 1550 | GETCHAR(citype, p); /* Parse CI type */
|
---|
| 1551 | GETCHAR(cilen, p); /* Parse CI length */
|
---|
| 1552 | l -= cilen; /* Adjust remaining length */
|
---|
| 1553 | next += cilen; /* Step to next CI */
|
---|
| 1554 |
|
---|
| 1555 | switch (citype) { /* Check CI type */
|
---|
| 1556 | case CI_ADDRS:
|
---|
| 1557 | if (!ao->old_addrs || ho->neg_addr ||
|
---|
| 1558 | cilen != CILEN_ADDRS) { /* Check CI length */
|
---|
| 1559 | orc = CONFREJ; /* Reject CI */
|
---|
| 1560 | break;
|
---|
| 1561 | }
|
---|
| 1562 |
|
---|
| 1563 | /*
|
---|
| 1564 | * If he has no address, or if we both have his address but
|
---|
| 1565 | * disagree about it, then NAK it with our idea.
|
---|
| 1566 | * In particular, if we don't know his address, but he does,
|
---|
| 1567 | * then accept it.
|
---|
| 1568 | */
|
---|
| 1569 | GETLONG(tl, p); /* Parse source address (his) */
|
---|
| 1570 | ciaddr1 = lwip_htonl(tl);
|
---|
| 1571 | if (ciaddr1 != wo->hisaddr
|
---|
| 1572 | && (ciaddr1 == 0 || !wo->accept_remote)) {
|
---|
| 1573 | orc = CONFNAK;
|
---|
| 1574 | if (!reject_if_disagree) {
|
---|
| 1575 | DECPTR(sizeof(u32_t), p);
|
---|
| 1576 | tl = lwip_ntohl(wo->hisaddr);
|
---|
| 1577 | PUTLONG(tl, p);
|
---|
| 1578 | }
|
---|
| 1579 | } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
|
---|
| 1580 | /*
|
---|
| 1581 | * If neither we nor he knows his address, reject the option.
|
---|
| 1582 | */
|
---|
| 1583 | orc = CONFREJ;
|
---|
| 1584 | wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
|
---|
| 1585 | break;
|
---|
| 1586 | }
|
---|
| 1587 |
|
---|
| 1588 | /*
|
---|
| 1589 | * If he doesn't know our address, or if we both have our address
|
---|
| 1590 | * but disagree about it, then NAK it with our idea.
|
---|
| 1591 | */
|
---|
| 1592 | GETLONG(tl, p); /* Parse desination address (ours) */
|
---|
| 1593 | ciaddr2 = lwip_htonl(tl);
|
---|
| 1594 | if (ciaddr2 != wo->ouraddr) {
|
---|
| 1595 | if (ciaddr2 == 0 || !wo->accept_local) {
|
---|
| 1596 | orc = CONFNAK;
|
---|
| 1597 | if (!reject_if_disagree) {
|
---|
| 1598 | DECPTR(sizeof(u32_t), p);
|
---|
| 1599 | tl = lwip_ntohl(wo->ouraddr);
|
---|
| 1600 | PUTLONG(tl, p);
|
---|
| 1601 | }
|
---|
| 1602 | } else {
|
---|
| 1603 | wo->ouraddr = ciaddr2; /* accept peer's idea */
|
---|
| 1604 | }
|
---|
| 1605 | }
|
---|
| 1606 |
|
---|
| 1607 | ho->old_addrs = 1;
|
---|
| 1608 | ho->hisaddr = ciaddr1;
|
---|
| 1609 | ho->ouraddr = ciaddr2;
|
---|
| 1610 | break;
|
---|
| 1611 |
|
---|
| 1612 | case CI_ADDR:
|
---|
| 1613 | if (!ao->neg_addr || ho->old_addrs ||
|
---|
| 1614 | cilen != CILEN_ADDR) { /* Check CI length */
|
---|
| 1615 | orc = CONFREJ; /* Reject CI */
|
---|
| 1616 | break;
|
---|
| 1617 | }
|
---|
| 1618 |
|
---|
| 1619 | /*
|
---|
| 1620 | * If he has no address, or if we both have his address but
|
---|
| 1621 | * disagree about it, then NAK it with our idea.
|
---|
| 1622 | * In particular, if we don't know his address, but he does,
|
---|
| 1623 | * then accept it.
|
---|
| 1624 | */
|
---|
| 1625 | GETLONG(tl, p); /* Parse source address (his) */
|
---|
| 1626 | ciaddr1 = lwip_htonl(tl);
|
---|
| 1627 | if (ciaddr1 != wo->hisaddr
|
---|
| 1628 | && (ciaddr1 == 0 || !wo->accept_remote)) {
|
---|
| 1629 | orc = CONFNAK;
|
---|
| 1630 | if (!reject_if_disagree) {
|
---|
| 1631 | DECPTR(sizeof(u32_t), p);
|
---|
| 1632 | tl = lwip_ntohl(wo->hisaddr);
|
---|
| 1633 | PUTLONG(tl, p);
|
---|
| 1634 | }
|
---|
| 1635 | } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
|
---|
| 1636 | /*
|
---|
| 1637 | * Don't ACK an address of 0.0.0.0 - reject it instead.
