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Diffstat (limited to 'src/headers.c')
| -rw-r--r-- | src/headers.c | 1565 |
1 files changed, 1565 insertions, 0 deletions
diff --git a/src/headers.c b/src/headers.c new file mode 100644 index 0000000..857e9c3 --- /dev/null +++ b/src/headers.c @@ -0,0 +1,1565 @@ +/* + * Copyright (c) 1983, 1995-1997 Eric P. Allman + * Copyright (c) 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)headers.c 8.115 (Berkeley) 10/22/97"; +#endif /* not lint */ + +# include <errno.h> +# include "sendmail.h" + +/* +** SETUPHEADERS -- initialize headers in symbol table +** +** Parameters: +** none +** +** Returns: +** none +*/ + +void +setupheaders() +{ + struct hdrinfo *hi; + STAB *s; + + for (hi = HdrInfo; hi->hi_field != NULL; hi++) + { + s = stab(hi->hi_field, ST_HEADER, ST_ENTER); + s->s_header.hi_flags = hi->hi_flags; + s->s_header.hi_ruleset = NULL; + } +} + /* +** CHOMPHEADER -- process and save a header line. +** +** Called by collect and by readcf to deal with header lines. +** +** Parameters: +** line -- header as a text line. +** def -- if set, this is a default value. +** hdrp -- a pointer to the place to save the header. +** e -- the envelope including this header. +** +** Returns: +** flags for this header. +** +** Side Effects: +** The header is saved on the header list. +** Contents of 'line' are destroyed. +*/ + +struct hdrinfo NormalHeader = { NULL, 0, NULL }; + +int +chompheader(line, def, hdrp, e) + char *line; + bool def; + HDR **hdrp; + register ENVELOPE *e; +{ + register char *p; + register HDR *h; + HDR **hp; + char *fname; + char *fvalue; + bool cond = FALSE; + bool headeronly; + STAB *s; + struct hdrinfo *hi; + BITMAP mopts; + + if (tTd(31, 6)) + { + printf("chompheader: "); + xputs(line); + printf("\n"); + } + + headeronly = hdrp != NULL; + if (!headeronly) + hdrp = &e->e_header; + + /* strip off options */ + clrbitmap(mopts); + p = line; + if (*p == '?') + { + /* have some */ + register char *q = strchr(p + 1, *p); + + if (q != NULL) + { + *q++ = '\0'; + while (*++p != '\0') + setbitn(*p, mopts); + p = q; + } + else + syserr("553 header syntax error, line \"%s\"", line); + cond = TRUE; + } + + /* find canonical name */ + fname = p; + while (isascii(*p) && isgraph(*p) && *p != ':') + p++; + fvalue = p; + while (isascii(*p) && isspace(*p)) + p++; + if (*p++ != ':' || fname == fvalue) + { + syserr("553 header syntax error, line \"%s\"", line); + return 0; + } + *fvalue = '\0'; + fvalue = p; + + /* strip field value on front */ + if (*fvalue == ' ') + fvalue++; + + /* security scan: long field names are end-of-header */ + if (strlen(fname) > 100) + return H_EOH; + +#if _FFR_HEADER_RSCHECK + /* check to see if it represents a ruleset call */ + if (def) + { + char hbuf[50]; + + (void) expand(fvalue, hbuf, sizeof hbuf, e); + for (p = hbuf; isascii(*p) && isspace(*p); ) + p++; + if ((*p++ & 0377) == CALLSUBR) + { + auto char *endp; + + if (strtorwset(p, &endp, ST_ENTER) > 0) + { + *endp = '\0'; + s = stab(fname, ST_HEADER, ST_ENTER); + s->s_header.hi_ruleset = newstr(p); + } + return 0; + } + } +#endif + + /* see if it is a known type */ + s = stab(fname, ST_HEADER, ST_FIND); + if (s != NULL) + hi = &s->s_header; + else + hi = &NormalHeader; + + if (tTd(31, 9)) + { + if (s == NULL) + printf("no header flags match\n"); + else + printf("header match, flags=%x, ruleset=%s\n", + hi->hi_flags, + hi->hi_ruleset == NULL ? "<NULL>" : hi->hi_ruleset); + } + + /* see if this is a resent message */ + if (!def && !headeronly && bitset(H_RESENT, hi->hi_flags)) + e->e_flags |= EF_RESENT; + + /* if this is an Errors-To: header keep track of it now */ + if (UseErrorsTo && !def && !headeronly && + bitset(H_ERRORSTO, hi->hi_flags)) + (void) sendtolist(fvalue, NULLADDR, &e->e_errorqueue, 0, e); + + /* if this means "end of header" quit now */ + if (bitset(H_EOH, hi->hi_flags)) + return hi->hi_flags; + + /* + ** Horrible hack to work around problem with Lotus Notes