[337] | 1 | /***************************************************************************
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| 2 | * _ _ ____ _
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| 3 | * Project ___| | | | _ \| |
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| 4 | * / __| | | | |_) | |
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| 5 | * | (__| |_| | _ <| |___
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| 6 | * \___|\___/|_| \_\_____|
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| 7 | *
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| 8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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| 9 | *
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| 10 | * This software is licensed as described in the file COPYING, which
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| 11 | * you should have received as part of this distribution. The terms
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| 12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 13 | *
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| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 15 | * copies of the Software, and permit persons to whom the Software is
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| 16 | * furnished to do so, under the terms of the COPYING file.
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| 17 | *
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| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 19 | * KIND, either express or implied.
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| 20 | *
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| 21 | ***************************************************************************/
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| 22 |
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| 23 | #include "curl_setup.h"
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| 24 |
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| 25 | #ifndef CURL_DISABLE_TELNET
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| 26 |
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| 27 | #ifdef HAVE_NETINET_IN_H
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| 28 | #include <netinet/in.h>
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| 29 | #endif
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| 30 | #ifdef HAVE_NETDB_H
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| 31 | #include <netdb.h>
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| 32 | #endif
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| 33 | #ifdef HAVE_ARPA_INET_H
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| 34 | #include <arpa/inet.h>
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| 35 | #endif
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| 36 | #ifdef HAVE_NET_IF_H
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| 37 | #include <net/if.h>
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| 38 | #endif
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| 39 | #ifdef HAVE_SYS_IOCTL_H
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| 40 | #include <sys/ioctl.h>
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| 41 | #endif
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| 42 |
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| 43 | #ifdef HAVE_SYS_PARAM_H
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| 44 | #include <sys/param.h>
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| 45 | #endif
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| 46 |
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| 47 | #include "urldata.h"
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| 48 | #include <curl/curl.h>
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| 49 | #include "transfer.h"
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| 50 | #include "sendf.h"
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| 51 | #include "telnet.h"
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| 52 | #include "connect.h"
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| 53 | #include "progress.h"
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| 54 | #include "system_win32.h"
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| 55 |
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| 56 | #define TELOPTS
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| 57 | #define TELCMDS
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| 58 |
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| 59 | #include "arpa_telnet.h"
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| 60 | #include "select.h"
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| 61 | #include "strcase.h"
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| 62 | #include "warnless.h"
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| 63 |
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| 64 | /* The last 3 #include files should be in this order */
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| 65 | #include "curl_printf.h"
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| 66 | #include "curl_memory.h"
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| 67 | #include "memdebug.h"
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| 68 |
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| 69 | #define SUBBUFSIZE 512
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| 70 |
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| 71 | #define CURL_SB_CLEAR(x) x->subpointer = x->subbuffer
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| 72 | #define CURL_SB_TERM(x) \
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| 73 | do { \
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| 74 | x->subend = x->subpointer; \
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| 75 | CURL_SB_CLEAR(x); \
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| 76 | } WHILE_FALSE
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| 77 | #define CURL_SB_ACCUM(x,c) \
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| 78 | do { \
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| 79 | if(x->subpointer < (x->subbuffer + sizeof x->subbuffer)) \
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| 80 | *x->subpointer++ = (c); \
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| 81 | } WHILE_FALSE
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| 82 |
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| 83 | #define CURL_SB_GET(x) ((*x->subpointer++)&0xff)
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| 84 | #define CURL_SB_LEN(x) (x->subend - x->subpointer)
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| 85 |
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| 86 | /* For posterity:
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| 87 | #define CURL_SB_PEEK(x) ((*x->subpointer)&0xff)
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| 88 | #define CURL_SB_EOF(x) (x->subpointer >= x->subend) */
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| 89 |
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| 90 | #ifdef CURL_DISABLE_VERBOSE_STRINGS
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| 91 | #define printoption(a,b,c,d) Curl_nop_stmt
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| 92 | #endif
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| 93 |
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| 94 | #ifdef USE_WINSOCK
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| 95 | typedef FARPROC WSOCK2_FUNC;
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| 96 | static CURLcode check_wsock2(struct Curl_easy *data);
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| 97 | #endif
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| 98 |
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| 99 | static
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| 100 | CURLcode telrcv(struct connectdata *,
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| 101 | const unsigned char *inbuf, /* Data received from socket */
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| 102 | ssize_t count); /* Number of bytes received */
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| 103 |
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| 104 | #ifndef CURL_DISABLE_VERBOSE_STRINGS
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| 105 | static void printoption(struct Curl_easy *data,
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| 106 | const char *direction,
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| 107 | int cmd, int option);
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| 108 | #endif
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| 109 |
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| 110 | static void negotiate(struct connectdata *);
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| 111 | static void send_negotiation(struct connectdata *, int cmd, int option);
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| 112 | static void set_local_option(struct connectdata *, int cmd, int option);
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| 113 | static void set_remote_option(struct connectdata *, int cmd, int option);
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| 114 |
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| 115 | static void printsub(struct Curl_easy *data,
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| 116 | int direction, unsigned char *pointer,
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| 117 | size_t length);
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| 118 | static void suboption(struct connectdata *);
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| 119 | static void sendsuboption(struct connectdata *conn, int option);
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| 120 |
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| 121 | static CURLcode telnet_do(struct connectdata *conn, bool *done);
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| 122 | static CURLcode telnet_done(struct connectdata *conn,
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| 123 | CURLcode, bool premature);
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| 124 | static CURLcode send_telnet_data(struct connectdata *conn,
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| 125 | char *buffer, ssize_t nread);
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| 126 |
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| 127 | /* For negotiation compliant to RFC 1143 */
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| 128 | #define CURL_NO 0
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| 129 | #define CURL_YES 1
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| 130 | #define CURL_WANTYES 2
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| 131 | #define CURL_WANTNO 3
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| 132 |
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| 133 | #define CURL_EMPTY 0
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| 134 | #define CURL_OPPOSITE 1
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| 135 |
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| 136 | /*
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| 137 | * Telnet receiver states for fsm
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| 138 | */
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| 139 | typedef enum
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| 140 | {
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| 141 | CURL_TS_DATA = 0,
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| 142 | CURL_TS_IAC,
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| 143 | CURL_TS_WILL,
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| 144 | CURL_TS_WONT,
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| 145 | CURL_TS_DO,
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| 146 | CURL_TS_DONT,
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| 147 | CURL_TS_CR,
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| 148 | CURL_TS_SB, /* sub-option collection */
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| 149 | CURL_TS_SE /* looking for sub-option end */
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| 150 | } TelnetReceive;
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| 151 |
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| 152 | struct TELNET {
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| 153 | int please_negotiate;
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| 154 | int already_negotiated;
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| 155 | int us[256];
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| 156 | int usq[256];
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| 157 | int us_preferred[256];
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| 158 | int him[256];
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| 159 | int himq[256];
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| 160 | int him_preferred[256];
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| 161 | int subnegotiation[256];
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| 162 | char subopt_ttype[32]; /* Set with suboption TTYPE */
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| 163 | char subopt_xdisploc[128]; /* Set with suboption XDISPLOC */
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| 164 | unsigned short subopt_wsx; /* Set with suboption NAWS */
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| 165 | unsigned short subopt_wsy; /* Set with suboption NAWS */
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| 166 | struct curl_slist *telnet_vars; /* Environment variables */
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| 167 |
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| 168 | /* suboptions */
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| 169 | unsigned char subbuffer[SUBBUFSIZE];
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| 170 | unsigned char *subpointer, *subend; /* buffer for sub-options */
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| 171 |
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| 172 | TelnetReceive telrcv_state;
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| 173 | };
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| 174 |
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| 175 |
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| 176 | /*
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| 177 | * TELNET protocol handler.
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| 178 | */
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| 179 |
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| 180 | const struct Curl_handler Curl_handler_telnet = {
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| 181 | "TELNET", /* scheme */
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| 182 | ZERO_NULL, /* setup_connection */
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| 183 | telnet_do, /* do_it */
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| 184 | telnet_done, /* done */
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| 185 | ZERO_NULL, /* do_more */
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| 186 | ZERO_NULL, /* connect_it */
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| 187 | ZERO_NULL, /* connecting */
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| 188 | ZERO_NULL, /* doing */
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| 189 | ZERO_NULL, /* proto_getsock */
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| 190 | ZERO_NULL, /* doing_getsock */
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| 191 | ZERO_NULL, /* domore_getsock */
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| 192 | ZERO_NULL, /* perform_getsock */
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| 193 | ZERO_NULL, /* disconnect */
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| 194 | ZERO_NULL, /* readwrite */
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| 195 | ZERO_NULL, /* connection_check */
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| 196 | PORT_TELNET, /* defport */
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| 197 | CURLPROTO_TELNET, /* protocol */
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| 198 | PROTOPT_NONE | PROTOPT_NOURLQUERY /* flags */
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| 199 | };
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| 200 |
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| 201 |
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| 202 | #ifdef USE_WINSOCK
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| 203 | static CURLcode
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| 204 | check_wsock2(struct Curl_easy *data)
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| 205 | {
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| 206 | int err;
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| 207 | WORD wVersionRequested;
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| 208 | WSADATA wsaData;
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| 209 |
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| 210 | DEBUGASSERT(data);
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| 211 |
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| 212 | /* telnet requires at least WinSock 2.0 so ask for it. */
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| 213 | wVersionRequested = MAKEWORD(2, 0);
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| 214 |
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| 215 | err = WSAStartup(wVersionRequested, &wsaData);
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| 216 |
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| 217 | /* We must've called this once already, so this call */
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| 218 | /* should always succeed. But, just in case... */
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| 219 | if(err != 0) {
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| 220 | failf(data,"WSAStartup failed (%d)",err);
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| 221 | return CURLE_FAILED_INIT;
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| 222 | }
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| 223 |
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| 224 | /* We have to have a WSACleanup call for every successful */
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| 225 | /* WSAStartup call. */
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| 226 | WSACleanup();
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| 227 |
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| 228 | /* Check that our version is supported */
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| 229 | if(LOBYTE(wsaData.wVersion) != LOBYTE(wVersionRequested) ||
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| 230 | HIBYTE(wsaData.wVersion) != HIBYTE(wVersionRequested)) {
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| 231 | /* Our version isn't supported */
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| 232 | failf(data, "insufficient winsock version to support "
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| 233 | "telnet");
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| 234 | return CURLE_FAILED_INIT;
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| 235 | }
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| 236 |
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| 237 | /* Our version is supported */
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| 238 | return CURLE_OK;
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| 239 | }
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| 240 | #endif
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| 241 |
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| 242 | static
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| 243 | CURLcode init_telnet(struct connectdata *conn)
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| 244 | {
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| 245 | struct TELNET *tn;
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| 246 |
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| 247 | tn = calloc(1, sizeof(struct TELNET));
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| 248 | if(!tn)
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| 249 | return CURLE_OUT_OF_MEMORY;
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| 250 |
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| 251 | conn->data->req.protop = tn; /* make us known */
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| 252 |
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| 253 | tn->telrcv_state = CURL_TS_DATA;
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| 254 |
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| 255 | /* Init suboptions */
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| 256 | CURL_SB_CLEAR(tn);
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| 257 |
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| 258 | /* Set the options we want by default */
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| 259 | tn->us_preferred[CURL_TELOPT_SGA] = CURL_YES;
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| 260 | tn->him_preferred[CURL_TELOPT_SGA] = CURL_YES;
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| 261 |
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| 262 | /* To be compliant with previous releases of libcurl
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| 263 | we enable this option by default. This behaviour
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| 264 | can be changed thanks to the "BINARY" option in
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| 265 | CURLOPT_TELNETOPTIONS
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| 266 | */
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| 267 | tn->us_preferred[CURL_TELOPT_BINARY] = CURL_YES;
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| 268 | tn->him_preferred[CURL_TELOPT_BINARY] = CURL_YES;
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| 269 |
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| 270 | /* We must allow the server to echo what we sent
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| 271 | but it is not necessary to request the server
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| 272 | to do so (it might forces the server to close
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| 273 | the connection). Hence, we ignore ECHO in the
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| 274 | negotiate function
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| 275 | */
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| 276 | tn->him_preferred[CURL_TELOPT_ECHO] = CURL_YES;
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| 277 |
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| 278 | /* Set the subnegotiation fields to send information
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| 279 | just after negotiation passed (do/will)
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| 280 |
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| 281 | Default values are (0,0) initialized by calloc.