|
---|
| 1638 | */
|
---|
| 1639 | orc = CONFREJ;
|
---|
| 1640 | wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
|
---|
| 1641 | break;
|
---|
| 1642 | }
|
---|
| 1643 |
|
---|
| 1644 | ho->neg_addr = 1;
|
---|
| 1645 | ho->hisaddr = ciaddr1;
|
---|
| 1646 | break;
|
---|
| 1647 |
|
---|
| 1648 | #if LWIP_DNS
|
---|
| 1649 | case CI_MS_DNS1:
|
---|
| 1650 | case CI_MS_DNS2:
|
---|
| 1651 | /* Microsoft primary or secondary DNS request */
|
---|
| 1652 | d = citype == CI_MS_DNS2;
|
---|
| 1653 |
|
---|
| 1654 | /* If we do not have a DNS address then we cannot send it */
|
---|
| 1655 | if (ao->dnsaddr[d] == 0 ||
|
---|
| 1656 | cilen != CILEN_ADDR) { /* Check CI length */
|
---|
| 1657 | orc = CONFREJ; /* Reject CI */
|
---|
| 1658 | break;
|
---|
| 1659 | }
|
---|
| 1660 | GETLONG(tl, p);
|
---|
| 1661 | if (lwip_htonl(tl) != ao->dnsaddr[d]) {
|
---|
| 1662 | DECPTR(sizeof(u32_t), p);
|
---|
| 1663 | tl = lwip_ntohl(ao->dnsaddr[d]);
|
---|
| 1664 | PUTLONG(tl, p);
|
---|
| 1665 | orc = CONFNAK;
|
---|
| 1666 | }
|
---|
| 1667 | break;
|
---|
| 1668 | #endif /* LWIP_DNS */
|
---|
| 1669 |
|
---|
| 1670 | #if 0 /* UNUSED - WINS */
|
---|
| 1671 | case CI_MS_WINS1:
|
---|
| 1672 | case CI_MS_WINS2:
|
---|
| 1673 | /* Microsoft primary or secondary WINS request */
|
---|
| 1674 | d = citype == CI_MS_WINS2;
|
---|
| 1675 |
|
---|
| 1676 | /* If we do not have a DNS address then we cannot send it */
|
---|
| 1677 | if (ao->winsaddr[d] == 0 ||
|
---|
| 1678 | cilen != CILEN_ADDR) { /* Check CI length */
|
---|
| 1679 | orc = CONFREJ; /* Reject CI */
|
---|
| 1680 | break;
|
---|
| 1681 | }
|
---|
| 1682 | GETLONG(tl, p);
|
---|
| 1683 | if (lwip_htonl(tl) != ao->winsaddr[d]) {
|
---|
| 1684 | DECPTR(sizeof(u32_t), p);
|
---|
| 1685 | tl = lwip_ntohl(ao->winsaddr[d]);
|
---|
| 1686 | PUTLONG(tl, p);
|
---|
| 1687 | orc = CONFNAK;
|
---|
| 1688 | }
|
---|
| 1689 | break;
|
---|
| 1690 | #endif /* UNUSED - WINS */
|
---|
| 1691 |
|
---|
| 1692 | #if VJ_SUPPORT
|
---|
| 1693 | case CI_COMPRESSTYPE:
|
---|
| 1694 | if (!ao->neg_vj ||
|
---|
| 1695 | (cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
|
---|
| 1696 | orc = CONFREJ;
|
---|
| 1697 | break;
|
---|
| 1698 | }
|
---|
| 1699 | GETSHORT(cishort, p);
|
---|
| 1700 |
|
---|
| 1701 | if (!(cishort == IPCP_VJ_COMP ||
|
---|
| 1702 | (cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
|
---|
| 1703 | orc = CONFREJ;
|
---|
| 1704 | break;
|
---|
| 1705 | }
|
---|
| 1706 |
|
---|
| 1707 | ho->neg_vj = 1;
|
---|
| 1708 | ho->vj_protocol = cishort;
|
---|
| 1709 | if (cilen == CILEN_VJ) {
|
---|
| 1710 | GETCHAR(maxslotindex, p);
|
---|
| 1711 | if (maxslotindex > ao->maxslotindex) {
|
---|
| 1712 | orc = CONFNAK;
|
---|
| 1713 | if (!reject_if_disagree){
|
---|
| 1714 | DECPTR(1, p);
|
---|
| 1715 | PUTCHAR(ao->maxslotindex, p);
|
---|
| 1716 | }
|
---|
| 1717 | }
|
---|
| 1718 | GETCHAR(cflag, p);
|
---|
| 1719 | if (cflag && !ao->cflag) {
|
---|
| 1720 | orc = CONFNAK;
|
---|
| 1721 | if (!reject_if_disagree){
|
---|
| 1722 | DECPTR(1, p);
|
---|
| 1723 | PUTCHAR(wo->cflag, p);
|
---|
| 1724 | }
|
---|
| 1725 | }
|
---|
| 1726 | ho->maxslotindex = maxslotindex;
|
---|
| 1727 | ho->cflag = cflag;
|
---|
| 1728 | } else {
|
---|
| 1729 | ho->old_vj = 1;
|
---|
| 1730 | ho->maxslotindex = MAX_STATES - 1;
|
---|
| 1731 | ho->cflag = 1;
|
---|
| 1732 | }
|
---|
| 1733 | break;
|
---|
| 1734 | #endif /* VJ_SUPPORT */
|
---|
| 1735 |
|
---|
| 1736 | default:
|
---|
| 1737 | orc = CONFREJ;
|
---|
| 1738 | break;
|
---|
| 1739 | }
|
---|
| 1740 | endswitch:
|
---|
| 1741 | if (orc == CONFACK && /* Good CI */
|
---|
| 1742 | rc != CONFACK) /* but prior CI wasnt? */
|
---|
| 1743 | continue; /* Don't send this one */
|
---|
| 1744 |
|
---|
| 1745 | if (orc == CONFNAK) { /* Nak this CI? */
|
---|
| 1746 | if (reject_if_disagree) /* Getting fed up with sending NAKs? */
|
---|
| 1747 | orc = CONFREJ; /* Get tough if so */
|
---|
| 1748 | else {
|
---|
| 1749 | if (rc == CONFREJ) /* Rejecting prior CI? */
|
---|
| 1750 | continue; /* Don't send this one */
|
---|
| 1751 | if (rc == CONFACK) { /* Ack'd all prior CIs? */
|
---|
| 1752 | rc = CONFNAK; /* Not anymore... */
|
---|
| 1753 | ucp = inp; /* Backup */
|
---|
| 1754 | }
|
---|
| 1755 | }
|
---|
| 1756 | }
|
---|
| 1757 |
|
---|
| 1758 | if (orc == CONFREJ && /* Reject this CI */
|
---|
| 1759 | rc != CONFREJ) { /* but no prior ones? */
|
---|
| 1760 | rc = CONFREJ;
|
---|
| 1761 | ucp = inp; /* Backup */
|
---|
| 1762 | }
|
---|
| 1763 |
|
---|
| 1764 | /* Need to move CI? */
|
---|
| 1765 | if (ucp != cip)
|
---|
| 1766 | MEMCPY(ucp, cip, cilen); /* Move it */
|
---|
| 1767 |
|
---|
| 1768 | /* Update output pointer */
|
---|
| 1769 | INCPTR(cilen, ucp);
|
---|
| 1770 | }
|
---|
| 1771 |
|
---|
| 1772 | /*
|
---|
| 1773 | * If we aren't rejecting this packet, and we want to negotiate
|
---|
| 1774 | * their address, and they didn't send their address, then we
|
---|
| 1775 | * send a NAK with a CI_ADDR option appended. We assume the
|
---|
| 1776 | * input buffer is long enough that we can append the extra
|
---|
| 1777 | * option safely.
