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1 /* ========================================================================
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2 * Copyright 1988-2008 University of Washington
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3 *
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4 * Licensed under the Apache License, Version 2.0 (the "License");
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5 * you may not use this file except in compliance with the License.
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6 * You may obtain a copy of the License at
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7 *
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8 * http://www.apache.org/licenses/LICENSE-2.0
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9 *
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10 *
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11 * ========================================================================
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12 */
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13
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14 /*
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15 * Program: UNIX TCP/IP routines
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16 *
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17 * Author: Mark Crispin
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18 * Networks and Distributed Computing
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19 * Computing & Communications
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20 * University of Washington
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21 * Administration Building, AG-44
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22 * Seattle, WA 98195
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23 * Internet: MRC@CAC.Washington.EDU
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24 *
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25 * Date: 1 August 1988
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26 * Last Edited: 13 January 2008
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27 */
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28
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29 #include "ip_unix.c"
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30
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31 #undef write /* don't use redefined write() */
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32
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33 static tcptimeout_t tmoh = NIL; /* TCP timeout handler routine */
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34 static long ttmo_open = 0; /* TCP timeouts, in seconds */
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35 static long ttmo_read = 0;
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36 static long ttmo_write = 0;
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37 static long rshtimeout = 15; /* rsh timeout */
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38 static char *rshcommand = NIL; /* rsh command */
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39 static char *rshpath = NIL; /* rsh path */
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40 static long sshtimeout = 15; /* ssh timeout */
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41 static char *sshcommand = NIL; /* ssh command */
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42 static char *sshpath = NIL; /* ssh path */
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43 static long allowreversedns = T;/* allow reverse DNS lookup */
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44 static long tcpdebug = NIL; /* extra TCP debugging telemetry */
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45 static char *myClientAddr = NIL;/* client IP address */
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46 static char *myClientHost = NIL;/* client DNS name */
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47 static long myClientPort = -1; /* client port number */
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48 static char *myServerAddr = NIL;/* server IP address */
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49 static char *myServerHost = NIL;/* server DNS name */
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50 static long myServerPort = -1; /* server port number */
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51
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52 extern long maxposint; /* get this from write.c */
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53
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54 /* Local function prototypes */
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55
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56 int tcp_socket_open (int family,void *adr,size_t adrlen,unsigned short port,
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57 char *tmp,int *ctr,char *hst);
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58 static char *tcp_getline_work (TCPSTREAM *stream,unsigned long *size,
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59 long *contd);
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60 long tcp_abort (TCPSTREAM *stream);
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61 char *tcp_name (struct sockaddr *sadr,long flag);
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62 char *tcp_name_valid (char *s);
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63
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64 /* TCP/IP manipulate parameters
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65 * Accepts: function code
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66 * function-dependent value
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67 * Returns: function-dependent return value
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68 */
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69
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70 void *tcp_parameters (long function,void *value)
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71 {
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72 void *ret = NIL;
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73 switch ((int) function) {
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74 case SET_TIMEOUT:
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75 tmoh = (tcptimeout_t) value;
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76 case GET_TIMEOUT:
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77 ret = (void *) tmoh;
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78 break;
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79 case SET_OPENTIMEOUT:
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80 ttmo_open = (long) value;
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81 case GET_OPENTIMEOUT:
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82 ret = (void *) ttmo_open;
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83 break;
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84 case SET_READTIMEOUT:
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85 ttmo_read = (long) value;
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86 case GET_READTIMEOUT:
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87 ret = (void *) ttmo_read;
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88 break;
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89 case SET_WRITETIMEOUT:
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90 ttmo_write = (long) value;
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91 case GET_WRITETIMEOUT:
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92 ret = (void *) ttmo_write;
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93 break;
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94 case SET_ALLOWREVERSEDNS:
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95 allowreversedns = (long) value;
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96 case GET_ALLOWREVERSEDNS:
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97 ret = (void *) allowreversedns;
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98 break;
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99 case SET_TCPDEBUG:
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100 tcpdebug = (long) value;
