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- /*
- * Copyright (c) 1983 Eric P. Allman
- * Copyright (c) 1988 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[] = "@(#)parseaddr.c 5.13 (Berkeley) 6/1/90";
- #endif /* not lint */
-
- # include "sendmail.h"
-
- /*
- ** PARSEADDR -- Parse an address
- **
- ** Parses an address and breaks it up into three parts: a
- ** net to transmit the message on, the host to transmit it
- ** to, and a user on that host. These are loaded into an
- ** ADDRESS header with the values squirreled away if necessary.
- ** The "user" part may not be a real user; the process may
- ** just reoccur on that machine. For example, on a machine
- ** with an arpanet connection, the address
- ** csvax.bill@berkeley
- ** will break up to a "user" of 'csvax.bill' and a host
- ** of 'berkeley' -- to be transmitted over the arpanet.
- **
- ** Parameters:
- ** addr -- the address to parse.
- ** a -- a pointer to the address descriptor buffer.
- ** If NULL, a header will be created.
- ** copyf -- determines what shall be copied:
- ** -1 -- don't copy anything. The printname
- ** (q_paddr) is just addr, and the
- ** user & host are allocated internally
- ** to parse.
- ** 0 -- copy out the parsed user & host, but
- ** don't copy the printname.
- ** +1 -- copy everything.
- ** delim -- the character to terminate the address, passed
- ** to prescan.
- **
- ** Returns:
- ** A pointer to the address descriptor header (`a' if
- ** `a' is non-NULL).
- ** NULL on error.
- **
- ** Side Effects:
- ** none
- */
-
- /* following delimiters are inherent to the internal algorithms */
- # define DELIMCHARS "\001()<>,;\\\"\r\n" /* word delimiters */
-
- ADDRESS *
- parseaddr(addr, a, copyf, delim)
- char *addr;
- register ADDRESS *a;
- int copyf;
- char delim;
- {
- register char **pvp;
- register struct mailer *m;
- char pvpbuf[PSBUFSIZE];
- extern char **prescan();
- extern ADDRESS *buildaddr();
-
- /*
- ** Initialize and prescan address.
- */
-
- CurEnv->e_to = addr;
- if (tTd(20, 1))
- printf("\n--parseaddr(%s)\n", addr);
-
- pvp = prescan(addr, delim, pvpbuf);
- if (pvp == NULL)
- return (NULL);
-
- /*
- ** Apply rewriting rules.
- ** Ruleset 0 does basic parsing. It must resolve.
- */
-
- rewrite(pvp, 3);
- rewrite(pvp, 0);
-
- /*
- ** See if we resolved to a real mailer.
- */
-
- if (pvp[0][0] != CANONNET)
- {
- setstat(EX_USAGE);
- usrerr("cannot resolve name");
- return (NULL);
- }
-
- /*
- ** Build canonical address from pvp.
- */
-
- a = buildaddr(pvp, a);
- if (a == NULL)
- return (NULL);
- m = a->q_mailer;
-
- /*
- ** Make local copies of the host & user and then
- ** transport them out.
- */
-
- if (copyf > 0)
- {
- extern char *DelimChar;
- char savec = *DelimChar;
-
- *DelimChar = '\0';
- a->q_paddr = newstr(addr);
- *DelimChar = savec;
- }
- else
- a->q_paddr = addr;
-
- if (a->q_user == NULL)
- a->q_user = "";
- if (a->q_host == NULL)
- a->q_host = "";
-
- if (copyf >= 0)
- {
- a->q_host = newstr(a->q_host);
- if (a->q_user != a->q_paddr)
- a->q_user = newstr(a->q_user);
- }
-
- /*
- ** Convert host name to lower case if requested.
- ** User name will be done later.
- */
-
- if (!bitnset(M_HST_UPPER, m->m_flags))
- makelower(a->q_host);
-
- /*
- ** Compute return value.
- */
-
- if (tTd(20, 1))
- {
- printf("parseaddr-->");
- printaddr(a, FALSE);
- }
-
- return (a);
- }
- /*
- ** LOWERADDR -- map UPPER->lower case on addresses as requested.
- **
- ** Parameters:
- ** a -- address to be mapped.
- **
- ** Returns:
- ** none.
- **
- ** Side Effects:
- ** none.