SMTP + ** mail gateway, which generates From: headers with newlines in + ** them and the <address> on the second line. Although this is + ** legal RFC 822, many MUAs don't handle this properly and thus + ** never find the actual address. + */ + + if (bitset(H_FROM, hi->hi_flags) && SingleLineFromHeader) + { + while ((p = strchr(fvalue, '\n')) != NULL) + *p = ' '; + } + + /* + ** If there is a check ruleset, verify it against the header. + */ + + if (!def && hi->hi_ruleset != NULL) + (void) rscheck(hi->hi_ruleset, fvalue, NULL, e); + + /* + ** Drop explicit From: if same as what we would generate. + ** This is to make MH (which doesn't always give a full name) + ** insert the full name information in all circumstances. + */ + + p = "resent-from"; + if (!bitset(EF_RESENT, e->e_flags)) + p += 7; + if (!def && !headeronly && !bitset(EF_QUEUERUN, e->e_flags) && + strcasecmp(fname, p) == 0) + { + if (tTd(31, 2)) + { + printf("comparing header from (%s) against default (%s or %s)\n", + fvalue, e->e_from.q_paddr, e->e_from.q_user); + } + if (e->e_from.q_paddr != NULL && + (strcmp(fvalue, e->e_from.q_paddr) == 0 || + strcmp(fvalue, e->e_from.q_user) == 0)) + return hi->hi_flags; + } + + /* delete default value for this header */ + for (hp = hdrp; (h = *hp) != NULL; hp = &h->h_link) + { + if (strcasecmp(fname, h->h_field) == 0 && + bitset(H_DEFAULT, h->h_flags) && + !bitset(H_FORCE, h->h_flags)) + { + h->h_value = NULL; + if (!cond) + { + /* copy conditions from default case */ + bcopy((char *)h->h_mflags, (char *)mopts, + sizeof mopts); + } + } + } + + /* create a new node */ + h = (HDR *) xalloc(sizeof *h); + h->h_field = newstr(fname); + h->h_value = newstr(fvalue); + h->h_link = NULL; + bcopy((char *) mopts, (char *) h->h_mflags, sizeof mopts); + *hp = h; + h->h_flags = hi->hi_flags; + if (def) + h->h_flags |= H_DEFAULT; + if (cond) + h->h_flags |= H_CHECK; + + /* hack to see if this is a new format message */ + if (!def && !headeronly && bitset(H_RCPT|H_FROM, h->h_flags) && + (strchr(fvalue, ',') != NULL || strchr(fvalue, '(') != NULL || + strchr(fvalue, '<') != NULL || strchr(fvalue, ';') != NULL)) + { + e->e_flags &= ~EF_OLDSTYLE; + } + + return h->h_flags; +} + /* +** ADDHEADER -- add a header entry to the end of the queue. +** +** This bypasses the special checking of chompheader. +** +** Parameters: +** field -- the name of the header field. +** value -- the value of the field. +** hp -- an indirect pointer to the header structure list. +** +** Returns: +** none. +** +** Side Effects: +** adds the field on the list of headers for this envelope. +*/ + +void +addheader(field, value, hdrlist) + char *field; + char *value; + HDR **hdrlist; +{ + register HDR *h; + STAB *s; + HDR **hp; + + /* find info struct */ + s = stab(field, ST_HEADER, ST_FIND); + + /* find current place in list -- keep back pointer? */ + for (hp = hdrlist; (h = *hp) != NULL; hp = &h->h_link) + { + if (strcasecmp(field, h->h_field) == 0) + break; + } + + /* allocate space for new header */ + h = (HDR *) xalloc(sizeof *h); + h->h_field = field; + h->h_value = newstr(value); + h->h_link = *hp; + h->h_flags = H_DEFAULT; + if (s != NULL) + h->h_flags |= s->s_header.hi_flags; + clrbitmap(h->h_mflags); + *hp = h; +} + /* +** HVALUE -- return value of a header. +** +** Only "real" fields (i.e., ones that have not been supplied +** as a default) are used. +** +** Parameters: +** field -- the field name. +** header -- the header list. +** +** Returns: +** pointer to the value part. +** NULL if not found. +** +** Side Effects: +** none. +*/ + +char * +hvalue(field, header) + char *field; + HDR *header; +{ + register HDR *h; + + for (h = header; h != NULL; h = h->h_link) + { + if (!bitset(H_DEFAULT, h->h_flags) && + strcasecmp(h->h_field, field) == 0) + return (h->h_value); + } + return (NULL); +} + /* +** ISHEADER -- predicate telling if argument is a header. +** +** A line is a header if it has a single word followed by +** optional white space