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| 282 | According to the RFC1013 it is valid:
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| 283 | A value equal to zero is acceptable for the width (or height),
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| 284 | and means that no character width (or height) is being sent.
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| 285 | In this case, the width (or height) that will be assumed by the
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| 286 | Telnet server is operating system specific (it will probably be
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| 287 | based upon the terminal type information that may have been sent
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| 288 | using the TERMINAL TYPE Telnet option). */
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| 289 | tn->subnegotiation[CURL_TELOPT_NAWS] = CURL_YES;
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| 290 | return CURLE_OK;
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| 291 | }
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| 292 |
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| 293 | static void negotiate(struct connectdata *conn)
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| 294 | {
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| 295 | int i;
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| 296 | struct TELNET *tn = (struct TELNET *) conn->data->req.protop;
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| 297 |
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| 298 | for(i = 0; i < CURL_NTELOPTS; i++) {
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| 299 | if(i == CURL_TELOPT_ECHO)
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| 300 | continue;
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| 301 |
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| 302 | if(tn->us_preferred[i] == CURL_YES)
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| 303 | set_local_option(conn, i, CURL_YES);
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| 304 |
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| 305 | if(tn->him_preferred[i] == CURL_YES)
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| 306 | set_remote_option(conn, i, CURL_YES);
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| 307 | }
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| 308 | }
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| 309 |
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| 310 | #ifndef CURL_DISABLE_VERBOSE_STRINGS
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| 311 | static void printoption(struct Curl_easy *data,
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| 312 | const char *direction, int cmd, int option)
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| 313 | {
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| 314 | const char *fmt;
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| 315 | const char *opt;
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| 316 |
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| 317 | if(data->set.verbose) {
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| 318 | if(cmd == CURL_IAC) {
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| 319 | if(CURL_TELCMD_OK(option))
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| 320 | infof(data, "%s IAC %s\n", direction, CURL_TELCMD(option));
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| 321 | else
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| 322 | infof(data, "%s IAC %d\n", direction, option);
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| 323 | }
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| 324 | else {
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| 325 | fmt = (cmd == CURL_WILL) ? "WILL" : (cmd == CURL_WONT) ? "WONT" :
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| 326 | (cmd == CURL_DO) ? "DO" : (cmd == CURL_DONT) ? "DONT" : 0;
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| 327 | if(fmt) {
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| 328 | if(CURL_TELOPT_OK(option))
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| 329 | opt = CURL_TELOPT(option);
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| 330 | else if(option == CURL_TELOPT_EXOPL)
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| 331 | opt = "EXOPL";
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| 332 | else
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| 333 | opt = NULL;
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| 334 |
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| 335 | if(opt)
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| 336 | infof(data, "%s %s %s\n", direction, fmt, opt);
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| 337 | else
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| 338 | infof(data, "%s %s %d\n", direction, fmt, option);
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| 339 | }
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| 340 | else
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| 341 | infof(data, "%s %d %d\n", direction, cmd, option);
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| 342 | }
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| 343 | }
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| 344 | }
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| 345 | #endif
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| 346 |
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| 347 | static void send_negotiation(struct connectdata *conn, int cmd, int option)
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| 348 | {
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| 349 | unsigned char buf[3];
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| 350 | ssize_t bytes_written;
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| 351 | int err;
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| 352 | struct Curl_easy *data = conn->data;
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| 353 |
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| 354 | buf[0] = CURL_IAC;
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| 355 | buf[1] = (unsigned char)cmd;
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| 356 | buf[2] = (unsigned char)option;
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| 357 |
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| 358 | bytes_written = swrite(conn->sock[FIRSTSOCKET], buf, 3);
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| 359 | if(bytes_written < 0) {
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| 360 | err = SOCKERRNO;
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| 361 | failf(data,"Sending data failed (%d)",err);
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| 362 | }
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| 363 |
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| 364 | printoption(conn->data, "SENT", cmd, option);
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| 365 | }
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| 366 |
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| 367 | static
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| 368 | void set_remote_option(struct connectdata *conn, int option, int newstate)
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| 369 | {
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| 370 | struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
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| 371 | if(newstate == CURL_YES) {
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| 372 | switch(tn->him[option]) {
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| 373 | case CURL_NO:
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| 374 | tn->him[option] = CURL_WANTYES;
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| 375 | send_negotiation(conn, CURL_DO, option);
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| 376 | break;
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| 377 |
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| 378 | case CURL_YES:
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| 379 | /* Already enabled */
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| 380 | break;
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| 381 |
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| 382 | case CURL_WANTNO:
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| 383 | switch(tn->himq[option]) {
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| 384 | case CURL_EMPTY:
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| 385 | /* Already negotiating for CURL_YES, queue the request */
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| 386 | tn->himq[option] = CURL_OPPOSITE;
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| 387 | break;
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| 388 | case CURL_OPPOSITE:
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| 389 | /* Error: already queued an enable request */
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| 390 | break;
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| 391 | }
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| 392 | break;
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| 393 |
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| 394 | case CURL_WANTYES:
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| 395 | switch(tn->himq[option]) {
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| 396 | case CURL_EMPTY:
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| 397 | /* Error: already negotiating for enable */
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| 398 | break;
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| 399 | case CURL_OPPOSITE:
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| 400 | tn->himq[option] = CURL_EMPTY;
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| 401 | break;
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| 402 | }
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| 403 | break;
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| 404 | }
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| 405 | }
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| 406 | else { /* NO */
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| 407 | switch(tn->him[option]) {
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| 408 | case CURL_NO:
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| 409 | /* Already disabled */
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| 410 | break;
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| 411 |
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| 412 | case CURL_YES:
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| 413 | tn->him[option] = CURL_WANTNO;
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| 414 | send_negotiation(conn, CURL_DONT, option);
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| 415 | break;
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| 416 |
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| 417 | case CURL_WANTNO:
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| 418 | switch(tn->himq[option]) {
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| 419 | case CURL_EMPTY:
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| 420 | /* Already negotiating for NO */
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| 421 | break;
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| 422 | case CURL_OPPOSITE:
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| 423 | tn->himq[option] = CURL_EMPTY;
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| 424 | break;
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| 425 | }
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| 426 | break;
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| 427 |
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| 428 | case CURL_WANTYES:
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| 429 | switch(tn->himq[option]) {
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| 430 | case CURL_EMPTY:
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| 431 | tn->himq[option] = CURL_OPPOSITE;
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| 432 | break;
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| 433 | case CURL_OPPOSITE:
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| 434 | break;
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| 435 | }
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| 436 | break;
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| 437 | }
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| 438 | }
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| 439 | }
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| 440 |
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| 441 | static
|
---|
| 442 | void rec_will(struct connectdata *conn, int option)
|
---|
| 443 | {
|
---|
| 444 | struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
|
---|
| 445 | switch(tn->him[option]) {
|
---|
| 446 | case CURL_NO:
|
---|
| 447 | if(tn->him_preferred[option] == CURL_YES) {
|
---|
| 448 | tn->him[option] = CURL_YES;
|
---|
| 449 | send_negotiation(conn, CURL_DO, option);
|
---|
| 450 | }
|
---|
| 451 | else
|
---|
| 452 | send_negotiation(conn, CURL_DONT, option);
|
---|
| 453 |
|
---|
| 454 | break;
|
---|
| 455 |
|
---|
| 456 | case CURL_YES:
|
---|
| 457 | /* Already enabled */
|
---|
| 458 | break;
|
---|
| 459 |
|
---|
| 460 | case CURL_WANTNO:
|
---|
| 461 | switch(tn->himq[option]) {
|
---|
| 462 | case CURL_EMPTY:
|
---|
| 463 | /* Error: DONT answered by WILL */
|
---|
| 464 | tn->him[option] = CURL_NO;
|
---|
| 465 | break;
|
---|
| 466 | case CURL_OPPOSITE:
|
---|
| 467 | /* Error: DONT answered by WILL */
|
---|
| 468 | tn->him[option] = CURL_YES;
|
---|
| 469 | tn->himq[option] = CURL_EMPTY;
|
---|
| 470 | break;
|
---|
| 471 | }
|
---|
| 472 | break;
|
---|
| 473 |
|
---|
| 474 | case CURL_WANTYES:
|
---|
| 475 | switch(tn->himq[option]) {
|
---|
| 476 | case CURL_EMPTY:
|
---|
| 477 | tn->him[option] = CURL_YES;
|
---|
| 478 | break;
|
---|
| 479 | case CURL_OPPOSITE:
|
---|
| 480 | tn->him[option] = CURL_WANTNO;
|
---|
| 481 | tn->himq[option] = CURL_EMPTY;
|
---|
| 482 | send_negotiation(conn, CURL_DONT, option);
|
---|
| 483 | break;
|
---|
| 484 | }
|
---|
| 485 | break;
|
---|
| 486 | }
|
---|
| 487 | }
|
---|
| 488 |
|
---|
| 489 | static
|
---|
| 490 | void rec_wont(struct connectdata *conn, int option)
|
---|
| 491 | {
|
---|
| 492 | struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
|
---|
| 493 | switch(tn->him[option]) {
|
---|
| 494 | case CURL_NO:
|
---|
| 495 | /* Already disabled */
|
---|
| 496 | break;
|
---|
| 497 |
|
---|
| 498 | case CURL_YES:
|
---|
| 499 | tn->him[option] = CURL_NO;
|
---|
| 500 | send_negotiation(conn, CURL_DONT, option);
|
---|
| 501 | break;
|
---|
| 502 |
|
---|
| 503 | case CURL_WANTNO:
|
---|
| 504 | switch(tn->himq[option]) {
|
---|
| 505 | case CURL_EMPTY:
|
---|
| 506 | tn->him[option] = CURL_NO;
|
---|
| 507 | break;
|
---|
| 508 |
|
---|
| 509 | case CURL_OPPOSITE:
|
---|
| 510 | tn->him[option] = CURL_WANTYES;
|
---|
| 511 | tn->himq[option] = CURL_EMPTY;
|
---|
| 512 | send_negotiation(conn, CURL_DO, option);
|
---|
| 513 | break;
|
---|
| 514 | }
|
---|
| 515 | break;
|
---|
| 516 |
|
---|
| 517 | case CURL_WANTYES:
|
---|
| 518 | switch(tn->himq[option]) {
|
---|
| 519 | case CURL_EMPTY:
|
---|
| 520 | tn->him[option] = CURL_NO;
|
---|
| 521 | break;
|
---|
| 522 | case CURL_OPPOSITE:
|
---|
| 523 | tn->him[option] = CURL_NO;
|
---|
| 524 | tn->himq[option] = CURL_EMPTY;
|
---|
| 525 | break;
|
---|
| 526 | }
|
---|
| 527 | break;
|
---|
| 528 | }
|
---|
| 529 | }
|
---|
| 530 |
|
---|
| 531 | static void
|
---|
| 532 | set_local_option(struct connectdata *conn, int option, int newstate)
|
---|
| 533 | {
|
---|
| 534 | struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
|
---|
| 535 | if(newstate == CURL_YES) {
|
---|
| 536 | switch(tn->us[option]) {
|
---|
| 537 | case CURL_NO:
|
---|
| 538 | tn->us[option] = CURL_WANTYES;
|
---|
| 539 | send_negotiation(conn, CURL_WILL, option);
|
---|
| 540 | break;
|
---|
| 541 |
|
---|
| 542 | case CURL_YES:
|
---|
| 543 | /* Already enabled */
|
---|
| 544 | break;
|
---|
| 545 |
|
---|
| 546 | case CURL_WANTNO:
|
---|
| 547 | switch(tn->usq[option]) {
|
---|
| 548 | case CURL_EMPTY:
|
---|
| 549 | /* Already negotiating for CURL_YES, queue the request */
|
---|
| 550 | tn->usq[option] = CURL_OPPOSITE;
|
---|
| 551 | break;
|
---|
| 552 | case CURL_OPPOSITE:
|
---|
| 553 | /* Error: already queued an enable request */
|
---|
| 554 | break;
|
---|
| 555 | }
|
---|
| 556 | break;
|
---|
| 557 |
|
---|
| 558 | case CURL_WANTYES:
|
---|
| 559 | switch(tn->usq[option]) {
|
---|
| 560 | case CURL_EMPTY:
|
---|
| 561 | /* Error: already negotiating for enable */
|
---|
| 562 | break;
|
---|
| 563 | case CURL_OPPOSITE:
|
---|
| 564 | tn->usq[option] = CURL_EMPTY;
|
---|
| 565 | break;
|
---|
| 566 | }
|
---|
| 567 | break;
|
---|
| 568 | }
|
---|
| 569 | }
|
---|
| 570 | else { /* NO */
|
---|
| 571 | switch(tn->us[option]) {
|
---|
| 572 | case CURL_NO:
|
---|
| 573 | /* Already disabled */
|
---|
| 574 | break;
|
---|
| 575 |
|
---|
| 576 | case CURL_YES:
|
---|
| 577 | tn->us[option] = CURL_WANTNO;
|
---|
| 578 | send_negotiation(conn, CURL_WONT, option);
|
---|
| 579 | break;
|
---|
| 580 |
|
---|
| 581 | case CURL_WANTNO:
|
---|
| 582 | switch(tn->usq[option]) {
|
---|
| 583 | case CURL_EMPTY:
|
---|
| 584 | /* Already negotiating for NO */
|
---|
| 585 | break;
|
---|
| 586 | case CURL_OPPOSITE:
|
---|
| 587 | tn->usq[option] = CURL_EMPTY;
|
---|
| 588 | break;
|
---|
| 589 | }
|
---|
| 590 | break;
|
---|
| 591 |
|
---|
| 592 | case CURL_WANTYES:
|
---|
| 593 | switch(tn->usq[option]) {
|
---|
| 594 | case CURL_EMPTY:
|
---|
| 595 | tn->usq[option] = CURL_OPPOSITE;
|
---|
| 596 | break;
|
---|
| 597 | case CURL_OPPOSITE:
|
---|
| 598 | break;
|
---|
| 599 | }
|
---|
| 600 | break;
|
---|
| 601 | }
|
---|
| 602 | }
|
---|
| 603 | }
|
---|
| 604 |
|
---|
| 605 | static
|
---|
| 606 | void rec_do(struct connectdata *conn, int option)
|
---|
| 607 | {
|
---|
| 608 | struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
|
---|
| 609 | switch(tn->us[option]) {
|
---|
| 610 | case CURL_NO:
|
---|
| 611 | if(tn->us_preferred[option] == CURL_YES) {
|
---|
| 612 | tn->us[option] = CURL_YES;
|
---|
| 613 | send_negotiation(conn, CURL_WILL, option);
|
---|
| 614 | if(tn->subnegotiation[option] == CURL_YES)
|
---|
| 615 | /* transmission of data option */
|
---|
| 616 | sendsuboption(conn, option);
|
---|
| 617 | }
|
---|
| 618 | else if(tn->subnegotiation[option] == CURL_YES) {
|
---|
| 619 | /* send information to achieve this option*/
|
---|
| 620 | tn->us[option] = CURL_YES;
|
---|
| 621 | send_negotiation(conn, CURL_WILL, option);
|
---|
| 622 | sendsuboption(conn, option);
|
---|
| 623 | }
|
---|
| 624 | else
|
---|
| 625 | send_negotiation(conn, CURL_WONT, option);
|
---|
| 626 | break;
|
---|
| 627 |
|
---|
| 628 | case CURL_YES:
|
---|
| 629 | /* Already enabled */
|
---|
| 630 | break;
|
---|
| 631 |
|
---|
| 632 | case CURL_WANTNO:
|
---|
| 633 | switch(tn->usq[option]) {
|
---|
| 634 | case CURL_EMPTY:
|
---|
| 635 | /* Error: DONT answered by WILL */
|
---|
| 636 | tn->us[option] = CURL_NO;
|
---|
| 637 | break;
|
---|
| 638 | case CURL_OPPOSITE:
|
---|
| 639 | /* Error: DONT answered by WILL */
|
---|
| 640 | tn->us[option] = CURL_YES;
|
---|
| 641 | tn->usq[option] = CURL_EMPTY;
|
---|
| 642 | break;
|
---|
| 643 | }
|
---|
| 644 | break;
|
---|