- */
-
- loweraddr(a)
- register ADDRESS *a;
- {
- register MAILER *m = a->q_mailer;
-
- if (!bitnset(M_USR_UPPER, m->m_flags))
- makelower(a->q_user);
- }
- /*
- ** PRESCAN -- Prescan name and make it canonical
- **
- ** Scans a name and turns it into a set of tokens. This process
- ** deletes blanks and comments (in parentheses).
- **
- ** This routine knows about quoted strings and angle brackets.
- **
- ** There are certain subtleties to this routine. The one that
- ** comes to mind now is that backslashes on the ends of names
- ** are silently stripped off; this is intentional. The problem
- ** is that some versions of sndmsg (like at LBL) set the kill
- ** character to something other than @ when reading addresses;
- ** so people type "csvax.eric\@berkeley" -- which screws up the
- ** berknet mailer.
- **
- ** Parameters:
- ** addr -- the name to chomp.
- ** delim -- the delimiter for the address, normally
- ** '\0' or ','; \0 is accepted in any case.
- ** If '\t' then we are reading the .cf file.
- ** pvpbuf -- place to put the saved text -- note that
- ** the pointers are static.
- **
- ** Returns:
- ** A pointer to a vector of tokens.
- ** NULL on error.
- **
- ** Side Effects:
- ** sets DelimChar to point to the character matching 'delim'.
- */
-
- /* states and character types */
- # define OPR 0 /* operator */
- # define ATM 1 /* atom */
- # define QST 2 /* in quoted string */
- # define SPC 3 /* chewing up spaces */
- # define ONE 4 /* pick up one character */
-
- # define NSTATES 5 /* number of states */
- # define TYPE 017 /* mask to select state type */
-
- /* meta bits for table */
- # define M 020 /* meta character; don't pass through */
- # define B 040 /* cause a break */
- # define MB M|B /* meta-break */
-
- static short StateTab[NSTATES][NSTATES] =
- {
- /* oldst chtype> OPR ATM QST SPC ONE */
- /*OPR*/ OPR|B, ATM|B, QST|B, SPC|MB, ONE|B,
- /*ATM*/ OPR|B, ATM, QST|B, SPC|MB, ONE|B,
- /*QST*/ QST, QST, OPR, QST, QST,
- /*SPC*/ OPR, ATM, QST, SPC|M, ONE,
- /*ONE*/ OPR, OPR, OPR, OPR, OPR,
- };
-
- # define NOCHAR -1 /* signal nothing in lookahead token */
-
- char *DelimChar; /* set to point to the delimiter */
-
- char **
- prescan(addr, delim, pvpbuf)
- char *addr;
- char delim;
- char pvpbuf[];
- {
- register char *p;
- register char *q;
- register int c;
- char **avp;
- bool bslashmode;
- int cmntcnt;
- int anglecnt;
- char *tok;
- int state;
- int newstate;
- static char *av[MAXATOM+1];
- extern int errno;
-
- /* make sure error messages don't have garbage on them */
- errno = 0;
-
- q = pvpbuf;
- bslashmode = FALSE;
- cmntcnt = 0;
- anglecnt = 0;
- avp = av;
- state = OPR;
- c = NOCHAR;
- p = addr;
- if (tTd(22, 45))
- {
- printf("prescan: ");
- xputs(p);
- (void) putchar('\n');
- }
-
- do
- {
- /* read a token */
- tok = q;
- for (;;)
- {
- /* store away any old lookahead character */
- if (c != NOCHAR)
- {
- /* see if there is room */
- if (q >= &pvpbuf[PSBUFSIZE - 5])
- {
- usrerr("Address too long");
- DelimChar = p;
- return (NULL);
- }
-
- /* squirrel it away */
- *q++ = c;
- }
-
- /* read a new input character */
- c = *p++;
- if (c == '\0')
- break;
- c &= ~0200;
-
- if (tTd(22, 101))
- printf("c=%c, s=%d; ", c, state);
-
- /* chew up special characters */
- *q = '\0';
- if (bslashmode)
- {
- /* kludge \! for naive users */
- if (c != '!')