followed by a colon. +** +** Header fields beginning with two dashes, although technically +** permitted by RFC822, are automatically rejected in order +** to make MIME work out. Without this we could have a technically +** legal header such as ``--"foo:bar"'' that would also be a legal +** MIME separator. +** +** Parameters: +** h -- string to check for possible headerness. +** +** Returns: +** TRUE if h is a header. +** FALSE otherwise. +** +** Side Effects: +** none. +*/ + +bool +isheader(h) + char *h; +{ + register char *s = h; + + if (s[0] == '-' && s[1] == '-') + return FALSE; + + while (*s > ' ' && *s != ':' && *s != '\0') + s++; + + if (h == s) + return FALSE; + + /* following technically violates RFC822 */ + while (isascii(*s) && isspace(*s)) + s++; + + return (*s == ':'); +} + /* +** EATHEADER -- run through the stored header and extract info. +** +** Parameters: +** e -- the envelope to process. +** full -- if set, do full processing (e.g., compute +** message priority). This should not be set +** when reading a queue file because some info +** needed to compute the priority is wrong. +** +** Returns: +** none. +** +** Side Effects: +** Sets a bunch of global variables from information +** in the collected header. +** Aborts the message if the hop count is exceeded. +*/ + +void +eatheader(e, full) + register ENVELOPE *e; + bool full; +{ + register HDR *h; + register char *p; + int hopcnt = 0; + char *msgid; + char buf[MAXLINE]; + extern int priencode __P((char *)); + + /* + ** Set up macros for possible expansion in headers. + */ + + define('f', e->e_sender, e); + define('g', e->e_sender, e); + if (e->e_origrcpt != NULL && *e->e_origrcpt != '\0') + define('u', e->e_origrcpt, e); + else + define('u', NULL, e); + + /* full name of from person */ + p = hvalue("full-name", e->e_header); + if (p != NULL) + define('x', p, e); + + if (tTd(32, 1)) + printf("----- collected header -----\n"); + msgid = NULL; + for (h = e->e_header; h != NULL; h = h->h_link) + { + if (tTd(32, 1)) + printf("%s: ", h->h_field); + if (h->h_value == NULL) + { + if (tTd(32, 1)) + printf("<NULL>\n"); + continue; + } + + /* do early binding */ + if (bitset(H_DEFAULT, h->h_flags)) + { + if (tTd(32, 1)) + { + printf("("); + xputs(h->h_value); + printf(") "); + } + expand(h->h_value, buf, sizeof buf, e); + if (buf[0] != '\0') + { + if (bitset(H_FROM, h->h_flags)) + { + extern char *crackaddr(); + + expand(crackaddr(buf), buf, sizeof buf, e); + } + h->h_value = newstr(buf); + h->h_flags &= ~H_DEFAULT; + } + } + + if (tTd(32, 1)) + { + xputs(h->h_value); + printf("\n"); + } + + /* count the number of times it has been processed */ + if (bitset(H_TRACE, h->h_flags)) + hopcnt++; + + /* send to this person if we so desire */ + if (GrabTo && bitset(H_RCPT, h->h_flags) && + !bitset(H_DEFAULT, h->h_flags) && + (!bitset(EF_RESENT, e->e_flags) || bitset(H_RESENT, h->h_flags))) + { + int saveflags = e->e_flags; + + (void) sendtolist(h->h_value, NULLADDR, + &e->e_sendqueue, 0, e); + +#if 0 + /* + ** Change functionality so a fatal error on an + ** address doesn't affect the entire envelope. + */ + + /* delete fatal errors generated by this address */ + if (!bitset(EF_FATALERRS, saveflags)) + e->e_flags &= ~EF_FATALERRS; +#endif + } + + /* save the message-id for logging */ + p = "resent-message-id"; + if (!bitset(EF_RESENT, e->e_flags)) + p += 7; + if (strcasecmp(h->h_field, p) == 0) + { + msgid = h->h_value; + while (isascii(*msgid) && isspace(*msgid)) + msgid++; + } + } + if (tTd(32, 1)) + printf("----------------------------\n"); + + /* if we are just verifying (that is, sendmail -t -bv), drop out now */ + if (OpMode == MD_VERIFY) + return; + + /* store hop count */ + if (hopcnt > e->e_hopcount) + e->e_hopcount = hopcnt; + + /* message priority */ + p = hvalue("precedence", e->e_header); + if (p != NULL) + e->e_class = priencode(p); + if (e->e_class < 0) + e->e_timeoutclass = TOC_NONURGENT; + else if (e->e_class > 0) + e->e_timeoutclass = TOC_URGENT; + if (full) + { + e->e_msgpriority = e->e_msgsize + - e->e_class * WkClassFact + + e->e_nrcpts * WkRecipFact; + } + + /* message timeout priority */ + p = hvalue("priority", e->e_header); + if (p != NULL) + { + /* (this should be in the configuration file) */ + if (strcasecmp(p, "urgent") == 0) + e->e_timeoutclass = TOC_URGENT; + else if (strcasecmp(p, "normal") == 0) + e->e_timeoutclass = TOC_NORMAL; + else if (strcasecmp(p, "non-urgent") == 0) + e->e_timeoutclass = TOC_NONURGENT; + } + + /* date message originated */ + p = hvalue("posted-date", e->e_header); + if (p == NULL) + p = hvalue("date", e->e_header); + if (p != NULL) + define('a', p, e); + + /* check to see if this is a MIME message */ + if ((e->e_bodytype != NULL && + strcasecmp(e->e_bodytype, "8BITMIME") == 0) || + hvalue("MIME-Version", e->e_header) != NULL) + { + e->e_flags |= EF_IS_MIME; + if (HasEightBits) + e->e_bodytype = "8BITMIME"; + } + else if ((p = hvalue("Content-Type", e->e_header)) != NULL) + { + /* this may be an RFC 1049 message */ + p = strpbrk(p, ";/"); + if (p == NULL || *p == ';') + { + /* yep, it is */ + e->e_flags |= EF_DONT_MIME; + } + } + + /* + ** From person in antiquated ARPANET mode + ** required by UK Grey Book e-mail gateways (sigh) + */ + + if (OpMode == MD_ARPAFTP) + { + register struct hdrinfo *hi; + + for (hi = HdrInfo; hi->hi_field != NULL; hi++) + { + if (bitset(H_FROM, hi->hi_flags) && + (!bitset(H_RESENT, hi->hi_flags) || + bitset(EF_RESENT, e->e_flags)) && + (p = hvalue(hi->hi_field, e->e_header)) != NULL) + break; + } + if (hi->hi_field != NULL) + { + if (tTd(32, 2)) + printf("eatheader: setsender(*%s == %s)\n", + hi->hi_field, p); + setsender(p, e, NULL, '\0', TRUE); + } + } + + /* + ** Log collection information. + */ + + if (bitset(EF_LOGSENDER, e->e_flags) && LogLevel > 4) + logsender(e, msgid); + e->e_flags &= ~EF_LOGSENDER; +} + /* +** LOGSENDER -- log sender information +** +** Parameters: +** e -- the envelope to log +** msgid -- the message id +** +** Returns: +** none +*/ + +void +logsender(e, msgid) + register ENVELOPE *e; + char *msgid; +{ + char *name; + register char *sbp; + register char *p; + int l; + char hbuf[MAXNAME + 1]; + char sbuf[MAXLINE + 1]; + char mbuf[MAXNAME + 1]; + + /* don't allow newlines in the message-id */ + if (msgid != NULL) + { + l = strlen(msgid); + if (l > sizeof mbuf - 1) + l = sizeof mbuf - 1; + bcopy(msgid, mbuf, l); + mbuf[l] = '\0'; + p = mbuf; + while ((p = strchr(p, '\n')) != NULL) + *p++ = ' '; + } + + if (bitset(EF_RESPONSE, e->e_flags)) + name = "[RESPONSE]"; + else if ((name = macvalue('_', e)) != NULL) + ; + else if (RealHostName == NULL) + name = "localhost"; + else if (RealHostName[0] == '[') + name = RealHostName; + else + { + name = hbuf; + (void) snprintf(hbuf, sizeof hbuf, "%.80s", RealHostName); + if (RealHostAddr.sa.sa_family != 0) + { + p = &hbuf[strlen(hbuf)]; + (void) snprintf(p, SPACELEFT(hbuf, p), " (%.100s)", + anynet_ntoa(&RealHostAddr)); + } + } + + /* some versions of syslog only take 5 printf args */ +# if (SYSLOG_BUFSIZE) >= 256 + sbp = sbuf; + snprintf(sbp, SPACELEFT(sbuf, sbp), + "from=%.200s, size=%ld, class=%d, pri=%ld, nrcpts=%d", + e->e_from.q_paddr == NULL ? "<NONE>" : e->e_from.q_paddr, + e->e_msgsize, e->e_class, e->e_msgpriority, e->e_nrcpts); + sbp += strlen(sbp); + if (msgid != NULL) + { + snprintf(sbp, SPACELEFT(sbuf, sbp), ", msgid=%.100s", mbuf); + sbp += strlen(sbp); + } + if (e->e_bodytype != NULL) + { + (void) snprintf(sbp, SPACELEFT(sbuf, sbp), ", bodytype=%.20s", + e->e_bodytype); + sbp += strlen(sbp); + } + p = macvalue('r', e); + if (p != NULL) + (void) snprintf(sbp, SPACELEFT(sbuf, sbp), ", proto=%.20s", p); + sm_syslog(LOG_INFO, e->e_id, + "%.850s, relay=%.100s", + sbuf, name); + +# else /* short syslog buffer */ + + sm_syslog(LOG_INFO, e->e_id, + "from=%s", + e->e_from.q_paddr == NULL ? "<NONE>" + : shortenstring(e->e_from.q_paddr, 