|
---|
| 1778 | */
|
---|
| 1779 | if (rc != CONFREJ && !ho->neg_addr && !ho->old_addrs &&
|
---|
| 1780 | wo->req_addr && !reject_if_disagree && !pcb->settings.noremoteip) {
|
---|
| 1781 | if (rc == CONFACK) {
|
---|
| 1782 | rc = CONFNAK;
|
---|
| 1783 | ucp = inp; /* reset pointer */
|
---|
| 1784 | wo->req_addr = 0; /* don't ask again */
|
---|
| 1785 | }
|
---|
| 1786 | PUTCHAR(CI_ADDR, ucp);
|
---|
| 1787 | PUTCHAR(CILEN_ADDR, ucp);
|
---|
| 1788 | tl = lwip_ntohl(wo->hisaddr);
|
---|
| 1789 | PUTLONG(tl, ucp);
|
---|
| 1790 | }
|
---|
| 1791 |
|
---|
| 1792 | *len = ucp - inp; /* Compute output length */
|
---|
| 1793 | IPCPDEBUG(("ipcp: returning Configure-%s", CODENAME(rc)));
|
---|
| 1794 | return (rc); /* Return final code */
|
---|
| 1795 | }
|
---|
| 1796 |
|
---|
| 1797 |
|
---|
| 1798 | #if 0 /* UNUSED */
|
---|
| 1799 | /*
|
---|
| 1800 | * ip_check_options - check that any IP-related options are OK,
|
---|
| 1801 | * and assign appropriate defaults.
|
---|
| 1802 | */
|
---|
| 1803 | static void
|
---|
| 1804 | ip_check_options()
|
---|
| 1805 | {
|
---|
| 1806 | struct hostent *hp;
|
---|
| 1807 | u32_t local;
|
---|
| 1808 | ipcp_options *wo = &ipcp_wantoptions[0];
|
---|
| 1809 |
|
---|
| 1810 | /*
|
---|
| 1811 | * Default our local IP address based on our hostname.
|
---|
| 1812 | * If local IP address already given, don't bother.
|
---|
| 1813 | */
|
---|
| 1814 | if (wo->ouraddr == 0 && !disable_defaultip) {
|
---|
| 1815 | /*
|
---|
| 1816 | * Look up our hostname (possibly with domain name appended)
|
---|
| 1817 | * and take the first IP address as our local IP address.
|
---|
| 1818 | * If there isn't an IP address for our hostname, too bad.
|
---|
| 1819 | */
|
---|
| 1820 | wo->accept_local = 1; /* don't insist on this default value */
|
---|
| 1821 | if ((hp = gethostbyname(hostname)) != NULL) {
|
---|
| 1822 | local = *(u32_t *)hp->h_addr;
|
---|
| 1823 | if (local != 0 && !bad_ip_adrs(local))
|
---|
| 1824 | wo->ouraddr = local;
|
---|
| 1825 | }
|
---|
| 1826 | }
|
---|
| 1827 | ask_for_local = wo->ouraddr != 0 || !disable_defaultip;
|
---|
| 1828 | }
|
---|
| 1829 | #endif /* UNUSED */
|
---|
| 1830 |
|
---|
| 1831 | #if DEMAND_SUPPORT
|
---|
| 1832 | /*
|
---|
| 1833 | * ip_demand_conf - configure the interface as though
|
---|
| 1834 | * IPCP were up, for use with dial-on-demand.
|
---|
| 1835 | */
|
---|
| 1836 | static int
|
---|
| 1837 | ip_demand_conf(u)
|
---|
| 1838 | int u;
|
---|
| 1839 | {
|
---|
| 1840 | ppp_pcb *pcb = &ppp_pcb_list[u];
|
---|
| 1841 | ipcp_options *wo = &ipcp_wantoptions[u];
|
---|
| 1842 |
|
---|
| 1843 | if (wo->hisaddr == 0 && !pcb->settings.noremoteip) {
|
---|
| 1844 | /* make up an arbitrary address for the peer */
|
---|
| 1845 | wo->hisaddr = lwip_htonl(0x0a707070 + ifunit);
|
---|
| 1846 | wo->accept_remote = 1;
|
---|
| 1847 | }
|
---|
| 1848 | if (wo->ouraddr == 0) {
|
---|
| 1849 | /* make up an arbitrary address for us */
|
---|
| 1850 | wo->ouraddr = lwip_htonl(0x0a404040 + ifunit);
|
---|
| 1851 | wo->accept_local = 1;
|
---|
| 1852 | ask_for_local = 0; /* don't tell the peer this address */
|
---|
| 1853 | }
|
---|
| 1854 | if (!sifaddr(pcb, wo->ouraddr, wo->hisaddr, get_mask(wo->ouraddr)))
|
---|
| 1855 | return 0;
|
---|
| 1856 | if (!sifup(pcb))
|
---|
| 1857 | return 0;
|
---|
| 1858 | if (!sifnpmode(pcb, PPP_IP, NPMODE_QUEUE))
|
---|
| 1859 | return 0;
|
---|
| 1860 | #if 0 /* UNUSED */
|
---|
| 1861 | if (wo->default_route)
|
---|
| 1862 | if (sifdefaultroute(pcb, wo->ouraddr, wo->hisaddr,
|
---|
| 1863 | wo->replace_default_route))
|
---|
| 1864 | default_route_set[u] = 1;
|
---|
| 1865 | #endif /* UNUSED */
|
---|
| 1866 | #if 0 /* UNUSED - PROXY ARP */
|
---|
| 1867 | if (wo->proxy_arp)
|
---|
| 1868 | if (sifproxyarp(pcb, wo->hisaddr))
|
---|
| 1869 | proxy_arp_set[u] = 1;
|
---|
| 1870 | #endif /* UNUSED - PROXY ARP */
|
---|
| 1871 |
|
---|
| 1872 | ppp_notice("local IP address %I", wo->ouraddr);
|
---|
| 1873 | if (wo->hisaddr)
|
---|
| 1874 | ppp_notice("remote IP address %I", wo->hisaddr);
|
---|
| 1875 |
|
---|
| 1876 | return 1;
|
---|
| 1877 | }
|
---|
| 1878 | #endif /* DEMAND_SUPPORT */
|
---|
| 1879 |
|
---|
| 1880 | /*
|
---|
| 1881 | * ipcp_up - IPCP has come UP.
|
---|
| 1882 | *
|
---|
| 1883 | * Configure the IP network interface appropriately and bring it up.