| 645 |
|
---|
| 646 | case CURL_WANTYES:
|
---|
| 647 | switch(tn->usq[option]) {
|
---|
| 648 | case CURL_EMPTY:
|
---|
| 649 | tn->us[option] = CURL_YES;
|
---|
| 650 | if(tn->subnegotiation[option] == CURL_YES) {
|
---|
| 651 | /* transmission of data option */
|
---|
| 652 | sendsuboption(conn, option);
|
---|
| 653 | }
|
---|
| 654 | break;
|
---|
| 655 | case CURL_OPPOSITE:
|
---|
| 656 | tn->us[option] = CURL_WANTNO;
|
---|
| 657 | tn->himq[option] = CURL_EMPTY;
|
---|
| 658 | send_negotiation(conn, CURL_WONT, option);
|
---|
| 659 | break;
|
---|
| 660 | }
|
---|
| 661 | break;
|
---|
| 662 | }
|
---|
| 663 | }
|
---|
| 664 |
|
---|
| 665 | static
|
---|
| 666 | void rec_dont(struct connectdata *conn, int option)
|
---|
| 667 | {
|
---|
| 668 | struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
|
---|
| 669 | switch(tn->us[option]) {
|
---|
| 670 | case CURL_NO:
|
---|
| 671 | /* Already disabled */
|
---|
| 672 | break;
|
---|
| 673 |
|
---|
| 674 | case CURL_YES:
|
---|
| 675 | tn->us[option] = CURL_NO;
|
---|
| 676 | send_negotiation(conn, CURL_WONT, option);
|
---|
| 677 | break;
|
---|
| 678 |
|
---|
| 679 | case CURL_WANTNO:
|
---|
| 680 | switch(tn->usq[option]) {
|
---|
| 681 | case CURL_EMPTY:
|
---|
| 682 | tn->us[option] = CURL_NO;
|
---|
| 683 | break;
|
---|
| 684 |
|
---|
| 685 | case CURL_OPPOSITE:
|
---|
| 686 | tn->us[option] = CURL_WANTYES;
|
---|
| 687 | tn->usq[option] = CURL_EMPTY;
|
---|
| 688 | send_negotiation(conn, CURL_WILL, option);
|
---|
| 689 | break;
|
---|
| 690 | }
|
---|
| 691 | break;
|
---|
| 692 |
|
---|
| 693 | case CURL_WANTYES:
|
---|
| 694 | switch(tn->usq[option]) {
|
---|
| 695 | case CURL_EMPTY:
|
---|
| 696 | tn->us[option] = CURL_NO;
|
---|
| 697 | break;
|
---|
| 698 | case CURL_OPPOSITE:
|
---|
| 699 | tn->us[option] = CURL_NO;
|
---|
| 700 | tn->usq[option] = CURL_EMPTY;
|
---|
| 701 | break;
|
---|
| 702 | }
|
---|
| 703 | break;
|
---|
| 704 | }
|
---|
| 705 | }
|
---|
| 706 |
|
---|
| 707 |
|
---|
| 708 | static void printsub(struct Curl_easy *data,
|
---|
| 709 | int direction, /* '<' or '>' */
|
---|
| 710 | unsigned char *pointer, /* where suboption data is */
|
---|
| 711 | size_t length) /* length of suboption data */
|
---|
| 712 | {
|
---|
| 713 | unsigned int i = 0;
|
---|
| 714 |
|
---|
| 715 | if(data->set.verbose) {
|
---|
| 716 | if(direction) {
|
---|
| 717 | infof(data, "%s IAC SB ", (direction == '<')? "RCVD":"SENT");
|
---|
| 718 | if(length >= 3) {
|
---|
| 719 | int j;
|
---|
| 720 |
|
---|
| 721 | i = pointer[length-2];
|
---|
| 722 | j = pointer[length-1];
|
---|
| 723 |
|
---|
| 724 | if(i != CURL_IAC || j != CURL_SE) {
|
---|
| 725 | infof(data, "(terminated by ");
|
---|
| 726 | if(CURL_TELOPT_OK(i))
|
---|
| 727 | infof(data, "%s ", CURL_TELOPT(i));
|
---|
| 728 | else if(CURL_TELCMD_OK(i))
|
---|
| 729 | infof(data, "%s ", CURL_TELCMD(i));
|
---|
| 730 | else
|
---|
| 731 | infof(data, "%u ", i);
|
---|
| 732 | if(CURL_TELOPT_OK(j))
|
---|
| 733 | infof(data, "%s", CURL_TELOPT(j));
|
---|
| 734 | else if(CURL_TELCMD_OK(j))
|
---|
| 735 | infof(data, "%s", CURL_TELCMD(j));
|
---|
| 736 | else
|
---|
| 737 | infof(data, "%d", j);
|
---|
| 738 | infof(data, ", not IAC SE!) ");
|
---|
| 739 | }
|
---|
| 740 | }
|
---|
| 741 | length -= 2;
|
---|
| 742 | }
|
---|
| 743 | if(length < 1) {
|
---|
| 744 | infof(data, "(Empty suboption?)");
|
---|
| 745 | return;
|
---|
| 746 | }
|
---|
| 747 |
|
---|
| 748 | if(CURL_TELOPT_OK(pointer[0])) {
|
---|
| 749 | switch(pointer[0]) {
|
---|
| 750 | case CURL_TELOPT_TTYPE:
|
---|
| 751 | case CURL_TELOPT_XDISPLOC:
|
---|
| 752 | case CURL_TELOPT_NEW_ENVIRON:
|
---|
| 753 | case CURL_TELOPT_NAWS:
|
---|
| 754 | infof(data, "%s", CURL_TELOPT(pointer[0]));
|
---|
| 755 | break;
|
---|
| 756 | default:
|
---|
| 757 | infof(data, "%s (unsupported)", CURL_TELOPT(pointer[0]));
|
---|
| 758 | break;
|
---|
| 759 | }
|
---|
| 760 | }
|
---|
| 761 | else
|
---|
| 762 | infof(data, "%d (unknown)", pointer[i]);
|
---|
| 763 |
|
---|
| 764 | switch(pointer[0]) {
|
---|
| 765 | case CURL_TELOPT_NAWS:
|
---|
| 766 | if(length > 4)
|
---|
| 767 | infof(data, "Width: %hu ; Height: %hu", (pointer[1]<<8) | pointer[2],
|
---|
| 768 | (pointer[3]<<8) | pointer[4]);
|
---|
| 769 | break;
|
---|
| 770 | default:
|
---|
| 771 | switch(pointer[1]) {
|
---|
| 772 | case CURL_TELQUAL_IS:
|
---|
| 773 | infof(data, " IS");
|
---|
| 774 | break;
|
---|
| 775 | case CURL_TELQUAL_SEND:
|
---|
| 776 | infof(data, " SEND");
|
---|
| 777 | break;
|
---|
| 778 | case CURL_TELQUAL_INFO:
|
---|
| 779 | infof(data, " INFO/REPLY");
|
---|
| 780 | break;
|
---|
| 781 | case CURL_TELQUAL_NAME:
|
---|
| 782 | infof(data, " NAME");
|
---|
| 783 | break;
|
---|
| 784 | }
|
---|
| 785 |
|
---|
| 786 | switch(pointer[0]) {
|
---|
| 787 | case CURL_TELOPT_TTYPE:
|
---|
| 788 | case CURL_TELOPT_XDISPLOC:
|
---|
| 789 | pointer[length] = 0;
|
---|
| 790 | infof(data, " \"%s\"", &pointer[2]);
|
---|
| 791 | break;
|
---|
| 792 | case CURL_TELOPT_NEW_ENVIRON:
|
---|
| 793 | if(pointer[1] == CURL_TELQUAL_IS) {
|
---|
| 794 | infof(data, " ");
|
---|
| 795 | for(i = 3; i < length; i++) {
|
---|
| 796 | switch(pointer[i]) {
|
---|
| 797 | case CURL_NEW_ENV_VAR:
|
---|
| 798 | infof(data, ", ");
|
---|
| 799 | break;
|
---|
| 800 | case CURL_NEW_ENV_VALUE:
|
---|
| 801 | infof(data, " = ");
|
---|
| 802 | break;
|
---|
| 803 | default:
|
---|
| 804 | infof(data, "%c", pointer[i]);
|
---|
| 805 | break;
|
---|
| 806 | }
|
---|
| 807 | }
|
---|
| 808 | }
|
---|
| 809 | break;
|
---|
| 810 | default:
|
---|
| 811 | for(i = 2; i < length; i++)
|
---|
| 812 | infof(data, " %.2x", pointer[i]);
|
---|
| 813 | break;
|
---|
| 814 | }
|
---|
| 815 | }
|
---|
| 816 | if(direction)
|
---|
| 817 | infof(data, "\n");
|
---|
| 818 | }
|
---|
| 819 | }
|
---|
| 820 |
|
---|
| 821 | static CURLcode check_telnet_options(struct connectdata *conn)
|
---|
| 822 | {
|
---|
| 823 | struct curl_slist *head;
|
---|
| 824 | struct curl_slist *beg;
|
---|
| 825 | char option_keyword[128] = "";
|
---|
| 826 | char option_arg[256] = "";
|
---|
| 827 | struct Curl_easy *data = conn->data;
|
---|
| 828 | struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
|
---|
| 829 | CURLcode result = CURLE_OK;
|
---|
| 830 | int binary_option;
|
---|
| 831 |
|
---|
| 832 | /* Add the user name as an environment variable if it
|
---|
| 833 | was given on the command line */
|
---|
| 834 | if(conn->bits.user_passwd) {
|
---|
| 835 | snprintf(option_arg, sizeof(option_arg), "USER,%s", conn->user);
|
---|
| 836 | beg = curl_slist_append(tn->telnet_vars, option_arg);
|
---|
| 837 | if(!beg) {
|
---|
| 838 | curl_slist_free_all(tn->telnet_vars);
|
---|
| 839 | tn->telnet_vars = NULL;
|
---|
| 840 | return CURLE_OUT_OF_MEMORY;
|
---|
| 841 | }
|
---|
| 842 | tn->telnet_vars = beg;
|
---|
| 843 | tn->us_preferred[CURL_TELOPT_NEW_ENVIRON] = CURL_YES;
|
---|
| 844 | }
|
---|
| 845 |
|
---|
| 846 | for(head = data->set.telnet_options; head; head = head->next) {
|
---|
| 847 | if(sscanf(head->data, "%127[^= ]%*[ =]%255s",
|
---|
| 848 | option_keyword, option_arg) == 2) {
|
---|
| 849 |
|
---|
| 850 | /* Terminal type */
|
---|
| 851 | if(strcasecompare(option_keyword, "TTYPE")) {
|
---|
| 852 | strncpy(tn->subopt_ttype, option_arg, 31);
|
---|
| 853 | tn->subopt_ttype[31] = 0; /* String termination */
|
---|
| 854 | tn->us_preferred[CURL_TELOPT_TTYPE] = CURL_YES;
|
---|
| 855 | continue;
|
---|
| 856 | }
|
---|
| 857 |
|
---|
| 858 | /* Display variable */
|
---|
| 859 | if(strcasecompare(option_keyword, "XDISPLOC")) {
|
---|
| 860 | strncpy(tn->subopt_xdisploc, option_arg, 127);
|
---|
| 861 | tn->subopt_xdisploc[127] = 0; /* String termination */
|
---|
| 862 | tn->us_preferred[CURL_TELOPT_XDISPLOC] = CURL_YES;
|
---|
| 863 | continue;
|
---|
| 864 | }
|
---|
| 865 |
|
---|
| 866 | /* Environment variable */
|
---|
| 867 | if(strcasecompare(option_keyword, "NEW_ENV")) {
|
---|
| 868 | beg = curl_slist_append(tn->telnet_vars, option_arg);
|
---|
| 869 | if(!beg) {
|
---|
| 870 | result = CURLE_OUT_OF_MEMORY;
|
---|
| 871 | break;
|
---|
| 872 | }
|
---|
| 873 | tn->telnet_vars = beg;
|
---|
| 874 | tn->us_preferred[CURL_TELOPT_NEW_ENVIRON] = CURL_YES;
|
---|
| 875 | continue;
|
---|
| 876 | }
|
---|
| 877 |
|
---|
| 878 | /* Window Size */
|
---|
| 879 | if(strcasecompare(option_keyword, "WS")) {
|
---|
| 880 | if(sscanf(option_arg, "%hu%*[xX]%hu",
|
---|
| 881 | &tn->subopt_wsx, &tn->subopt_wsy) == 2)
|
---|
| 882 | tn->us_preferred[CURL_TELOPT_NAWS] = CURL_YES;
|
---|
| 883 | else {
|
---|
| 884 | failf(data, "Syntax error in telnet option: %s", head->data);
|
---|
| 885 | result = CURLE_TELNET_OPTION_SYNTAX;
|
---|
| 886 | break;
|
---|
| 887 | }
|
---|
| 888 | continue;
|
---|
| 889 | }
|
---|
| 890 |
|
---|
| 891 | /* To take care or not of the 8th bit in data exchange */
|
---|
| 892 | if(strcasecompare(option_keyword, "BINARY")) {
|
---|
| 893 | binary_option = atoi(option_arg);
|
---|
| 894 | if(binary_option != 1) {
|
---|
| 895 | tn->us_preferred[CURL_TELOPT_BINARY] = CURL_NO;
|
---|
| 896 | tn->him_preferred[CURL_TELOPT_BINARY] = CURL_NO;
|
---|
| 897 | }
|
---|
| 898 | continue;
|
---|
| 899 | }
|
---|
| 900 |
|
---|
| 901 | failf(data, "Unknown telnet option %s", head->data);
|
---|
| 902 | result = CURLE_UNKNOWN_OPTION;
|
---|
| 903 | break;
|
---|
| 904 | }
|
---|
| 905 | failf(data, "Syntax error in telnet option: %s", head->data);
|
---|
| 906 | result = CURLE_TELNET_OPTION_SYNTAX;
|
---|
| 907 | break;
|
---|
| 908 | }
|
---|
| 909 |
|
---|
| 910 | if(result) {
|
---|
| 911 | curl_slist_free_all(tn->telnet_vars);
|
---|
| 912 | tn->telnet_vars = NULL;
|
---|
| 913 | }
|
---|
| 914 |
|
---|
| 915 | return result;
|
---|
| 916 | }
|
---|
| 917 |
|
---|
| 918 | /*
|
---|
| 919 | * suboption()
|
---|
| 920 | *
|
---|
| 921 | * Look at the sub-option buffer, and try to be helpful to the other
|
---|
| 922 | * side.