83)); + sm_syslog(LOG_INFO, e->e_id, + "size=%ld, class=%ld, pri=%ld, nrcpts=%d", + e->e_msgsize, e->e_class, e->e_msgpriority, e->e_nrcpts); + if (msgid != NULL) + sm_syslog(LOG_INFO, e->e_id, + "msgid=%s", + shortenstring(mbuf, 83)); + sbp = sbuf; + *sbp = '\0'; + if (e->e_bodytype != NULL) + { + snprintf(sbp, SPACELEFT(sbuf, sbp), "bodytype=%.20s, ", e->e_bodytype); + sbp += strlen(sbp); + } + p = macvalue('r', e); + if (p != NULL) + { + snprintf(sbp, SPACELEFT(sbuf, sbp), "proto=%.20s, ", p); + sbp += strlen(sbp); + } + sm_syslog(LOG_INFO, e->e_id, + "%.400srelay=%.100s", sbuf, name); +# endif +} + /* +** PRIENCODE -- encode external priority names into internal values. +** +** Parameters: +** p -- priority in ascii. +** +** Returns: +** priority as a numeric level. +** +** Side Effects: +** none. +*/ + +int +priencode(p) + char *p; +{ + register int i; + + for (i = 0; i < NumPriorities; i++) + { + if (!strcasecmp(p, Priorities[i].pri_name)) + return (Priorities[i].pri_val); + } + + /* unknown priority */ + return (0); +} + /* +** CRACKADDR -- parse an address and turn it into a macro +** +** This doesn't actually parse the address -- it just extracts +** it and replaces it with "$g". The parse is totally ad hoc +** and isn't even guaranteed to leave something syntactically +** identical to what it started with. However, it does leave +** something semantically identical. +** +** This algorithm has been cleaned up to handle a wider range +** of cases -- notably quoted and backslash escaped strings. +** This modification makes it substantially better at preserving +** the original syntax. +** +** Parameters: +** addr -- the address to be cracked. +** +** Returns: +** a pointer to the new version. +** +** Side Effects: +** none. +** +** Warning: +** The return value is saved in local storage and should +** be copied if it is to be reused. +*/ + +char * +crackaddr(addr) + register char *addr; +{ + register char *p; + register char c; + int cmtlev; + int realcmtlev; + int anglelev, realanglelev; + int copylev; + int bracklev; + bool qmode; + bool realqmode; + bool skipping; + bool putgmac = FALSE; + bool quoteit = FALSE; + bool gotangle = FALSE; + bool gotcolon = FALSE; + register char *bp; + char *buflim; + char *bufhead; + char *addrhead; + static char buf[MAXNAME + 1]; + + if (tTd(33, 1)) + printf("crackaddr(%s)\n", addr); + + /* strip leading spaces */ + while (*addr != '\0' && isascii(*addr) && isspace(*addr)) + addr++; + + /* + ** Start by assuming we have no angle brackets. This will be + ** adjusted later if we find them. + */ + + bp = bufhead = buf; + buflim = &buf[sizeof buf - 7]; + p = addrhead = addr; + copylev = anglelev = realanglelev = cmtlev = realcmtlev = 0; + bracklev = 0; + qmode = realqmode = FALSE; + + while ((c = *p++) != '\0') + { + /* + ** If the buffer is overful, go into a special "skipping" + ** mode that tries to keep legal syntax but doesn't actually + ** output things. + */ + + skipping = bp >= buflim; + + if (copylev > 0 && !skipping) + *bp++ = c; + + /* check for backslash escapes */ + if (c == '\\') + { + /* arrange to quote the address */ + if (cmtlev <= 0 && !qmode) + quoteit = TRUE; + + if ((c = *p++) == '\0') + { + /* too far */ + p--; + goto putg; + } + if (copylev > 0 && !skipping) + *bp++ = c; + goto putg; + } + + /* check for quoted strings */ + if (c == '"' && cmtlev <= 0) + { + qmode = !qmode; + if (copylev > 0 && !skipping) + realqmode = !realqmode; + continue; + } + if (qmode) + goto putg; + + /* check for comments */ + if (c == '(') + { + cmtlev++; + + /* allow space for closing paren */ + if (!skipping) + { + buflim--; + realcmtlev++; + if (copylev++ <= 0) + { + if (bp != bufhead) + *bp++ = ' '; + *bp++ = c; + } + } + } + if (cmtlev > 0) + { + if (c == ')') + { + cmtlev--; + copylev--; + if (!skipping) + { + realcmtlev--; + buflim++; + } + } + continue; + } + else if (c == ')') + { + /* syntax error: unmatched ) */ + if (copylev > 0 && !skipping) + bp--; + } + + /* count nesting on [ ... ] (for IPv6 domain