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- /*
- * Program: Operating-system dependent routines -- Ultrix version
- *
- * Author: Mark Crispin
- * Networks and Distributed Computing
- * Computing & Communications
- * University of Washington
- * Administration Building, AG-44
- * Seattle, WA 98195
- * Internet: MRC@CAC.Washington.EDU
- *
- * Date: 1 August 1988
- * Last Edited: 14 May 1992
- *
- * Copyright 1992 by the University of Washington
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted, provided
- * that the above copyright notice appears in all copies and that both the
- * above copyright notice and this permission notice appear in supporting
- * documentation, and that the name of the University of Washington not be
- * used in advertising or publicity pertaining to distribution of the software
- * without specific, written prior permission. This software is made
- * available "as is", and
- * THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
- * WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
- * NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
- * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
- * (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
- * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
-
- /* TCP input buffer */
-
- #define BUFLEN 8192
-
-
- /* TCP I/O stream (must be before osdep.h is included) */
-
- #define TCPSTREAM struct tcp_stream
- TCPSTREAM {
- char *host; /* host name */
- char *localhost; /* local host name */
- int tcpsi; /* input socket */
- int tcpso; /* output socket */
- int ictr; /* input counter */
- char *iptr; /* input pointer */
- char ibuf[BUFLEN]; /* input buffer */
- };
-
-
- #include <sys/types.h>
- #include <sys/time.h>
- #include <sys/socket.h>
- #include <netinet/in.h>
- #include <netdb.h>
- #include <ctype.h>
- #include <errno.h>
- extern int errno; /* just in case */
- #include <pwd.h>
- #include <syslog.h>
- #include "osdep.h"
- #include "mail.h"
- #include "misc.h"
-
- /* Write current time in RFC 822 format
- * Accepts: destination string
- */
-
- char *days[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
- char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
- "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
-
- void rfc822_date (date)
- char *date;
- {
- int zone;
- char *zonename;
- struct tm *t;
- struct timeval tv;
- struct timezone tz;
- gettimeofday (&tv,&tz); /* get time and timezone poop */
- t = localtime (&tv.tv_sec); /* convert to individual items */
- zone = t->tm_gmtoff/60; /* get timezone from TZ environment stuff */
- zonename = t->tm_zone;
- /* and output it */
- sprintf (date,"%s, %d %s %d %02d:%02d:%02d %+03d%02d (%s)",
- days[t->tm_wday],t->tm_mday,months[t->tm_mon],t->tm_year+1900,
- t->tm_hour,t->tm_min,t->tm_sec,zone/60,abs (zone) % 60,zonename);
- }
-
- /* Get a block of free storage
- * Accepts: size of desired block
- * Returns: free storage block
- */
-
- void *fs_get (size)
- size_t size;
- {
- void *block = malloc (size);
- if (!block) fatal ("Out of free storage");
- return (block);
- }
-
-
- /* Resize a block of free storage
- * Accepts: ** pointer to current block
- * new size
- */
-
- void fs_resize (block,size)
- void **block;
- size_t size;
- {
- if (!(*block = realloc (*block,size))) fatal ("Can't resize free storage");
- }
-
-
- /* Return a block of free storage
- * Accepts: ** pointer to free storage block
- */
-
- void fs_give (block)
- void **block;
- {
- free (*block);
- *block = NIL;
- }
-
-
- /* Report a fatal error
- * Accepts: string to output
- */
-
- void fatal (string)
- char *string;
- {
- mm_fatal (string); /* output the string */
- syslog (LOG_ALERT,"IMAP C-Client crash: %s",string);
- abort (); /* die horribly */
- }
-
- /* Copy string with CRLF newlines
- * Accepts: destination string
- * pointer to size of destination string
- * source string
- * length of source string
- */
-
- char *strcrlfcpy (dst,dstl,src,srcl)
- char **dst;
- unsigned long *dstl;
- char *src;
- unsigned long srcl;
- {
- long i,j;
- char *d = src;
- /* count number of LF's in source string(s) */
- for (i = srcl,j = 0; j < srcl; j++) if (*d++ == '\012') i++;
