[457] | 1 | /*
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| 2 | * multilink.c - support routines for multilink.
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| 3 | *
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| 4 | * Copyright (c) 2000-2002 Paul Mackerras. 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. The name(s) of the authors of this software must not be used to
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| 14 | * endorse or promote products derived from this software without
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| 15 | * prior written permission.
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| 16 | *
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| 17 | * 3. Redistributions of any form whatsoever must retain the following
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| 18 | * acknowledgment:
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| 19 | * "This product includes software developed by Paul Mackerras
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| 20 | * <paulus@samba.org>".
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| 21 | *
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| 22 | * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
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| 23 | * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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| 24 | * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
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| 25 | * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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| 26 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
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| 27 | * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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| 28 | * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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| 29 | */
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| 30 |
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| 31 | #include "netif/ppp/ppp_opts.h"
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| 32 | #if PPP_SUPPORT && defined(HAVE_MULTILINK) /* don't build if not configured for use in lwipopts.h */
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| 33 |
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| 34 | /* Multilink support
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| 35 | *
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| 36 | * Multilink uses Samba TDB (Trivial Database Library), which
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| 37 | * we cannot port, because it needs a filesystem.
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| 38 | *
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| 39 | * We have to choose between doing a memory-shared TDB-clone,
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| 40 | * or dropping multilink support at all.
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| 41 | */
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| 42 |
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| 43 | #include <string.h>
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| 44 | #include <ctype.h>
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| 45 | #include <stdlib.h>
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| 46 | #include <netdb.h>
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| 47 | #include <errno.h>
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| 48 | #include <signal.h>
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| 49 | #include <netinet/in.h>
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| 50 | #include <unistd.h>
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| 51 |
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| 52 | #include "netif/ppp/ppp_impl.h"
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| 53 |
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| 54 | #include "netif/ppp/fsm.h"
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| 55 | #include "netif/ppp/lcp.h"
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| 56 | #include "netif/ppp/tdb.h"
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| 57 |
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| 58 | bool endpoint_specified; /* user gave explicit endpoint discriminator */
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| 59 | char *bundle_id; /* identifier for our bundle */
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| 60 | char *blinks_id; /* key for the list of links */
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| 61 | bool doing_multilink; /* multilink was enabled and agreed to */
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| 62 | bool multilink_master; /* we own the multilink bundle */
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| 63 |
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| 64 | extern TDB_CONTEXT *pppdb;
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| 65 | extern char db_key[];
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| 66 |
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| 67 | static void make_bundle_links (int append);
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| 68 | static void remove_bundle_link (void);
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| 69 | static void iterate_bundle_links (void (*func) (char *));
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| 70 |
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| 71 | static int get_default_epdisc (struct epdisc *);
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| 72 | static int parse_num (char *str, const char *key, int *valp);
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| 73 | static int owns_unit (TDB_DATA pid, int unit);
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| 74 |
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| 75 | #define set_ip_epdisc(ep, addr) do { \
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| 76 | ep->length = 4; \
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| 77 | ep->value[0] = addr >> 24; \
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| 78 | ep->value[1] = addr >> 16; \
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| 79 | ep->value[2] = addr >> 8; \
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| 80 | ep->value[3] = addr; \
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| 81 | } while (0)
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| 82 |
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| 83 | #define LOCAL_IP_ADDR(addr) \
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| 84 | (((addr) & 0xff000000) == 0x0a000000 /* 10.x.x.x */ \
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| 85 | || ((addr) & 0xfff00000) == 0xac100000 /* 172.16.x.x */ \
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| 86 | || ((addr) & 0xffff0000) == 0xc0a80000) /* 192.168.x.x */
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| 87 |
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| 88 | #define process_exists(n) (kill((n), 0) == 0 || errno != ESRCH)
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| 89 |
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| 90 | void
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| 91 | mp_check_options()
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| 92 | {
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| 93 | lcp_options *wo = &lcp_wantoptions[0];
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| 94 | lcp_options *ao = &lcp_allowoptions[0];
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| 95 |
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| 96 | doing_multilink = 0;
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| 97 | if (!multilink)
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| 98 | return;
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| 99 | /* if we're doing multilink, we have to negotiate MRRU */
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| 100 | if (!wo->neg_mrru) {
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| 101 | /* mrru not specified, default to mru */
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| 102 | wo->mrru = wo->mru;
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| 103 | wo->neg_mrru = 1;
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| 104 | }
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| 105 | ao->mrru = ao->mru;
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| 106 | ao->neg_mrru = 1;
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| 107 |
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| 108 | if (!wo->neg_endpoint && !noendpoint) {
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| 109 | /* get a default endpoint value */
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| 110 | wo->neg_endpoint = get_default_epdisc(&wo->endpoint);
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| 111 | }
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| 112 | }
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| 113 |
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| 114 | /*
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| 115 | * Make a new bundle or join us to an existing bundle
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| 116 | * if we are doing multilink.