|
---|
| 1884 | */
|
---|
| 1885 | static void ipcp_up(fsm *f) {
|
---|
| 1886 | ppp_pcb *pcb = f->pcb;
|
---|
| 1887 | u32_t mask;
|
---|
| 1888 | ipcp_options *ho = &pcb->ipcp_hisoptions;
|
---|
| 1889 | ipcp_options *go = &pcb->ipcp_gotoptions;
|
---|
| 1890 | ipcp_options *wo = &pcb->ipcp_wantoptions;
|
---|
| 1891 |
|
---|
| 1892 | IPCPDEBUG(("ipcp: up"));
|
---|
| 1893 |
|
---|
| 1894 | /*
|
---|
| 1895 | * We must have a non-zero IP address for both ends of the link.
|
---|
| 1896 | */
|
---|
| 1897 | if (!ho->neg_addr && !ho->old_addrs)
|
---|
| 1898 | ho->hisaddr = wo->hisaddr;
|
---|
| 1899 |
|
---|
| 1900 | if (!(go->neg_addr || go->old_addrs) && (wo->neg_addr || wo->old_addrs)
|
---|
| 1901 | && wo->ouraddr != 0) {
|
---|
| 1902 | ppp_error("Peer refused to agree to our IP address");
|
---|
| 1903 | ipcp_close(f->pcb, "Refused our IP address");
|
---|
| 1904 | return;
|
---|
| 1905 | }
|
---|
| 1906 | if (go->ouraddr == 0) {
|
---|
| 1907 | ppp_error("Could not determine local IP address");
|
---|
| 1908 | ipcp_close(f->pcb, "Could not determine local IP address");
|
---|
| 1909 | return;
|
---|
| 1910 | }
|
---|
| 1911 | if (ho->hisaddr == 0 && !pcb->settings.noremoteip) {
|
---|
| 1912 | ho->hisaddr = lwip_htonl(0x0a404040);
|
---|
| 1913 | ppp_warn("Could not determine remote IP address: defaulting to %I",
|
---|
| 1914 | ho->hisaddr);
|
---|
| 1915 | }
|
---|
| 1916 | #if 0 /* UNUSED */
|
---|
| 1917 | script_setenv("IPLOCAL", ip_ntoa(go->ouraddr), 0);
|
---|
| 1918 | if (ho->hisaddr != 0)
|
---|
| 1919 | script_setenv("IPREMOTE", ip_ntoa(ho->hisaddr), 1);
|
---|
| 1920 | #endif /* UNUSED */
|
---|
| 1921 |
|
---|
| 1922 | #if LWIP_DNS
|
---|
| 1923 | if (!go->req_dns1)
|
---|
| 1924 | go->dnsaddr[0] = 0;
|
---|
| 1925 | if (!go->req_dns2)
|
---|
| 1926 | go->dnsaddr[1] = 0;
|
---|
| 1927 | #if 0 /* UNUSED */
|
---|
| 1928 | if (go->dnsaddr[0])
|
---|
| 1929 | script_setenv("DNS1", ip_ntoa(go->dnsaddr[0]), 0);
|
---|
| 1930 | if (go->dnsaddr[1])
|
---|
| 1931 | script_setenv("DNS2", ip_ntoa(go->dnsaddr[1]), 0);
|
---|
| 1932 | #endif /* UNUSED */
|
---|
| 1933 | if (pcb->settings.usepeerdns && (go->dnsaddr[0] || go->dnsaddr[1])) {
|
---|
| 1934 | sdns(pcb, go->dnsaddr[0], go->dnsaddr[1]);
|
---|
| 1935 | #if 0 /* UNUSED */
|
---|
| 1936 | script_setenv("USEPEERDNS", "1", 0);
|
---|
| 1937 | create_resolv(go->dnsaddr[0], go->dnsaddr[1]);
|
---|
| 1938 | #endif /* UNUSED */
|
---|
| 1939 | }
|
---|
| 1940 | #endif /* LWIP_DNS */
|
---|
| 1941 |
|
---|
| 1942 | /*
|
---|
| 1943 | * Check that the peer is allowed to use the IP address it wants.
|
---|
| 1944 | */
|
---|
| 1945 | if (ho->hisaddr != 0) {
|
---|
| 1946 | u32_t addr = lwip_ntohl(ho->hisaddr);
|
---|
| 1947 | if ((addr >> IP_CLASSA_NSHIFT) == IP_LOOPBACKNET
|
---|
| 1948 | || IP_MULTICAST(addr) || IP_BADCLASS(addr)
|
---|
| 1949 | /*
|
---|
| 1950 | * For now, consider that PPP in server mode with peer required
|
---|
| 1951 | * to authenticate must provide the peer IP address, reject any
|
---|
| 1952 | * IP address wanted by peer different than the one we wanted.
|
---|
| 1953 | */
|
---|
| 1954 | #if PPP_SERVER && PPP_AUTH_SUPPORT
|
---|
| 1955 | || (pcb->settings.auth_required && wo->hisaddr != ho->hisaddr)
|
---|
| 1956 | #endif /* PPP_SERVER && PPP_AUTH_SUPPORT */
|
---|
| 1957 | ) {
|
---|
| 1958 | ppp_error("Peer is not authorized to use remote address %I", ho->hisaddr);
|
---|
| 1959 | ipcp_close(pcb, "Unauthorized remote IP address");
|
---|
| 1960 | return;
|
---|
| 1961 | }
|
---|
| 1962 | }
|
---|
| 1963 | #if 0 /* Unused */
|
---|
| 1964 | /* Upstream checking code */
|
---|
| 1965 | if (ho->hisaddr != 0 && !auth_ip_addr(f->unit, ho->hisaddr)) {
|
---|
| 1966 | ppp_error("Peer is not authorized to use remote address %I", ho->hisaddr);
|
---|
| 1967 | ipcp_close(f->unit, "Unauthorized remote IP address");
|
---|
| 1968 | return;
|
---|
| 1969 | }
|
---|
| 1970 | #endif /* Unused */
|
---|
| 1971 |
|
---|
| 1972 | #if VJ_SUPPORT
|
---|
| 1973 | /* set tcp compression */
|
---|
| 1974 | sifvjcomp(pcb, ho->neg_vj, ho->cflag, ho->maxslotindex);
|
---|
| 1975 | #endif /* VJ_SUPPORT */
|
---|
| 1976 |
|
---|
| 1977 | #if DEMAND_SUPPORT
|
---|
| 1978 | /*
|
---|
| 1979 | * If we are doing dial-on-demand, the interface is already
|
---|
| 1980 | * configured, so we put out any saved-up packets, then set the
|
---|
| 1981 | * interface to pass IP packets.
