imapext-2007

annotate src/osdep/unix/tcp_unix.c @ 0:ada5e610ab86

find changesets by author, revision, files, or words in the commit message
imap-2007e
author yuuji@gentei.org
date Mon, 14 Sep 2009 15:17:45 +0900
parents
children 28a55bc1110c 5cecc027b845
rev   line source
yuuji@0 1 /* ========================================================================
yuuji@0 2 * Copyright 1988-2008 University of Washington
yuuji@0 3 *
yuuji@0 4 * Licensed under the Apache License, Version 2.0 (the "License");
yuuji@0 5 * you may not use this file except in compliance with the License.
yuuji@0 6 * You may obtain a copy of the License at
yuuji@0 7 *
yuuji@0 8 * http://www.apache.org/licenses/LICENSE-2.0
yuuji@0 9 *
yuuji@0 10 *
yuuji@0 11 * ========================================================================
yuuji@0 12 */
yuuji@0 13
yuuji@0 14 /*
yuuji@0 15 * Program: UNIX TCP/IP routines
yuuji@0 16 *
yuuji@0 17 * Author: Mark Crispin
yuuji@0 18 * Networks and Distributed Computing
yuuji@0 19 * Computing & Communications
yuuji@0 20 * University of Washington
yuuji@0 21 * Administration Building, AG-44
yuuji@0 22 * Seattle, WA 98195
yuuji@0 23 * Internet: MRC@CAC.Washington.EDU
yuuji@0 24 *
yuuji@0 25 * Date: 1 August 1988
yuuji@0 26 * Last Edited: 13 January 2008
yuuji@0 27 */
yuuji@0 28
yuuji@0 29 #include "ip_unix.c"
yuuji@0 30
yuuji@0 31 #undef write /* don't use redefined write() */
yuuji@0 32
yuuji@0 33 static tcptimeout_t tmoh = NIL; /* TCP timeout handler routine */
yuuji@0 34 static long ttmo_open = 0; /* TCP timeouts, in seconds */
yuuji@0 35 static long ttmo_read = 0;
yuuji@0 36 static long ttmo_write = 0;
yuuji@0 37 static long rshtimeout = 15; /* rsh timeout */
yuuji@0 38 static char *rshcommand = NIL; /* rsh command */
yuuji@0 39 static char *rshpath = NIL; /* rsh path */
yuuji@0 40 static long sshtimeout = 15; /* ssh timeout */
yuuji@0 41 static char *sshcommand = NIL; /* ssh command */
yuuji@0 42 static char *sshpath = NIL; /* ssh path */
yuuji@0 43 static long allowreversedns = T;/* allow reverse DNS lookup */
yuuji@0 44 static long tcpdebug = NIL; /* extra TCP debugging telemetry */
yuuji@0 45 static char *myClientAddr = NIL;/* client IP address */
yuuji@0 46 static char *myClientHost = NIL;/* client DNS name */
yuuji@0 47 static long myClientPort = -1; /* client port number */
yuuji@0 48 static char *myServerAddr = NIL;/* server IP address */
yuuji@0 49 static char *myServerHost = NIL;/* server DNS name */
yuuji@0 50 static long myServerPort = -1; /* server port number */
yuuji@0 51
yuuji@0 52 extern long maxposint; /* get this from write.c */
yuuji@0 53
yuuji@0 54 /* Local function prototypes */
yuuji@0 55
yuuji@0 56 int tcp_socket_open (int family,void *adr,size_t adrlen,unsigned short port,