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101 case GET_TCPDEBUG:
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102 ret = (void *) tcpdebug;
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103 break;
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104
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105 case SET_RSHTIMEOUT:
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106 rshtimeout = (long) value;
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107 case GET_RSHTIMEOUT:
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108 ret = (void *) rshtimeout;
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109 break;
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110 case SET_RSHCOMMAND:
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111 if (rshcommand) fs_give ((void **) &rshcommand);
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112 rshcommand = cpystr ((char *) value);
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113 case GET_RSHCOMMAND:
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114 ret = (void *) rshcommand;
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115 break;
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116 case SET_RSHPATH:
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117 if (rshpath) fs_give ((void **) &rshpath);
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118 rshpath = cpystr ((char *) value);
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119 case GET_RSHPATH:
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120 ret = (void *) rshpath;
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121 break;
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122 case SET_SSHTIMEOUT:
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123 sshtimeout = (long) value;
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124 case GET_SSHTIMEOUT:
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125 ret = (void *) sshtimeout;
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126 break;
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127 case SET_SSHCOMMAND:
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128 if (sshcommand) fs_give ((void **) &sshcommand);
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129 sshcommand = cpystr ((char *) value);
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130 case GET_SSHCOMMAND:
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131 ret = (void *) sshcommand;
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132 break;
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133 case SET_SSHPATH:
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134 if (sshpath) fs_give ((void **) &sshpath);
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135 sshpath = cpystr ((char *) value);
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136 case GET_SSHPATH:
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137 ret = (void *) sshpath;
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138 break;
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139 }
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140 return ret;
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141 }
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142
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143 /* TCP/IP open
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144 * Accepts: host name
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145 * contact service name
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146 * contact port number and optional silent flag
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147 * Returns: TCP/IP stream if success else NIL
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148 */
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149
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150 TCPSTREAM *tcp_open (char *host,char *service,unsigned long port)
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151 {
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152 TCPSTREAM *stream = NIL;
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153 int family;
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154 int sock = -1;
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155 int ctr = 0;
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156 int silent = (port & NET_SILENT) ? T : NIL;
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157 int *ctrp = (port & NET_NOOPENTIMEOUT) ? NIL : &ctr;
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158 char *s,*hostname,tmp[MAILTMPLEN];
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159 void *adr;
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160 size_t adrlen;
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161 struct servent *sv = NIL;
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162 blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
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163 void *data,*next;
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164 port &= 0xffff; /* erase flags */
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165 /* lookup service */
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166 if (service && (sv = getservbyname (service,"tcp")))
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167 port = ntohs (sv->s_port);
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168 /* The domain literal form is used (rather than simply the dotted decimal
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169 as with other Unix programs) because it has to be a valid "host name"
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170 in mailsystem terminology. */
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171 /* look like domain literal? */
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172 if (host[0] == '[' && host[(strlen (host))-1] == ']') {
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173 strcpy (tmp,host+1); /* yes, copy number part */
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174 tmp[(strlen (tmp))-1] = '\0';
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175 if (adr = ip_stringtoaddr (tmp,&adrlen,&family)) {
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176 (*bn) (BLOCK_TCPOPEN,NIL);
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177 /* get an open socket for this system */
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178 sock = tcp_socket_open (family,adr,adrlen,port,tmp,ctrp,hostname = host);
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179 (*bn) (BLOCK_NONE,NIL);
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180 fs_give ((void **) &adr);
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181 }
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182 else sprintf (tmp,"Bad format domain-literal: %.80s",host);
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183 }
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184
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185 else { /* lookup host name */
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186 if (tcpdebug) {
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187 sprintf (tmp,"DNS resolution %.80s",host);
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188 mm_log (tmp,TCPDEBUG);
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189 }
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190 (*bn) (BLOCK_DNSLOOKUP,NIL);/* quell alarms */
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191 data = (*bn) (BLOCK_SENSITIVE,NIL);
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192 if (!(s = ip_nametoaddr (host,&adrlen,&family,&hostname,&next)))
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193 sprintf (tmp,"No such host as %.80s",host);
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194 (*bn) (BLOCK_NONSENSITIVE,data);
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195 (*bn) (BLOCK_NONE,NIL);
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196 if (s) { /* DNS resolution won? */
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197 if (tcpdebug) mm_log ("DNS resolution done",TCPDEBUG);
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198 do {
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199 (*bn) (BLOCK_TCPOPEN,NIL);
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200 if (((sock = tcp_socket_open (family,s,adrlen,port,tmp,ctrp,
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201 hostname)) < 0) &&