- if (i > *dstl) { /* resize if not enough space */
- fs_give ((void **) dst); /* fs_resize does an unnecessary copy */
- *dst = (char *) fs_get ((*dstl = i) + 1);
- }
- d = *dst; /* destination string */
- /* copy strings, inserting CR's before LF's */
- while (srcl--) switch (*src) {
- case '\015': /* unlikely carriage return */
- *d++ = *src++; /* copy it and any succeeding linefeed */
- if (srcl && *src == '\012') {
- *d++ = *src++;
- srcl--;
- }
- break;
- case '\012': /* line feed? */
- *d++ ='\015'; /* yes, prepend a CR, drop into default case */
- default: /* ordinary chararacter */
- *d++ = *src++; /* just copy character */
- break;
- }
- *d = '\0'; /* tie off destination */
- return *dst; /* return destination */
- }
-
-
- /* Length of string after strcrlflen applied
- * Accepts: source string
- * length of source string
- */
-
- unsigned long strcrlflen (src,srcl)
- char *src;
- unsigned long srcl;
- {
- long i = srcl; /* look for LF's */
- while (srcl--) switch (*src++) {
- case '\015': /* unlikely carriage return */
- if (srcl && *src == '\012') { src++; srcl--; }
- break;
- case '\012': /* line feed? */
- i++;
- default: /* ordinary chararacter */
- break;
- }
- return i;
- }
-
- /* Server log in
- * Accepts: user name string
- * password string
- * optional place to return home directory
- * Returns: T if password validated, NIL otherwise
- */
-
- long server_login (user,pass,home)
- char *user;
- char *pass;
- char **home;
- {
- struct passwd *pw = getpwnam (lcase (user));
- /* no entry for this user or root */
- if (!(pw && pw->pw_uid)) return NIL;
- /* validate password */
- if (strcmp (pw->pw_passwd,(char *) crypt (pass,pw->pw_passwd))) return NIL;
- setgid (pw->pw_gid); /* all OK, login in as that user */
- setuid (pw->pw_uid);
- /* note home directory */
- if (home) *home = cpystr (pw->pw_dir);
- return T;
- }
-
- /* TCP/IP open
- * Accepts: host name
- * contact port number
- * Returns: TCP/IP stream if success else NIL
- */
-
- TCPSTREAM *tcp_open (host,port)
- char *host;
- long port;
- {
- TCPSTREAM *stream = NIL;
- int sock;
- char *s;
- struct sockaddr_in sin;
- struct hostent *host_name;
- char hostname[MAILTMPLEN];
- char tmp[MAILTMPLEN];
- /* The domain literal form is used (rather than simply the dotted decimal
- as with other Unix programs) because it has to be a valid "host name"
- in mailsystem terminology. */
- /* look like domain literal? */
- if (host[0] == '[' && host[(strlen (host))-1] == ']') {
- strcpy (hostname,host+1); /* yes, copy number part */
- hostname[(strlen (hostname))-1] = '\0';
- if ((sin.sin_addr.s_addr = inet_addr (hostname)) != -1) {
- sin.sin_family = AF_INET; /* family is always Internet */
- strcpy (hostname,host); /* hostname is user's argument */
- }
- else {
- sprintf (tmp,"Bad format domain-literal: %.80s",host);
- mm_log (tmp,ERROR);
- return NIL;
- }
- }
-
- else { /* lookup host name, note that brain-dead Unix
- requires lowercase! */
- strcpy (hostname,host); /* in case host is in write-protected memory */
- if ((host_name = gethostbyname (lcase (hostname)))) {
- /* copy address type */
- sin.sin_family = host_name->h_addrtype;
- /* copy host name */
- strcpy (hostname,host_name->h_name);
- /* copy host addresses */
- memcpy (&sin.sin_addr,host_name->h_addr,host_name->h_length);
- }
- else {
- sprintf (tmp,"No such host as %.80s",host);
- mm_log (tmp,ERROR);
- return NIL;
- }
- }
-
- /* copy port number in network format */
- if (!(sin.sin_port = htons (port))) fatal ("Bad port argument to tcp_open");
- /* get a TCP stream */
- if ((sock = socket (sin.sin_family,SOCK_STREAM,0)) < 0) {
- sprintf (tmp,"Unable to create TCP socket: %s",strerror (errno));
- mm_log (tmp,ERROR);
- return NIL;
- }
- /* open connection */
- if (connect (sock,(struct sockaddr *)&sin,sizeof (sin)) < 0) {
- sprintf (tmp,"Can't connect to %.80s,%d: %s",hostname,port,
- strerror (errno));
- mm_log (tmp,ERROR);
- return NIL;
- }
- /* create TCP/IP stream */
- stream = (TCPSTREAM *) fs_get (sizeof (TCPSTREAM));
- /* copy official host name */
- stream->host = cpystr (hostname);
- /* get local name */
- gethostname (tmp,MAILTMPLEN-1);
- stream->localhost = cpystr ((host_name = gethostbyname (tmp)) ?