- c |= 0200;
- bslashmode = FALSE;
- }
- else if (c == '\\')
- {
- bslashmode = TRUE;
- c = NOCHAR;
- }
- else if (state == QST)
- {
- /* do nothing, just avoid next clauses */
- }
- else if (c == '(')
- {
- cmntcnt++;
- c = NOCHAR;
- }
- else if (c == ')')
- {
- if (cmntcnt <= 0)
- {
- usrerr("Unbalanced ')'");
- DelimChar = p;
- return (NULL);
- }
- else
- cmntcnt--;
- }
- else if (cmntcnt > 0)
- c = NOCHAR;
- else if (c == '<')
- anglecnt++;
- else if (c == '>')
- {
- if (anglecnt <= 0)
- {
- usrerr("Unbalanced '>'");
- DelimChar = p;
- return (NULL);
- }
- anglecnt--;
- }
- else if (delim == ' ' && isspace(c))
- c = ' ';
-
- if (c == NOCHAR)
- continue;
-
- /* see if this is end of input */
- if (c == delim && anglecnt <= 0 && state != QST)
- break;
-
- newstate = StateTab[state][toktype(c)];
- if (tTd(22, 101))
- printf("ns=%02o\n", newstate);
- state = newstate & TYPE;
- if (bitset(M, newstate))
- c = NOCHAR;
- if (bitset(B, newstate))
- break;
- }
-
- /* new token */
- if (tok != q)
- {
- *q++ = '\0';
- if (tTd(22, 36))
- {
- printf("tok=");
- xputs(tok);
- (void) putchar('\n');
- }
- if (avp >= &av[MAXATOM])
- {
- syserr("prescan: too many tokens");
- DelimChar = p;
- return (NULL);
- }
- *avp++ = tok;
- }
- } while (c != '\0' && (c != delim || anglecnt > 0));
- *avp = NULL;
- DelimChar = --p;
- if (cmntcnt > 0)
- usrerr("Unbalanced '('");
- else if (anglecnt > 0)
- usrerr("Unbalanced '<'");
- else if (state == QST)
- usrerr("Unbalanced '\"'");
- else if (av[0] != NULL)
- return (av);
- return (NULL);
- }
- /*
- ** TOKTYPE -- return token type
- **
- ** Parameters:
- ** c -- the character in question.
- **
- ** Returns:
- ** Its type.
- **
- ** Side Effects:
- ** none.
- */
-
- toktype(c)
- register char c;
- {
- static char buf[50];
- static bool firstime = TRUE;
-
- if (firstime)
- {
- firstime = FALSE;
- expand("\001o", buf, &buf[sizeof buf - 1], CurEnv);
- (void) strcat(buf, DELIMCHARS);
- }
- if (c == MATCHCLASS || c == MATCHREPL || c == MATCHNCLASS)
- return (ONE);
- if (c == '"')
- return (QST);
- if (!isascii(c))
- return (ATM);
- if (isspace(c) || c == ')')
- return (SPC);
- if (iscntrl(c) || index(buf, c) != NULL)
- return (OPR);
- return (ATM);
- }
- /*
- ** REWRITE -- apply rewrite rules to token vector.
- **
- ** This routine is an ordered production system. Each rewrite
- ** rule has a LHS (called the pattern) and a RHS (called the
- ** rewrite); 'rwr' points the the current rewrite rule.
- **
- ** For each rewrite rule, 'avp' points the address vector we
- ** are trying to match against, and 'pvp' points to the pattern.
- ** If pvp points to a special match value (MATCHZANY, MATCHANY,
- ** MATCHONE, MATCHCLASS, MATCHNCLASS) then the address in avp
- ** matched is saved away in the match vector (pointed to by 'mvp').
- **
- ** When a match between avp & pvp does not match, we try to
- ** back out. If we back up over MATCHONE, MATCHCLASS, or MATCHNCLASS
- ** we must also back out the match in mvp. If we reach a
- ** MATCHANY or MATCHZANY we just extend the match and start
- ** over again.
- **
- ** When we finally match, we rewrite the address vector
- ** and try over again.
- **
- ** Parameters:
- ** pvp -- pointer to token vector.
- **
- ** Returns:
- ** none.
- **
- ** Side Effects:
- ** pvp is modified.