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202 (s = ip_nametoaddr (NIL,&adrlen,&family,&hostname,&next)) &&
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203 !silent) mm_log (tmp,WARN);
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204 (*bn) (BLOCK_NONE,NIL);
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205 } while ((sock < 0) && s);/* repeat until success or no more addreses */
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206 }
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207 }
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208 if (sock >= 0) { /* won */
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209 stream = (TCPSTREAM *) memset (fs_get (sizeof (TCPSTREAM)),0,
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210 sizeof (TCPSTREAM));
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211 stream->port = port; /* port number */
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212 /* init sockets */
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213 stream->tcpsi = stream->tcpso = sock;
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214 /* stash in the snuck-in byte */
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215 if (stream->ictr = ctr) *(stream->iptr = stream->ibuf) = tmp[0];
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216 /* copy official host name */
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217 stream->host = cpystr (hostname);
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218 if (tcpdebug) mm_log ("Stream open and ready for read",TCPDEBUG);
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219 }
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220 else if (!silent) mm_log (tmp,ERROR);
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221 return stream; /* return success */
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222 }
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223
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yuuji@0
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224 /* Open a TCP socket
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225 * Accepts: protocol family
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226 * address to connect to
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yuuji@0
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227 * address length
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yuuji@0
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228 * port
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229 * scratch buffer
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230 * pointer to "first byte read in" storage or NIL
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231 * host name for error message
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232 * Returns: socket if success, else -1 with error string in scratch buffer
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233 */
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234
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235 int tcp_socket_open (int family,void *adr,size_t adrlen,unsigned short port,
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236 char *tmp,int *ctr,char *hst)
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237 {
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238 int i,ti,sock,flgs;
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239 size_t len;
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240 time_t now;
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241 struct protoent *pt = getprotobyname ("tcp");
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242 fd_set fds,efds;
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243 struct timeval tmo;
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244 struct sockaddr *sadr = ip_sockaddr (family,adr,adrlen,port,&len);
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245 blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
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246 /* fetid Solaris */
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247 void *data = (*bn) (BLOCK_SENSITIVE,NIL);
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248 sprintf (tmp,"Trying IP address [%s]",ip_sockaddrtostring (sadr));
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249 mm_log (tmp,NIL);
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250 /* make a socket */
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251 if ((sock = socket (sadr->sa_family,SOCK_STREAM,pt ? pt->p_proto : 0)) < 0) {
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252 sprintf (tmp,"Unable to create TCP socket: %s",strerror (errno));
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253 (*bn) (BLOCK_NONSENSITIVE,data);
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254 }
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255 else if (sock >= FD_SETSIZE) {/* unselectable sockets are useless */
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256 sprintf (tmp,"Unable to create selectable TCP socket (%d >= %d)",
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257 sock,FD_SETSIZE);
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258 (*bn) (BLOCK_NONSENSITIVE,data);
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259 close (sock);
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260 sock = -1;
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261 errno = EMFILE;
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262 }
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263
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264 else { /* get current socket flags */
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265 flgs = fcntl (sock,F_GETFL,0);
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266 /* set non-blocking if want open timeout */
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267 if (ctr) fcntl (sock,F_SETFL,flgs | FNDELAY);
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268 /* open connection */
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269 while ((i = connect (sock,sadr,len)) < 0 && (errno == EINTR));
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270 (*bn) (BLOCK_NONSENSITIVE,data);
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271 if (i < 0) switch (errno) { /* failed? */
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272 case EAGAIN: /* DG brain damage */
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273 case EINPROGRESS: /* what we expect to happen */
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274 case EALREADY: /* or another form of it */
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275 case EISCONN: /* restart after interrupt? */
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276 case EADDRINUSE: /* restart after interrupt? */
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277 break; /* well, not really, it was interrupted */
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278 default:
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279 sprintf (tmp,"Can't connect to %.80s,%u: %s",hst,(unsigned int) port,
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280 strerror (errno));
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281 close (sock); /* flush socket */
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282 sock = -1;
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283 }
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284 if ((sock >= 0) && ctr) { /* want open timeout? */
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285 now = time (0); /* open timeout */
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286 ti = ttmo_open ? now + ttmo_open : 0;
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287 tmo.tv_usec = 0;
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288 FD_ZERO (&fds); /* initialize selection vector */
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289 FD_ZERO (&efds); /* handle errors too */
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290 FD_SET (sock,&fds); /* block for error or readable */
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291 FD_SET (sock,&efds);
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292 do { /* block under timeout */
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293 tmo.tv_sec = ti ? ti - now : 0;
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294 i = select (sock+1,&fds,NIL,&efds,ti ? &tmo : NIL);