|
---|
| 923 | */
|
---|
| 924 |
|
---|
| 925 | static void suboption(struct connectdata *conn)
|
---|
| 926 | {
|
---|
| 927 | struct curl_slist *v;
|
---|
| 928 | unsigned char temp[2048];
|
---|
| 929 | ssize_t bytes_written;
|
---|
| 930 | size_t len;
|
---|
| 931 | size_t tmplen;
|
---|
| 932 | int err;
|
---|
| 933 | char varname[128] = "";
|
---|
| 934 | char varval[128] = "";
|
---|
| 935 | struct Curl_easy *data = conn->data;
|
---|
| 936 | struct TELNET *tn = (struct TELNET *)data->req.protop;
|
---|
| 937 |
|
---|
| 938 | printsub(data, '<', (unsigned char *)tn->subbuffer, CURL_SB_LEN(tn) + 2);
|
---|
| 939 | switch(CURL_SB_GET(tn)) {
|
---|
| 940 | case CURL_TELOPT_TTYPE:
|
---|
| 941 | len = strlen(tn->subopt_ttype) + 4 + 2;
|
---|
| 942 | snprintf((char *)temp, sizeof(temp),
|
---|
| 943 | "%c%c%c%c%s%c%c", CURL_IAC, CURL_SB, CURL_TELOPT_TTYPE,
|
---|
| 944 | CURL_TELQUAL_IS, tn->subopt_ttype, CURL_IAC, CURL_SE);
|
---|
| 945 | bytes_written = swrite(conn->sock[FIRSTSOCKET], temp, len);
|
---|
| 946 | if(bytes_written < 0) {
|
---|
| 947 | err = SOCKERRNO;
|
---|
| 948 | failf(data,"Sending data failed (%d)",err);
|
---|
| 949 | }
|
---|
| 950 | printsub(data, '>', &temp[2], len-2);
|
---|
| 951 | break;
|
---|
| 952 | case CURL_TELOPT_XDISPLOC:
|
---|
| 953 | len = strlen(tn->subopt_xdisploc) + 4 + 2;
|
---|
| 954 | snprintf((char *)temp, sizeof(temp),
|
---|
| 955 | "%c%c%c%c%s%c%c", CURL_IAC, CURL_SB, CURL_TELOPT_XDISPLOC,
|
---|
| 956 | CURL_TELQUAL_IS, tn->subopt_xdisploc, CURL_IAC, CURL_SE);
|
---|
| 957 | bytes_written = swrite(conn->sock[FIRSTSOCKET], temp, len);
|
---|
| 958 | if(bytes_written < 0) {
|
---|
| 959 | err = SOCKERRNO;
|
---|
| 960 | failf(data,"Sending data failed (%d)",err);
|
---|
| 961 | }
|
---|
| 962 | printsub(data, '>', &temp[2], len-2);
|
---|
| 963 | break;
|
---|
| 964 | case CURL_TELOPT_NEW_ENVIRON:
|
---|
| 965 | snprintf((char *)temp, sizeof(temp),
|
---|
| 966 | "%c%c%c%c", CURL_IAC, CURL_SB, CURL_TELOPT_NEW_ENVIRON,
|
---|
| 967 | CURL_TELQUAL_IS);
|
---|
| 968 | len = 4;
|
---|
| 969 |
|
---|
| 970 | for(v = tn->telnet_vars; v; v = v->next) {
|
---|
| 971 | tmplen = (strlen(v->data) + 1);
|
---|
| 972 | /* Add the variable only if it fits */
|
---|
| 973 | if(len + tmplen < (int)sizeof(temp)-6) {
|
---|
| 974 | if(sscanf(v->data, "%127[^,],%127s", varname, varval)) {
|
---|
| 975 | snprintf((char *)&temp[len], sizeof(temp) - len,
|
---|
| 976 | "%c%s%c%s", CURL_NEW_ENV_VAR, varname,
|
---|
| 977 | CURL_NEW_ENV_VALUE, varval);
|
---|
| 978 | len += tmplen;
|
---|
| 979 | }
|
---|
| 980 | }
|
---|
| 981 | }
|
---|
| 982 | snprintf((char *)&temp[len], sizeof(temp) - len,
|
---|
| 983 | "%c%c", CURL_IAC, CURL_SE);
|
---|
| 984 | len += 2;
|
---|
| 985 | bytes_written = swrite(conn->sock[FIRSTSOCKET], temp, len);
|
---|
| 986 | if(bytes_written < 0) {
|
---|
| 987 | err = SOCKERRNO;
|
---|
| 988 | failf(data,"Sending data failed (%d)",err);
|
---|
| 989 | }
|
---|
| 990 | printsub(data, '>', &temp[2], len-2);
|
---|
| 991 | break;
|
---|
| 992 | }
|
---|
| 993 | return;
|
---|
| 994 | }
|
---|
| 995 |
|
---|
| 996 |
|
---|
| 997 | /*
|
---|
| 998 | * sendsuboption()
|
---|
| 999 | *
|
---|
| 1000 | * Send suboption information to the server side.
|
---|
| 1001 | */
|
---|
| 1002 |
|
---|
| 1003 | static void sendsuboption(struct connectdata *conn, int option)
|
---|
| 1004 | {
|
---|
| 1005 | ssize_t bytes_written;
|
---|
| 1006 | int err;
|
---|
| 1007 | unsigned short x, y;
|
---|
| 1008 | unsigned char *uc1, *uc2;
|
---|
| 1009 |
|
---|
| 1010 | struct Curl_easy *data = conn->data;
|
---|
| 1011 | struct TELNET *tn = (struct TELNET *)data->req.protop;
|
---|
| 1012 |
|
---|
| 1013 | switch(option) {
|
---|
| 1014 | case CURL_TELOPT_NAWS:
|
---|
| 1015 | /* We prepare data to be sent */
|
---|
| 1016 | CURL_SB_CLEAR(tn);
|
---|
| 1017 | CURL_SB_ACCUM(tn, CURL_IAC);
|
---|
| 1018 | CURL_SB_ACCUM(tn, CURL_SB);
|
---|
| 1019 | CURL_SB_ACCUM(tn, CURL_TELOPT_NAWS);
|
---|
| 1020 | /* We must deal either with litte or big endian processors */
|
---|
| 1021 | /* Window size must be sent according to the 'network order' */
|
---|
| 1022 | x = htons(tn->subopt_wsx);
|
---|
| 1023 | y = htons(tn->subopt_wsy);
|
---|
| 1024 | uc1 = (unsigned char *)&x;
|
---|
| 1025 | uc2 = (unsigned char *)&y;
|
---|
| 1026 | CURL_SB_ACCUM(tn, uc1[0]);
|
---|
| 1027 | CURL_SB_ACCUM(tn, uc1[1]);
|
---|
| 1028 | CURL_SB_ACCUM(tn, uc2[0]);
|
---|
| 1029 | CURL_SB_ACCUM(tn, uc2[1]);
|
---|
| 1030 |
|
---|
| 1031 | CURL_SB_ACCUM(tn, CURL_IAC);
|
---|
| 1032 | CURL_SB_ACCUM(tn, CURL_SE);
|
---|
| 1033 | CURL_SB_TERM(tn);
|
---|
| 1034 | /* data suboption is now ready */
|
---|
| 1035 |
|
---|
| 1036 | printsub(data, '>', (unsigned char *)tn->subbuffer + 2,
|
---|
| 1037 | CURL_SB_LEN(tn)-2);
|
---|
| 1038 |
|
---|
| 1039 | /* we send the header of the suboption... */
|
---|
| 1040 | bytes_written = swrite(conn->sock[FIRSTSOCKET], tn->subbuffer, 3);
|
---|
| 1041 | if(bytes_written < 0) {
|
---|
| 1042 | err = SOCKERRNO;
|
---|
| 1043 | failf(data, "Sending data failed (%d)", err);
|
---|
| 1044 | }
|
---|
| 1045 | /* ... then the window size with the send_telnet_data() function
|
---|
| 1046 | to deal with 0xFF cases ... */
|
---|
| 1047 | send_telnet_data(conn, (char *)tn->subbuffer + 3, 4);
|
---|
| 1048 | /* ... and the footer */
|
---|
| 1049 | bytes_written = swrite(conn->sock[FIRSTSOCKET], tn->subbuffer + 7, 2);
|
---|
| 1050 | if(bytes_written < 0) {
|
---|
| 1051 | err = SOCKERRNO;
|
---|
| 1052 | failf(data, "Sending data failed (%d)", err);
|
---|
| 1053 | }
|
---|
| 1054 | break;
|
---|
| 1055 | }
|
---|
| 1056 | }
|
---|
| 1057 |
|
---|
| 1058 |
|
---|
| 1059 | static
|
---|
| 1060 | CURLcode telrcv(struct connectdata *conn,
|
---|
| 1061 | const unsigned char *inbuf, /* Data received from socket */
|
---|
| 1062 | ssize_t count) /* Number of bytes received */
|
---|
| 1063 | {
|
---|
| 1064 | unsigned char c;
|
---|
| 1065 | CURLcode result;
|
---|
| 1066 | int in = 0;
|
---|
| 1067 | int startwrite = -1;
|
---|
| 1068 | struct Curl_easy *data = conn->data;
|
---|
| 1069 | struct TELNET *tn = (struct TELNET *)data->req.protop;
|
---|
| 1070 |
|
---|
| 1071 | #define startskipping() \
|
---|
| 1072 | if(startwrite >= 0) { \
|
---|
| 1073 | result = Curl_client_write(conn, \
|
---|
| 1074 | CLIENTWRITE_BODY, \
|
---|
| 1075 | (char *)&inbuf[startwrite], \
|
---|
| 1076 | in-startwrite); \
|
---|
| 1077 | if(result) \
|
---|
| 1078 | return result; \
|
---|
| 1079 | } \
|
---|
| 1080 | startwrite = -1
|
---|
| 1081 |
|
---|
| 1082 | #define writebyte() \
|
---|
| 1083 | if(startwrite < 0) \
|
---|
| 1084 | startwrite = in
|
---|
| 1085 |
|
---|
| 1086 | #define bufferflush() startskipping()
|
---|
| 1087 |
|
---|
| 1088 | while(count--) {
|
---|
| 1089 | c = inbuf[in];
|
---|
| 1090 |
|
---|
| 1091 | switch(tn->telrcv_state) {
|
---|
| 1092 | case CURL_TS_CR:
|
---|
| 1093 | tn->telrcv_state = CURL_TS_DATA;
|
---|
| 1094 | if(c == '\0') {
|
---|
| 1095 | startskipping();
|
---|
| 1096 | break; /* Ignore \0 after CR */
|
---|
| 1097 | }
|
---|
| 1098 | writebyte();
|
---|
| 1099 | break;
|
---|
| 1100 |
|
---|
| 1101 | case CURL_TS_DATA:
|
---|
| 1102 | if(c == CURL_IAC) {
|
---|
| 1103 | tn->telrcv_state = CURL_TS_IAC;
|
---|
| 1104 | startskipping();
|
---|
| 1105 | break;
|
---|
| 1106 | }
|
---|
| 1107 | else if(c == '\r')
|
---|
| 1108 | tn->telrcv_state = CURL_TS_CR;
|
---|
| 1109 | writebyte();
|
---|
| 1110 | break;
|
---|
| 1111 |
|
---|
| 1112 | case CURL_TS_IAC:
|
---|
| 1113 | process_iac:
|
---|
| 1114 | DEBUGASSERT(startwrite < 0);
|
---|
| 1115 | switch(c) {
|
---|
| 1116 | case CURL_WILL:
|
---|
| 1117 | tn->telrcv_state = CURL_TS_WILL;
|
---|
| 1118 | break;
|
---|
| 1119 | case CURL_WONT:
|
---|
| 1120 | tn->telrcv_state = CURL_TS_WONT;
|
---|
| 1121 | break;
|
---|
| 1122 | case CURL_DO:
|
---|
| 1123 | tn->telrcv_state = CURL_TS_DO;
|
---|
| 1124 | break;
|
---|
| 1125 | case CURL_DONT:
|
---|
| 1126 | tn->telrcv_state = CURL_TS_DONT;
|
---|
| 1127 | break;
|
---|
| 1128 | case CURL_SB:
|
---|
| 1129 | CURL_SB_CLEAR(tn);
|
---|
| 1130 | tn->telrcv_state = CURL_TS_SB;
|
---|