- */
-
- struct match
- {
- char **first; /* first token matched */
- char **last; /* last token matched */
- };
-
- # define MAXMATCH 9 /* max params per rewrite */
-
-
- rewrite(pvp, ruleset)
- char **pvp;
- int ruleset;
- {
- register char *ap; /* address pointer */
- register char *rp; /* rewrite pointer */
- register char **avp; /* address vector pointer */
- register char **rvp; /* rewrite vector pointer */
- register struct match *mlp; /* cur ptr into mlist */
- register struct rewrite *rwr; /* pointer to current rewrite rule */
- struct match mlist[MAXMATCH]; /* stores match on LHS */
- char *npvp[MAXATOM+1]; /* temporary space for rebuild */
-
- if (OpMode == MD_TEST || tTd(21, 2))
- {
- printf("rewrite: ruleset %2d input:", ruleset);
- printav(pvp);
- }
- if (pvp == NULL)
- return;
-
- /*
- ** Run through the list of rewrite rules, applying
- ** any that match.
- */
-
- for (rwr = RewriteRules[ruleset]; rwr != NULL; )
- {
- if (tTd(21, 12))
- {
- printf("-----trying rule:");
- printav(rwr->r_lhs);
- }
-
- /* try to match on this rule */
- mlp = mlist;
- rvp = rwr->r_lhs;
- avp = pvp;
- while ((ap = *avp) != NULL || *rvp != NULL)
- {
- rp = *rvp;
- if (tTd(21, 35))
- {
- printf("ap=");
- xputs(ap);
- printf(", rp=");
- xputs(rp);
- printf("\n");
- }
- if (rp == NULL)
- {
- /* end-of-pattern before end-of-address */
- goto backup;
- }
- if (ap == NULL && *rp != MATCHZANY)
- {
- /* end-of-input */
- break;
- }
-
- switch (*rp)
- {
- register STAB *s;
-
- case MATCHCLASS:
- case MATCHNCLASS:
- /* match any token in (not in) a class */
- s = stab(ap, ST_CLASS, ST_FIND);
- if (s == NULL || !bitnset(rp[1], s->s_class))
- {
- if (*rp == MATCHCLASS)
- goto backup;
- }
- else if (*rp == MATCHNCLASS)
- goto backup;
-
- /* explicit fall-through */
-
- case MATCHONE:
- case MATCHANY:
- /* match exactly one token */
- mlp->first = avp;
- mlp->last = avp++;
- mlp++;
- break;
-
- case MATCHZANY:
- /* match zero or more tokens */
- mlp->first = avp;
- mlp->last = avp - 1;
- mlp++;
- break;
-
- default:
- /* must have exact match */
- if (strcasecmp(rp, ap))
- goto backup;
- avp++;
- break;
- }
-
- /* successful match on this token */
- rvp++;
- continue;
-
- backup:
- /* match failed -- back up */
- while (--rvp >= rwr->r_lhs)
- {
- rp = *rvp;
- if (*rp == MATCHANY || *rp == MATCHZANY)
- {
- /* extend binding and continue */
- avp = ++mlp[-1].last;
- avp++;
- rvp++;
- break;
- }
- avp--;
- if (*rp == MATCHONE || *rp == MATCHCLASS ||
- *rp == MATCHNCLASS)
- {
- /* back out binding */
- mlp--;
- }
- }
-
- if (rvp < rwr->r_lhs)
- {
- /* total failure to match */
- break;
- }
- }
-
- /*
- ** See if we successfully matched
- */
-
- if (rvp < rwr->r_lhs || *rvp != NULL)
- {
- if (tTd(21, 10))
- printf("----- rule fails\n");
- rwr = rwr->r_next;
- continue;
- }
-
- rvp = rwr->r_rhs;
- if (tTd(21, 12))
- {
- printf("-----rule matches:");
- printav(rvp);
- }
-
- rp = *rvp;
- if (*rp == CANONUSER)
- {
- rvp++;
- rwr = rwr->r_next;
- }
- else if (*rp == CANONHOST)
- {
- rvp++;
- rwr = NULL;
- }
- else if (*rp == CANONNET)
- rwr = NULL;
-
- /* substitute */
- for (avp = npvp; *rvp != NULL; rvp++)
- {
- register struct match *m;
- register char **pp;
-
- rp = *rvp;
- if (*rp == MATCHREPL)
- {
- /* substitute from LHS */
- m = &mlist[rp[1] - '1'];
- if (m >= mlp)
- {
- syserr("rewrite: ruleset %d: replacement out of bounds", ruleset);
- return;
- }
- if (tTd(21, 15))
- {
- printf("$%c:", rp[1]);
- pp = m->first;
- while (pp <= m->last)
- {
- printf(" %x=\"", *pp);
- (void) fflush(stdout);
- printf("%s\"", *pp++);
- }
- printf("\n");
- }
- pp = m->first;
- while (pp <= m->last)
- {
- if (avp >= &npvp[MAXATOM])
- {
- syserr("rewrite: expansion too long");
- return;
- }
- *avp++ = *pp++;
- }
- }
- else
- {
- /* vanilla replacement */
- if (avp >= &npvp[MAXATOM])
- {
- toolong:
- syserr("rewrite: expansion too long");
- return;
- }
- *avp++ = rp;
- }
- }
- *avp++ = NULL;
-
- /*
- ** Check for any hostname lookups.