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295 now = time (0); /* fake timeout if interrupt & time expired */
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296 if ((i < 0) && (errno == EINTR) && ti && (ti <= now)) i = 0;
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297 } while ((i < 0) && (errno == EINTR));
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298 if (i > 0) { /* success, make sure really connected */
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299 /* restore blocking status */
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300 fcntl (sock,F_SETFL,flgs);
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yuuji@0
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301 /* This used to be a zero-byte read(), but that crashes Solaris */
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yuuji@0
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302 /* get socket status */
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yuuji@0
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303 while (((i = *ctr = read (sock,tmp,1)) < 0) && (errno == EINTR));
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304 }
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305 if (i <= 0) { /* timeout or error? */
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306 i = i ? errno : ETIMEDOUT;/* determine error code */
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307 close (sock); /* flush socket */
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308 sock = -1;
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309 errno = i; /* return error code */
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310 sprintf (tmp,"Connection failed to %.80s,%lu: %s",hst,
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311 (unsigned long) port,strerror (errno));
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312 }
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313 }
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314 }
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315 fs_give ((void **) &sadr);
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316 return sock; /* return the socket */
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317 }
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318
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yuuji@0
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319 /* TCP/IP authenticated open
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yuuji@0
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320 * Accepts: host name
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yuuji@0
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321 * service name
|
yuuji@0
|
322 * returned user name buffer
|
yuuji@0
|
323 * Returns: TCP/IP stream if success else NIL
|
yuuji@0
|
324 */
|
yuuji@0
|
325
|
yuuji@0
|
326 #define MAXARGV 20
|
yuuji@0
|
327
|
yuuji@0
|
328 TCPSTREAM *tcp_aopen (NETMBX *mb,char *service,char *usrbuf)
|
yuuji@0
|
329 {
|
yuuji@0
|
330 TCPSTREAM *stream = NIL;
|
yuuji@0
|
331 void *adr;
|
yuuji@0
|
332 char host[MAILTMPLEN],tmp[MAILTMPLEN],*path,*argv[MAXARGV+1],*r;
|
yuuji@0
|
333 int i,ti,pipei[2],pipeo[2];
|
yuuji@0
|
334 size_t len;
|
yuuji@0
|
335 time_t now;
|
yuuji@0
|
336 struct timeval tmo;
|
yuuji@0
|
337 fd_set fds,efds;
|
yuuji@0
|
338 blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
|
yuuji@0
|
339 #ifdef SSHPATH /* ssh path defined yet? */
|
yuuji@0
|
340 if (!sshpath) sshpath = cpystr (SSHPATH);
|
yuuji@0
|
341 #endif
|
yuuji@0
|
342 #ifdef RSHPATH /* rsh path defined yet? */
|
yuuji@0
|
343 if (!rshpath) rshpath = cpystr (RSHPATH);
|
yuuji@0
|
344 #endif
|
yuuji@0
|
345 if (*service == '*') { /* want ssh? */
|
yuuji@0
|
346 /* return immediately if ssh disabled */
|
yuuji@0
|
347 if (!(sshpath && (ti = sshtimeout))) return NIL;
|
yuuji@0
|
348 /* ssh command prototype defined yet? */
|
yuuji@0
|
349 if (!sshcommand) sshcommand = cpystr ("%s %s -l %s exec /etc/r%sd");
|
yuuji@0
|
350 }
|
yuuji@0
|
351 /* want rsh? */
|
yuuji@0
|
352 else if (rshpath && (ti = rshtimeout)) {
|
yuuji@0
|
353 /* rsh command prototype defined yet? */
|
yuuji@0
|
354 if (!rshcommand) rshcommand = cpystr ("%s %s -l %s exec /etc/r%sd");
|
yuuji@0
|
355 }
|
yuuji@0
|
356 else return NIL; /* rsh disabled */
|
yuuji@0
|
357 /* look like domain literal? */
|
yuuji@0
|
358 if (mb->host[0] == '[' && mb->host[i = (strlen (mb->host))-1] == ']') {
|
yuuji@0
|
359 strcpy (host,mb->host+1); /* yes, copy without brackets */
|
yuuji@0
|
360 host[i-1] = '\0';
|
yuuji@0
|
361 /* validate domain literal */
|
yuuji@0
|
362 if (adr = ip_stringtoaddr (host,&len,&i)) fs_give ((void **) &adr);
|
yuuji@0
|
363 else {
|
yuuji@0
|
364 sprintf (tmp,"Bad format domain-literal: %.80s",host);
|
yuuji@0
|
365 mm_log (tmp,ERROR);
|
yuuji@0
|
366 return NIL;
|
yuuji@0
|
367 }
|
yuuji@0
|
368 }
|
yuuji@0
|
369 else strcpy (host,tcp_canonical (mb->host));
|
yuuji@0
|
370
|
yuuji@0
|
371 if (*service == '*') /* build ssh command */
|
yuuji@0
|
372 sprintf (tmp,sshcommand,sshpath,host,
|
yuuji@0
|
373 mb->user[0] ? mb->user : myusername (),service + 1);
|
yuuji@0
|
374 else sprintf (tmp,rshcommand,rshpath,host,
|
yuuji@0
|
375 mb->user[0] ? mb->user : myusername (),service);
|
yuuji@0
|
376 if (tcpdebug) {
|
yuuji@0
|
377 char msg[MAILTMPLEN];
|
yuuji@0
|
378 sprintf (msg,"Trying %.100s",tmp);
|
yuuji@0
|
379 mm_log (msg,TCPDEBUG);
|
yuuji@0
|
380 }
|
yuuji@0
|
381 /* parse command into argv */
|
yuuji@0
|
382 for (i = 1,path = argv[0] = strtok_r (tmp," ",&r);
|
yuuji@0
|
383 (i < MAXARGV) && (argv[i] = strtok_r (NIL," ",&r)); i++);
|
yuuji@0
|
384 argv[i] = NIL; /* make sure argv tied off */
|
yuuji@0
|
385 /* make command pipes */
|
yuuji@0
|
386 if (pipe (pipei) < 0) return NIL;
|
yuuji@0
|
387 if ((pipei[0] >= FD_SETSIZE) || (pipei[1] >= FD_SETSIZE) ||
|
yuuji@0
|
388 (pipe (pipeo) < 0)) {
|
yuuji@0
|
389 close (pipei[0]); close (pipei[1]);
|
yuuji@0
|
390 return NIL;
|
yuuji@0
|
391 }
|
yuuji@0
|
392 (*bn) (BLOCK_TCPOPEN,NIL); /* quell alarm up here for NeXT */
|
yuuji@0
|
393 if ((pipeo[0] >= FD_SETSIZE) || (pipeo[1] >= FD_SETSIZE) ||
|
yuuji@0
|
394 ((i = fork ()) < 0)) { /* make inferior process */
|
yuuji@0
|
395 close (pipei[0]); close (pipei[1]);
|
yuuji@0
|
396 close (pipeo[0]); close (pipeo[1]);
|
yuuji@0
|
397 (*bn) (BLOCK_NONE,NIL);
|
yuuji@0
|
398 return NIL;
|
yuuji@0
|
399 }
|
yuuji@0
|
400 if (!i) { /* if child */
|
yuuji@0
|
401 alarm (0); /* never have alarms in children */
|
yuuji@0
|
402 if (!fork ()) { /* make grandchild so it's inherited by init */
|
yuuji@0
|
403 int cf; /* don't alter parent vars in case vfork() */
|
yuuji@0
|
404 int maxfd = max (20,max (max(pipei[0],pipei[1]),max(pipeo[0],pipeo[1])));
|
yuuji@0
|
405 dup2 (pipei[1],1); /* parent's input is my output */
|
yuuji@0
|
406 dup2 (pipei[1],2); /* parent's input is my error output too */
|
yuuji@0
|
407 dup2 (pipeo[0],0); /* parent's output is my input */
|
yuuji@0
|
408 /* close all unnecessary descriptors */
|
yuuji@0
|
409 for (cf = 3; cf <= maxfd; cf++) close (cf);
|
yuuji@0
|
410 setpgrp (0,getpid ()); /* be our own process group */
|
yuuji@0
|
411 _exit (execv (path,argv));/* now run it */
|
yuuji@0
|
412 }
|
yuuji@0
|
413 _exit (1); /* child is done */
|
yuuji@0
|
414 }
|
yuuji@0
|
415 grim_pid_reap (i,NIL); /* reap child; grandchild now owned by init */
|
yuuji@0
|
416 close (pipei[1]); /* close child's side of the pipes */
|
yuuji@0
|
417 close (pipeo[0]);
|
yuuji@0
|
418
|
yuuji@0
|
419 /* create TCP/IP stream */
|
yuuji@0
|
420 stream = (TCPSTREAM *) memset (fs_get (sizeof (TCPSTREAM)),0,
|
yuuji@0
|
421 sizeof (TCPSTREAM));
|
yuuji@0
|
422 /* copy remote host name from argument */
|
yuuji@0
|
423 stream->remotehost = cpystr (stream->host = cpystr (host));
|
yuuji@0
|
424 stream->tcpsi = pipei[0]; /* init sockets */
|
yuuji@0
|
425 stream->tcpso = pipeo[1];
|
yuuji@0
|
426 stream->ictr = 0; /* init input counter */
|
yuuji@0
|
427 stream->port = 0xffffffff; /* no port number */
|
yuuji@0
|
428 ti += now = time (0); /* open timeout */
|
yuuji@0
|
429 tmo.tv_usec = 0; /* initialize usec timeout */
|
yuuji@0
|
430 FD_ZERO (&fds); /* initialize selection vector */
|
yuuji@0
|
431 FD_ZERO (&efds); /* handle errors too */
|
yuuji@0
|
432 FD_SET (stream->tcpsi,&fds); /* set bit in selection vector */
|
yuuji@0
|
433 FD_SET (stream->tcpsi,&efds); /* set bit in error selection vector */
|
yuuji@0
|
434 FD_SET (stream->tcpso,&efds); /* set bit in error selection vector */