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| 117 | */
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| 118 | int
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| 119 | mp_join_bundle()
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| 120 | {
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| 121 | lcp_options *go = &lcp_gotoptions[0];
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| 122 | lcp_options *ho = &lcp_hisoptions[0];
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| 123 | lcp_options *ao = &lcp_allowoptions[0];
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| 124 | int unit, pppd_pid;
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| 125 | int l, mtu;
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| 126 | char *p;
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| 127 | TDB_DATA key, pid, rec;
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| 128 |
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| 129 | if (doing_multilink) {
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| 130 | /* have previously joined a bundle */
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| 131 | if (!go->neg_mrru || !ho->neg_mrru) {
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| 132 | notice("oops, didn't get multilink on renegotiation");
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| 133 | lcp_close(pcb, "multilink required");
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| 134 | return 0;
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| 135 | }
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| 136 | /* XXX should check the peer_authname and ho->endpoint
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| 137 | are the same as previously */
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| 138 | return 0;
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| 139 | }
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| 140 |
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| 141 | if (!go->neg_mrru || !ho->neg_mrru) {
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| 142 | /* not doing multilink */
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| 143 | if (go->neg_mrru)
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| 144 | notice("oops, multilink negotiated only for receive");
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| 145 | mtu = ho->neg_mru? ho->mru: PPP_MRU;
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| 146 | if (mtu > ao->mru)
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| 147 | mtu = ao->mru;
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| 148 | if (demand) {
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| 149 | /* already have a bundle */
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| 150 | cfg_bundle(0, 0, 0, 0);
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| 151 | netif_set_mtu(pcb, mtu);
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| 152 | return 0;
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| 153 | }
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| 154 | make_new_bundle(0, 0, 0, 0);
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| 155 | set_ifunit(1);
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| 156 | netif_set_mtu(pcb, mtu);
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| 157 | return 0;
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| 158 | }
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| 159 |
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| 160 | doing_multilink = 1;
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| 161 |
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| 162 | /*
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| 163 | * Find the appropriate bundle or join a new one.
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| 164 | * First we make up a name for the bundle.
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| 165 | * The length estimate is worst-case assuming every
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| 166 | * character has to be quoted.