- */
-
- for (rvp = npvp; *rvp != NULL; rvp++)
- {
- char **hbrvp;
- char **xpvp;
- int trsize;
- char *olddelimchar;
- char buf[MAXNAME + 1];
- char *pvpb1[MAXATOM + 1];
- char pvpbuf[PSBUFSIZE];
- extern char *DelimChar;
-
- if (**rvp != HOSTBEGIN)
- continue;
-
- /*
- ** Got a hostname lookup.
- **
- ** This could be optimized fairly easily.
- */
-
- hbrvp = rvp;
-
- /* extract the match part */
- while (*++rvp != NULL && **rvp != HOSTEND)
- continue;
- if (*rvp != NULL)
- *rvp++ = NULL;
-
- /* save the remainder of the input string */
- trsize = (int) (avp - rvp + 1) * sizeof *rvp;
- bcopy((char *) rvp, (char *) pvpb1, trsize);
-
- /* look it up */
- cataddr(++hbrvp, buf, sizeof buf);
- maphostname(buf, sizeof buf);
-
- /* scan the new host name */
- olddelimchar = DelimChar;
- xpvp = prescan(buf, '\0', pvpbuf);
- DelimChar = olddelimchar;
- if (xpvp == NULL)
- {
- syserr("rewrite: cannot prescan canonical hostname: %s", buf);
- return;
- }
-
- /* append it to the token list */
- for (avp = --hbrvp; *xpvp != NULL; xpvp++)
- {
- *avp++ = newstr(*xpvp);
- if (avp >= &npvp[MAXATOM])
- goto toolong;
- }
-
- /* restore the old trailing information */
- for (xpvp = pvpb1; (*avp++ = *xpvp++) != NULL; )
- if (avp >= &npvp[MAXATOM])
- goto toolong;
-
- break;
- }
-
- /*
- ** Check for subroutine calls.
- */
-
- if (*npvp != NULL && **npvp == CALLSUBR)
- {
- bcopy((char *) &npvp[2], (char *) pvp,
- (int) (avp - npvp - 2) * sizeof *avp);
- if (tTd(21, 3))
- printf("-----callsubr %s\n", npvp[1]);
- rewrite(pvp, atoi(npvp[1]));
- }
- else
- {
- bcopy((char *) npvp, (char *) pvp,
- (int) (avp - npvp) * sizeof *avp);
- }
- if (tTd(21, 4))
- {
- printf("rewritten as:");
- printav(pvp);
- }
- }
-
- if (OpMode == MD_TEST || tTd(21, 2))
- {
- printf("rewrite: ruleset %2d returns:", ruleset);
- printav(pvp);
- }
- }
- /*
- ** BUILDADDR -- build address from token vector.
- **
- ** Parameters:
- ** tv -- token vector.
- ** a -- pointer to address descriptor to fill.
- ** If NULL, one will be allocated.
- **
- ** Returns:
- ** NULL if there was an error.
- ** 'a' otherwise.