|
---|
| 1982 | */
|
---|
| 1983 | if (demand) {
|
---|
| 1984 | if (go->ouraddr != wo->ouraddr || ho->hisaddr != wo->hisaddr) {
|
---|
| 1985 | ipcp_clear_addrs(f->unit, wo->ouraddr, wo->hisaddr,
|
---|
| 1986 | wo->replace_default_route);
|
---|
| 1987 | if (go->ouraddr != wo->ouraddr) {
|
---|
| 1988 | ppp_warn("Local IP address changed to %I", go->ouraddr);
|
---|
| 1989 | script_setenv("OLDIPLOCAL", ip_ntoa(wo->ouraddr), 0);
|
---|
| 1990 | wo->ouraddr = go->ouraddr;
|
---|
| 1991 | } else
|
---|
| 1992 | script_unsetenv("OLDIPLOCAL");
|
---|
| 1993 | if (ho->hisaddr != wo->hisaddr && wo->hisaddr != 0) {
|
---|
| 1994 | ppp_warn("Remote IP address changed to %I", ho->hisaddr);
|
---|
| 1995 | script_setenv("OLDIPREMOTE", ip_ntoa(wo->hisaddr), 0);
|
---|
| 1996 | wo->hisaddr = ho->hisaddr;
|
---|
| 1997 | } else
|
---|
| 1998 | script_unsetenv("OLDIPREMOTE");
|
---|
| 1999 |
|
---|
| 2000 | /* Set the interface to the new addresses */
|
---|
| 2001 | mask = get_mask(go->ouraddr);
|
---|
| 2002 | if (!sifaddr(pcb, go->ouraddr, ho->hisaddr, mask)) {
|
---|
| 2003 | #if PPP_DEBUG
|
---|
| 2004 | ppp_warn("Interface configuration failed");
|
---|
| 2005 | #endif /* PPP_DEBUG */
|
---|
| 2006 | ipcp_close(f->unit, "Interface configuration failed");
|
---|
| 2007 | return;
|
---|
| 2008 | }
|
---|
| 2009 |
|
---|
| 2010 | /* assign a default route through the interface if required */
|
---|
| 2011 | if (ipcp_wantoptions[f->unit].default_route)
|
---|
| 2012 | if (sifdefaultroute(pcb, go->ouraddr, ho->hisaddr,
|
---|
| 2013 | wo->replace_default_route))
|
---|
| 2014 | default_route_set[f->unit] = 1;
|
---|
| 2015 |
|
---|
| 2016 | #if 0 /* UNUSED - PROXY ARP */
|
---|
| 2017 | /* Make a proxy ARP entry if requested. */
|
---|
| 2018 | if (ho->hisaddr != 0 && ipcp_wantoptions[f->unit].proxy_arp)
|
---|
| 2019 | if (sifproxyarp(pcb, ho->hisaddr))
|
---|
| 2020 | proxy_arp_set[f->unit] = 1;
|
---|
| 2021 | #endif /* UNUSED - PROXY ARP */
|
---|
| 2022 |
|
---|
| 2023 | }
|
---|
| 2024 | demand_rexmit(PPP_IP,go->ouraddr);
|
---|
| 2025 | sifnpmode(pcb, PPP_IP, NPMODE_PASS);
|
---|
| 2026 |
|
---|
| 2027 | } else
|
---|
| 2028 | #endif /* DEMAND_SUPPORT */
|
---|
| 2029 | {
|
---|
| 2030 | /*
|
---|
| 2031 | * Set IP addresses and (if specified) netmask.
|
---|
| 2032 | */
|
---|
| 2033 | mask = get_mask(go->ouraddr);
|
---|
| 2034 |
|
---|
| 2035 | #if !(defined(SVR4) && (defined(SNI) || defined(__USLC__)))
|
---|
| 2036 | if (!sifaddr(pcb, go->ouraddr, ho->hisaddr, mask)) {
|
---|
| 2037 | #if PPP_DEBUG
|
---|
| 2038 | ppp_warn("Interface configuration failed");
|
---|
| 2039 | #endif /* PPP_DEBUG */
|
---|
| 2040 | ipcp_close(f->pcb, "Interface configuration failed");
|
---|
| 2041 | return;
|
---|
| 2042 | }
|
---|
| 2043 | #endif
|
---|
| 2044 |
|
---|
| 2045 | /* bring the interface up for IP */
|
---|
| 2046 | if (!sifup(pcb)) {
|
---|
| 2047 | #if PPP_DEBUG
|
---|
| 2048 | ppp_warn("Interface failed to come up");
|
---|
| 2049 | #endif /* PPP_DEBUG */
|
---|
| 2050 | ipcp_close(f->pcb, "Interface configuration failed");
|
---|
| 2051 | return;
|
---|
| 2052 | }
|
---|
| 2053 |
|
---|
| 2054 | #if (defined(SVR4) && (defined(SNI) || defined(__USLC__)))
|
---|
| 2055 | if (!sifaddr(pcb, go->ouraddr, ho->hisaddr, mask)) {
|
---|
| 2056 | #if PPP_DEBUG
|
---|
| 2057 | ppp_warn("Interface configuration failed");
|
---|
| 2058 | #endif /* PPP_DEBUG */
|
---|
| 2059 | ipcp_close(f->unit, "Interface configuration failed");
|
---|
| 2060 | return;
|
---|
| 2061 | }
|
---|
| 2062 | #endif
|
---|
| 2063 | #if DEMAND_SUPPORT
|
---|
| 2064 | sifnpmode(pcb, PPP_IP, NPMODE_PASS);
|
---|
| 2065 | #endif /* DEMAND_SUPPORT */
|
---|
| 2066 |
|
---|
| 2067 | #if 0 /* UNUSED */
|
---|
| 2068 | /* assign a default route through the interface if required */
|
---|
| 2069 | if (wo->default_route)
|
---|
| 2070 | if (sifdefaultroute(pcb, go->ouraddr, ho->hisaddr,
|
---|
| 2071 | wo->replace_default_route))
|
---|
| 2072 | pcb->default_route_set = 1;
|
---|
| 2073 | #endif /* UNUSED */
|
---|