|
yuuji@0
|
435 do { /* block under timeout */
|
yuuji@0
|
436 tmo.tv_sec = ti - now;
|
yuuji@0
|
437 i = select (max (stream->tcpsi,stream->tcpso)+1,&fds,NIL,&efds,&tmo);
|
yuuji@0
|
438 now = time (0); /* fake timeout if interrupt & time expired */
|
yuuji@0
|
439 if ((i < 0) && (errno == EINTR) && ti && (ti <= now)) i = 0;
|
yuuji@0
|
440 } while ((i < 0) && (errno == EINTR));
|
yuuji@0
|
441 if (i <= 0) { /* timeout or error? */
|
yuuji@0
|
442 sprintf (tmp,i ? "error in %s to IMAP server" :
|
yuuji@0
|
443 "%s to IMAP server timed out",(*service == '*') ? "ssh" : "rsh");
|
yuuji@0
|
444 mm_log (tmp,WARN);
|
yuuji@0
|
445 tcp_close (stream); /* punt stream */
|
yuuji@0
|
446 stream = NIL;
|
yuuji@0
|
447 }
|
yuuji@0
|
448 (*bn) (BLOCK_NONE,NIL);
|
yuuji@0
|
449 /* return user name */
|
yuuji@0
|
450 strcpy (usrbuf,mb->user[0] ? mb->user : myusername ());
|
yuuji@0
|
451 return stream; /* return success */
|
yuuji@0
|
452 }
|
yuuji@0
|
453
|
yuuji@0
|
454 /* TCP receive line
|
yuuji@0
|
455 * Accepts: TCP stream
|
yuuji@0
|
456 * Returns: text line string or NIL if failure
|
yuuji@0
|
457 */
|
yuuji@0
|
458
|
yuuji@0
|
459 char *tcp_getline (TCPSTREAM *stream)
|
yuuji@0
|
460 {
|
yuuji@0
|
461 unsigned long n,contd;
|
yuuji@0
|
462 char *ret = tcp_getline_work (stream,&n,&contd);
|
yuuji@0
|
463 if (ret && contd) { /* got a line needing continuation? */
|
yuuji@0
|
464 STRINGLIST *stl = mail_newstringlist ();
|
yuuji@0
|
465 STRINGLIST *stc = stl;
|
yuuji@0
|
466 do { /* collect additional lines */
|
yuuji@0
|
467 stc->text.data = (unsigned char *) ret;
|
yuuji@0
|
468 stc->text.size = n;
|
yuuji@0
|
469 stc = stc->next = mail_newstringlist ();
|
yuuji@0
|
470 ret = tcp_getline_work (stream,&n,&contd);
|
yuuji@0
|
471 } while (ret && contd);
|
yuuji@0
|
472 if (ret) { /* stash final part of line on list */
|
yuuji@0
|
473 stc->text.data = (unsigned char *) ret;
|
yuuji@0
|
474 stc->text.size = n;
|
yuuji@0
|
475 /* determine how large a buffer we need */
|
yuuji@0
|
476 for (n = 0, stc = stl; stc; stc = stc->next) n += stc->text.size;
|
yuuji@0
|
477 ret = fs_get (n + 1); /* copy parts into buffer */
|
yuuji@0
|
478 for (n = 0, stc = stl; stc; n += stc->text.size, stc = stc->next)
|
yuuji@0
|
479 memcpy (ret + n,stc->text.data,stc->text.size);
|
yuuji@0
|
480 ret[n] = '\0';
|
yuuji@0
|
481 }
|
yuuji@0
|
482 mail_free_stringlist (&stl);/* either way, done with list */
|
yuuji@0
|
483 }
|
yuuji@0
|
484 return ret;
|
yuuji@0
|
485 }
|
yuuji@0
|
486
|
yuuji@0
|
487 /* TCP receive line or partial line
|
yuuji@0
|
488 * Accepts: TCP stream
|
yuuji@0
|
489 * pointer to return size
|
yuuji@0
|
490 * pointer to return continuation flag
|
yuuji@0
|
491 * Returns: text line string, size and continuation flag, or NIL if failure
|
yuuji@0
|
492 */
|
yuuji@0
|
493
|
yuuji@0
|
494 static char *tcp_getline_work (TCPSTREAM *stream,unsigned long *size,
|
yuuji@0
|
495 long *contd)
|
yuuji@0
|
496 {
|
yuuji@0
|
497 unsigned long n;
|
yuuji@0
|
498 char *s,*ret,c,d;
|
yuuji@0
|
499 *contd = NIL; /* assume no continuation */
|
yuuji@0
|
500 /* make sure have data */
|
yuuji@0
|
501 if (!tcp_getdata (stream)) return NIL;
|
yuuji@0
|
502 for (s = stream->iptr, n = 0, c = '\0'; stream->ictr--; n++, c = d) {
|
yuuji@0
|
503 d = *stream->iptr++; /* slurp another character */
|
yuuji@0
|
504 if ((c == '\015') && (d == '\012')) {
|
yuuji@0
|
505 ret = (char *) fs_get (n--);
|
yuuji@0
|
506 memcpy (ret,s,*size = n); /* copy into a free storage string */
|
yuuji@0
|
507 ret[n] = '\0'; /* tie off string with null */
|
yuuji@0
|
508 return ret;
|
yuuji@0
|
509 }
|
yuuji@0
|
510 }
|
yuuji@0
|
511 /* copy partial string from buffer */
|
yuuji@0
|
512 memcpy ((ret = (char *) fs_get (n)),s,*size = n);
|
yuuji@0
|
513 /* get more data from the net */
|
yuuji@0
|
514 if (!tcp_getdata (stream)) fs_give ((void **) &ret);
|
yuuji@0
|
515 /* special case of newline broken by buffer */
|
yuuji@0
|
516 else if ((c == '\015') && (*stream->iptr == '\012')) {
|
yuuji@0
|
517 stream->iptr++; /* eat the line feed */
|
yuuji@0
|
518 stream->ictr--;
|
yuuji@0
|
519 ret[*size = --n] = '\0'; /* tie off string with null */
|
yuuji@0
|
520 }
|
yuuji@0
|
521 else *contd = LONGT; /* continuation needed */
|
yuuji@0
|
522 return ret;
|
yuuji@0
|
523 }
|
yuuji@0
|
524
|
yuuji@0
|
525 /* TCP/IP receive buffer
|
yuuji@0
|
526 * Accepts: TCP/IP stream
|
yuuji@0
|
527 * size in bytes
|
yuuji@0
|
528 * buffer to read into
|
yuuji@0
|
529 * Returns: T if success, NIL otherwise
|
yuuji@0
|
530 */
|
yuuji@0
|
531
|
yuuji@0
|
532 long tcp_getbuffer (TCPSTREAM *stream,unsigned long size,char *s)
|
yuuji@0
|
533 {
|
yuuji@0
|
534 unsigned long n;
|
yuuji@0
|
535 /* make sure socket still alive */
|
yuuji@0
|
536 if (stream->tcpsi < 0) return NIL;
|
yuuji@0
|
537 /* can transfer bytes from buffer? */
|
yuuji@0
|
538 if (n = min (size,stream->ictr)) {
|
yuuji@0
|
539 memcpy (s,stream->iptr,n); /* yes, slurp as much as we can from it */
|
yuuji@0
|
540 s += n; /* update pointer */
|
yuuji@0
|
541 stream->iptr +=n;
|
yuuji@0
|
542 size -= n; /* update # of bytes to do */
|
yuuji@0
|
543 stream->ictr -=n;
|
yuuji@0
|
544 }
|
yuuji@0
|
545 if (size) {
|
yuuji@0
|
546 int i;
|
yuuji@0
|
547 fd_set fds,efds;
|
yuuji@0
|
548 struct timeval tmo;
|
yuuji@0
|
549 time_t t = time (0);
|
yuuji@0
|
550 blocknotify_t bn=(blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
|
yuuji@0
|
551 (*bn) (BLOCK_TCPREAD,NIL);
|
yuuji@0
|
552 while (size > 0) { /* until request satisfied */
|
yuuji@0
|
553 time_t tl = time (0);
|
yuuji@0
|
554 time_t now = tl;
|
yuuji@0
|
555 time_t ti = ttmo_read ? now + ttmo_read : 0;
|
yuuji@0
|
556 if (tcpdebug) mm_log ("Reading TCP buffer",TCPDEBUG);
|
yuuji@0
|
557 tmo.tv_usec = 0;
|
yuuji@0
|
558 FD_ZERO (&fds); /* initialize selection vector */
|
yuuji@0
|
559 FD_ZERO (&efds); /* handle errors too */
|
yuuji@0
|
560 /* set bit in selection vectors */
|
yuuji@0
|
561 FD_SET (stream->tcpsi,&fds);
|
yuuji@0
|
562 FD_SET (stream->tcpsi,&efds);
|
yuuji@0
|
563 errno = NIL; /* initially no error */
|
yuuji@0
|
564 do { /* block under timeout */
|
yuuji@0
|
565 tmo.tv_sec = ti ? ti - now : 0;
|
yuuji@0
|
566 i = select (stream->tcpsi+1,&fds,NIL,&efds,ti ? &tmo : NIL);
|
yuuji@0
|
567 now = time (0); /* fake timeout if interrupt & time expired */
|
yuuji@0
|
568 if ((i < 0) && (errno == EINTR) && ti && (ti <= now)) i = 0;
|
yuuji@0
|
569 } while ((i < 0) && (errno == EINTR));
|
yuuji@0
|
570 if (i) { /* non-timeout result from select? */
|
yuuji@0
|
571 if (i > 0) /* read what we can */
|
yuuji@0
|
572 while (((i = read (stream->tcpsi,s,(int) min (maxposint,size))) < 0)
|
yuuji@0
|
573 && (errno == EINTR));
|
yuuji@0
|
574 if (i <= 0) { /* error seen? */
|
yuuji@0
|
575 if (tcpdebug) {
|
yuuji@0
|
576 char tmp[MAILTMPLEN];
|
yuuji@0
|
577 if (i) sprintf (s = tmp,"TCP buffer read I/O error %d",errno);
|
yuuji@0
|
578 else s = "TCP buffer read end of file";
|
yuuji@0
|
579 mm_log (s,TCPDEBUG);
|
yuuji@0
|
580 }
|
yuuji@0
|
581 return tcp_abort (stream);
|
yuuji@0
|
582 }
|
yuuji@0
|
583 s += i; /* success, point at new place to write */
|
yuuji@0
|
584 size -= i; /* reduce byte count */
|
yuuji@0
|
585 if (tcpdebug) mm_log ("Successfully read TCP buffer",TCPDEBUG);
|
yuuji@0
|
586 }
|
yuuji@0
|
587 /* timeout, punt unless told not to */
|
yuuji@0
|
588 else if (!tmoh || !(*tmoh) (now - t,now - tl)) {
|
yuuji@0
|
589 if (tcpdebug) mm_log ("TCP buffer read timeout",TCPDEBUG);
|
yuuji@0
|
590 return tcp_abort (stream);
|
yuuji@0
|
591 }
|
yuuji@0
|
592 }
|
yuuji@0
|
593 (*bn) (BLOCK_NONE,NIL);
|
yuuji@0
|
594 }
|
yuuji@0
|
595 *s = '\0'; /* tie off string */
|
yuuji@0
|
596 return LONGT;
|
yuuji@0
|
597 }
|
yuuji@0
|
598
|
yuuji@0
|
599 /* TCP/IP receive data
|
yuuji@0
|
600 * Accepts: TCP/IP stream
|
yuuji@0
|
601 * Returns: T if success, NIL otherwise
|
yuuji@0
|
602 */
|
yuuji@0
|
603
|
yuuji@0
|
604 long tcp_getdata (TCPSTREAM *stream)
|
yuuji@0
|
605 {
|
yuuji@0
|
606 int i;
|
yuuji@0
|
607 fd_set fds,efds;
|
yuuji@0
|
608 struct timeval tmo;
|
yuuji@0
|
609 time_t t = time (0);
|
yuuji@0
|
610 blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
|
yuuji@0
|
611 if (stream->tcpsi < 0) return NIL;
|
yuuji@0
|
612 (*bn) (BLOCK_TCPREAD,NIL);
|
yuuji@0
|
613 while (stream->ictr < 1) { /* if nothing in the buffer */
|
yuuji@0
|
614 time_t tl = time (0); /* start of request */
|
yuuji@0
|
615 time_t now = tl;
|
yuuji@0
|
616 time_t ti = ttmo_read ? now + ttmo_read : 0;
|
yuuji@0
|