| 1131 | break;
|
---|
| 1132 | case CURL_IAC:
|
---|
| 1133 | tn->telrcv_state = CURL_TS_DATA;
|
---|
| 1134 | writebyte();
|
---|
| 1135 | break;
|
---|
| 1136 | case CURL_DM:
|
---|
| 1137 | case CURL_NOP:
|
---|
| 1138 | case CURL_GA:
|
---|
| 1139 | default:
|
---|
| 1140 | tn->telrcv_state = CURL_TS_DATA;
|
---|
| 1141 | printoption(data, "RCVD", CURL_IAC, c);
|
---|
| 1142 | break;
|
---|
| 1143 | }
|
---|
| 1144 | break;
|
---|
| 1145 |
|
---|
| 1146 | case CURL_TS_WILL:
|
---|
| 1147 | printoption(data, "RCVD", CURL_WILL, c);
|
---|
| 1148 | tn->please_negotiate = 1;
|
---|
| 1149 | rec_will(conn, c);
|
---|
| 1150 | tn->telrcv_state = CURL_TS_DATA;
|
---|
| 1151 | break;
|
---|
| 1152 |
|
---|
| 1153 | case CURL_TS_WONT:
|
---|
| 1154 | printoption(data, "RCVD", CURL_WONT, c);
|
---|
| 1155 | tn->please_negotiate = 1;
|
---|
| 1156 | rec_wont(conn, c);
|
---|
| 1157 | tn->telrcv_state = CURL_TS_DATA;
|
---|
| 1158 | break;
|
---|
| 1159 |
|
---|
| 1160 | case CURL_TS_DO:
|
---|
| 1161 | printoption(data, "RCVD", CURL_DO, c);
|
---|
| 1162 | tn->please_negotiate = 1;
|
---|
| 1163 | rec_do(conn, c);
|
---|
| 1164 | tn->telrcv_state = CURL_TS_DATA;
|
---|
| 1165 | break;
|
---|
| 1166 |
|
---|
| 1167 | case CURL_TS_DONT:
|
---|
| 1168 | printoption(data, "RCVD", CURL_DONT, c);
|
---|
| 1169 | tn->please_negotiate = 1;
|
---|
| 1170 | rec_dont(conn, c);
|
---|
| 1171 | tn->telrcv_state = CURL_TS_DATA;
|
---|
| 1172 | break;
|
---|
| 1173 |
|
---|
| 1174 | case CURL_TS_SB:
|
---|
| 1175 | if(c == CURL_IAC)
|
---|
| 1176 | tn->telrcv_state = CURL_TS_SE;
|
---|
| 1177 | else
|
---|
| 1178 | CURL_SB_ACCUM(tn, c);
|
---|
| 1179 | break;
|
---|
| 1180 |
|
---|
| 1181 | case CURL_TS_SE:
|
---|
| 1182 | if(c != CURL_SE) {
|
---|
| 1183 | if(c != CURL_IAC) {
|
---|
| 1184 | /*
|
---|
| 1185 | * This is an error. We only expect to get "IAC IAC" or "IAC SE".
|
---|
| 1186 | * Several things may have happened. An IAC was not doubled, the
|
---|
| 1187 | * IAC SE was left off, or another option got inserted into the
|
---|
| 1188 | * suboption are all possibilities. If we assume that the IAC was
|
---|
| 1189 | * not doubled, and really the IAC SE was left off, we could get
|
---|
| 1190 | * into an infinite loop here. So, instead, we terminate the
|
---|
| 1191 | * suboption, and process the partial suboption if we can.
|
---|
| 1192 | */
|
---|
| 1193 | CURL_SB_ACCUM(tn, CURL_IAC);
|
---|
| 1194 | CURL_SB_ACCUM(tn, c);
|
---|
| 1195 | tn->subpointer -= 2;
|
---|
| 1196 | CURL_SB_TERM(tn);
|
---|
| 1197 |
|
---|
| 1198 | printoption(data, "In SUBOPTION processing, RCVD", CURL_IAC, c);
|
---|
| 1199 | suboption(conn); /* handle sub-option */
|
---|
| 1200 | tn->telrcv_state = CURL_TS_IAC;
|
---|
| 1201 | goto process_iac;
|
---|
| 1202 | }
|
---|
| 1203 | CURL_SB_ACCUM(tn, c);
|
---|
| 1204 | tn->telrcv_state = CURL_TS_SB;
|
---|
| 1205 | }
|
---|
| 1206 | else
|
---|
| 1207 | {
|
---|
| 1208 | CURL_SB_ACCUM(tn, CURL_IAC);
|
---|
| 1209 | CURL_SB_ACCUM(tn, CURL_SE);
|
---|
| 1210 | tn->subpointer -= 2;
|
---|
| 1211 | CURL_SB_TERM(tn);
|
---|
| 1212 | suboption(conn); /* handle sub-option */
|
---|
| 1213 | tn->telrcv_state = CURL_TS_DATA;
|
---|
| 1214 | }
|
---|
| 1215 | break;
|
---|
| 1216 | }
|
---|
| 1217 | ++in;
|
---|
| 1218 | }
|
---|
| 1219 | bufferflush();
|
---|
| 1220 | return CURLE_OK;
|
---|
| 1221 | }
|
---|
| 1222 |
|
---|
| 1223 | /* Escape and send a telnet data block */
|
---|
| 1224 | static CURLcode send_telnet_data(struct connectdata *conn,
|
---|
| 1225 | char *buffer, ssize_t nread)
|
---|
| 1226 | {
|
---|
| 1227 | ssize_t escapes, i, j, outlen;
|
---|
| 1228 | unsigned char *outbuf = NULL;
|
---|
| 1229 | CURLcode result = CURLE_OK;
|
---|
| 1230 | ssize_t bytes_written, total_written;
|
---|
| 1231 |
|
---|
| 1232 | /* Determine size of new buffer after escaping */
|
---|
| 1233 | escapes = 0;
|
---|
| 1234 | for(i = 0; i < nread; i++)
|
---|
| 1235 | if((unsigned char)buffer[i] == CURL_IAC)
|
---|
| 1236 | escapes++;
|
---|
| 1237 | outlen = nread + escapes;
|
---|
| 1238 |
|
---|
| 1239 | if(outlen == nread)
|
---|
| 1240 | outbuf = (unsigned char *)buffer;
|
---|
| 1241 | else {
|
---|
| 1242 | outbuf = malloc(nread + escapes + 1);
|
---|
| 1243 | if(!outbuf)
|
---|
| 1244 | return CURLE_OUT_OF_MEMORY;
|
---|
| 1245 |
|
---|
| 1246 | j = 0;
|
---|
| 1247 | for(i = 0; i < nread; i++) {
|
---|
| 1248 | outbuf[j++] = buffer[i];
|
---|
| 1249 | if((unsigned char)buffer[i] == CURL_IAC)
|
---|
| 1250 | outbuf[j++] = CURL_IAC;
|
---|
| 1251 | }
|
---|
| 1252 | outbuf[j] = '\0';
|
---|
| 1253 | }
|
---|
| 1254 |
|
---|
| 1255 | total_written = 0;
|
---|
| 1256 | while(!result && total_written < outlen) {
|
---|
| 1257 | /* Make sure socket is writable to avoid EWOULDBLOCK condition */
|
---|
| 1258 | struct pollfd pfd[1];
|
---|
| 1259 | pfd[0].fd = conn->sock[FIRSTSOCKET];
|
---|
| 1260 | pfd[0].events = POLLOUT;
|
---|
| 1261 | switch(Curl_poll(pfd, 1, -1)) {
|
---|
| 1262 | case -1: /* error, abort writing */
|
---|
| 1263 | case 0: /* timeout (will never happen) */
|
---|
| 1264 | result = CURLE_SEND_ERROR;
|
---|
| 1265 | break;
|
---|
| 1266 | default: /* write! */
|
---|
| 1267 | bytes_written = 0;
|
---|
| 1268 | result = Curl_write(conn, conn->sock[FIRSTSOCKET],
|
---|
| 1269 | outbuf + total_written,
|
---|
| 1270 | outlen - total_written,
|
---|
| 1271 | &bytes_written);
|
---|
| 1272 | total_written += bytes_written;
|
---|
| 1273 | break;
|
---|
| 1274 | }
|
---|
| 1275 | }
|
---|
| 1276 |
|
---|
| 1277 | /* Free malloc copy if escaped */
|
---|
| 1278 | if(outbuf != (unsigned char *)buffer)
|
---|
| 1279 | free(outbuf);
|
---|
| 1280 |
|
---|
| 1281 | return result;
|
---|
| 1282 | }
|
---|
| 1283 |
|
---|
| 1284 | static CURLcode telnet_done(struct connectdata *conn,
|
---|
| 1285 | CURLcode status, bool premature)
|
---|
| 1286 | {
|
---|
| 1287 | struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
|
---|
| 1288 | (void)status; /* unused */
|
---|
| 1289 | (void)premature; /* not used */
|
---|
| 1290 |
|
---|
| 1291 | if(!tn)
|
---|
| 1292 | return CURLE_OK;
|
---|
| 1293 |
|
---|
| 1294 | curl_slist_free_all(tn->telnet_vars);
|
---|
| 1295 | tn->telnet_vars = NULL;
|
---|
| 1296 |
|
---|
| 1297 | Curl_safefree(conn->data->req.protop);
|
---|
| 1298 |
|
---|
| 1299 | return CURLE_OK;
|
---|
| 1300 | }
|
---|
| 1301 |
|
---|
| 1302 | static CURLcode telnet_do(struct connectdata *conn, bool *done)
|
---|
| 1303 | {
|
---|
| 1304 | CURLcode result;
|
---|
| 1305 | struct Curl_easy *data = conn->data;
|
---|
| 1306 | curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
|
---|
| 1307 | #ifdef USE_WINSOCK
|
---|
| 1308 | HMODULE wsock2;
|
---|
| 1309 | WSOCK2_FUNC close_event_func;
|
---|
| 1310 | WSOCK2_FUNC create_event_func;
|
---|
| 1311 | WSOCK2_FUNC event_select_func;
|
---|
| 1312 | WSOCK2_FUNC enum_netevents_func;
|
---|
| 1313 | WSAEVENT event_handle;
|
---|
| 1314 | WSANETWORKEVENTS events;
|
---|
| 1315 | HANDLE stdin_handle;
|
---|
| 1316 | HANDLE objs[2];
|
---|
| 1317 | DWORD obj_count;
|
---|
| 1318 | DWORD wait_timeout;
|
---|
| 1319 | DWORD waitret;
|
---|
| 1320 | DWORD readfile_read;
|
---|
| 1321 | int err;
|
---|
| 1322 | #else
|
---|
| 1323 | int interval_ms;
|
---|
| 1324 | struct pollfd pfd[2];
|
---|
| 1325 | int poll_cnt;
|
---|
| 1326 | curl_off_t total_dl = 0;
|
---|
| 1327 | curl_off_t total_ul = 0;
|
---|
| 1328 | #endif
|
---|
| 1329 | ssize_t nread;
|
---|
| 1330 | struct curltime now;
|
---|
| 1331 | bool keepon = TRUE;
|
---|
| 1332 | char *buf = data->state.buffer;
|
---|
| 1333 | struct TELNET *tn;
|
---|
| 1334 |
|
---|
| 1335 | *done = TRUE; /* unconditionally */
|
---|
| 1336 |
|
---|
| 1337 | result = init_telnet(conn);
|
---|
| 1338 | if(result)
|
---|
| 1339 | return result;
|
---|
| 1340 |
|
---|
| 1341 | tn = (struct TELNET *)data->req.protop;
|
---|
| 1342 |
|
---|
| 1343 | result = check_telnet_options(conn);
|
---|
| 1344 | if(result)
|
---|
| 1345 | return result;
|
---|
| 1346 |
|
---|
| 1347 | #ifdef USE_WINSOCK
|
---|
| 1348 | /*
|
---|
| 1349 | ** This functionality only works with WinSock >= 2.0. So,
|
---|
| 1350 | ** make sure we have it.