- host_name->h_name : tmp);
- /* init sockets */
- stream->tcpsi = stream->tcpso = sock;
- stream->ictr = 0; /* init input counter */
- return stream; /* return success */
- }
-
- /* TCP/IP authenticated open
- * Accepts: host name
- * service name
- * Returns: TCP/IP stream if success else NIL
- */
-
- TCPSTREAM *tcp_aopen (host,service)
- char *host;
- char *service;
- {
- TCPSTREAM *stream = NIL;
- struct hostent *host_name;
- char hostname[MAILTMPLEN];
- int i;
- int pipei[2],pipeo[2];
- /* The domain literal form is used (rather than simply the dotted decimal
- as with other Unix programs) because it has to be a valid "host name"
- in mailsystem terminology. */
- /* look like domain literal? */
- if (host[0] == '[' && host[i = (strlen (host))-1] == ']') {
- strcpy (hostname,host+1); /* yes, copy without brackets */
- hostname[i-1] = '\0';
- }
- /* note that Unix requires lowercase! */
- else if (host_name = gethostbyname (lcase (strcpy (hostname,host))))
- strcpy (hostname,host_name->h_name);
- /* make command pipes */
- if (pipe (pipei) < 0) return NIL;
- if (pipe (pipeo) < 0) {
- close (pipei[0]); close (pipei[1]);
- return NIL;
- }
- if ((i = fork ()) < 0) { /* make inferior process */
- close (pipei[0]); close (pipei[1]);
- close (pipeo[0]); close (pipeo[1]);
- return NIL;
- }
- if (i) { /* parent? */
- close (pipei[1]); /* close child's side of the pipes */
- close (pipeo[0]);
- }
- else { /* child */
- dup2 (pipei[1],1); /* parent's input is my output */
- dup2 (pipei[1],2); /* parent's input is my error output too */
- close (pipei[0]); close (pipei[1]);
- dup2 (pipeo[0],0); /* parent's output is my input */
- close (pipeo[0]); close (pipeo[1]);
- /* now run it */
- execl ("/usr/ucb/rsh","rsh",hostname,"exec",service,0);
- _exit (1); /* spazzed */
- }
-
- /* create TCP/IP stream */
- stream = (TCPSTREAM *) fs_get (sizeof (TCPSTREAM));
- /* copy official host name */
- stream->host = cpystr (hostname);
- /* get local name */
- gethostname (hostname,MAILTMPLEN-1);
- stream->localhost = cpystr ((host_name = gethostbyname (hostname)) ?
- host_name->h_name : hostname);
- stream->tcpsi = pipei[0]; /* init sockets */
- stream->tcpso = pipeo[1];
- stream->ictr = 0; /* init input counter */
- return stream; /* return success */
- }
-
- /* TCP/IP receive line
- * Accepts: TCP/IP stream
- * Returns: text line string or NIL if failure
- */
-
- char *tcp_getline (stream)
- TCPSTREAM *stream;
- {
- int n,m;
- char *st;
- char *ret;
- char *stp;
- char tmp[2];
- fd_set fds;
- FD_ZERO (&fds); /* initialize selection vector */
- if (stream->tcpsi < 0) return NIL;
- while (stream->ictr < 1) { /* if nothing in the buffer */
- FD_SET (stream->tcpsi,&fds);/* set bit in selection vector */
- /* block and read */
- if ((select (stream->tcpsi+1,&fds,0,0,0) < 0) ||
- ((stream->ictr = read (stream->tcpsi,stream->ibuf,BUFLEN)) < 1)) {
- close (stream->tcpsi); /* nuke the socket */
- if (stream->tcpsi != stream->tcpso) close (stream->tcpso);
- stream->tcpsi = stream->tcpso = -1;
- return NIL;
- }
- stream->iptr = stream->ibuf;/* point at TCP buffer */
- }
- st = stream->iptr; /* save start of string */
- n = 0; /* init string count */
- while (stream->ictr--) { /* look for end of line */
- /* saw the trailing CR? */
- if (stream->iptr++[0] == '\015') {
- ret = (char *) fs_get (n+1);
- memcpy (ret,st,n); /* copy into a free storage string */
- ret[n] = '\0'; /* tie off string with null */
- /* eat the line feed */
- tcp_getbuffer (stream,1,tmp);
- return ret; /* return it to caller */