- **
- ** Side Effects:
- ** fills in 'a'
- */
-
- ADDRESS *
- buildaddr(tv, a)
- register char **tv;
- register ADDRESS *a;
- {
- static char buf[MAXNAME];
- struct mailer **mp;
- register struct mailer *m;
-
- if (a == NULL)
- a = (ADDRESS *) xalloc(sizeof *a);
- bzero((char *) a, sizeof *a);
-
- /* figure out what net/mailer to use */
- if (**tv != CANONNET)
- {
- syserr("buildaddr: no net");
- return (NULL);
- }
- tv++;
- if (!strcasecmp(*tv, "error"))
- {
- if (**++tv == CANONHOST)
- {
- setstat(atoi(*++tv));
- tv++;
- }
- if (**tv != CANONUSER)
- syserr("buildaddr: error: no user");
- buf[0] = '\0';
- while (*++tv != NULL)
- {
- if (buf[0] != '\0')
- (void) strcat(buf, " ");
- (void) strcat(buf, *tv);
- }
- usrerr(buf);
- return (NULL);
- }
- for (mp = Mailer; (m = *mp++) != NULL; )
- {
- if (!strcasecmp(m->m_name, *tv))
- break;
- }
- if (m == NULL)
- {
- syserr("buildaddr: unknown mailer %s", *tv);
- return (NULL);
- }
- a->q_mailer = m;
-
- /* figure out what host (if any) */
- tv++;
- if (!bitnset(M_LOCAL, m->m_flags))
- {
- if (**tv++ != CANONHOST)
- {
- syserr("buildaddr: no host");
- return (NULL);
- }
- buf[0] = '\0';
- while (*tv != NULL && **tv != CANONUSER)
- (void) strcat(buf, *tv++);
- a->q_host = newstr(buf);
- }
- else
- a->q_host = NULL;
-
- /* figure out the user */
- if (*tv == NULL || **tv != CANONUSER)
- {
- syserr("buildaddr: no user");
- return (NULL);
- }
-
- /* rewrite according recipient mailer rewriting rules */
- rewrite(++tv, 2);
- if (m->m_r_rwset > 0)
- rewrite(tv, m->m_r_rwset);
- rewrite(tv, 4);
-
- /* save the result for the command line/RCPT argument */
- cataddr(tv, buf, sizeof buf);
- a->q_user = buf;
-
- return (a);
- }
- /*
- ** CATADDR -- concatenate pieces of addresses (putting in <LWSP> subs)
- **
- ** Parameters:
- ** pvp -- parameter vector to rebuild.
- ** buf -- buffer to build the string into.
- ** sz -- size of buf.
- **
- ** Returns:
- ** none.
- **
- ** Side Effects:
- ** Destroys buf.
- */
-
- cataddr(pvp, buf, sz)
- char **pvp;
- char *buf;
- register int sz;
- {
- bool oatomtok = FALSE;
- bool natomtok = FALSE;
- register int i;
- register char *p;
-
- if (pvp == NULL)
- {
- (void) strcpy(buf, "");
- return;
- }
- p = buf;
- sz -= 2;
- while (*pvp != NULL && (i = strlen(*pvp)) < sz)
- {
- natomtok = (toktype(**pvp) == ATM);
- if (oatomtok && natomtok)
- *p++ = SpaceSub;
- (void) strcpy(p, *pvp);
- oatomtok = natomtok;
- p += i;
- sz -= i + 1;
- pvp++;
- }
- *p = '\0';
- }
- /*
- ** SAMEADDR -- Determine if two addresses are the same
- **
- ** This is not just a straight comparison -- if the mailer doesn't
- ** care about the host we just ignore it, etc.
- **
- ** Parameters:
- ** a, b -- pointers to the internal forms to compare.
- **
- ** Returns:
- ** TRUE -- they represent the same mailbox.
- ** FALSE -- they don't.
- **
- ** Side Effects:
- ** none.
- */
-
- bool
- sameaddr(a, b)
- register ADDRESS *a;
- register ADDRESS *b;
- {
- /* if they don't have the same mailer, forget it */
- if (a->q_mailer != b->q_mailer)
- return (FALSE);
-
- /* if the user isn't the same, we can drop out */
- if (strcmp(a->q_user, b->q_user) != 0)
- return (FALSE);
-
- /* if the mailer ignores hosts, we have succeeded! */
- if (bitnset(M_LOCAL, a->q_mailer->m_flags))
- return (TRUE);
-
- /* otherwise compare hosts (but be careful for NULL ptrs) */
- if (a->q_host == NULL || b->q_host == NULL)
- return (FALSE);
- if (strcmp(a->q_host, b->q_host) != 0)
- return (FALSE);
-
- return (TRUE);
- }
- /*
- ** PRINTADDR -- print address (for debugging)
- **
- ** Parameters:
- ** a -- the address to print
- ** follow -- follow the q_next chain.
- **
- ** Returns:
- ** none.
- **
- ** Side Effects:
- ** none.
