1 /* 2 * Copyright (c) 1983 Eric P. Allman 3 * Copyright (c) 1988 Regents of the University of California. 4 * All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 */ 8 9 #ifndef lint 10 static char sccsid[] = "@(#)collect.c 5.12 (Berkeley) 07/12/92"; 11 #endif /* not lint */ 12 13 # include <errno.h> 14 # include "sendmail.h" 15 16 /* 17 ** COLLECT -- read & parse message header & make temp file. 18 ** 19 ** Creates a temporary file name and copies the standard 20 ** input to that file. Leading UNIX-style "From" lines are 21 ** stripped off (after important information is extracted). 22 ** 23 ** Parameters: 24 ** smtpmode -- if set, we are running SMTP: give an RFC821 25 ** style message to say we are ready to collect 26 ** input, and never ignore a single dot to mean 27 ** end of message. 28 ** 29 ** Returns: 30 ** none. 31 ** 32 ** Side Effects: 33 ** Temp file is created and filled. 34 ** The from person may be set. 35 */ 36 37 collect(smtpmode, e) 38 bool smtpmode; 39 register ENVELOPE *e; 40 { 41 register FILE *tf; 42 bool ignrdot = smtpmode ? FALSE : IgnrDot; 43 char buf[MAXFIELD], buf2[MAXFIELD]; 44 register char *workbuf, *freebuf; 45 register int workbuflen; 46 extern char *hvalue(); 47 extern bool isheader(), flusheol(); 48 49 /* 50 ** Create the temp file name and create the file. 51 */ 52 53 e->e_df = newstr(queuename(e, 'd')); 54 if ((tf = dfopen(e->e_df, "w")) == NULL) 55 { 56 syserr("Cannot create %s", e->e_df); 57 NoReturn = TRUE; 58 finis(); 59 } 60 (void) chmod(e->e_df, FileMode); 61 62 /* 63 ** Tell ARPANET to go ahead. 64 */ 65 66 if (smtpmode) 67 message("354", "Enter mail, end with \".\" on a line by itself"); 68 69 /* 70 ** Try to read a UNIX-style From line 71 */ 72 73 if (sfgets(buf, MAXFIELD, InChannel) == NULL) 74 goto readerr; 75 fixcrlf(buf, FALSE); 76 # ifndef NOTUNIX 77 if (!SaveFrom && strncmp(buf, "From ", 5) == 0) 78 { 79 if (!flusheol(buf, InChannel)) 80 goto readerr; 81 eatfrom(buf, e); 82 if (sfgets(buf, MAXFIELD, InChannel) == NULL) 83 goto readerr; 84 fixcrlf(buf, FALSE); 85 } 86 # endif NOTUNIX 87 88 /* 89 ** Copy InChannel to temp file & do message editing. 90 ** To keep certain mailers from getting confused, 91 ** and to keep the output clean, lines that look 92 ** like UNIX "From" lines are deleted in the header. 93 */ 94 95 workbuf = buf; /* `workbuf' contains a header field */ 96 freebuf = buf2; /* `freebuf' can be used for read-ahead */ 97 for (;;) 98 { 99 /* first, see if the header is over */ 100 if (!isheader(workbuf)) 101 { 102 fixcrlf(workbuf, TRUE); 103 break; 104 } 105 106 /* if the line is too long, throw the rest away */ 107 if (!flusheol(workbuf, InChannel)) 108 goto readerr; 109 110 /* it's okay to toss '\n' now (flusheol() needed it) */ 111 fixcrlf(workbuf, TRUE); 112 113 workbuflen = strlen(workbuf); 114 115 /* get the rest of this field */ 116 for (;;) 117 { 118 if (sfgets(freebuf, MAXFIELD, InChannel) == NULL) 119 goto readerr; 120 121 /* is this a continuation line? */ 122 if (*freebuf != ' ' && *freebuf != '\t') 123 break; 124 125 if (!flusheol(freebuf, InChannel)) 126 goto readerr; 127 128 /* yes; append line to `workbuf' if there's room */ 129 if (workbuflen < MAXFIELD-3) 130 { 131 register char *p = workbuf + workbuflen; 132 register char *q = freebuf; 133 134 /* we have room for more of this field */ 135 fixcrlf(freebuf, TRUE); 136 *p++ = '\n'; workbuflen++; 137 while(*q != '\0' && workbuflen < MAXFIELD-1) 138 { 139 *p++ = *q++; 140 workbuflen++; 141 } 142 *p = '\0'; 143 } 144 } 145 146 e->e_msgsize += workbuflen; 147 148 /* 149 ** The working buffer now becomes the free buffer, since 150 ** the free buffer contains a new header field. 