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| 167 | */
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| 168 | l = 4 * strlen(peer_authname) + 10;
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| 169 | if (ho->neg_endpoint)
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| 170 | l += 3 * ho->endpoint.length + 8;
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| 171 | if (bundle_name)
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| 172 | l += 3 * strlen(bundle_name) + 2;
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| 173 | bundle_id = malloc(l);
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| 174 | if (bundle_id == 0)
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| 175 | novm("bundle identifier");
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| 176 |
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| 177 | p = bundle_id;
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| 178 | p += slprintf(p, l-1, "BUNDLE=\"%q\"", peer_authname);
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| 179 | if (ho->neg_endpoint || bundle_name)
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| 180 | *p++ = '/';
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| 181 | if (ho->neg_endpoint)
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| 182 | p += slprintf(p, bundle_id+l-p, "%s",
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| 183 | epdisc_to_str(&ho->endpoint));
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| 184 | if (bundle_name)
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| 185 | p += slprintf(p, bundle_id+l-p, "/%v", bundle_name);
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| 186 |
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| 187 | /* Make the key for the list of links belonging to the bundle */
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| 188 | l = p - bundle_id;
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| 189 | blinks_id = malloc(l + 7);
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| 190 | if (blinks_id == NULL)
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| 191 | novm("bundle links key");
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| 192 | slprintf(blinks_id, l + 7, "BUNDLE_LINKS=%s", bundle_id + 7);
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| 193 |
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| 194 | /*
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| 195 | * For demand mode, we only need to configure the bundle
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| 196 | * and attach the link.
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| 197 | */
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| 198 | mtu = LWIP_MIN(ho->mrru, ao->mru);
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| 199 | if (demand) {
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| 200 | cfg_bundle(go->mrru, ho->mrru, go->neg_ssnhf, ho->neg_ssnhf);
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| 201 | netif_set_mtu(pcb, mtu);
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| 202 | script_setenv("BUNDLE", bundle_id + 7, 1);
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| 203 | return 0;
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| 204 | }
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| 205 |
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| 206 | /*
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| 207 | * Check if the bundle ID is already in the database.
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| 208 | */
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| 209 | unit = -1;
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| 210 | lock_db();
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| 211 | key.dptr = bundle_id;
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| 212 | key.dsize = p - bundle_id;
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| 213 | pid = tdb_fetch(pppdb, key);
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| 214 | if (pid.dptr != NULL) {
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| 215 | /* bundle ID exists, see if the pppd record exists */
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| 216 | rec = tdb_fetch(pppdb, pid);
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| 217 | if (rec.dptr != NULL && rec.dsize > 0) {
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| 218 | /* make sure the string is null-terminated */
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| 219 | rec.dptr[rec.dsize-1] = 0;
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| 220 | /* parse the interface number */
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| 221 | parse_num(rec.dptr, "IFNAME=ppp", &unit);
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| 222 | /* check the pid value */
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| 223 | if (!parse_num(rec.dptr, "PPPD_PID=", &pppd_pid)
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| 224 | || !process_exists(pppd_pid)
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| 225 | || !owns_unit(pid, unit))
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| 226 | unit = -1;
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| 227 | free(rec.dptr);
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| 228 | }
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| 229 | free(pid.dptr);
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| 230 | }
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| 231 |
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| 232 | if (unit >= 0) {
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| 233 | /* attach to existing unit */
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| 234 | if (bundle_attach(unit)) {
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| 235 | set_ifunit(0);
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| 236 | script_setenv("BUNDLE", bundle_id + 7, 0);
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| 237 | make_bundle_links(1);
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| 238 | unlock_db();
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| 239 | info("Link attached to %s", ifname);
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| 240 | return 1;
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| 241 | }
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| 242 | /* attach failed because bundle doesn't exist */
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| 243 | }
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| 244 |
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| 245 | /* we have to make a new bundle */
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| 246 | make_new_bundle(go->mrru, ho->mrru, go->neg_ssnhf, ho->neg_ssnhf);
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| 247 | set_ifunit(1);
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| 248 | netif_set_mtu(pcb, mtu);
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| 249 | script_setenv("BUNDLE", bundle_id + 7, 1);