617 if (tcpdebug) mm_log ("Reading TCP data",TCPDEBUG);
|
yuuji@0
|
618 tmo.tv_usec = 0;
|
yuuji@0
|
619 FD_ZERO (&fds); /* initialize selection vector */
|
yuuji@0
|
620 FD_ZERO (&efds); /* handle errors too */
|
yuuji@0
|
621 FD_SET (stream->tcpsi,&fds);/* set bit in selection vectors */
|
yuuji@0
|
622 FD_SET (stream->tcpsi,&efds);
|
yuuji@0
|
623 errno = NIL; /* initially no error */
|
yuuji@0
|
624 do { /* block under timeout */
|
yuuji@0
|
625 tmo.tv_sec = ti ? ti - now : 0;
|
yuuji@0
|
626 i = select (stream->tcpsi+1,&fds,NIL,&efds,ti ? &tmo : NIL);
|
yuuji@0
|
627 now = time (0); /* fake timeout if interrupt & time expired */
|
yuuji@0
|
628 if ((i < 0) && (errno == EINTR) && ti && (ti <= now)) i = 0;
|
yuuji@0
|
629 } while ((i < 0) && (errno == EINTR));
|
yuuji@0
|
630 if (i) { /* non-timeout result from select? */
|
yuuji@0
|
631 /* read what we can */
|
yuuji@0
|
632 if (i > 0) while (((i = read (stream->tcpsi,stream->ibuf,BUFLEN)) < 0) &&
|
yuuji@0
|
633 (errno == EINTR));
|
yuuji@0
|
634 if (i <= 0) { /* error seen? */
|
yuuji@0
|
635 if (tcpdebug) {
|
yuuji@0
|
636 char *s,tmp[MAILTMPLEN];
|
yuuji@0
|
637 if (i) sprintf (s = tmp,"TCP data read I/O error %d",errno);
|
yuuji@0
|
638 else s = "TCP data read end of file";
|
yuuji@0
|
639 mm_log (s,TCPDEBUG);
|
yuuji@0
|
640 }
|
yuuji@0
|
641 return tcp_abort (stream);
|
yuuji@0
|
642 }
|
yuuji@0
|
643 stream->ictr = i; /* success, set new count and pointer */
|
yuuji@0
|
644 stream->iptr = stream->ibuf;
|
yuuji@0
|
645 if (tcpdebug) mm_log ("Successfully read TCP data",TCPDEBUG);
|
yuuji@0
|
646 }
|
yuuji@0
|
647 /* timeout, punt unless told not to */
|
yuuji@0
|
648 else if (!tmoh || !(*tmoh) (now - t,now - tl)) {
|
yuuji@0
|
649 if (tcpdebug) mm_log ("TCP data read timeout",TCPDEBUG);
|
yuuji@0
|
650 return tcp_abort (stream);/* error or timeout no-continue */
|
yuuji@0
|
651 }
|
yuuji@0
|
652 }
|
yuuji@0
|
653 (*bn) (BLOCK_NONE,NIL);
|
yuuji@0
|
654 return T;
|
yuuji@0
|
655 }
|
yuuji@0
|
656
|
yuuji@0
|
657 /* TCP/IP send string as record
|
yuuji@0
|
658 * Accepts: TCP/IP stream
|
yuuji@0
|
659 * string pointer
|
yuuji@0
|
660 * Returns: T if success else NIL
|
yuuji@0
|
661 */
|
yuuji@0
|
662
|
yuuji@0
|
663 long tcp_soutr (TCPSTREAM *stream,char *string)
|
yuuji@0
|
664 {
|
yuuji@0
|
665 return tcp_sout (stream,string,(unsigned long) strlen (string));
|
yuuji@0
|
666 }
|
yuuji@0
|
667
|
yuuji@0
|
668
|
yuuji@0
|
669 /* TCP/IP send string
|
yuuji@0
|
670 * Accepts: TCP/IP stream
|
yuuji@0
|
671 * string pointer
|
yuuji@0
|
672 * byte count
|
yuuji@0
|
673 * Returns: T if success else NIL
|
yuuji@0
|
674 */
|
yuuji@0
|
675
|
yuuji@0
|
676 long tcp_sout (TCPSTREAM *stream,char *string,unsigned long size)
|
yuuji@0
|
677 {
|
yuuji@0
|
678 int i;
|
yuuji@0
|
679 fd_set fds,efds;
|
yuuji@0
|
680 struct timeval tmo;
|
yuuji@0
|
681 time_t t = time (0);
|
yuuji@0
|
682 blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
|
yuuji@0
|
683 if (stream->tcpso < 0) return NIL;
|
yuuji@0
|
684 (*bn) (BLOCK_TCPWRITE,NIL);
|
yuuji@0
|
685 while (size > 0) { /* until request satisfied */
|
yuuji@0
|
686 time_t tl = time (0); /* start of request */
|
yuuji@0
|
687 time_t now = tl;
|
yuuji@0
|
688 time_t ti = ttmo_write ? now + ttmo_write : 0;
|
yuuji@0
|
689 if (tcpdebug) mm_log ("Writing to TCP",TCPDEBUG);
|
yuuji@0
|
690 tmo.tv_usec = 0;
|
yuuji@0
|
691 FD_ZERO (&fds); /* initialize selection vector */
|
yuuji@0
|
692 FD_ZERO (&efds); /* handle errors too */
|
yuuji@0
|
693 FD_SET (stream->tcpso,&fds);/* set bit in selection vector */
|
yuuji@0
|
694 FD_SET(stream->tcpso,&efds);/* set bit in error selection vector */
|
yuuji@0
|
695 errno = NIL; /* block and write */
|
yuuji@0
|
696 do { /* block under timeout */
|
yuuji@0
|
697 tmo.tv_sec = ti ? ti - now : 0;
|
yuuji@0
|
698 i = select (stream->tcpso+1,NIL,&fds,&efds,ti ? &tmo : NIL);
|
yuuji@0
|
699 now = time (0); /* fake timeout if interrupt & time expired */
|
yuuji@0
|
700 if ((i < 0) && (errno == EINTR) && ti && (ti <= now)) i = 0;
|
yuuji@0
|
701 } while ((i < 0) && (errno == EINTR));
|
yuuji@0
|
702 if (i) { /* non-timeout result from select? */
|
yuuji@0
|
703 /* write what we can */
|
yuuji@0
|
704 if (i > 0) while (((i = write (stream->tcpso,string,size)) < 0) &&
|
yuuji@0
|
705 (errno == EINTR));
|
yuuji@0
|
706 if (i <= 0) { /* error seen? */
|
yuuji@0
|
707 if (tcpdebug) {
|
yuuji@0
|
708 char tmp[MAILTMPLEN];
|
yuuji@0
|
709 sprintf (tmp,"TCP write I/O error %d",errno);
|
yuuji@0
|
710 mm_log (tmp,TCPDEBUG);
|
yuuji@0
|
711 }
|
yuuji@0
|
712 return tcp_abort (stream);
|
yuuji@0
|
713 }
|
yuuji@0
|
714 string += i; /* how much we sent */
|
yuuji@0
|
715 size -= i; /* count this size */
|
yuuji@0
|
716 if (tcpdebug) mm_log ("successfully wrote to TCP",TCPDEBUG);
|
yuuji@0
|
717 }
|
yuuji@0
|
718 /* timeout, punt unless told not to */
|
yuuji@0
|
719 else if (!tmoh || !(*tmoh) (now - t,now - tl)) {
|
yuuji@0
|
720 if (tcpdebug) mm_log ("TCP write timeout",TCPDEBUG);
|
yuuji@0
|
721 return tcp_abort (stream);
|
yuuji@0
|
722 }
|
yuuji@0
|
723 }
|
yuuji@0
|
724 (*bn) (BLOCK_NONE,NIL);
|
yuuji@0
|
725 return T; /* all done */
|
yuuji@0
|
726 }
|
yuuji@0
|
727
|
yuuji@0
|
728 /* TCP/IP close
|
yuuji@0
|
729 * Accepts: TCP/IP stream
|
yuuji@0
|
730 */
|
yuuji@0
|
731
|
yuuji@0
|
732 void tcp_close (TCPSTREAM *stream)
|
yuuji@0
|
733 {
|
yuuji@0
|
734 tcp_abort (stream); /* nuke the stream */
|
yuuji@0
|
735 /* flush host names */
|
yuuji@0
|
736 if (stream->host) fs_give ((void **) &stream->host);
|
yuuji@0
|
737 if (stream->remotehost) fs_give ((void **) &stream->remotehost);
|
yuuji@0
|
738 if (stream->localhost) fs_give ((void **) &stream->localhost);
|
yuuji@0
|
739 fs_give ((void **) &stream); /* flush the stream */
|
yuuji@0
|
740 }
|
yuuji@0
|
741
|
yuuji@0
|
742
|
yuuji@0
|
743 /* TCP/IP abort stream
|
yuuji@0
|
744 * Accepts: TCP/IP stream
|
yuuji@0
|
745 * Returns: NIL always
|
yuuji@0
|
746 */
|
yuuji@0
|
747
|
yuuji@0
|
748 long tcp_abort (TCPSTREAM *stream)
|
yuuji@0
|
749 {
|
yuuji@0
|
750 blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
|
yuuji@0
|
751 if (stream->tcpsi >= 0) { /* no-op if no socket */
|
yuuji@0
|
752 (*bn) (BLOCK_TCPCLOSE,NIL);
|
yuuji@0
|
753 close (stream->tcpsi); /* nuke the socket */
|
yuuji@0
|
754 if (stream->tcpsi != stream->tcpso) close (stream->tcpso);
|
yuuji@0
|
755 stream->tcpsi = stream->tcpso = -1;
|
yuuji@0
|
756 }
|
yuuji@0
|
757 (*bn) (BLOCK_NONE,NIL);
|
yuuji@0
|
758 return NIL;
|
yuuji@0
|
759 }
|
yuuji@0
|
760
|
yuuji@0
|
761 /* TCP/IP get host name
|
yuuji@0
|
762 * Accepts: TCP/IP stream
|
yuuji@0
|
763 * Returns: host name for this stream
|
yuuji@0
|
764 */
|
yuuji@0
|
765
|
yuuji@0
|
766 char *tcp_host (TCPSTREAM *stream)
|
yuuji@0
|
767 {
|
yuuji@0
|
768 return stream->host; /* use tcp_remotehost() if want guarantees */
|
yuuji@0
|
769 }
|
yuuji@0
|
770
|
yuuji@0
|
771
|
yuuji@0
|
772 /* TCP/IP get remote host name
|
yuuji@0
|
773 * Accepts: TCP/IP stream
|
yuuji@0
|
774 * Returns: host name for this stream
|
yuuji@0
|
775 */
|
yuuji@0
|
776
|
yuuji@0
|
777 char *tcp_remotehost (TCPSTREAM *stream)
|
yuuji@0
|
778 {
|
yuuji@0
|
779 if (!stream->remotehost) {
|
yuuji@0
|
780 size_t sadrlen;
|
yuuji@0
|
781 struct sockaddr *sadr = ip_newsockaddr (&sadrlen);
|
yuuji@0
|
782 stream->remotehost = /* get socket's peer name */
|
yuuji@0
|
783 getpeername (stream->tcpsi,sadr,(void *) &sadrlen) ?
|
yuuji@0
|
784 cpystr (stream->host) : tcp_name (sadr,NIL);
|
yuuji@0
|
785 fs_give ((void **) &sadr);
|
yuuji@0
|
786 }
|
yuuji@0
|
787 return stream->remotehost;
|
yuuji@0
|
788 }
|
yuuji@0
|
789
|
yuuji@0
|
790
|
yuuji@0
|
791 /* TCP/IP return port for this stream
|
yuuji@0
|
792 * Accepts: TCP/IP stream
|
yuuji@0
|
793 * Returns: port number for this stream
|
yuuji@0
|
794 */
|
yuuji@0
|
795
|
yuuji@0
|
796 unsigned long tcp_port (TCPSTREAM *stream)
|
yuuji@0
|
797 {
|
yuuji@0
|
798 return stream->port; /* return port number */
|
yuuji@0
|
799 }
|
yuuji@0
|
800
|
yuuji@0
|
801
|
yuuji@0
|
802 /* TCP/IP get local host name
|
yuuji@0
|
803 * Accepts: TCP/IP stream
|
yuuji@0
|
804 * Returns: local host name
|
yuuji@0
|
805 */
|
yuuji@0
|
806
|
yuuji@0
|
807 char *tcp_localhost (TCPSTREAM *stream)
|
yuuji@0
|
808 {
|
yuuji@0
|
809 if (!stream->localhost) {
|
yuuji@0
|
810 size_t sadrlen;
|
yuuji@0
|
811 struct sockaddr *sadr = ip_newsockaddr (&sadrlen);
|
yuuji@0
|
812 stream->localhost = /* get socket's name */
|
yuuji@0
|
813 ((stream->port & 0xffff000) ||
|
yuuji@0
|
814 getsockname (stream->tcpsi,sadr,(void *) &sadrlen)) ?