literals) */ + if (c == '[') + bracklev++; + else if (c == ']') + bracklev--; + + /* check for group: list; syntax */ + if (c == ':' && anglelev <= 0 && bracklev <= 0 && + !gotcolon && !ColonOkInAddr) + { + register char *q; + + /* + ** Check for DECnet phase IV ``::'' (host::user) + ** or ** DECnet phase V ``:.'' syntaxes. The latter + ** covers ``user@DEC:.tay.myhost'' and + ** ``DEC:.tay.myhost::user'' syntaxes (bletch). + */ + + if (*p == ':' || *p == '.') + { + if (cmtlev <= 0 && !qmode) + quoteit = TRUE; + if (copylev > 0 && !skipping) + { + *bp++ = c; + *bp++ = *p; + } + p++; + goto putg; + } + + gotcolon = TRUE; + + bp = bufhead; + if (quoteit) + { + *bp++ = '"'; + + /* back up over the ':' and any spaces */ + --p; + while (isascii(*--p) && isspace(*p)) + continue; + p++; + } + for (q = addrhead; q < p; ) + { + c = *q++; + if (bp < buflim) + { + if (quoteit && c == '"') + *bp++ = '\\'; + *bp++ = c; + } + } + if (quoteit) + { + if (bp == &bufhead[1]) + bp--; + else + *bp++ = '"'; + while ((c = *p++) != ':') + { + if (bp < buflim) + *bp++ = c; + } + *bp++ = c; + } + + /* any trailing white space is part of group: */ + while (isascii(*p) && isspace(*p) && bp < buflim) + *bp++ = *p++; + copylev = 0; + putgmac = quoteit = FALSE; + bufhead = bp; + addrhead = p; + continue; + } + + if (c == ';' && copylev <= 0 && !ColonOkInAddr) + { + if (bp < buflim) + *bp++ = c; + } + + /* check for characters that may have to be quoted */ + if (strchr(MustQuoteChars, c) != NULL) + { + /* + ** If these occur as the phrase part of a <> + ** construct, but are not inside of () or already + ** quoted, they will have to be quoted. Note that + ** now (but don't actually do the quoting). + */ + + if (cmtlev <= 0 && !qmode) + quoteit = TRUE; + } + + /* check for angle brackets */ + if (c == '<') + { + register char *q; + + /* assume first of two angles is bogus */ + if (gotangle) + quoteit = TRUE; + gotangle = TRUE; + + /* oops -- have to change our mind */ + anglelev = 1; + if (!skipping) + realanglelev = 1; + + bp = bufhead; + if (quoteit) + { + *bp++ = '"'; + + /* back up over the '<' and any spaces */ + --p; + while (isascii(*--p) && isspace(*p)) + continue; + p++; + } + for (q = addrhead; q < p; ) + { + c = *q++; + if (bp < buflim) + { + if (quoteit && c == '"') + *bp++ = '\\'; + *bp++ = c; + } + } + if (quoteit) + { + if (bp == &buf[1]) + bp--; + else + *bp++ = '"'; + while ((c = *p++) != '<') + { + if (bp < buflim) + *bp++ = c; + } + *bp++ = c; + } + copylev = 0; + putgmac = quoteit = FALSE; + continue; + } + + if (c == '>') + { + if (anglelev > 0) + { + anglelev--; + if (!skipping) + { + realanglelev--; + buflim++; + } + } + else if (!skipping) + { + /* syntax error: unmatched > */ + if (copylev > 0) + bp--; + quoteit = TRUE; + continue; + } + if (copylev++ <= 0) + *bp++ = c; + continue; + } + + /* must be a real address character */ + putg: + if (copylev <= 0 && !putgmac) + { + if (bp > bufhead && bp[-1] == ')') + *bp++ = ' '; + *bp++ = MACROEXPAND; + *bp++ = 'g'; + putgmac = TRUE; + } + } + + /* repair any syntactic damage */ + if (realqmode) + *bp++ = '"'; + while (realcmtlev-- > 0) + *bp++ = ')'; + while (realanglelev-- > 0) + *bp++ = '>'; + *bp++ = '\0'; + + if (tTd(33, 1)) + { + printf("crackaddr=>`"); + xputs(buf); + printf("'\n"); + } + + return (buf); +} + /* +** PUTHEADER -- put the header part of a message from the in-core copy +** +** Parameters: +** mci -- the connection information. +** h -- the header to put. +** e -- envelope to use. +** +** Returns: +** none. +** +** Side Effects: +** none. +*/ + +/* + * Macro for fast max (not available in e.g. DG/UX, 386/ix). + */ +#ifndef MAX +# define MAX(a,b) (((a)>(b))?