|
---|
| 1351 | */
|
---|
| 1352 | result = check_wsock2(data);
|
---|
| 1353 | if(result)
|
---|
| 1354 | return result;
|
---|
| 1355 |
|
---|
| 1356 | /* OK, so we have WinSock 2.0. We need to dynamically */
|
---|
| 1357 | /* load ws2_32.dll and get the function pointers we need. */
|
---|
| 1358 | wsock2 = Curl_load_library(TEXT("WS2_32.DLL"));
|
---|
| 1359 | if(wsock2 == NULL) {
|
---|
| 1360 | failf(data, "failed to load WS2_32.DLL (%u)", GetLastError());
|
---|
| 1361 | return CURLE_FAILED_INIT;
|
---|
| 1362 | }
|
---|
| 1363 |
|
---|
| 1364 | /* Grab a pointer to WSACreateEvent */
|
---|
| 1365 | create_event_func = GetProcAddress(wsock2, "WSACreateEvent");
|
---|
| 1366 | if(create_event_func == NULL) {
|
---|
| 1367 | failf(data, "failed to find WSACreateEvent function (%u)", GetLastError());
|
---|
| 1368 | FreeLibrary(wsock2);
|
---|
| 1369 | return CURLE_FAILED_INIT;
|
---|
| 1370 | }
|
---|
| 1371 |
|
---|
| 1372 | /* And WSACloseEvent */
|
---|
| 1373 | close_event_func = GetProcAddress(wsock2, "WSACloseEvent");
|
---|
| 1374 | if(close_event_func == NULL) {
|
---|
| 1375 | failf(data, "failed to find WSACloseEvent function (%u)", GetLastError());
|
---|
| 1376 | FreeLibrary(wsock2);
|
---|
| 1377 | return CURLE_FAILED_INIT;
|
---|
| 1378 | }
|
---|
| 1379 |
|
---|
| 1380 | /* And WSAEventSelect */
|
---|
| 1381 | event_select_func = GetProcAddress(wsock2, "WSAEventSelect");
|
---|
| 1382 | if(event_select_func == NULL) {
|
---|
| 1383 | failf(data, "failed to find WSAEventSelect function (%u)", GetLastError());
|
---|
| 1384 | FreeLibrary(wsock2);
|
---|
| 1385 | return CURLE_FAILED_INIT;
|
---|
| 1386 | }
|
---|
| 1387 |
|
---|
| 1388 | /* And WSAEnumNetworkEvents */
|
---|
| 1389 | enum_netevents_func = GetProcAddress(wsock2, "WSAEnumNetworkEvents");
|
---|
| 1390 | if(enum_netevents_func == NULL) {
|
---|
| 1391 | failf(data, "failed to find WSAEnumNetworkEvents function (%u)",
|
---|
| 1392 | GetLastError());
|
---|
| 1393 | FreeLibrary(wsock2);
|
---|
| 1394 | return CURLE_FAILED_INIT;
|
---|
| 1395 | }
|
---|
| 1396 |
|
---|
| 1397 | /* We want to wait for both stdin and the socket. Since
|
---|
| 1398 | ** the select() function in winsock only works on sockets
|
---|
| 1399 | ** we have to use the WaitForMultipleObjects() call.
|
---|
| 1400 | */
|
---|
| 1401 |
|
---|
| 1402 | /* First, create a sockets event object */
|
---|
| 1403 | event_handle = (WSAEVENT)create_event_func();
|
---|
| 1404 | if(event_handle == WSA_INVALID_EVENT) {
|
---|
| 1405 | failf(data, "WSACreateEvent failed (%d)", SOCKERRNO);
|
---|
| 1406 | FreeLibrary(wsock2);
|
---|
| 1407 | return CURLE_FAILED_INIT;
|
---|
| 1408 | }
|
---|
| 1409 |
|
---|
| 1410 | /* Tell winsock what events we want to listen to */
|
---|
| 1411 | if(event_select_func(sockfd, event_handle, FD_READ|FD_CLOSE) ==
|
---|
| 1412 | SOCKET_ERROR) {
|
---|
| 1413 | close_event_func(event_handle);
|
---|
| 1414 | FreeLibrary(wsock2);
|
---|
| 1415 | return CURLE_OK;
|
---|
| 1416 | }
|
---|
| 1417 |
|
---|
| 1418 | /* The get the Windows file handle for stdin */
|
---|
| 1419 | stdin_handle = GetStdHandle(STD_INPUT_HANDLE);
|
---|
| 1420 |
|
---|
| 1421 | /* Create the list of objects to wait for */
|
---|
| 1422 | objs[0] = event_handle;
|
---|
| 1423 | objs[1] = stdin_handle;
|
---|
| 1424 |
|
---|
| 1425 | /* If stdin_handle is a pipe, use PeekNamedPipe() method to check it,
|
---|
| 1426 | else use the old WaitForMultipleObjects() way */
|
---|
| 1427 | if(GetFileType(stdin_handle) == FILE_TYPE_PIPE ||
|
---|
| 1428 | data->set.is_fread_set) {
|
---|
| 1429 | /* Don't wait for stdin_handle, just wait for event_handle */
|
---|
| 1430 | obj_count = 1;
|
---|
| 1431 | /* Check stdin_handle per 100 milliseconds */
|
---|
| 1432 | wait_timeout = 100;
|
---|
| 1433 | }
|
---|
| 1434 | else {
|
---|
| 1435 | obj_count = 2;
|
---|
| 1436 | wait_timeout = 1000;
|
---|
| 1437 | }
|
---|
| 1438 |
|
---|
| 1439 | /* Keep on listening and act on events */
|
---|
| 1440 | while(keepon) {
|
---|
| 1441 | const DWORD buf_size = (DWORD)data->set.buffer_size;
|
---|
| 1442 | waitret = WaitForMultipleObjects(obj_count, objs, FALSE, wait_timeout);
|
---|
| 1443 | switch(waitret) {
|
---|
| 1444 | case WAIT_TIMEOUT:
|
---|
| 1445 | {
|
---|
| 1446 | for(;;) {
|
---|
| 1447 | if(data->set.is_fread_set) {
|
---|
| 1448 | size_t n;
|
---|
| 1449 | /* read from user-supplied method */
|
---|
| 1450 | n = data->state.fread_func(buf, 1, buf_size, data->state.in);
|
---|
| 1451 | if(n == CURL_READFUNC_ABORT) {
|
---|
| 1452 | keepon = FALSE;
|
---|
| 1453 | result = CURLE_READ_ERROR;
|
---|
| 1454 | break;
|
---|
| 1455 | }
|
---|
| 1456 |
|
---|
| 1457 | if(n == CURL_READFUNC_PAUSE)
|
---|
| 1458 | break;
|
---|
| 1459 |
|
---|
| 1460 | if(n == 0) /* no bytes */
|
---|
| 1461 | break;
|
---|
| 1462 |
|
---|
| 1463 | readfile_read = (DWORD)n; /* fall thru with number of bytes read */
|
---|
| 1464 | }
|
---|
| 1465 | else {
|
---|
| 1466 | /* read from stdin */
|
---|
| 1467 | if(!PeekNamedPipe(stdin_handle, NULL, 0, NULL,
|
---|
| 1468 | &readfile_read, NULL)) {
|
---|
| 1469 | keepon = FALSE;
|
---|
| 1470 | result = CURLE_READ_ERROR;
|
---|
| 1471 | break;
|
---|
| 1472 | }
|
---|
| 1473 |
|
---|
| 1474 | if(!readfile_read)
|
---|
| 1475 | break;
|
---|
| 1476 |
|
---|
| 1477 | if(!ReadFile(stdin_handle, buf, buf_size,
|
---|
| 1478 | &readfile_read, NULL)) {
|
---|
| 1479 | keepon = FALSE;
|
---|
| 1480 | result = CURLE_READ_ERROR;
|
---|
| 1481 | break;
|
---|
| 1482 | }
|
---|
| 1483 | }
|
---|
| 1484 |
|
---|
| 1485 | result = send_telnet_data(conn, buf, readfile_read);
|
---|
| 1486 | if(result) {
|
---|
| 1487 | keepon = FALSE;
|
---|
| 1488 | break;
|
---|
| 1489 | }
|
---|
| 1490 | }
|
---|
| 1491 | }
|
---|
| 1492 | break;
|
---|
| 1493 |
|
---|
| 1494 | case WAIT_OBJECT_0 + 1:
|
---|
| 1495 | {
|
---|
| 1496 | if(!ReadFile(stdin_handle, buf, buf_size,
|
---|
| 1497 | &readfile_read, NULL)) {
|
---|
| 1498 | keepon = FALSE;
|
---|
| 1499 | result = CURLE_READ_ERROR;
|
---|
| 1500 | break;
|
---|
| 1501 | }
|
---|
| 1502 |
|
---|
| 1503 | result = send_telnet_data(conn, buf, readfile_read);
|
---|
| 1504 | if(result) {
|
---|
| 1505 | keepon = FALSE;
|
---|
| 1506 | break;
|
---|
| 1507 | }
|
---|
| 1508 | }
|
---|
| 1509 | break;
|
---|
| 1510 |
|
---|
| 1511 | case WAIT_OBJECT_0:
|
---|
| 1512 |
|
---|
| 1513 | events.lNetworkEvents = 0;
|
---|
| 1514 | if(SOCKET_ERROR == enum_netevents_func(sockfd, event_handle, &events)) {
|
---|
| 1515 | err = SOCKERRNO;
|
---|
| 1516 | if(err != EINPROGRESS) {
|
---|
| 1517 | infof(data, "WSAEnumNetworkEvents failed (%d)", err);
|
---|
| 1518 | keepon = FALSE;
|
---|
| 1519 | result = CURLE_READ_ERROR;
|
---|
| 1520 | }
|