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| 250 | make_bundle_links(pcb);
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| 251 | unlock_db();
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| 252 | info("New bundle %s created", ifname);
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| 253 | multilink_master = 1;
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| 254 | return 0;
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| 255 | }
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| 256 |
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| 257 | void mp_exit_bundle()
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| 258 | {
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| 259 | lock_db();
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| 260 | remove_bundle_link();
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| 261 | unlock_db();
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| 262 | }
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| 263 |
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| 264 | static void sendhup(char *str)
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| 265 | {
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| 266 | int pid;
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| 267 |
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| 268 | if (parse_num(str, "PPPD_PID=", &pid) && pid != getpid()) {
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| 269 | if (debug)
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| 270 | dbglog("sending SIGHUP to process %d", pid);
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| 271 | kill(pid, SIGHUP);
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| 272 | }
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| 273 | }
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| 274 |
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| 275 | void mp_bundle_terminated()
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| 276 | {
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| 277 | TDB_DATA key;
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| 278 |
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| 279 | bundle_terminating = 1;
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| 280 | upper_layers_down(pcb);
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| 281 | notice("Connection terminated.");
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| 282 | #if PPP_STATS_SUPPORT
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| 283 | print_link_stats();
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| 284 | #endif /* PPP_STATS_SUPPORT */
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| 285 | if (!demand) {
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| 286 | remove_pidfiles();
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| 287 | script_unsetenv("IFNAME");
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| 288 | }
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| 289 |
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| 290 | lock_db();
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| 291 | destroy_bundle();
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| 292 | iterate_bundle_links(sendhup);
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| 293 | key.dptr = blinks_id;
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| 294 | key.dsize = strlen(blinks_id);
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| 295 | tdb_delete(pppdb, key);
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| 296 | unlock_db();
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| 297 |
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| 298 | new_phase(PPP_PHASE_DEAD);
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| 299 |
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| 300 | doing_multilink = 0;
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| 301 | multilink_master = 0;
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| 302 | }
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| 303 |
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| 304 | static void make_bundle_links(int append)
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| 305 | {
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| 306 | TDB_DATA key, rec;
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| 307 | char *p;
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| 308 | char entry[32];
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| 309 | int l;
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| 310 |
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| 311 | key.dptr = blinks_id;
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| 312 | key.dsize = strlen(blinks_id);
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| 313 | slprintf(entry, sizeof(entry), "%s;", db_key);
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| 314 | p = entry;
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| 315 | if (append) {
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| 316 | rec = tdb_fetch(pppdb, key);
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| 317 | if (rec.dptr != NULL && rec.dsize > 0) {
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| 318 | rec.dptr[rec.dsize-1] = 0;
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| 319 | if (strstr(rec.dptr, db_key) != NULL) {
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| 320 | /* already in there? strange */
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| 321 | warn("link entry already exists in tdb");
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| 322 | return;
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| 323 | }
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| 324 | l = rec.dsize + strlen(entry);
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| 325 | p = malloc(l);
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| 326 | if (p == NULL)
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| 327 | novm("bundle link list");
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| 328 | slprintf(p, l, "%s%s", rec.dptr, entry);
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| 329 | } else {
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| 330 | warn("bundle link list not found");
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| 331 | }
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| 332 | if (rec.dptr != NULL)
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| 333 | free(rec.dptr);
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| 334 | }
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| 335 | rec.dptr = p;
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| 336 | rec.dsize = strlen(p) + 1;
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| 337 | if (tdb_store(pppdb, key, rec, TDB_REPLACE))
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| 338 | error("couldn't %s bundle link list",