151 ** 152 ** This is premature, since we still havent called 153 ** chompheader() to process the field we just created 154 ** (so the call to chompheader() will use `freebuf'). 155 ** This convolution is necessary so that if we break out 156 ** of the loop due to H_EOH, `workbuf' will always be 157 ** the next unprocessed buffer. 158 */ 159 160 { 161 register char *tmp = workbuf; 162 workbuf = freebuf; 163 freebuf = tmp; 164 } 165 166 /* 167 ** Snarf header away. 168 */ 169 170 if (bitset(H_EOH, chompheader(freebuf, FALSE, e))) 171 break; 172 } 173 174 if (tTd(30, 1)) 175 printf("EOH\n"); 176 177 if (*workbuf == '\0') 178 { 179 /* throw away a blank line */ 180 if (sfgets(buf, MAXFIELD, InChannel) == NULL) 181 goto readerr; 182 } 183 else if (workbuf == buf2) /* guarantee `buf' contains data */ 184 (void) strcpy(buf, buf2); 185 186 /* 187 ** Collect the body of the message. 188 */ 189 190 do 191 { 192 register char *bp = buf; 193 194 fixcrlf(buf, TRUE); 195 196 /* check for end-of-message */ 197 if (!ignrdot && buf[0] == '.' && (buf[1] == '\n' || buf[1] == '\0')) 198 break; 199 200 /* check for transparent dot */ 201 if (OpMode == MD_SMTP && bp[0] == '.' && bp[1] == '.') 202 bp++; 203 204 /* 205 ** Figure message length, output the line to the temp 206 ** file, and insert a newline if missing. 207 */ 208 209 e->e_msgsize += strlen(bp) + 1; 210 fputs(bp, tf); 211 fputs("\n", tf); 212 if (ferror(tf)) 213 tferror(tf, e); 214 } while (sfgets(buf, MAXFIELD, InChannel) != NULL); 215 216 readerr: 217 if (fflush(tf) != 0) 218 tferror(tf, e); 219 (void) fclose(tf); 220 221 /* An EOF when running SMTP is an error */ 222 if ((feof(InChannel) || ferror(InChannel)) && OpMode == MD_SMTP) 223 { 224 int usrerr(), syserr(); 225 # ifdef LOG 226 if (RealHostName != NULL && LogLevel > 0) 227 syslog(LOG_NOTICE, 228 "collect: unexpected close on connection from %s: %m\n", 229 e->e_from.q_paddr, RealHostName); 230 # endif 231 (feof(InChannel) ? usrerr: syserr) 232 ("collect: unexpected close, from=%s", e->e_from.q_paddr); 233 234 /* don't return an error indication */ 235 e->e_to = NULL; 236 e->e_flags &= ~EF_FATALERRS; 237 238 /* and don't try to deliver the partial message either */ 239 finis(); 240 } 241 242 /* 243 ** Find out some information from the headers. 244 ** Examples are who is the from person & the date. 245 */ 246 247 eatheader(e); 248 249 /* 250 ** Add an Apparently-To: line if we have no recipient lines. 