- }
- ++n; /* else count and try next character */
- }
- stp = (char *) fs_get (n); /* copy first part of string */
- memcpy (stp,st,n);
- /* recurse to get remainder */
- if (st = tcp_getline (stream)) {
- /* build total string */
- ret = (char *) fs_get (n+1+(m = strlen (st)));
- memcpy (ret,stp,n); /* copy first part */
- memcpy (ret+n,st,m); /* and second part */
- ret[n+m] = '\0'; /* tie off string with null */
- fs_give ((void **) &st); /* flush partial string */
- fs_give ((void **) &stp); /* flush initial fragment */
- }
- else ret = stp; /* return the fragment */
- return ret;
- }
-
- /* TCP/IP receive buffer
- * Accepts: TCP/IP stream
- * size in bytes
- * buffer to read into
- * Returns: T if success, NIL otherwise
- */
-
- long tcp_getbuffer (stream,size,buffer)
- TCPSTREAM *stream;
- unsigned long size;
- char *buffer;
- {
- unsigned long n;
- char *bufptr = buffer;
- fd_set fds;
- FD_ZERO (&fds); /* initialize selection vector */
- if (stream->tcpsi < 0) return NIL;
- while (size > 0) { /* until request satisfied */
- while (stream->ictr < 1) { /* if nothing in the buffer */
- FD_SET (stream->tcpsi,&fds);
- /* block and read */
- if ((select (stream->tcpsi+1,&fds,0,0,0) < 0) ||
- ((stream->ictr = read (stream->tcpsi,stream->ibuf,BUFLEN)) < 1)) {
- close (stream->tcpsi); /* nuke the socket */
- if (stream->tcpsi != stream->tcpso) close (stream->tcpso);
- stream->tcpsi = stream->tcpso = -1;
- return NIL;
- }
- /* point at TCP buffer */
- stream->iptr = stream->ibuf;
- }
- n = min (size,stream->ictr);/* number of bytes to transfer */
- /* do the copy */
- memcpy (bufptr,stream->iptr,n);
- bufptr += n; /* update pointer */
- stream->iptr +=n;
- size -= n; /* update # of bytes to do */
- stream->ictr -=n;
- }
- bufptr[0] = '\0'; /* tie off string */
- return T;
- }
-
- /* TCP/IP send string as record
- * Accepts: TCP/IP stream
- * Returns: T if success else NIL
- */
-
- long tcp_soutr (stream,string)
- TCPSTREAM *stream;
- char *string;
- {
- int i;
- unsigned long size = strlen (string);
- fd_set fds;
- FD_ZERO (&fds); /* initialize selection vector */
- if (stream->tcpso < 0) return NIL;
- while (size > 0) { /* until request satisfied */
- FD_SET (stream->tcpso,&fds);/* set bit in selection vector */
- if ((select (stream->tcpso+1,0,&fds,0,0) < 0) ||
- ((i = write (stream->tcpso,string,size)) < 0)) {
- puts (strerror (errno));
- close (stream->tcpsi); /* nuke the socket */
- if (stream->tcpsi != stream->tcpso) close (stream->tcpso);
- stream->tcpsi = stream->tcpso = -1;
- return NIL;
- }
- size -= i; /* count this size */
- string += i;
- }
- return T; /* all done */
- }
-
-
- /* TCP/IP close
- * Accepts: TCP/IP stream
- */
-
- void tcp_close (stream)
- TCPSTREAM *stream;
- {
-
- if (stream->tcpsi >= 0) { /* no-op if no socket */
- close (stream->tcpsi); /* nuke the socket */
- if (stream->tcpsi != stream->tcpso) close (stream->tcpso);
- stream->tcpsi = stream->tcpso = -1;
- }
- /* flush host names */
- fs_give ((void **) &stream->host);
- fs_give ((void **) &stream->localhost);
- fs_give ((void **) &stream); /* flush the stream */
- }
-
- /* TCP/IP get host name
- * Accepts: TCP/IP stream
- * Returns: host name for this stream
- */
-
- char *tcp_host (stream)
- TCPSTREAM *stream;
- {
- return stream->host; /* return host name */
- }
-
-
- /* TCP/IP get local host name
- * Accepts: TCP/IP stream
- * Returns: local host name
- */
-
- char *tcp_localhost (stream)
- TCPSTREAM *stream;
- {
- return stream->localhost; /* return local host name */
- }
-