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| 339 | append? "update": "create");
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| 340 | if (p != entry)
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| 341 | free(p);
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| 342 | }
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| 343 |
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| 344 | static void remove_bundle_link()
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| 345 | {
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| 346 | TDB_DATA key, rec;
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| 347 | char entry[32];
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| 348 | char *p, *q;
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| 349 | int l;
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| 350 |
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| 351 | key.dptr = blinks_id;
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| 352 | key.dsize = strlen(blinks_id);
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| 353 | slprintf(entry, sizeof(entry), "%s;", db_key);
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| 354 |
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| 355 | rec = tdb_fetch(pppdb, key);
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| 356 | if (rec.dptr == NULL || rec.dsize <= 0) {
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| 357 | if (rec.dptr != NULL)
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| 358 | free(rec.dptr);
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| 359 | return;
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| 360 | }
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| 361 | rec.dptr[rec.dsize-1] = 0;
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| 362 | p = strstr(rec.dptr, entry);
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| 363 | if (p != NULL) {
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| 364 | q = p + strlen(entry);
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| 365 | l = strlen(q) + 1;
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| 366 | memmove(p, q, l);
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| 367 | rec.dsize = p - rec.dptr + l;
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| 368 | if (tdb_store(pppdb, key, rec, TDB_REPLACE))
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| 369 | error("couldn't update bundle link list (removal)");
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| 370 | }
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| 371 | free(rec.dptr);
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| 372 | }
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| 373 |
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| 374 | static void iterate_bundle_links(void (*func)(char *))
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| 375 | {
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| 376 | TDB_DATA key, rec, pp;
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| 377 | char *p, *q;
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| 378 |
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| 379 | key.dptr = blinks_id;
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| 380 | key.dsize = strlen(blinks_id);
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| 381 | rec = tdb_fetch(pppdb, key);
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| 382 | if (rec.dptr == NULL || rec.dsize <= 0) {
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| 383 | error("bundle link list not found (iterating list)");
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| 384 | if (rec.dptr != NULL)
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| 385 | free(rec.dptr);
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| 386 | return;
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| 387 | }
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| 388 | p = rec.dptr;
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| 389 | p[rec.dsize-1] = 0;
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| 390 | while ((q = strchr(p, ';')) != NULL) {
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| 391 | *q = 0;
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| 392 | key.dptr = p;
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| 393 | key.dsize = q - p;
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| 394 | pp = tdb_fetch(pppdb, key);
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| 395 | if (pp.dptr != NULL && pp.dsize > 0) {
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| 396 | pp.dptr[pp.dsize-1] = 0;
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| 397 | func(pp.dptr);
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| 398 | }
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| 399 | if (pp.dptr != NULL)
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| 400 | free(pp.dptr);
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| 401 | p = q + 1;
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| 402 | }
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| 403 | free(rec.dptr);
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| 404 | }
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| 405 |
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| 406 | static int
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| 407 | parse_num(str, key, valp)
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| 408 | char *str;
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| 409 | const char *key;
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| 410 | int *valp;
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| 411 | {
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| 412 | char *p, *endp;
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| 413 | int i;
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| 414 |
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| 415 | p = strstr(str, key);
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| 416 | if (p != 0) {
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| 417 | p += strlen(key);
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| 418 | i = strtol(p, &endp, 10);
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| 419 | if (endp != p && (*endp == 0 || *endp == ';')) {
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| 420 | *valp = i;
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| 421 | return 1;
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| 422 | }
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| 423 | }
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| 424 | return 0;
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| 425 | }
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| 426 |
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| 427 | /*
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| 428 | * Check whether the pppd identified by `key' still owns ppp unit `unit'.