yuuji@0 57 char *tmp,int *ctr,char *hst);
yuuji@0 58 static char *tcp_getline_work (TCPSTREAM *stream,unsigned long *size,
yuuji@0 59 long *contd);
yuuji@0 60 long tcp_abort (TCPSTREAM *stream);
yuuji@0 61 char *tcp_name (struct sockaddr *sadr,long flag);
yuuji@0 62 char *tcp_name_valid (char *s);
yuuji@0 63
yuuji@0 64 /* TCP/IP manipulate parameters
yuuji@0 65 * Accepts: function code
yuuji@0 66 * function-dependent value
yuuji@0 67 * Returns: function-dependent return value
yuuji@0 68 */
yuuji@0 69
yuuji@0 70 void *tcp_parameters (long function,void *value)
yuuji@0 71 {
yuuji@0 72 void *ret = NIL;
yuuji@0 73 switch ((int) function) {
yuuji@0 74 case SET_TIMEOUT:
yuuji@0 75 tmoh = (tcptimeout_t) value;
yuuji@0 76 case GET_TIMEOUT:
yuuji@0 77 ret = (void *) tmoh;
yuuji@0 78 break;
yuuji@0 79 case SET_OPENTIMEOUT:
yuuji@0 80 ttmo_open = (long) value;
yuuji@0 81 case GET_OPENTIMEOUT:
yuuji@0 82 ret = (void *) ttmo_open;
yuuji@0 83 break;
yuuji@0 84 case SET_READTIMEOUT:
yuuji@0 85 ttmo_read = (long) value;
yuuji@0 86 case GET_READTIMEOUT:
yuuji@0 87 ret = (void *) ttmo_read;
yuuji@0 88 break;
yuuji@0 89 case SET_WRITETIMEOUT:
yuuji@0 90 ttmo_write = (long) value;
yuuji@0 91 case GET_WRITETIMEOUT:
yuuji@0 92 ret = (void *) ttmo_write;
yuuji@0 93 break;
yuuji@0 94 case SET_ALLOWREVERSEDNS:
yuuji@0 95 allowreversedns = (long) value;
yuuji@0 96 case GET_ALLOWREVERSEDNS:
yuuji@0 97 ret = (void *) allowreversedns;
yuuji@0 98 break;
yuuji@0 99 case SET_TCPDEBUG:
yuuji@0 100 tcpdebug = (long) value;
yuuji@0 101 case GET_TCPDEBUG:
yuuji@0 102 ret = (void *) tcpdebug;
yuuji@0 103 break;
yuuji@0 104
yuuji@0 105 case SET_RSHTIMEOUT:
yuuji@0 106 rshtimeout = (long) value;
yuuji@0 107 case GET_RSHTIMEOUT:
yuuji@0 108 ret = (void *) rshtimeout;
yuuji@0 109 break;
yuuji@0 110 case SET_RSHCOMMAND:
yuuji@0 111 if (rshcommand) fs_give ((void **) &rshcommand);
yuuji@0 112 rshcommand = cpystr ((char *) value);
yuuji@0 113 case GET_RSHCOMMAND:
yuuji@0 114 ret = (void *) rshcommand;
yuuji@0 115 break;
yuuji@0 116 case SET_RSHPATH:
yuuji@0 117 if (rshpath) fs_give ((void **) &rshpath);
yuuji@0 118 rshpath = cpystr ((char *) value);
yuuji@0 119 case GET_RSHPATH:
yuuji@0 120 ret = (void *) rshpath;
yuuji@0 121 break;
yuuji@0 122 case SET_SSHTIMEOUT:
yuuji@0 123 sshtimeout = (long) value;
yuuji@0 124 case GET_SSHTIMEOUT:
yuuji@0 125 ret = (void *) sshtimeout;
yuuji@0 126 break;
yuuji@0 127 case SET_SSHCOMMAND:
yuuji@0 128 if (sshcommand) fs_give ((void **) &sshcommand);
yuuji@0 129 sshcommand = cpystr ((char *) value);
yuuji@0 130 case GET_SSHCOMMAND:
yuuji@0 131 ret = (void *) sshcommand;
yuuji@0 132 break;
yuuji@0 133 case SET_SSHPATH:
yuuji@0 134 if (sshpath) fs_give ((void **) &sshpath);