|
yuuji@0
|
815 cpystr (mylocalhost ()) : tcp_name (sadr,NIL);
|
yuuji@0
|
816 fs_give ((void **) &sadr);
|
yuuji@0
|
817 }
|
yuuji@0
|
818 return stream->localhost; /* return local host name */
|
yuuji@0
|
819 }
|
yuuji@0
|
820
|
yuuji@1
|
821 /* Get $TCPREMOTEHOST || $TCPREMOTEHOST
|
yuuji@1
|
822 * If invoked via tcpserver or couriertcpd, consult $TCPREMOTEHOST
|
yuuji@1
|
823 * or $TCPREMOTEIP
|
yuuji@1
|
824 */
|
yuuji@1
|
825 char* gettcpremoteip()
|
yuuji@1
|
826 {
|
yuuji@1
|
827 if (getenv("TCPREMOTEHOST") && strcmp("0", getenv("TCPREMOTEHOST"))) {
|
yuuji@1
|
828 return getenv("TCPREMOTEHOST");
|
yuuji@1
|
829 } else if (getenv("TCPREMOTEIP")) {
|
yuuji@1
|
830 return getenv("TCPREMOTEIP");
|
yuuji@1
|
831 }
|
yuuji@1
|
832 return "NON-IPv4";
|
yuuji@1
|
833 }
|
yuuji@1
|
834
|
yuuji@0
|
835 /* TCP/IP get client host address (server calls only)
|
yuuji@0
|
836 * Returns: client host address
|
yuuji@0
|
837 */
|
yuuji@0
|
838
|
yuuji@0
|
839 char *tcp_clientaddr ()
|
yuuji@0
|
840 {
|
yuuji@0
|
841 if (!myClientAddr) {
|
yuuji@0
|
842 size_t sadrlen;
|
yuuji@0
|
843 struct sockaddr *sadr = ip_newsockaddr (&sadrlen);
|
yuuji@0
|
844 if (getpeername (0,sadr,(void *) &sadrlen))
|
yuuji@0
|
845 myClientAddr = cpystr ("UNKNOWN");
|
yuuji@0
|
846 else { /* get stdin's peer name */
|
yuuji@0
|
847 myClientAddr = cpystr (ip_sockaddrtostring (sadr));
|
yuuji@0
|
848 if (myClientPort < 0) myClientPort = ip_sockaddrtoport (sadr);
|
yuuji@0
|
849 }
|
yuuji@0
|
850 fs_give ((void **) &sadr);
|
yuuji@0
|
851 }
|
yuuji@0
|
852 return myClientAddr;
|
yuuji@0
|
853 }
|
yuuji@0
|
854
|
yuuji@0
|
855
|
yuuji@0
|
856 /* TCP/IP get client host name (server calls only)
|
yuuji@0
|
857 * Returns: client host name
|
yuuji@0
|
858 */
|
yuuji@0
|
859
|
yuuji@0
|
860 char *tcp_clienthost ()
|
yuuji@0
|
861 {
|
yuuji@0
|
862 if (!myClientHost) {
|
yuuji@0
|
863 size_t sadrlen;
|
yuuji@0
|
864 struct sockaddr *sadr = ip_newsockaddr (&sadrlen);
|
yuuji@1
|
865 #ifdef INET6
|
yuuji@1
|
866 if (getenv("TCPREMOTEIP")) {
|
yuuji@1
|
867 myClientHost =
|
yuuji@1
|
868 cpystr((getenv("TCPREMOTEHOST")
|
yuuji@1
|
869 && strcasecmp("UNKNOWN", getenv("TCPREMOTEHOST")))
|
yuuji@1
|
870 ? getenv("TCPREMOTEHOST")
|
yuuji@1
|
871 : getenv("TCPREMOTEIP"));
|
yuuji@1
|
872 } else
|
yuuji@1
|
873 #endif
|
yuuji@0
|
874 if (getpeername (0,sadr,(void *) &sadrlen)) {
|
yuuji@0
|
875 char *s,*t,*v,tmp[MAILTMPLEN];
|
yuuji@0
|
876 if ((s = getenv (t = "SSH_CLIENT")) ||
|
yuuji@0
|
877 (s = getenv (t = "KRB5REMOTEADDR")) ||
|
yuuji@0
|
878 (s = getenv (t = "SSH2_CLIENT"))) {
|
yuuji@0
|
879 if (v = strchr (s,' ')) *v = '\0';
|
yuuji@0
|
880 sprintf (v = tmp,"%.80s=%.80s",t,s);
|
yuuji@0
|
881 }
|
yuuji@0
|
882 else v = "UNKNOWN";
|
yuuji@0
|
883 myClientHost = cpystr (v);
|
yuuji@0
|
884 }
|
yuuji@0
|
885 else { /* get stdin's peer name */
|
yuuji@0
|
886 myClientHost = tcp_name (sadr,T);
|
yuuji@0
|
887 if (!myClientAddr) myClientAddr = cpystr (ip_sockaddrtostring (sadr));
|
yuuji@0
|
888 if (myClientPort < 0) myClientPort = ip_sockaddrtoport (sadr);
|
yuuji@0
|
889 }
|
yuuji@0
|
890 fs_give ((void **) &sadr);
|
yuuji@0
|
891 }
|
yuuji@0
|
892 return myClientHost;
|
yuuji@0
|
893 }
|
yuuji@0
|
894
|
yuuji@0
|
895
|
yuuji@0
|
896 /* TCP/IP get client port number (server calls only)
|
yuuji@0
|
897 * Returns: client port number
|
yuuji@0
|
898 */
|
yuuji@0
|
899
|
yuuji@0
|
900 long tcp_clientport ()
|
yuuji@0
|
901 {
|
yuuji@0
|
902 if (!myClientHost && !myClientAddr) tcp_clientaddr ();
|
yuuji@0
|
903 return myClientPort;
|
yuuji@0
|
904 }
|
yuuji@0
|
905
|
yuuji@0
|
906 /* TCP/IP get server host address (server calls only)
|
yuuji@0
|
907 * Returns: server host address
|
yuuji@0
|
908 */
|
yuuji@0
|
909
|
yuuji@0
|
910 char *tcp_serveraddr ()
|
yuuji@0
|
911 {
|
yuuji@0
|
912 if (!myServerAddr) {
|
yuuji@0
|
913 size_t sadrlen;
|
yuuji@0
|
914 struct sockaddr *sadr = ip_newsockaddr (&sadrlen);
|
yuuji@0
|
915 if (getsockname (0,sadr,(void *) &sadrlen))
|
yuuji@0
|
916 myServerAddr = cpystr ("UNKNOWN");
|
yuuji@0
|
917 else { /* get stdin's name */
|
yuuji@0
|
918 myServerAddr = cpystr (ip_sockaddrtostring (sadr));
|
yuuji@0
|
919 if (myServerPort < 0) myServerPort = ip_sockaddrtoport (sadr);
|
yuuji@0
|
920 }
|
yuuji@0
|
921 fs_give ((void **) &sadr);
|
yuuji@0
|
922 }
|
yuuji@0
|
923 return myServerAddr;
|
yuuji@0
|
924 }
|
yuuji@0
|
925
|
yuuji@0
|
926
|
yuuji@0
|
927 /* TCP/IP get server host name (server calls only)
|
yuuji@0
|
928 * Returns: server host name
|
yuuji@0
|
929 */
|
yuuji@0
|
930
|
yuuji@0
|
931 char *tcp_serverhost ()
|
yuuji@0
|
932 {
|
yuuji@0
|
933 if (!myServerHost) { /* once-only */
|
yuuji@0
|
934 size_t sadrlen;
|
yuuji@0
|
935 struct sockaddr *sadr = ip_newsockaddr (&sadrlen);
|
yuuji@0
|
936 /* get stdin's name */
|
yuuji@1
|
937 if (getsockname (0,sadr,(void *) &sadrlen) ||
|
yuuji@1
|
938 (myServerPort = ip_sockaddrtoport (sadr)) < 0)
|
yuuji@0
|
939 myServerHost = cpystr (mylocalhost ());
|
yuuji@0
|
940 else { /* get stdin's name */
|
yuuji@0
|
941 myServerHost = tcp_name (sadr,NIL);
|
yuuji@0
|
942 if (!myServerAddr) myServerAddr = cpystr (ip_sockaddrtostring (sadr));
|
yuuji@0
|
943 if (myServerPort < 0) myServerPort = ip_sockaddrtoport (sadr);