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| 429 | */
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| 430 | static int
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| 431 | owns_unit(key, unit)
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| 432 | TDB_DATA key;
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| 433 | int unit;
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| 434 | {
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| 435 | char ifkey[32];
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| 436 | TDB_DATA kd, vd;
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| 437 | int ret = 0;
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| 438 |
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| 439 | slprintf(ifkey, sizeof(ifkey), "IFNAME=ppp%d", unit);
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| 440 | kd.dptr = ifkey;
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| 441 | kd.dsize = strlen(ifkey);
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| 442 | vd = tdb_fetch(pppdb, kd);
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| 443 | if (vd.dptr != NULL) {
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| 444 | ret = vd.dsize == key.dsize
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| 445 | && memcmp(vd.dptr, key.dptr, vd.dsize) == 0;
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| 446 | free(vd.dptr);
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| 447 | }
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| 448 | return ret;
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| 449 | }
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| 450 |
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| 451 | static int
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| 452 | get_default_epdisc(ep)
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| 453 | struct epdisc *ep;
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| 454 | {
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| 455 | char *p;
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| 456 | struct hostent *hp;
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| 457 | u32_t addr;
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| 458 |
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| 459 | /* First try for an ethernet MAC address */
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| 460 | p = get_first_ethernet();
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| 461 | if (p != 0 && get_if_hwaddr(ep->value, p) >= 0) {
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| 462 | ep->class = EPD_MAC;
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| 463 | ep->length = 6;
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| 464 | return 1;
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| 465 | }
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| 466 |
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| 467 | /* see if our hostname corresponds to a reasonable IP address */
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| 468 | hp = gethostbyname(hostname);
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| 469 | if (hp != NULL) {
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| 470 | addr = *(u32_t *)hp->h_addr;
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| 471 | if (!bad_ip_adrs(addr)) {
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| 472 | addr = lwip_ntohl(addr);
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| 473 | if (!LOCAL_IP_ADDR(addr)) {
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| 474 | ep->class = EPD_IP;
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| 475 | set_ip_epdisc(ep, addr);
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| 476 | return 1;
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| 477 | }
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| 478 | }
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| 479 | }
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| 480 |
|
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| 481 | return 0;
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| 482 | }
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| 483 |
|
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| 484 | /*
|
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| 485 | * epdisc_to_str - make a printable string from an endpoint discriminator.
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| 486 | */
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| 487 |
|
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| 488 | static char *endp_class_names[] = {
|
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| 489 | "null", "local", "IP", "MAC", "magic", "phone"
|
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| 490 | };
|
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| 491 |
|