yuuji@0 135 sshpath = cpystr ((char *) value);
yuuji@0 136 case GET_SSHPATH:
yuuji@0 137 ret = (void *) sshpath;
yuuji@0 138 break;
yuuji@0 139 }
yuuji@0 140 return ret;
yuuji@0 141 }
yuuji@0 142
yuuji@0 143 /* TCP/IP open
yuuji@0 144 * Accepts: host name
yuuji@0 145 * contact service name
yuuji@0 146 * contact port number and optional silent flag
yuuji@0 147 * Returns: TCP/IP stream if success else NIL
yuuji@0 148 */
yuuji@0 149
yuuji@0 150 TCPSTREAM *tcp_open (char *host,char *service,unsigned long port)
yuuji@0 151 {
yuuji@0 152 TCPSTREAM *stream = NIL;
yuuji@0 153 int family;
yuuji@0 154 int sock = -1;
yuuji@0 155 int ctr = 0;
yuuji@0 156 int silent = (port & NET_SILENT) ? T : NIL;
yuuji@0 157 int *ctrp = (port & NET_NOOPENTIMEOUT) ? NIL : &ctr;
yuuji@0 158 char *s,*hostname,tmp[MAILTMPLEN];
yuuji@0 159 void *adr;
yuuji@0 160 size_t adrlen;
yuuji@0 161 struct servent *sv = NIL;
yuuji@0 162 blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
yuuji@0 163 void *data,*next;
yuuji@0 164 port &= 0xffff; /* erase flags */
yuuji@0 165 /* lookup service */
yuuji@0 166 if (service && (sv = getservbyname (service,"tcp")))
yuuji@0 167 port = ntohs (sv->s_port);
yuuji@0 168 /* The domain literal form is used (rather than simply the dotted decimal
yuuji@0 169 as with other Unix programs) because it has to be a valid "host name"
yuuji@0 170 in mailsystem terminology. */
yuuji@0 171 /* look like domain literal? */
yuuji@0 172 if (host[0] == '[' && host[(strlen (host))-1] == ']') {
yuuji@0 173 strcpy (tmp,host+1); /* yes, copy number part */
yuuji@0 174 tmp[(strlen (tmp))-1] = '\0';
yuuji@0 175 if (adr = ip_stringtoaddr (tmp,&adrlen,&family)) {
yuuji@0 176 (*bn) (BLOCK_TCPOPEN,NIL);
yuuji@0 177 /* get an open socket for this system */
yuuji@0 178 sock = tcp_socket_open (family,adr,adrlen,port,tmp,ctrp,hostname = host);
yuuji@0 179 (*bn) (BLOCK_NONE,NIL);
yuuji@0 180 fs_give ((void **) &adr);
yuuji@0 181 }
yuuji@0 182 else sprintf (tmp,"Bad format domain-literal: %.80s",host);
yuuji@0 183 }
yuuji@0 184
yuuji@0 185 else { /* lookup host name */
yuuji@0 186 if (tcpdebug) {
yuuji@0 187 sprintf (tmp,"DNS resolution %.80s",host);
yuuji@0 188 mm_log (tmp,TCPDEBUG);
yuuji@0 189 }
yuuji@0 190 (*bn) (BLOCK_DNSLOOKUP,NIL);/* quell alarms */
yuuji@0 191 data = (*bn) (BLOCK_SENSITIVE,NIL);
yuuji@0 192 if (!(s = ip_nametoaddr (host,&adrlen,&family,&hostname,&next)))
yuuji@0 193 sprintf (tmp,"No such host as %.80s",host);
yuuji@0 194 (*bn) (BLOCK_NONSENSITIVE,data);
yuuji@0 195 (*bn) (BLOCK_NONE,NIL);
yuuji@0 196 if (s) { /* DNS resolution won? */
yuuji@0 197 if (tcpdebug) mm_log ("DNS resolution done",TCPDEBUG);
yuuji@0 198 do {
yuuji@0 199 (*bn) (BLOCK_TCPOPEN,NIL);