| 2074 |
|
---|
| 2075 | #if 0 /* UNUSED - PROXY ARP */
|
---|
| 2076 | /* Make a proxy ARP entry if requested. */
|
---|
| 2077 | if (ho->hisaddr != 0 && wo->proxy_arp)
|
---|
| 2078 | if (sifproxyarp(pcb, ho->hisaddr))
|
---|
| 2079 | pcb->proxy_arp_set = 1;
|
---|
| 2080 | #endif /* UNUSED - PROXY ARP */
|
---|
| 2081 |
|
---|
| 2082 | wo->ouraddr = go->ouraddr;
|
---|
| 2083 |
|
---|
| 2084 | ppp_notice("local IP address %I", go->ouraddr);
|
---|
| 2085 | if (ho->hisaddr != 0)
|
---|
| 2086 | ppp_notice("remote IP address %I", ho->hisaddr);
|
---|
| 2087 | #if LWIP_DNS
|
---|
| 2088 | if (go->dnsaddr[0])
|
---|
| 2089 | ppp_notice("primary DNS address %I", go->dnsaddr[0]);
|
---|
| 2090 | if (go->dnsaddr[1])
|
---|
| 2091 | ppp_notice("secondary DNS address %I", go->dnsaddr[1]);
|
---|
| 2092 | #endif /* LWIP_DNS */
|
---|
| 2093 | }
|
---|
| 2094 |
|
---|
| 2095 | #if PPP_STATS_SUPPORT
|
---|
| 2096 | reset_link_stats(f->unit);
|
---|
| 2097 | #endif /* PPP_STATS_SUPPORT */
|
---|
| 2098 |
|
---|
| 2099 | np_up(pcb, PPP_IP);
|
---|
| 2100 | pcb->ipcp_is_up = 1;
|
---|
| 2101 |
|
---|
| 2102 | #if PPP_NOTIFY
|
---|
| 2103 | notify(ip_up_notifier, 0);
|
---|
| 2104 | #endif /* PPP_NOTIFY */
|
---|
| 2105 | #if 0 /* UNUSED */
|
---|
| 2106 | if (ip_up_hook)
|
---|
| 2107 | ip_up_hook();
|
---|
| 2108 | #endif /* UNUSED */
|
---|
| 2109 | }
|
---|
| 2110 |
|
---|
| 2111 |
|
---|
| 2112 | /*
|
---|
| 2113 | * ipcp_down - IPCP has gone DOWN.
|
---|
| 2114 | *
|
---|
| 2115 | * Take the IP network interface down, clear its addresses
|
---|
| 2116 | * and delete routes through it.
|
---|
| 2117 | */
|
---|
| 2118 | static void ipcp_down(fsm *f) {
|
---|
| 2119 | ppp_pcb *pcb = f->pcb;
|
---|
| 2120 | ipcp_options *ho = &pcb->ipcp_hisoptions;
|
---|
| 2121 | ipcp_options *go = &pcb->ipcp_gotoptions;
|
---|
| 2122 |
|
---|
| 2123 | IPCPDEBUG(("ipcp: down"));
|
---|
| 2124 | #if PPP_STATS_SUPPORT
|
---|
| 2125 | /* XXX a bit IPv4-centric here, we only need to get the stats
|
---|
| 2126 | * before the interface is marked down. */
|
---|
| 2127 | /* XXX more correct: we must get the stats before running the notifiers,
|
---|
| 2128 | * at least for the radius plugin */
|
---|
| 2129 | update_link_stats(f->unit);
|
---|
| 2130 | #endif /* PPP_STATS_SUPPORT */
|
---|
| 2131 | #if PPP_NOTIFY
|
---|
| 2132 | notify(ip_down_notifier, 0);
|
---|
| 2133 | #endif /* PPP_NOTIFY */
|
---|
| 2134 | #if 0 /* UNUSED */
|
---|
| 2135 | if (ip_down_hook)
|
---|
| 2136 | ip_down_hook();
|
---|
| 2137 | #endif /* UNUSED */
|
---|
| 2138 | if (pcb->ipcp_is_up) {
|
---|
| 2139 | pcb->ipcp_is_up = 0;
|
---|
| 2140 | np_down(pcb, PPP_IP);
|
---|
| 2141 | }
|
---|
| 2142 | #if VJ_SUPPORT
|
---|
| 2143 | sifvjcomp(pcb, 0, 0, 0);
|
---|
| 2144 | #endif /* VJ_SUPPORT */
|
---|
| 2145 |
|
---|
| 2146 | #if PPP_STATS_SUPPORT
|
---|
| 2147 | print_link_stats(); /* _after_ running the notifiers and ip_down_hook(),
|
---|
| 2148 | * because print_link_stats() sets link_stats_valid
|
---|
| 2149 | * to 0 (zero) */
|
---|
| 2150 | #endif /* PPP_STATS_SUPPORT */
|
---|
| 2151 |
|
---|
| 2152 | #if DEMAND_SUPPORT
|
---|
| 2153 | /*
|
---|
| 2154 | * If we are doing dial-on-demand, set the interface
|
---|
| 2155 | * to queue up outgoing packets (for now).
|
---|
| 2156 | */
|
---|
| 2157 | if (demand) {
|
---|
| 2158 | sifnpmode(pcb, PPP_IP, NPMODE_QUEUE);
|
---|
| 2159 | } else
|
---|
| 2160 | #endif /* DEMAND_SUPPORT */
|
---|
| 2161 | {
|
---|
| 2162 | #if DEMAND_SUPPORT
|
---|
| 2163 | sifnpmode(pcb, PPP_IP, NPMODE_DROP);
|
---|
| 2164 | #endif /* DEMAND_SUPPORT */
|
---|
| 2165 | sifdown(pcb);
|
---|
| 2166 | ipcp_clear_addrs(pcb, go->ouraddr,
|
---|
| 2167 | ho->hisaddr, 0);
|
---|
| 2168 | #if LWIP_DNS
|
---|
| 2169 | cdns(pcb, go->dnsaddr[0], go->dnsaddr[1]);
|
---|
| 2170 | #endif /* LWIP_DNS */
|
---|
| 2171 | }
|
---|
| 2172 | }
|
---|
| 2173 |
|
---|
| 2174 |
|
---|
| 2175 | /*
|
---|
| 2176 | * ipcp_clear_addrs() - clear the interface addresses, routes,
|
---|
| 2177 | * proxy arp entries, etc.