251 */ 252 253 if (hvalue("to", e) == NULL && hvalue("cc", e) == NULL && 254 hvalue("bcc", e) == NULL && hvalue("apparently-to", e) == NULL) 255 { 256 register ADDRESS *q; 257 258 /* create an Apparently-To: field */ 259 /* that or reject the message.... */ 260 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 261 { 262 if (q->q_alias != NULL) 263 continue; 264 if (tTd(30, 3)) 265 printf("Adding Apparently-To: %s\n", q->q_paddr); 266 addheader("apparently-to", q->q_paddr, e); 267 } 268 } 269 270 if ((e->e_dfp = fopen(e->e_df, "r")) == NULL) 271 syserr("Cannot reopen %s", e->e_df); 272 } 273 /* 274 ** FLUSHEOL -- if not at EOL, throw away rest of input line. 275 ** 276 ** Parameters: 277 ** buf -- last line read in (checked for '\n'), 278 ** fp -- file to be read from. 279 ** 280 ** Returns: 281 ** FALSE on error from sfgets(), TRUE otherwise. 282 ** 283 ** Side Effects: 284 ** none. 285 */ 286 287 bool 288 flusheol(buf, fp) 289 char *buf; 290 FILE *fp; 291 { 292 char junkbuf[MAXLINE], *sfgets(); 293 register char *p = buf; 294 295 while (index(p, '\n') == NULL) { 296 if (sfgets(junkbuf,MAXLINE,fp) == NULL) 297 return(FALSE); 298 p = junkbuf; 299 } 300 301 return(TRUE); 302 } 303 /* 304 ** TFERROR -- signal error on writing the temporary file. 305 ** 306 ** Parameters: 307 ** tf -- the file pointer for the temporary file. 308 ** 309 ** Returns: 310 ** none. 311 ** 312 ** Side Effects: 313 ** Gives an error message. 314 ** Arranges for following output to go elsewhere. 315 */ 316 317 tferror(tf, e) 318 FILE *tf; 319 register ENVELOPE *e; 320 { 321 if (errno == ENOSPC) 322 { 323 (void) freopen(e->e_df, "w", tf); 324 fputs("\nMAIL DELETED BECAUSE OF LACK OF DISK SPACE\n\n", tf); 325 usrerr("452 Out of disk space for temp file"); 326 } 327 else 328 syserr("collect: Cannot write %s", e->e_df); 329 (void) freopen("/dev/null", "w", tf); 330 } 331 /* 332 ** EATFROM -- chew up a UNIX style from line and process 333 ** 334 ** This does indeed make some assumptions about the format 335 ** of UNIX messages. 336 ** 337 ** Parameters: 338 ** fm -- the from line. 339 ** 340 ** Returns: 341 ** none. 342 ** 343 ** Side Effects: 344 ** extracts what information it can from the header, 345 ** such as the date. 346 */ 347 348 # ifndef NOTUNIX 349 350 char *DowList[] = 351 { 352 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL 353 }; 354 355 char *MonthList[] = 356 { 357 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 358 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", 359 NULL 360 }; 361 362 eatfrom(fm, e) 363 char *fm; 364 register ENVELOPE *e; 365 { 366 register char *p; 367 register char **dt; 368 369 if (tTd(30, 2)) 370 printf("eatfrom(%s)\n", fm); 371 372 /* find the date part */ 373 p = fm; 374 while (*p != '\0') 375 { 376 /* skip a word */ 377 while (*p != '\0' && *p != ' ') 378 p++; 379 while (*p == ' ') 380 p++; 381 if (!isupper(*p) || p[3] != ' ' || p[13] != ':' || p[16] != ':') 382 continue; 383 384 /* we have a possible date */ 385 for (dt = DowList; *dt != NULL; dt++) 386 if (strncmp(*dt, p, 3) == 0) 387 break; 388 if (*dt == NULL) 389 continue; 390 391 for (dt = MonthList; *dt != NULL; dt++) 392 if (strncmp(*dt, &p[4], 3) == 0) 393 break; 394 if (*dt != NULL) 395 break; 396 } 397 398 if (*p != NULL) 399 { 400 char *q; 401 extern char *arpadate(); 402 403 /* we have found a date */ 404 q = xalloc(25); 405 (void) strncpy(q, p, 25); 406 q[24] = '\0'; 407 define('d', q, e); 408 q = arpadate(q); 409 define('a', newstr(q), e); 410 } 411 } 412 413 # endif NOTUNIX 414