yuuji@0 200 if (((sock = tcp_socket_open (family,s,adrlen,port,tmp,ctrp,
yuuji@0 201 hostname)) < 0) &&
yuuji@0 202 (s = ip_nametoaddr (NIL,&adrlen,&family,&hostname,&next)) &&
yuuji@0 203 !silent) mm_log (tmp,WARN);
yuuji@0 204 (*bn) (BLOCK_NONE,NIL);
yuuji@0 205 } while ((sock < 0) && s);/* repeat until success or no more addreses */
yuuji@0 206 }
yuuji@0 207 }
yuuji@0 208 if (sock >= 0) { /* won */
yuuji@0 209 stream = (TCPSTREAM *) memset (fs_get (sizeof (TCPSTREAM)),0,
yuuji@0 210 sizeof (TCPSTREAM));
yuuji@0 211 stream->port = port; /* port number */
yuuji@0 212 /* init sockets */
yuuji@0 213 stream->tcpsi = stream->tcpso = sock;
yuuji@0 214 /* stash in the snuck-in byte */
yuuji@0 215 if (stream->ictr = ctr) *(stream->iptr = stream->ibuf) = tmp[0];
yuuji@0 216 /* copy official host name */
yuuji@0 217 stream->host = cpystr (hostname);
yuuji@0 218 if (tcpdebug) mm_log ("Stream open and ready for read",TCPDEBUG);
yuuji@0 219 }
yuuji@0 220 else if (!silent) mm_log (tmp,ERROR);
yuuji@0 221 return stream; /* return success */
yuuji@0 222 }
yuuji@0 223
yuuji@0 224 /* Open a TCP socket
yuuji@0 225 * Accepts: protocol family
yuuji@0 226 * address to connect to
yuuji@0 227 * address length
yuuji@0 228 * port
yuuji@0 229 * scratch buffer
yuuji@0 230 * pointer to "first byte read in" storage or NIL
yuuji@0 231 * host name for error message
yuuji@0 232 * Returns: socket if success, else -1 with error string in scratch buffer
yuuji@0 233 */
yuuji@0 234
yuuji@0 235 int tcp_socket_open (int family,void *adr,size_t adrlen,unsigned short port,
yuuji@0 236 char *tmp,int *ctr,char *hst)
yuuji@0 237 {
yuuji@0 238 int i,ti,sock,flgs;
yuuji@0 239 size_t len;
yuuji@0 240 time_t now;
yuuji@0 241 struct protoent *pt = getprotobyname ("tcp");
yuuji@0 242 fd_set fds,efds;
yuuji@0 243 struct timeval tmo;
yuuji@0 244 struct sockaddr *sadr = ip_sockaddr (family,adr,adrlen,port,&len);
yuuji@0 245 blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
yuuji@0 246 /* fetid Solaris */
yuuji@0 247 void *data = (*bn) (BLOCK_SENSITIVE,NIL);
yuuji@0 248 sprintf (tmp,"Trying IP address [%s]",ip_sockaddrtostring (sadr));
yuuji@0 249 mm_log (tmp,NIL);
yuuji@0 250 /* make a socket */
yuuji@0 251 if ((sock = socket (sadr->sa_family,SOCK_STREAM,pt ? pt->p_proto : 0)) < 0) {
yuuji@0 252 sprintf (tmp,"Unable to create TCP socket: %s",strerror (errno));
yuuji@0 253 (*bn) (BLOCK_NONSENSITIVE,data);
yuuji@0 254 }
yuuji@0 255 else if (sock >= FD_SETSIZE) {/* unselectable sockets are useless */
yuuji@0 256 sprintf (tmp,"Unable to create selectable TCP socket (%d >= %d)",
yuuji@0 257 sock,FD_SETSIZE);
yuuji@0 258 (*bn) (BLOCK_NONSENSITIVE,data);
yuuji@0 259 close (sock);
yuuji@0 260 sock = -1;
yuuji@0 261 errno = EMFILE;
yuuji@0 262 }
yuuji@0 263