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| 492 | char *
|
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| 493 | epdisc_to_str(ep)
|
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| 494 | struct epdisc *ep;
|
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| 495 | {
|
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| 496 | static char str[MAX_ENDP_LEN*3+8];
|
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| 497 | u_char *p = ep->value;
|
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| 498 | int i, mask = 0;
|
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| 499 | char *q, c, c2;
|
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| 500 |
|
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| 501 | if (ep->class == EPD_NULL && ep->length == 0)
|
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| 502 | return "null";
|
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| 503 | if (ep->class == EPD_IP && ep->length == 4) {
|
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| 504 | u32_t addr;
|
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| 505 |
|
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| 506 | GETLONG(addr, p);
|
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| 507 | slprintf(str, sizeof(str), "IP:%I", lwip_htonl(addr));
|
---|
| 508 | return str;
|
---|
| 509 | }
|
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| 510 |
|
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| 511 | c = ':';
|
---|
| 512 | c2 = '.';
|
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| 513 | if (ep->class == EPD_MAC && ep->length == 6)
|
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| 514 | c2 = ':';
|
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| 515 | else if (ep->class == EPD_MAGIC && (ep->length % 4) == 0)
|
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| 516 | mask = 3;
|
---|
| 517 | q = str;
|
---|
| 518 | if (ep->class <= EPD_PHONENUM)
|
---|
| 519 | q += slprintf(q, sizeof(str)-1, "%s",
|
---|
| 520 | endp_class_names[ep->class]);
|
---|
| 521 | else
|
---|
| 522 | q += slprintf(q, sizeof(str)-1, "%d", ep->class);
|
---|
| 523 | c = ':';
|
---|
| 524 | for (i = 0; i < ep->length && i < MAX_ENDP_LEN; ++i) {
|
---|
| 525 | if ((i & mask) == 0) {
|
---|
| 526 | *q++ = c;
|
---|
| 527 | c = c2;
|
---|
| 528 | }
|
---|
| 529 | q += slprintf(q, str + sizeof(str) - q, "%.2x", ep->value[i]);
|
---|
| 530 | }
|
---|
| 531 | return str;
|
---|
| 532 | }
|
---|
| 533 |
|
---|
| 534 | static int hexc_val(int c)
|
---|
| 535 | {
|
---|
| 536 | if (c >= 'a')
|
---|
| 537 | return c - 'a' + 10;
|
---|
| 538 | if (c >= 'A')
|
---|
| 539 | return c - 'A' + 10;
|
---|
| 540 | return c - '0';
|
---|
| 541 | }
|
---|
| 542 |
|
---|
| 543 | int
|
---|
| 544 | str_to_epdisc(ep, str)
|
---|
| 545 | struct epdisc *ep;
|
---|
| 546 | char *str;
|
---|
| 547 | {
|
---|
| 548 | int i, l;
|
---|
| 549 | char *p, *endp;
|
---|
| 550 |
|
---|
| 551 | for (i = EPD_NULL; i <= EPD_PHONENUM; ++i) {
|
---|
| 552 | int sl = strlen(endp_class_names[i]);
|
---|
| 553 | if (strncasecmp(str, endp_class_names[i], sl) == 0) {
|
---|
| 554 | str += sl;
|
---|
| 555 | break;
|
---|
| 556 | }
|
---|
| 557 | }
|
---|
| 558 | if (i > EPD_PHONENUM) {
|
---|
| 559 | /* not a class name, try a decimal class number */
|
---|
| 560 | i = strtol(str, &endp, 10);
|
---|
| 561 | if (endp == str)
|
---|
| 562 | return 0; /* can't parse class number */
|
---|
| 563 | str = endp;
|
---|
| 564 | }
|
---|
| 565 | ep->class = i;
|
---|
| 566 | if (*str == 0) {
|
---|
| 567 | ep->length = 0;
|
---|
| 568 | return 1;
|
---|
| 569 | }
|
---|
| 570 | if (*str != ':' && *str != '.')
|
---|
| 571 | return 0;
|
---|
| 572 | ++str;
|
---|
| 573 |
|
---|
| 574 | if (i == EPD_IP) {
|
---|
| 575 | u32_t addr;
|
---|
| 576 | i = parse_dotted_ip(str, &addr);
|
---|
| 577 | if (i == 0 || str[i] != 0)
|
---|
| 578 | return 0;
|
---|
| 579 | set_ip_epdisc(ep, addr);
|
---|
| 580 | return 1;
|
---|
| 581 | }
|
---|
| 582 | if (i == EPD_MAC && get_if_hwaddr(ep->value, str) >= 0) {
|
---|
| 583 | ep->length = 6;
|
---|
| 584 | return 1;
|
---|
| 585 | }
|
---|
| 586 |
|
---|
| 587 | p = str;
|
---|
| 588 | for (l = 0; l < MAX_ENDP_LEN; ++l) {
|
---|
| 589 | if (*str == 0)
|
---|
| 590 | break;
|
---|
| 591 | if (p <= str)
|
---|
| 592 | for (p = str; isxdigit(*p); ++p)
|
---|
| 593 | ;
|
---|
| 594 | i = p - str;
|
---|
| 595 | if (i == 0)
|
---|
| 596 | return 0;
|
---|
| 597 | ep->value[l] = hexc_val(*str++);
|
---|
| 598 | if ((i & 1) == 0)
|
---|
| 599 | ep->value[l] = (ep->value[l] << 4) + hexc_val(*str++);
|
---|
| 600 | if (*str == ':' || *str == '.')
|
---|
| 601 | ++str;
|
---|
| 602 | }
|
---|
| 603 | if (*str != 0 || (ep->class == EPD_MAC && l != 6))
|
---|
| 604 | return 0;
|
---|
| 605 | ep->length = l;
|
---|
| 606 | return 1;
|
---|
| 607 | }
|
---|
| 608 |
|
---|
| 609 | #endif /* PPP_SUPPORT && HAVE_MULTILINK */
|
---|