|
---|
| 2178 | */
|
---|
| 2179 | static void ipcp_clear_addrs(ppp_pcb *pcb, u32_t ouraddr, u32_t hisaddr, u8_t replacedefaultroute) {
|
---|
| 2180 | LWIP_UNUSED_ARG(replacedefaultroute);
|
---|
| 2181 |
|
---|
| 2182 | #if 0 /* UNUSED - PROXY ARP */
|
---|
| 2183 | if (pcb->proxy_arp_set) {
|
---|
| 2184 | cifproxyarp(pcb, hisaddr);
|
---|
| 2185 | pcb->proxy_arp_set = 0;
|
---|
| 2186 | }
|
---|
| 2187 | #endif /* UNUSED - PROXY ARP */
|
---|
| 2188 | #if 0 /* UNUSED */
|
---|
| 2189 | /* If replacedefaultroute, sifdefaultroute will be called soon
|
---|
| 2190 | * with replacedefaultroute set and that will overwrite the current
|
---|
| 2191 | * default route. This is the case only when doing demand, otherwise
|
---|
| 2192 | * during demand, this cifdefaultroute would restore the old default
|
---|
| 2193 | * route which is not what we want in this case. In the non-demand
|
---|
| 2194 | * case, we'll delete the default route and restore the old if there
|
---|
| 2195 | * is one saved by an sifdefaultroute with replacedefaultroute.
|
---|
| 2196 | */
|
---|
| 2197 | if (!replacedefaultroute && pcb->default_route_set) {
|
---|
| 2198 | cifdefaultroute(pcb, ouraddr, hisaddr);
|
---|
| 2199 | pcb->default_route_set = 0;
|
---|
| 2200 | }
|
---|
| 2201 | #endif /* UNUSED */
|
---|
| 2202 | cifaddr(pcb, ouraddr, hisaddr);
|
---|
| 2203 | }
|
---|
| 2204 |
|
---|
| 2205 |
|
---|
| 2206 | /*
|
---|
| 2207 | * ipcp_finished - possibly shut down the lower layers.
|
---|
| 2208 | */
|
---|
| 2209 | static void ipcp_finished(fsm *f) {
|
---|
| 2210 | ppp_pcb *pcb = f->pcb;
|
---|
| 2211 | if (pcb->ipcp_is_open) {
|
---|
| 2212 | pcb->ipcp_is_open = 0;
|
---|
| 2213 | np_finished(pcb, PPP_IP);
|
---|
| 2214 | }
|
---|
| 2215 | }
|
---|
| 2216 |
|
---|
| 2217 |
|
---|
| 2218 | #if 0 /* UNUSED */
|
---|
| 2219 | /*
|
---|
| 2220 | * create_resolv - create the replacement resolv.conf file
|
---|
| 2221 | */
|
---|
| 2222 | static void
|
---|
| 2223 | create_resolv(peerdns1, peerdns2)
|
---|
| 2224 | u32_t peerdns1, peerdns2;
|
---|
| 2225 | {
|
---|
| 2226 |
|
---|
| 2227 | }
|
---|
| 2228 | #endif /* UNUSED */
|
---|
| 2229 |
|
---|
| 2230 | #if PRINTPKT_SUPPORT
|
---|
| 2231 | /*
|
---|
| 2232 | * ipcp_printpkt - print the contents of an IPCP packet.
|
---|
| 2233 | */
|
---|
| 2234 | static const char* const ipcp_codenames[] = {
|
---|
| 2235 | "ConfReq", "ConfAck", "ConfNak", "ConfRej",
|
---|
| 2236 | "TermReq", "TermAck", "CodeRej"
|
---|
| 2237 | };
|
---|
| 2238 |
|
---|
| 2239 | static int ipcp_printpkt(const u_char *p, int plen,
|
---|
| 2240 | void (*printer) (void *, const char *, ...), void *arg) {
|
---|
| 2241 | int code, id, len, olen;
|
---|
| 2242 | const u_char *pstart, *optend;
|
---|
| 2243 | #if VJ_SUPPORT
|
---|
| 2244 | u_short cishort;
|
---|
| 2245 | #endif /* VJ_SUPPORT */
|
---|
| 2246 | u32_t cilong;
|
---|
| 2247 |
|
---|
| 2248 | if (plen < HEADERLEN)
|
---|
| 2249 | return 0;
|
---|
| 2250 | pstart = p;
|
---|
| 2251 | GETCHAR(code, p);
|
---|
| 2252 | GETCHAR(id, p);
|
---|
| 2253 | GETSHORT(len, p);
|
---|
| 2254 | if (len < HEADERLEN || len > plen)
|
---|
| 2255 | return 0;
|
---|
| 2256 |
|
---|
| 2257 | if (code >= 1 && code <= (int)LWIP_ARRAYSIZE(ipcp_codenames))
|
---|
| 2258 | printer(arg, " %s", ipcp_codenames[code-1]);
|
---|
| 2259 | else
|
---|
| 2260 | printer(arg, " code=0x%x", code);
|
---|
| 2261 | printer(arg, " id=0x%x", id);
|
---|
| 2262 | len -= HEADERLEN;
|
---|
| 2263 | switch (code) {
|
---|
| 2264 | case CONFREQ:
|
---|
| 2265 | case CONFACK:
|
---|
| 2266 | case CONFNAK:
|
---|
| 2267 | case CONFREJ:
|
---|
| 2268 | /* print option list */
|
---|
| 2269 | while (len >= 2) {
|
---|
| 2270 | GETCHAR(code, p);
|
---|
| 2271 | GETCHAR(olen, p);
|
---|
| 2272 | p -= 2;
|
---|
| 2273 | if (olen < 2 || olen > len) {
|
---|
| 2274 | break;
|
---|
| 2275 | }
|
---|
| 2276 | printer(arg, " <");
|
---|
| 2277 | len -= olen;
|
---|
| 2278 | optend = p + olen;
|
---|
| 2279 | switch (code) {
|
---|
| 2280 | case CI_ADDRS:
|
---|
| 2281 | if (olen == CILEN_ADDRS) {
|
---|
| 2282 | p += 2;
|
---|
| 2283 | GETLONG(cilong, p);
|
---|
| 2284 | printer(arg, "addrs %I", lwip_htonl(cilong));
|
---|
| 2285 | GETLONG(cilong, p);
|
---|
| 2286 | printer(arg, " %I", lwip_htonl(cilong));
|
---|
| 2287 | }
|
---|
| 2288 | break;
|
---|
| 2289 | #if VJ_SUPPORT
|
---|
| 2290 | case CI_COMPRESSTYPE:
|
---|
| 2291 | if (olen >= CILEN_COMPRESS) {
|
---|
| 2292 | p += 2;
|
---|