yuuji@0 264 else { /* get current socket flags */
yuuji@0 265 flgs = fcntl (sock,F_GETFL,0);
yuuji@0 266 /* set non-blocking if want open timeout */
yuuji@0 267 if (ctr) fcntl (sock,F_SETFL,flgs | FNDELAY);
yuuji@0 268 /* open connection */
yuuji@0 269 while ((i = connect (sock,sadr,len)) < 0 && (errno == EINTR));
yuuji@0 270 (*bn) (BLOCK_NONSENSITIVE,data);
yuuji@0 271 if (i < 0) switch (errno) { /* failed? */
yuuji@0 272 case EAGAIN: /* DG brain damage */
yuuji@0 273 case EINPROGRESS: /* what we expect to happen */
yuuji@0 274 case EALREADY: /* or another form of it */
yuuji@0 275 case EISCONN: /* restart after interrupt? */
yuuji@0 276 case EADDRINUSE: /* restart after interrupt? */
yuuji@0 277 break; /* well, not really, it was interrupted */
yuuji@0 278 default:
yuuji@0 279 sprintf (tmp,"Can't connect to %.80s,%u: %s",hst,(unsigned int) port,
yuuji@0 280 strerror (errno));
yuuji@0 281 close (sock); /* flush socket */
yuuji@0 282 sock = -1;
yuuji@0 283 }
yuuji@0 284 if ((sock >= 0) && ctr) { /* want open timeout? */
yuuji@0 285 now = time (0); /* open timeout */
yuuji@0 286 ti = ttmo_open ? now + ttmo_open : 0;
yuuji@0 287 tmo.tv_usec = 0;
yuuji@0 288 FD_ZERO (&fds); /* initialize selection vector */
yuuji@0 289 FD_ZERO (&efds); /* handle errors too */
yuuji@0 290 FD_SET (sock,&fds); /* block for error or readable */
yuuji@0 291 FD_SET (sock,&efds);
yuuji@0 292 do { /* block under timeout */
yuuji@0 293 tmo.tv_sec = ti ? ti - now : 0;
yuuji@0 294 i = select (sock+1,&fds,NIL,&efds,ti ? &tmo : NIL);
yuuji@0 295 now = time (0); /* fake timeout if interrupt & time expired */
yuuji@0 296 if ((i < 0) && (errno == EINTR) && ti && (ti <= now)) i = 0;
yuuji@0 297 } while ((i < 0) && (errno == EINTR));
yuuji@0 298 if (i > 0) { /* success, make sure really connected */
yuuji@0 299 /* restore blocking status */
yuuji@0 300 fcntl (sock,F_SETFL,flgs);
yuuji@0 301 /* This used to be a zero-byte read(), but that crashes Solaris */
yuuji@0 302 /* get socket status */
yuuji@0 303 while (((i = *ctr = read (sock,tmp,1)) < 0) && (errno == EINTR));
yuuji@0 304 }
yuuji@0 305 if (i <= 0) { /* timeout or error? */
yuuji@0 306 i = i ? errno : ETIMEDOUT;/* determine error code */
yuuji@0 307 close (sock); /* flush socket */
yuuji@0 308 sock = -1;
yuuji@0 309 errno = i; /* return error code */
yuuji@0 310 sprintf (tmp,"Connection failed to %.80s,%lu: %s",hst,
yuuji@0 311 (unsigned long) port,strerror (errno));
yuuji@0 312 }
yuuji@0 313 }
yuuji@0 314 }
yuuji@0 315 fs_give ((void **) &sadr);
yuuji@0 316 return sock; /* return the socket */
yuuji@0 317 }
yuuji@0 318
yuuji@0 319 /* TCP/IP authenticated open
yuuji@0 320 * Accepts: host name
yuuji@0 321 * 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@0 821 /* TCP/IP get client host address (server calls only)