(a):(b)) +#endif + +void +putheader(mci, hdr, e) + register MCI *mci; + HDR *hdr; + register ENVELOPE *e; +{ + register HDR *h; + char buf[MAX(MAXLINE,BUFSIZ)]; + char obuf[MAXLINE]; + + if (tTd(34, 1)) + printf("--- putheader, mailer = %s ---\n", + mci->mci_mailer->m_name); + + mci->mci_flags |= MCIF_INHEADER; + for (h = hdr; h != NULL; h = h->h_link) + { + register char *p = h->h_value; + extern bool bitintersect(); + + if (tTd(34, 11)) + { + printf(" %s: ", h->h_field); + xputs(p); + } + + /* suppress Content-Transfer-Encoding: if we are MIMEing */ + if (bitset(H_CTE, h->h_flags) && + bitset(MCIF_CVT8TO7|MCIF_CVT7TO8|MCIF_INMIME, mci->mci_flags)) + { + if (tTd(34, 11)) + printf(" (skipped (content-transfer-encoding))\n"); + continue; + } + + if (bitset(MCIF_INMIME, mci->mci_flags)) + { + if (tTd(34, 11)) + printf("\n"); + put_vanilla_header(h, p, mci); + continue; + } + + if (bitset(H_CHECK|H_ACHECK, h->h_flags) && + !bitintersect(h->h_mflags, mci->mci_mailer->m_flags)) + { + if (tTd(34, 11)) + printf(" (skipped)\n"); + continue; + } + + /* handle Resent-... headers specially */ + if (bitset(H_RESENT, h->h_flags) && !bitset(EF_RESENT, e->e_flags)) + { + if (tTd(34, 11)) + printf(" (skipped (resent))\n"); + continue; + } + + /* suppress return receipts if requested */ + if (bitset(H_RECEIPTTO, h->h_flags) && +#if _FFR_DSN_RRT_OPTION + (RrtImpliesDsn || bitset(EF_NORECEIPT, e->e_flags))) +#else + bitset(EF_NORECEIPT, e->e_flags)) +#endif + { + if (tTd(34, 11)) + printf(" (skipped (receipt))\n"); + continue; + } + + /* macro expand value if generated internally */ + if (bitset(H_DEFAULT, h->h_flags)) + { + expand(p, buf, sizeof buf, e); + p = buf; + if (*p == '\0') + { + if (tTd(34, 11)) + printf(" (skipped -- null value)\n"); + continue; + } + } + + if (bitset(H_BCC, h->h_flags)) + { + /* Bcc: field -- either truncate or delete */ + if (bitset(EF_DELETE_BCC, e->e_flags)) + { + if (tTd(34, 11)) + printf(" (skipped -- bcc)\n"); + } + else + { + /* no other recipient headers: truncate value */ + (void) snprintf(obuf, sizeof obuf, "%s:", + h->h_field); + putline(obuf, mci); + } + continue; + } + + if (tTd(34, 11)) + printf("\n"); + + if (bitset(H_FROM|H_RCPT, h->h_flags)) + { + /* address field */ + bool oldstyle = bitset(EF_OLDSTYLE, e->e_flags); + + if (bitset(H_FROM, h->h_flags)) + oldstyle = FALSE; + commaize(h, p, oldstyle, mci, e); + } + else + { + put_vanilla_header(h, p, mci); + } + } + + /* + ** If we are converting this to a MIME message, add the + ** MIME headers. + */ + +#if MIME8TO7 + if (bitset(MM_MIME8BIT, MimeMode) && + bitset(EF_HAS8BIT, e->e_flags) && + !bitset(EF_DONT_MIME, e->e_flags) && + !bitnset(M_8BITS, mci->mci_mailer->m_flags) && + !bitset(MCIF_CVT8TO7|MCIF_CVT7TO8, mci->mci_flags)) + { + if (hvalue("MIME-Version", e->e_header) == NULL) + putline("MIME-Version: 1.0", mci); + if (hvalue("Content-Type", e->e_header) == NULL) + { + snprintf(obuf, sizeof obuf, + "Content-Type: text/plain; charset=%s", + defcharset(e)); + putline(obuf, mci); + } + if (hvalue("Content-Transfer-Encoding", e->e_header) == NULL) + putline("Content-Transfer-Encoding: 8bit", mci); + } +#endif +} + /* +** PUT_VANILLA_HEADER -- output a fairly ordinary header +** +** Parameters: +** h -- the structure describing this header +** v -- the value of this header +** mci -- the connection info for output +** +** Returns: +** none. +*/ + +void +put_vanilla_header(h, v, mci) + HDR *h; + char *v; + MCI *mci; +{ + register char *nlp; + register char *obp; + int putflags; + char obuf[MAXLINE]; + + putflags = PXLF_HEADER; +#if _FFR_7BITHDRS + if (bitnset(M_7BITHDRS, mci->mci_mailer->m_flags)) + putflags |= PXLF_STRIP8BIT; +#endif + (void) snprintf(obuf, sizeof obuf, "%.200s: ", h->h_field); + obp = obuf + strlen(obuf); + while ((nlp = strchr(v, '\n')) != NULL) + { + int l; + + l = nlp - v; + if (SPACELEFT(obuf, obp) - 1 < l) + l = SPACELEFT(obuf, obp) - 1; + + snprintf(obp, SPACELEFT(obuf, obp), "%.*s", l, v); + putxline(obuf, strlen(obuf), mci, putflags); + v += l + 1; + obp = obuf; + if (*v != ' ' && *v != '\t') + *obp++ = ' '; + } + snprintf(obp, SPACELEFT(obuf, obp), "%.