---|
| 1521 | break;
|
---|
| 1522 | }
|
---|
| 1523 | if(events.lNetworkEvents & FD_READ) {
|
---|
| 1524 | /* read data from network */
|
---|
| 1525 | result = Curl_read(conn, sockfd, buf, data->set.buffer_size, &nread);
|
---|
| 1526 | /* read would've blocked. Loop again */
|
---|
| 1527 | if(result == CURLE_AGAIN)
|
---|
| 1528 | break;
|
---|
| 1529 | /* returned not-zero, this an error */
|
---|
| 1530 | else if(result) {
|
---|
| 1531 | keepon = FALSE;
|
---|
| 1532 | break;
|
---|
| 1533 | }
|
---|
| 1534 | /* returned zero but actually received 0 or less here,
|
---|
| 1535 | the server closed the connection and we bail out */
|
---|
| 1536 | else if(nread <= 0) {
|
---|
| 1537 | keepon = FALSE;
|
---|
| 1538 | break;
|
---|
| 1539 | }
|
---|
| 1540 |
|
---|
| 1541 | result = telrcv(conn, (unsigned char *) buf, nread);
|
---|
| 1542 | if(result) {
|
---|
| 1543 | keepon = FALSE;
|
---|
| 1544 | break;
|
---|
| 1545 | }
|
---|
| 1546 |
|
---|
| 1547 | /* Negotiate if the peer has started negotiating,
|
---|
| 1548 | otherwise don't. We don't want to speak telnet with
|
---|
| 1549 | non-telnet servers, like POP or SMTP. */
|
---|
| 1550 | if(tn->please_negotiate && !tn->already_negotiated) {
|
---|
| 1551 | negotiate(conn);
|
---|
| 1552 | tn->already_negotiated = 1;
|
---|
| 1553 | }
|
---|
| 1554 | }
|
---|
| 1555 | if(events.lNetworkEvents & FD_CLOSE) {
|
---|
| 1556 | keepon = FALSE;
|
---|
| 1557 | }
|
---|
| 1558 | break;
|
---|
| 1559 |
|
---|
| 1560 | }
|
---|
| 1561 |
|
---|
| 1562 | if(data->set.timeout) {
|
---|
| 1563 | now = Curl_now();
|
---|
| 1564 | if(Curl_timediff(now, conn->created) >= data->set.timeout) {
|
---|
| 1565 | failf(data, "Time-out");
|
---|
| 1566 | result = CURLE_OPERATION_TIMEDOUT;
|
---|
| 1567 | keepon = FALSE;
|
---|
| 1568 | }
|
---|
| 1569 | }
|
---|
| 1570 | }
|
---|
| 1571 |
|
---|
| 1572 | /* We called WSACreateEvent, so call WSACloseEvent */
|
---|
| 1573 | if(!close_event_func(event_handle)) {
|
---|
| 1574 | infof(data, "WSACloseEvent failed (%d)", SOCKERRNO);
|
---|
| 1575 | }
|
---|
| 1576 |
|
---|
| 1577 | /* "Forget" pointers into the library we're about to free */
|
---|
| 1578 | create_event_func = NULL;
|
---|
| 1579 | close_event_func = NULL;
|
---|
| 1580 | event_select_func = NULL;
|
---|
| 1581 | enum_netevents_func = NULL;
|
---|
| 1582 |
|
---|
| 1583 | /* We called LoadLibrary, so call FreeLibrary */
|
---|
| 1584 | if(!FreeLibrary(wsock2))
|
---|
| 1585 | infof(data, "FreeLibrary(wsock2) failed (%u)", GetLastError());
|
---|
| 1586 | #else
|
---|
| 1587 | pfd[0].fd = sockfd;
|
---|
| 1588 | pfd[0].events = POLLIN;
|
---|
| 1589 |
|
---|
| 1590 | if(data->set.is_fread_set) {
|
---|
| 1591 | poll_cnt = 1;
|
---|
| 1592 | interval_ms = 100; /* poll user-supplied read function */
|
---|
| 1593 | }
|
---|
| 1594 | else {
|
---|
| 1595 | /* really using fread, so infile is a FILE* */
|
---|
| 1596 | pfd[1].fd = fileno((FILE *)data->state.in);
|
---|
| 1597 | pfd[1].events = POLLIN;
|
---|
| 1598 | poll_cnt = 2;
|
---|
| 1599 | interval_ms = 1 * 1000;
|
---|
| 1600 | }
|
---|
| 1601 |
|
---|
| 1602 | while(keepon) {
|
---|
| 1603 | switch(Curl_poll(pfd, poll_cnt, interval_ms)) {
|
---|
| 1604 | case -1: /* error, stop reading */
|
---|
| 1605 | keepon = FALSE;
|
---|
| 1606 | continue;
|
---|
| 1607 | case 0: /* timeout */
|
---|
| 1608 | pfd[0].revents = 0;
|
---|
| 1609 | pfd[1].revents = 0;
|
---|
| 1610 | /* fall through */
|
---|
| 1611 | default: /* read! */
|
---|
| 1612 | if(pfd[0].revents & POLLIN) {
|
---|
| 1613 | /* read data from network */
|
---|
| 1614 | result = Curl_read(conn, sockfd, buf, data->set.buffer_size, &nread);
|
---|
| 1615 | /* read would've blocked. Loop again */
|
---|
| 1616 | if(result == CURLE_AGAIN)
|
---|
| 1617 | break;
|
---|
| 1618 | /* returned not-zero, this an error */
|
---|
| 1619 | if(result) {
|
---|
| 1620 | keepon = FALSE;
|
---|
| 1621 | break;
|
---|
| 1622 | }
|
---|
| 1623 | /* returned zero but actually received 0 or less here,
|
---|
| 1624 | the server closed the connection and we bail out */
|
---|
| 1625 | else if(nread <= 0) {
|
---|
| 1626 | keepon = FALSE;
|
---|
| 1627 | break;
|
---|
| 1628 | }
|
---|
| 1629 |
|
---|
| 1630 | total_dl += nread;
|
---|
| 1631 | Curl_pgrsSetDownloadCounter(data, total_dl);
|
---|
| 1632 | result = telrcv(conn, (unsigned char *)buf, nread);
|
---|
| 1633 | if(result) {
|
---|
| 1634 | keepon = FALSE;
|
---|
| 1635 | break;
|
---|
| 1636 | }
|
---|
| 1637 |
|
---|
| 1638 | /* Negotiate if the peer has started negotiating,
|
---|
| 1639 | otherwise don't. We don't want to speak telnet with
|
---|
| 1640 | non-telnet servers, like POP or SMTP. */
|
---|
| 1641 | if(tn->please_negotiate && !tn->already_negotiated) {
|
---|
| 1642 | negotiate(conn);
|
---|
| 1643 | tn->already_negotiated = 1;
|
---|
| 1644 | }
|
---|
| 1645 | }
|
---|
| 1646 |
|
---|
| 1647 | nread = 0;
|
---|
| 1648 | if(poll_cnt == 2) {
|
---|
| 1649 | if(pfd[1].revents & POLLIN) { /* read from in file */
|
---|
| 1650 | nread = read(pfd[1].fd, buf, data->set.buffer_size);
|
---|
| 1651 | }
|
---|
| 1652 | }
|
---|
| 1653 | else {
|
---|
| 1654 | /* read from user-supplied method */
|
---|
| 1655 | nread = (int)data->state.fread_func(buf, 1, data->set.buffer_size,
|
---|
| 1656 | data->state.in);
|
---|
| 1657 | if(nread == CURL_READFUNC_ABORT) {
|
---|
| 1658 | keepon = FALSE;
|
---|
| 1659 | break;
|
---|
| 1660 | }
|
---|
| 1661 | if(nread == CURL_READFUNC_PAUSE)
|
---|
| 1662 | break;
|
---|
| 1663 | }
|
---|
| 1664 |
|
---|
| 1665 | if(nread > 0) {
|
---|
| 1666 | result = send_telnet_data(conn, buf, nread);
|
---|
| 1667 | if(result) {
|
---|
| 1668 | keepon = FALSE;
|
---|
| 1669 | break;
|
---|
| 1670 | }
|
---|
| 1671 | total_ul += nread;
|
---|
| 1672 | Curl_pgrsSetUploadCounter(data, total_ul);
|
---|
| 1673 | }
|
---|
| 1674 | else if(nread < 0)
|
---|
| 1675 | keepon = FALSE;
|
---|
| 1676 |
|
---|
| 1677 | break;
|
---|
| 1678 | } /* poll switch statement */
|
---|
| 1679 |
|
---|
| 1680 | if(data->set.timeout) {
|
---|
| 1681 | now = Curl_now();
|
---|
| 1682 | if(Curl_timediff(now, conn->created) >= data->set.timeout) {
|
---|
| 1683 | failf(data, "Time-out");
|
---|
| 1684 | result = CURLE_OPERATION_TIMEDOUT;
|
---|
| 1685 | keepon = FALSE;
|
---|
| 1686 | }
|
---|
| 1687 | }
|
---|
| 1688 |
|
---|
| 1689 | if(Curl_pgrsUpdate(conn)) {
|
---|
| 1690 | result = CURLE_ABORTED_BY_CALLBACK;
|
---|
| 1691 | break;
|
---|
| 1692 | }
|
---|
| 1693 | }
|
---|
| 1694 | #endif
|
---|
| 1695 | /* mark this as "no further transfer wanted" */
|
---|
| 1696 | Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
---|
| 1697 |
|
---|
| 1698 | return result;
|
---|
| 1699 | }
|
---|
| 1700 | #endif
|
---|