yuuji@0 822 * Returns: client host address
yuuji@0 823 */
yuuji@0 824
yuuji@0 825 char *tcp_clientaddr ()
yuuji@0 826 {
yuuji@0 827 if (!myClientAddr) {
yuuji@0 828 size_t sadrlen;
yuuji@0 829 struct sockaddr *sadr = ip_newsockaddr (&sadrlen);
yuuji@0 830 if (getpeername (0,sadr,(void *) &sadrlen))
yuuji@0 831 myClientAddr = cpystr ("UNKNOWN");
yuuji@0 832 else { /* get stdin's peer name */
yuuji@0 833 myClientAddr = cpystr (ip_sockaddrtostring (sadr));
yuuji@0 834 if (myClientPort < 0) myClientPort = ip_sockaddrtoport (sadr);
yuuji@0 835 }
yuuji@0 836 fs_give ((void **) &sadr);
yuuji@0 837 }
yuuji@0 838 return myClientAddr;
yuuji@0 839 }
yuuji@0 840
yuuji@0 841
yuuji@0 842 /* TCP/IP get client host name (server calls only)
yuuji@0 843 * Returns: client host name
yuuji@0 844 */
yuuji@0 845
yuuji@0 846 char *tcp_clienthost ()
yuuji@0 847 {
yuuji@0 848 if (!myClientHost) {
yuuji@0 849 size_t sadrlen;
yuuji@0 850 struct sockaddr *sadr = ip_newsockaddr (&sadrlen);
yuuji@0 851 if (getpeername (0,sadr,(void *) &sadrlen)) {
yuuji@0 852 char *s,*t,*v,tmp[MAILTMPLEN];
yuuji@0 853 if ((s = getenv (t = "SSH_CLIENT")) ||
yuuji@0 854 (s = getenv (t = "KRB5REMOTEADDR")) ||
yuuji@0 855 (s = getenv (t = "SSH2_CLIENT"))) {
yuuji@0 856 if (v = strchr (s,' ')) *v = '\0';
yuuji@0 857 sprintf (v = tmp,"%.80s=%.80s",t,s);
yuuji@0 858 }
yuuji@0 859 else v = "UNKNOWN";
yuuji@0 860 myClientHost = cpystr (v);
yuuji@0 861 }
yuuji@0 862 else { /* get stdin's peer name */
yuuji@0 863 myClientHost = tcp_name (sadr,T);
yuuji@0 864 if (!myClientAddr) myClientAddr = cpystr (ip_sockaddrtostring (sadr));
yuuji@0 865 if (myClientPort < 0) myClientPort = ip_sockaddrtoport (sadr);
yuuji@0 866 }
yuuji@0 867 fs_give ((void **) &sadr);
yuuji@0 868 }
yuuji@0 869 return myClientHost;
yuuji@0 870 }
yuuji@0 871
yuuji@0 872
yuuji@0 873 /* TCP/IP get client port number (server calls only)
yuuji@0 874 * Returns: client port number
yuuji@0 875 */
yuuji@0 876
yuuji@0 877 long tcp_clientport ()
yuuji@0 878 {
yuuji@0 879 if (!myClientHost && !myClientAddr) tcp_clientaddr ();
yuuji@0 880 return myClientPort;
yuuji@0 881 }
yuuji@0 882
yuuji@0 883 /* TCP/IP get server host address (server calls only)
yuuji@0 884 * Returns: server host address
yuuji@0 885 */
yuuji@0 886
yuuji@0 887 char *tcp_serveraddr ()
yuuji@0 888 {
yuuji@0 889 if (!myServerAddr) {
yuuji@0 890 size_t sadrlen;
yuuji@0 891 struct sockaddr *sadr = ip_newsockaddr (&sadrlen);
yuuji@0 892 if (getsockname (0,sadr,(void *) &sadrlen))
yuuji@0 893 myServerAddr = cpystr ("UNKNOWN");
yuuji@0 894 else { /* get stdin's name */
yuuji@0 895 myServerAddr = cpystr (ip_sockaddrtostring (sadr));