*s", + sizeof obuf - (obp - obuf) - 1, v); + putxline(obuf, strlen(obuf), mci, putflags); +} + /* +** COMMAIZE -- output a header field, making a comma-translated list. +** +** Parameters: +** h -- the header field to output. +** p -- the value to put in it. +** oldstyle -- TRUE if this is an old style header. +** mci -- the connection information. +** e -- the envelope containing the message. +** +** Returns: +** none. +** +** Side Effects: +** outputs "p" to file "fp". +*/ + +void +commaize(h, p, oldstyle, mci, e) + register HDR *h; + register char *p; + bool oldstyle; + register MCI *mci; + register ENVELOPE *e; +{ + register char *obp; + int opos; + int omax; + bool firstone = TRUE; + int putflags = PXLF_HEADER; + char obuf[MAXLINE + 3]; + + /* + ** Output the address list translated by the + ** mailer and with commas. + */ + + if (tTd(14, 2)) + printf("commaize(%s: %s)\n", h->h_field, p); + +#if _FFR_7BITHDRS + if (bitnset(M_7BITHDRS, mci->mci_mailer->m_flags)) + putflags |= PXLF_STRIP8BIT; +#endif + + obp = obuf; + (void) snprintf(obp, SPACELEFT(obuf, obp), "%.200s: ", h->h_field); + opos = strlen(h->h_field) + 2; + if (opos > 202) + opos = 202; + obp += opos; + omax = mci->mci_mailer->m_linelimit - 2; + if (omax < 0 || omax > 78) + omax = 78; + + /* + ** Run through the list of values. + */ + + while (*p != '\0') + { + register char *name; + register int c; + char savechar; + int flags; + auto int stat; + + /* + ** Find the end of the name. New style names + ** end with a comma, old style names end with + ** a space character. However, spaces do not + ** necessarily delimit an old-style name -- at + ** signs mean keep going. + */ + + /* find end of name */ + while ((isascii(*p) && isspace(*p)) || *p == ',') + p++; + name = p; + for (;;) + { + auto char *oldp; + char pvpbuf[PSBUFSIZE]; + + (void) prescan(p, oldstyle ? ' ' : ',', pvpbuf, + sizeof pvpbuf, &oldp, NULL); + p = oldp; + + /* look to see if we have an at sign */ + while (*p != '\0' && isascii(*p) && isspace(*p)) + p++; + + if (*p != '@') + { + p = oldp; + break; + } + p += *p == '@' ? 1 : 2; + while (*p != '\0' && isascii(*p) && isspace(*p)) + p++; + } + /* at the end of one complete name */ + + /* strip off trailing white space */ + while (p >= name && + ((isascii(*p) && isspace(*p)) || *p == ',' || *p == '\0')) + p--; + if (++p == name) + continue; + savechar = *p; + *p = '\0'; + + /* translate the name to be relative */ + flags = RF_HEADERADDR|RF_ADDDOMAIN; + if (bitset(H_FROM, h->h_flags)) + flags |= RF_SENDERADDR; +#if USERDB + else if (e->e_from.q_mailer != NULL && + bitnset(M_UDBRECIPIENT, e->e_from.q_mailer->m_flags)) + { + extern char *udbsender(); + char *q; + + q = udbsender(name); + if (q != NULL) + name = q; + } +#endif + stat = EX_OK; + name = remotename(name, mci->mci_mailer, flags, &stat, e); + if (*name == '\0') + { + *p = savechar; + continue; + } + name = denlstring(name, FALSE, TRUE); + + /* output the name with nice formatting */ + opos += strlen(name); + if (!firstone) + opos += 2; + if (opos > omax && !firstone) + { + snprintf(obp, SPACELEFT(obuf, obp), ",\n"); + putxline(obuf, strlen(obuf), mci, putflags); + obp = obuf; + (void) strcpy(obp, " "); + opos = strlen(obp); + obp += opos; + opos += strlen(name); + } + else if (!firstone) + { + snprintf(obp, SPACELEFT(obuf, obp), ", "); + obp += 2; + } + + while ((c = *name++) != '\0' && obp < &obuf[MAXLINE]) + *obp++ = c; + firstone = FALSE; + *p = savechar; + } + *obp = '\0'; + putxline(obuf, strlen(obuf), mci, putflags); +} + /* +** COPYHEADER -- copy header list +** +** This routine is the equivalent of newstr for header lists +** +** Parameters: +** header -- list of header structures to copy. +** +** Returns: +** a copy of 'header'. +** +** Side Effects: +** none. +*/ + +HDR * +copyheader(header) + register HDR *header; +{ + register HDR *newhdr; + HDR *ret; + register HDR **tail = &ret; + + while (header != NULL) + { + newhdr = (HDR *) xalloc(sizeof(HDR)); + STRUCTCOPY(*header, *newhdr); + *tail = newhdr; + tail = &newhdr->h_link; + header = header->h_link; + } + *tail = NULL; + + return ret; +} |