| 2293 | GETSHORT(cishort, p);
|
---|
| 2294 | printer(arg, "compress ");
|
---|
| 2295 | switch (cishort) {
|
---|
| 2296 | case IPCP_VJ_COMP:
|
---|
| 2297 | printer(arg, "VJ");
|
---|
| 2298 | break;
|
---|
| 2299 | case IPCP_VJ_COMP_OLD:
|
---|
| 2300 | printer(arg, "old-VJ");
|
---|
| 2301 | break;
|
---|
| 2302 | default:
|
---|
| 2303 | printer(arg, "0x%x", cishort);
|
---|
| 2304 | }
|
---|
| 2305 | }
|
---|
| 2306 | break;
|
---|
| 2307 | #endif /* VJ_SUPPORT */
|
---|
| 2308 | case CI_ADDR:
|
---|
| 2309 | if (olen == CILEN_ADDR) {
|
---|
| 2310 | p += 2;
|
---|
| 2311 | GETLONG(cilong, p);
|
---|
| 2312 | printer(arg, "addr %I", lwip_htonl(cilong));
|
---|
| 2313 | }
|
---|
| 2314 | break;
|
---|
| 2315 | #if LWIP_DNS
|
---|
| 2316 | case CI_MS_DNS1:
|
---|
| 2317 | case CI_MS_DNS2:
|
---|
| 2318 | p += 2;
|
---|
| 2319 | GETLONG(cilong, p);
|
---|
| 2320 | printer(arg, "ms-dns%d %I", (code == CI_MS_DNS1? 1: 2),
|
---|
| 2321 | htonl(cilong));
|
---|
| 2322 | break;
|
---|
| 2323 | #endif /* LWIP_DNS */
|
---|
| 2324 | #if 0 /* UNUSED - WINS */
|
---|
| 2325 | case CI_MS_WINS1:
|
---|
| 2326 | case CI_MS_WINS2:
|
---|
| 2327 | p += 2;
|
---|
| 2328 | GETLONG(cilong, p);
|
---|
| 2329 | printer(arg, "ms-wins %I", lwip_htonl(cilong));
|
---|
| 2330 | break;
|
---|
| 2331 | #endif /* UNUSED - WINS */
|
---|
| 2332 | default:
|
---|
| 2333 | break;
|
---|
| 2334 | }
|
---|
| 2335 | while (p < optend) {
|
---|
| 2336 | GETCHAR(code, p);
|
---|
| 2337 | printer(arg, " %.2x", code);
|
---|
| 2338 | }
|
---|
| 2339 | printer(arg, ">");
|
---|
| 2340 | }
|
---|
| 2341 | break;
|
---|
| 2342 |
|
---|
| 2343 | case TERMACK:
|
---|
| 2344 | case TERMREQ:
|
---|
| 2345 | if (len > 0 && *p >= ' ' && *p < 0x7f) {
|
---|
| 2346 | printer(arg, " ");
|
---|
| 2347 | ppp_print_string(p, len, printer, arg);
|
---|
| 2348 | p += len;
|
---|
| 2349 | len = 0;
|
---|
| 2350 | }
|
---|
| 2351 | break;
|
---|
| 2352 | default:
|
---|
| 2353 | break;
|
---|
| 2354 | }
|
---|
| 2355 |
|
---|
| 2356 | /* print the rest of the bytes in the packet */
|
---|
| 2357 | for (; len > 0; --len) {
|
---|
| 2358 | GETCHAR(code, p);
|
---|
| 2359 | printer(arg, " %.2x", code);
|
---|
| 2360 | }
|
---|
| 2361 |
|
---|
| 2362 | return p - pstart;
|
---|
| 2363 | }
|
---|
| 2364 | #endif /* PRINTPKT_SUPPORT */
|
---|
| 2365 |
|
---|
| 2366 | #if DEMAND_SUPPORT
|
---|
| 2367 | /*
|
---|
| 2368 | * ip_active_pkt - see if this IP packet is worth bringing the link up for.
|
---|
| 2369 | * We don't bring the link up for IP fragments or for TCP FIN packets
|
---|
| 2370 | * with no data.
|
---|
| 2371 | */
|
---|
| 2372 | #define IP_HDRLEN 20 /* bytes */
|
---|
| 2373 | #define IP_OFFMASK 0x1fff
|
---|
| 2374 | #ifndef IPPROTO_TCP
|
---|
| 2375 | #define IPPROTO_TCP 6
|
---|
| 2376 | #endif
|
---|
| 2377 | #define TCP_HDRLEN 20
|
---|
| 2378 | #define TH_FIN 0x01
|
---|
| 2379 |
|
---|
| 2380 | /*
|
---|
| 2381 | * We use these macros because the IP header may be at an odd address,
|
---|
| 2382 | * and some compilers might use word loads to get th_off or ip_hl.
|
---|
| 2383 | */
|
---|
| 2384 |
|
---|
| 2385 | #define net_short(x) (((x)[0] << 8) + (x)[1])
|
---|
| 2386 | #define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
|
---|
| 2387 | #define get_ipoff(x) net_short((unsigned char *)(x) + 6)
|
---|
| 2388 | #define get_ipproto(x) (((unsigned char *)(x))[9])
|
---|
| 2389 | #define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
|
---|
| 2390 | #define get_tcpflags(x) (((unsigned char *)(x))[13])
|
---|
| 2391 |
|
---|
| 2392 | static int
|
---|
| 2393 | ip_active_pkt(pkt, len)
|
---|
| 2394 | u_char *pkt;
|
---|
| 2395 | int len;
|
---|
| 2396 | {
|
---|
| 2397 | u_char *tcp;
|
---|
| 2398 | int hlen;
|
---|
| 2399 |
|
---|
| 2400 | len -= PPP_HDRLEN;
|
---|
| 2401 | pkt += PPP_HDRLEN;
|
---|
| 2402 | if (len < IP_HDRLEN)
|
---|
| 2403 | return 0;
|
---|
| 2404 | if ((get_ipoff(pkt) & IP_OFFMASK) != 0)
|
---|
| 2405 | return 0;
|
---|
| 2406 | if (get_ipproto(pkt) != IPPROTO_TCP)
|
---|
| 2407 | return 1;
|
---|
| 2408 | hlen = get_iphl(pkt) * 4;
|
---|
| 2409 | if (len < hlen + TCP_HDRLEN)
|
---|
| 2410 | return 0;
|
---|
| 2411 | tcp = pkt + hlen;
|
---|
| 2412 | if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4)
|
---|
| 2413 | return 0;
|
---|
| 2414 | return 1;
|
---|
| 2415 | }
|
---|
| 2416 | #endif /* DEMAND_SUPPORT */
|
---|
| 2417 |
|
---|
| 2418 | #endif /* PPP_SUPPORT && PPP_IPV4_SUPPORT */
|
---|