yuuji@0 896 if (myServerPort < 0) myServerPort = ip_sockaddrtoport (sadr);
yuuji@0 897 }
yuuji@0 898 fs_give ((void **) &sadr);
yuuji@0 899 }
yuuji@0 900 return myServerAddr;
yuuji@0 901 }
yuuji@0 902
yuuji@0 903
yuuji@0 904 /* TCP/IP get server host name (server calls only)
yuuji@0 905 * Returns: server host name
yuuji@0 906 */
yuuji@0 907
yuuji@0 908 char *tcp_serverhost ()
yuuji@0 909 {
yuuji@0 910 if (!myServerHost) { /* once-only */
yuuji@0 911 size_t sadrlen;
yuuji@0 912 struct sockaddr *sadr = ip_newsockaddr (&sadrlen);
yuuji@0 913 /* get stdin's name */
yuuji@0 914 if (getsockname (0,sadr,(void *) &sadrlen))
yuuji@0 915 myServerHost = cpystr (mylocalhost ());
yuuji@0 916 else { /* get stdin's name */
yuuji@0 917 myServerHost = tcp_name (sadr,NIL);
yuuji@0 918 if (!myServerAddr) 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 myServerHost;
yuuji@0 924 }
yuuji@0 925
yuuji@0 926
yuuji@0 927 /* TCP/IP get server port number (server calls only)
yuuji@0 928 * Returns: server port number
yuuji@0 929 */
yuuji@0 930
yuuji@0 931 long tcp_serverport ()
yuuji@0 932 {
yuuji@0 933 if (!myServerHost && !myServerAddr) tcp_serveraddr ();
yuuji@0 934 return myServerPort;
yuuji@0 935 }
yuuji@0 936
yuuji@0 937 /* TCP/IP return canonical form of host name
yuuji@0 938 * Accepts: host name
yuuji@0 939 * Returns: canonical form of host name
yuuji@0 940 */
yuuji@0 941
yuuji@0 942 char *tcp_canonical (char *name)
yuuji@0 943 {
yuuji@0 944 char *ret,host[MAILTMPLEN];
yuuji@0 945 blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
yuuji@0 946 void *data;
yuuji@0 947 /* look like domain literal? */
yuuji@0 948 if (name[0] == '[' && name[strlen (name) - 1] == ']') return name;
yuuji@0 949 (*bn) (BLOCK_DNSLOOKUP,NIL); /* quell alarms */
yuuji@0 950 data = (*bn) (BLOCK_SENSITIVE,NIL);
yuuji@0 951 if (tcpdebug) {
yuuji@0 952 sprintf (host,"DNS canonicalization %.80s",name);
yuuji@0 953 mm_log (host,TCPDEBUG);
yuuji@0 954 }
yuuji@0 955 /* get canonical name */
yuuji@0 956 if (!ip_nametoaddr (name,NIL,NIL,&ret,NIL)) ret = name;
yuuji@0 957 (*bn) (BLOCK_NONSENSITIVE,data);
yuuji@0 958 (*bn) (BLOCK_NONE,NIL); /* alarms OK now */
yuuji@0 959 if (tcpdebug) mm_log ("DNS canonicalization done",TCPDEBUG);
yuuji@0 960 return ret;
yuuji@0 961 }
yuuji@0 962
yuuji@0 963 /* TCP/IP return name from socket
yuuji@0 964 * Accepts: socket
yuuji@0 965 * verbose flag
yuuji@0 966 * Returns: cpystr name
yuuji@0 967 */
yuuji@0 968
yuuji@0 969 char *tcp_name (struct sockaddr *sadr,long flag)
yuuji@0 970 {
yuuji@0 971 char *ret,*t,adr[MAILTMPLEN],tmp[MAILTMPLEN];
yuuji@0 972 sprintf (ret = adr,"[%.80s]",ip_sockaddrtostring (sadr));
yuuji@0 973 if (allowreversedns) {
yuuji@0 974 blocknotify_t bn = (blocknotify_t)mail_parameters(NIL,GET_BLOCKNOTIFY,NIL);