|
yuuji@0
|
944 }
|
yuuji@0
|
945 fs_give ((void **) &sadr);
|
yuuji@0
|
946 }
|
yuuji@0
|
947 return myServerHost;
|
yuuji@0
|
948 }
|
yuuji@0
|
949
|
yuuji@0
|
950
|
yuuji@0
|
951 /* TCP/IP get server port number (server calls only)
|
yuuji@0
|
952 * Returns: server port number
|
yuuji@0
|
953 */
|
yuuji@0
|
954
|
yuuji@0
|
955 long tcp_serverport ()
|
yuuji@0
|
956 {
|
yuuji@0
|
957 if (!myServerHost && !myServerAddr) tcp_serveraddr ();
|
yuuji@0
|
958 return myServerPort;
|
yuuji@0
|
959 }
|
yuuji@0
|
960
|
yuuji@0
|
961 /* TCP/IP return canonical form of host name
|
yuuji@0
|
962 * Accepts: host name
|
yuuji@0
|
963 * Returns: canonical form of host name
|
yuuji@0
|
964 */
|
yuuji@0
|
965
|
yuuji@0
|
966 char *tcp_canonical (char *name)
|
yuuji@0
|
967 {
|
yuuji@0
|
968 char *ret,host[MAILTMPLEN];
|
yuuji@0
|
969 blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
|
yuuji@0
|
970 void *data;
|
yuuji@0
|
971 /* look like domain literal? */
|
yuuji@0
|
972 if (name[0] == '[' && name[strlen (name) - 1] == ']') return name;
|
yuuji@0
|
973 (*bn) (BLOCK_DNSLOOKUP,NIL); /* quell alarms */
|
yuuji@0
|
974 data = (*bn) (BLOCK_SENSITIVE,NIL);
|
yuuji@0
|
975 if (tcpdebug) {
|
yuuji@0
|
976 sprintf (host,"DNS canonicalization %.80s",name);
|
yuuji@0
|
977 mm_log (host,TCPDEBUG);
|
yuuji@0
|
978 }
|
yuuji@0
|
979 /* get canonical name */
|
yuuji@0
|
980 if (!ip_nametoaddr (name,NIL,NIL,&ret,NIL)) ret = name;
|
yuuji@0
|
981 (*bn) (BLOCK_NONSENSITIVE,data);
|
yuuji@0
|
982 (*bn) (BLOCK_NONE,NIL); /* alarms OK now */
|
yuuji@0
|
983 if (tcpdebug) mm_log ("DNS canonicalization done",TCPDEBUG);
|
yuuji@0
|
984 return ret;
|
yuuji@0
|
985 }
|
yuuji@0
|
986
|
yuuji@0
|
987 /* TCP/IP return name from socket
|
yuuji@0
|
988 * Accepts: socket
|
yuuji@0
|
989 * verbose flag
|
yuuji@0
|
990 * Returns: cpystr name
|
yuuji@0
|
991 */
|
yuuji@0
|
992
|
yuuji@0
|
993 char *tcp_name (struct sockaddr *sadr,long flag)
|
yuuji@0
|
994 {
|
yuuji@0
|
995 char *ret,*t,adr[MAILTMPLEN],tmp[MAILTMPLEN];
|
yuuji@0
|
996 sprintf (ret = adr,"[%.80s]",ip_sockaddrtostring (sadr));
|
yuuji@0
|
997 if (allowreversedns) {
|
yuuji@0
|
998 blocknotify_t bn = (blocknotify_t)mail_parameters(NIL,GET_BLOCKNOTIFY,NIL);
|
yuuji@0
|
999 void *data;
|
yuuji@0
|
1000 if (tcpdebug) {
|
yuuji@0
|
1001 sprintf (tmp,"Reverse DNS resolution %s",adr);
|
yuuji@0
|
1002 mm_log (tmp,TCPDEBUG);
|
yuuji@0
|
1003 }
|
yuuji@0
|
1004 (*bn) (BLOCK_DNSLOOKUP,NIL);/* quell alarms */
|
yuuji@0
|
1005 data = (*bn) (BLOCK_SENSITIVE,NIL);
|
yuuji@0
|
1006 /* translate address to name */
|
yuuji@0
|
1007 if (t = tcp_name_valid (ip_sockaddrtoname (sadr))) {
|
yuuji@0
|
1008 /* produce verbose form if needed */
|
yuuji@0
|
1009 if (flag) sprintf (ret = tmp,"%s %s",t,adr);
|
yuuji@0
|
1010 else ret = t;
|
yuuji@0
|
1011 }
|
yuuji@0
|
1012 (*bn) (BLOCK_NONSENSITIVE,data);
|
yuuji@0
|
1013 (*bn) (BLOCK_NONE,NIL); /* alarms OK now */
|
yuuji@0
|
1014 if (tcpdebug) mm_log ("Reverse DNS resolution done",TCPDEBUG);
|
yuuji@0
|
1015 }
|
yuuji@0
|
1016 return cpystr (ret);
|
yuuji@0
|
1017 }
|
yuuji@0
|
1018
|
yuuji@0
|
1019
|
yuuji@0
|
1020 /* TCP/IP validate name
|
yuuji@0
|
1021 * Accepts: domain name
|
yuuji@0
|
1022 * Returns: name if valid, NIL otherwise
|
yuuji@0
|
1023 */
|
yuuji@0
|
1024
|
yuuji@0
|
1025 char *tcp_name_valid (char *s)
|
yuuji@0
|
1026 {
|
yuuji@0
|
1027 int c;
|
yuuji@0
|
1028 char *ret,*tail;
|
yuuji@0
|
1029 /* must be non-empty and not too long */
|
yuuji@0
|
1030 if ((ret = (s && *s) ? s : NIL) && (tail = ret + NETMAXHOST)) {
|
yuuji@0
|
1031 /* must be alnum, dot, or hyphen */
|
yuuji@0
|
1032 while ((c = *s++) && (s <= tail) &&
|
yuuji@0
|
1033 (((c >= 'A') && (c <= 'Z')) || ((c >= 'a') && (c <= 'z')) ||
|
yuuji@0
|
1034 ((c >= '0') && (c <= '9')) || (c == '-') || (c == '.')));
|
yuuji@0
|
1035 if (c) ret = NIL;
|
yuuji@0
|
1036 }
|
yuuji@0
|
1037 return ret;
|
yuuji@0
|
1038 }
|
yuuji@0
|
1039
|
yuuji@0
|
1040 /* TCP/IP check if client is given host name
|
yuuji@0
|
1041 * Accepts: candidate host name
|
yuuji@0
|
1042 * Returns: T if match, NIL otherwise
|
yuuji@0
|
1043 */
|
yuuji@0
|
1044
|
yuuji@0
|
1045 long tcp_isclienthost (char *host)
|
yuuji@0
|
1046 {
|
yuuji@0
|
1047 int family;
|
yuuji@0
|
1048 size_t adrlen,sadrlen,len;
|
yuuji@0
|
1049 void *adr,*next;
|
yuuji@0
|
1050 struct sockaddr *sadr;
|
yuuji@0
|
1051 long ret = NIL;
|
yuuji@0
|
1052 /* make sure that myClientAddr is set */
|
yuuji@0
|
1053 if (tcp_clienthost () && myClientAddr)
|
yuuji@0
|
1054 /* get sockaddr of client */
|
yuuji@0
|
1055 for (adr = ip_nametoaddr (host,&adrlen,&family,NIL,&next); adr && !ret;
|
yuuji@0
|
1056 adr = ip_nametoaddr (NIL,&adrlen,&family,NIL,&next)) {
|
yuuji@0
|
1057 /* build sockaddr of given address */
|
yuuji@0
|
1058 sadr = ip_sockaddr (family,adr,adrlen,1,&len);
|
yuuji@0
|
1059 if (!strcmp (myClientAddr,ip_sockaddrtostring (sadr))) ret = LONGT;
|
yuuji@0
|
1060 fs_give ((void **) &sadr); /* done with client sockaddr */
|
yuuji@0
|
1061 }
|
yuuji@0
|
1062 return ret;
|
yuuji@0
|
1063 }
|
yuuji@0
|
1064
|
yuuji@0
|
1065 /* Following statement must be at end of this module */
|
yuuji@0
|
1066
|
yuuji@0
|
1067 #undef fork /* undo any use of vfork() */
|