diff options
Diffstat (limited to 'src/headers.c')
| -rw-r--r-- | src/headers.c | 1710 |
1 files changed, 0 insertions, 1710 deletions
diff --git a/src/headers.c b/src/headers.c deleted file mode 100644 index 6c43dcb..0000000 --- a/src/headers.c +++ /dev/null @@ -1,1710 +0,0 @@ -/* - * Copyright (c) 1998 Sendmail, Inc. All rights reserved. - * Copyright (c) 1983, 1995-1997 Eric P. Allman. All rights reserved. - * Copyright (c) 1988, 1993 - * The Regents of the University of California. All rights reserved. - * - * By using this file, you agree to the terms and conditions set - * forth in the LICENSE file which can be found at the top level of - * the sendmail distribution. - * - */ - -#ifndef lint -static char sccsid[] = "@(#)headers.c 8.136 (Berkeley) 1/26/1999"; -#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; - bool nullheader = FALSE; - 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'; - - /* strip field value on front */ - if (*p == ' ') - p++; - fvalue = p; - - /* if the field is null, go ahead and use the default */ - while (isascii(*p) && isspace(*p)) - p++; - if (*p == '\0') - nullheader = TRUE; - - /* security scan: long field names are end-of-header */ - if (strlen(fname) > 100) - return H_EOH; - - /* 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; - } - } - - /* 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 (!headeronly && 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)) - { - if (nullheader) - { - /* user-supplied value was null */ - return 0; - } - 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; - - /* strip EOH flag if parsing MIME headers */ - if (headeronly) - h->h_flags &= ~H_EOH; - 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) - { - extern bool rfc822_string __P((char *)); - - if (!rfc822_string(p)) - { - extern char *addquotes __P((char *)); - - /* - ** Quote a full name with special characters - ** as a comment so crackaddr() doesn't destroy - ** the name portion of the address. - */ - p = addquotes(p); - } - 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 __P((char *)); - - 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))) - { -#if 0 - int saveflags = e->e_flags; -#endif - - (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. -** flags -- MIME conversion flags. -** -** 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, flags) - register MCI *mci; - HDR *hdr; - register ENVELOPE *e; - int flags; -{ - 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); - - /* - ** If we're in MIME mode, we're not really in the header of the - ** message, just the header of one of the parts of the body of - ** the message. Therefore MCIF_INHEADER should not be turned on. - */ - - if (!bitset(MCIF_INMIME, mci->mci_flags)) - mci->mci_flags |= MCIF_INHEADER; - - for (h = hdr; h != NULL; h = h->h_link) - { - register char *p = h->h_value; - extern bool bitintersect __P((BITMAP, BITMAP)); - - if (tTd(34, 11)) - { - printf(" %s: ", h->h_field); - xputs(p); - } - -#if _FFR_MAX_MIME_HEADER_LENGTH - /* heuristic shortening of MIME fields to avoid MUA overflows */ - if (MaxMimeFieldLength > 0 && - wordinclass(h->h_field, - macid("{checkMIMEFieldHeaders}", NULL))) - { - extern bool fix_mime_header __P((char *)); - - if (fix_mime_header(h->h_value)) - { - sm_syslog(LOG_ALERT, e->e_id, - "Truncated MIME %s header due to field size (possible attack)", - h->h_field); - if (tTd(34, 11)) - printf(" truncated MIME %s header due to field size (possible attack)\n", - h->h_field); - } - } - - if (MaxMimeHeaderLength > 0 && - wordinclass(h->h_field, - macid("{checkMIMETextHeaders}", NULL))) - { - if (strlen(h->h_value) > MaxMimeHeaderLength) - { - h->h_value[MaxMimeHeaderLength - 1] = '\0'; - sm_syslog(LOG_ALERT, e->e_id, - "Truncated long MIME %s header (possible attack)", - h->h_field); - if (tTd(34, 11)) - printf(" truncated long MIME %s header (possible attack)\n", - h->h_field); - } - } - - if (MaxMimeHeaderLength > 0 && - wordinclass(h->h_field, - macid("{checkMIMEHeaders}", NULL))) - { - extern bool shorten_rfc822_string __P((char *, int)); - - if (shorten_rfc822_string(h->h_value, MaxMimeHeaderLength)) - { - sm_syslog(LOG_ALERT, e->e_id, - "Truncated long MIME %s header (possible attack)", - h->h_field); - if (tTd(34, 11)) - printf(" truncated long MIME %s header (possible attack)\n", - h->h_field); - } - } -#endif - - /* - ** Suppress Content-Transfer-Encoding: if we are MIMEing - ** and we are potentially converting from 8 bit to 7 bit - ** MIME. If converting, add a new CTE header in - ** mime8to7(). - */ - if (bitset(H_CTE, h->h_flags) && - bitset(MCIF_CVT8TO7|MCIF_CVT7TO8|MCIF_INMIME, - mci->mci_flags) && - !bitset(M87F_NO8TO7, 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 __P((char *)); - 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; -} - /* -** FIX_MIME_HEADER -- possibly truncate/rebalance parameters in a MIME header -** -** Run through all of the parameters of a MIME header and -** possibly truncate and rebalance the parameter according -** to MaxMimeFieldLength. -** -** Parameters: -** string -- the full header -** -** Returns: -** TRUE if the header was modified, FALSE otherwise -** -** Side Effects: -** string modified in place -*/ - -bool -fix_mime_header(string) - char *string; -{ - bool modified = FALSE; - char *begin = string; - char *end; - extern char *find_character __P((char *, char)); - extern bool shorten_rfc822_string __P((char *, int)); - - if (string == NULL || *string == '\0') - return FALSE; - - /* Split on each ';' */ - while ((end = find_character(begin, ';')) != NULL) - { - char save = *end; - char *bp; - - *end = '\0'; - - /* Shorten individual parameter */ - if (shorten_rfc822_string(begin, MaxMimeFieldLength)) - modified = TRUE; - - /* Collapse the possibly shortened string with rest */ - bp = begin + strlen(begin); - if (bp != end) - { - char *ep = end; - - *end = save; - end = bp; - - /* copy character by character due to overlap */ - while (*ep != '\0') - *bp++ = *ep++; - *bp = '\0'; - } - else - *end = save; - if (*end == '\0') - break; - - /* Move past ';' */ - begin = end + 1; - } - return modified; -} |