yuuji@0 975 void *data;
yuuji@0 976 if (tcpdebug) {
yuuji@0 977 sprintf (tmp,"Reverse DNS resolution %s",adr);
yuuji@0 978 mm_log (tmp,TCPDEBUG);
yuuji@0 979 }
yuuji@0 980 (*bn) (BLOCK_DNSLOOKUP,NIL);/* quell alarms */
yuuji@0 981 data = (*bn) (BLOCK_SENSITIVE,NIL);
yuuji@0 982 /* translate address to name */
yuuji@0 983 if (t = tcp_name_valid (ip_sockaddrtoname (sadr))) {
yuuji@0 984 /* produce verbose form if needed */
yuuji@0 985 if (flag) sprintf (ret = tmp,"%s %s",t,adr);
yuuji@0 986 else ret = t;
yuuji@0 987 }
yuuji@0 988 (*bn) (BLOCK_NONSENSITIVE,data);
yuuji@0 989 (*bn) (BLOCK_NONE,NIL); /* alarms OK now */
yuuji@0 990 if (tcpdebug) mm_log ("Reverse DNS resolution done",TCPDEBUG);
yuuji@0 991 }
yuuji@0 992 return cpystr (ret);
yuuji@0 993 }
yuuji@0 994
yuuji@0 995
yuuji@0 996 /* TCP/IP validate name
yuuji@0 997 * Accepts: domain name
yuuji@0 998 * Returns: name if valid, NIL otherwise
yuuji@0 999 */
yuuji@0 1000
yuuji@0 1001 char *tcp_name_valid (char *s)
yuuji@0 1002 {
yuuji@0 1003 int c;
yuuji@0 1004 char *ret,*tail;
yuuji@0 1005 /* must be non-empty and not too long */
yuuji@0 1006 if ((ret = (s && *s) ? s : NIL) && (tail = ret + NETMAXHOST)) {
yuuji@0 1007 /* must be alnum, dot, or hyphen */
yuuji@0 1008 while ((c = *s++) && (s <= tail) &&
yuuji@0 1009 (((c >= 'A') && (c <= 'Z')) || ((c >= 'a') && (c <= 'z')) ||
yuuji@0 1010 ((c >= '0') && (c <= '9')) || (c == '-') || (c == '.')));
yuuji@0 1011 if (c) ret = NIL;
yuuji@0 1012 }
yuuji@0 1013 return ret;
yuuji@0 1014 }
yuuji@0 1015
yuuji@0 1016 /* TCP/IP check if client is given host name
yuuji@0 1017 * Accepts: candidate host name
yuuji@0 1018 * Returns: T if match, NIL otherwise
yuuji@0 1019 */
yuuji@0 1020
yuuji@0 1021 long tcp_isclienthost (char *host)
yuuji@0 1022 {
yuuji@0 1023 int family;
yuuji@0 1024 size_t adrlen,sadrlen,len;
yuuji@0 1025 void *adr,*next;
yuuji@0 1026 struct sockaddr *sadr;
yuuji@0 1027 long ret = NIL;
yuuji@0 1028 /* make sure that myClientAddr is set */
yuuji@0 1029 if (tcp_clienthost () && myClientAddr)
yuuji@0 1030 /* get sockaddr of client */
yuuji@0 1031 for (adr = ip_nametoaddr (host,&adrlen,&family,NIL,&next); adr && !ret;
yuuji@0 1032 adr = ip_nametoaddr (NIL,&adrlen,&family,NIL,&next)) {
yuuji@0 1033 /* build sockaddr of given address */
yuuji@0 1034 sadr = ip_sockaddr (family,adr,adrlen,1,&len);
yuuji@0 1035 if (!strcmp (myClientAddr,ip_sockaddrtostring (sadr))) ret = LONGT;
yuuji@0 1036 fs_give ((void **) &sadr); /* done with client sockaddr */
yuuji@0 1037 }
yuuji@0 1038 return ret;
yuuji@0 1039 }
yuuji@0 1040
yuuji@0 1041 /* Following statement must be at end of this module */
yuuji@0 1042
yuuji@0 1043 #undef fork /* undo any use of vfork() */

UW-IMAP'd extensions by yuuji