- */
-
- printaddr(a, follow)
- register ADDRESS *a;
- bool follow;
- {
- bool first = TRUE;
-
- while (a != NULL)
- {
- first = FALSE;
- printf("%x=", a);
- (void) fflush(stdout);
- printf("%s: mailer %d (%s), host `%s', user `%s', ruser `%s'\n",
- a->q_paddr, a->q_mailer->m_mno, a->q_mailer->m_name,
- a->q_host, a->q_user, a->q_ruser? a->q_ruser: "<null>");
- printf("\tnext=%x, flags=%o, alias %x\n", a->q_next, a->q_flags,
- a->q_alias);
- printf("\thome=\"%s\", fullname=\"%s\"\n", a->q_home,
- a->q_fullname);
-
- if (!follow)
- return;
- a = a->q_next;
- }
- if (first)
- printf("[NULL]\n");
- }
-
- /*
- ** REMOTENAME -- return the name relative to the current mailer
- **
- ** Parameters:
- ** name -- the name to translate.
- ** m -- the mailer that we want to do rewriting relative
- ** to.
- ** senderaddress -- if set, uses the sender rewriting rules
- ** rather than the recipient rewriting rules.
- ** canonical -- if set, strip out any comment information,
- ** etc.
- **
- ** Returns:
- ** the text string representing this address relative to
- ** the receiving mailer.
- **
- ** Side Effects:
- ** none.
- **
- ** Warnings:
- ** The text string returned is tucked away locally;
- ** copy it if you intend to save it.
- */
-
- char *
- remotename(name, m, senderaddress, canonical)
- char *name;
- struct mailer *m;
- bool senderaddress;
- bool canonical;
- {
- register char **pvp;
- char *fancy;
- extern char *macvalue();
- char *oldg = macvalue('g', CurEnv);
- static char buf[MAXNAME];
- char lbuf[MAXNAME];
- char pvpbuf[PSBUFSIZE];
- extern char **prescan();
- extern char *crackaddr();
-
- if (tTd(12, 1))
- printf("remotename(%s)\n", name);
-
- /* don't do anything if we are tagging it as special */
- if ((senderaddress ? m->m_s_rwset : m->m_r_rwset) < 0)
- return (name);
-
- /*
- ** Do a heuristic crack of this name to extract any comment info.
- ** This will leave the name as a comment and a $g macro.
- */
-
- if (canonical)
- fancy = "\001g";
- else
- fancy = crackaddr(name);
-
- /*
- ** Turn the name into canonical form.
- ** Normally this will be RFC 822 style, i.e., "user@domain".
- ** If this only resolves to "user", and the "C" flag is
- ** specified in the sending mailer, then the sender's
- ** domain will be appended.
- */
-
- pvp = prescan(name, '\0', pvpbuf);
- if (pvp == NULL)
- return (name);
- rewrite(pvp, 3);
- if (CurEnv->e_fromdomain != NULL)
- {
- /* append from domain to this address */
- register char **pxp = pvp;
-
- /* see if there is an "@domain" in the current name */
- while (*pxp != NULL && strcmp(*pxp, "@") != 0)
- pxp++;
- if (*pxp == NULL)
- {
- /* no.... append the "@domain" from the sender */
- register char **qxq = CurEnv->e_fromdomain;
-
- while ((*pxp++ = *qxq++) != NULL)
- continue;
- rewrite(pvp, 3);
- }
- }
-
- /*
- ** Do more specific rewriting.
- ** Rewrite using ruleset 1 or 2 depending on whether this is
- ** a sender address or not.
- ** Then run it through any receiving-mailer-specific rulesets.
- */
-
- if (senderaddress)
- {
- rewrite(pvp, 1);
- if (m->m_s_rwset > 0)
- rewrite(pvp, m->m_s_rwset);
- }
- else
- {
- rewrite(pvp, 2);
- if (m->m_r_rwset > 0)
- rewrite(pvp, m->m_r_rwset);
- }
-
- /*
- ** Do any final sanitation the address may require.
- ** This will normally be used to turn internal forms
- ** (e.g., user@host.LOCAL) into external form. This
- ** may be used as a default to the above rules.
- */
-
- rewrite(pvp, 4);
-
- /*
- ** Now restore the comment information we had at the beginning.
- */
-
- cataddr(pvp, lbuf, sizeof lbuf);
- define('g', lbuf, CurEnv);
- expand(fancy, buf, &buf[sizeof buf - 1], CurEnv);
- define('g', oldg, CurEnv);
-
- if (tTd(12, 1))
- printf("remotename => `%s'\n", buf);
- return (buf);
- }
-