home *** CD-ROM | disk | FTP | other *** search
- /* addrs.c -- copyright (c) Dan Heller 1/25/1989 */
-
- #include "mush.h"
-
- /*
- * Check to see if all addressees in list1 is in list2.
- * The lists must be as clean as the driven snow (no comments, aliases
- * must have been expanded, all are separated by whitespace (for mk_argv).
- *
- * "user" matches "user" and "user@localhost"
- * "*user" matches "user" at any address whatsoever."
- * !host matches any user destined for the specified host.
- * !some!path is the same, but can be more specifiec in the path.
- * @dom.ain can match any user destined for any host within the domain.
- * @berkeley.edu would match: dheller@cory.berkeley.edu
- */
- compare_addrs(list1, list2, ret_buf)
- char *list1, *list2, ret_buf[];
- {
- register char *p;
- char **addrv, **listv, buf[256]; /* addrs aren't long */
- int addrc, listc, a, l, h, ret_val;
-
- /* autosign2 list contains non-comment addresses */
- listv = mk_argv(list1, &listc, FALSE);
- addrv = mk_argv(list2, &addrc, FALSE);
-
- /* loop thru both lists and convert addresses to !-format
- * then remove ourhost names so "user" matches "user!local"
- * also remove possible trailing commas (from list).
- */
- for (a = 0; a < addrc; a++) {
- if (a != addrc-1 && (p = index(addrv[a], ',')) && !p[1])
- *p = 0;
- if (addrv[a][0] == '!' || addrv[a][0] == '@')
- continue;
- (void) bang_form(buf, addrv[a]);
- if (strcmp(addrv[a], buf)) /* if they differ... */
- (void) strcpy(addrv[a], buf); /* save new version */
- }
- for (l = 0; l < listc; l++) {
- if (l != listc-1 && (p = index(listv[l], ',')) && !p[1])
- *p = 0;
- if (listv[l][0] == '!' || listv[l][0] == '@')
- continue;
- (void) bang_form(buf, listv[l]);
- if (strcmp(listv[l], buf)) /* if they differ... */
- (void) strdup(listv[l], buf); /* save new version */
- }
-
- Debug("\nlist1 = "), print_argv(listv);
- Debug("list2 = "), print_argv(addrv), putchar('\n');
-
- /* loop thru each list comparing each element with the
- * other, if necessary.
- */
- for (l = 0; l < listc; l++) {
- ret_val = 0;
- /* check if local recipient with was specified. */
- if (!(p = rindex(listv[l], '!')))
- for (a = 0; a < addrc; a++) {
- /* we have a local user so far. If addrv[] is
- * not remote, then strcmp() immediately.
- * Note that "!" with no host indicates *all*
- * local users!!!
- */
- if (addrv[a][0] == '*') {
- /* "*user" == "user" or "*" == login */
- if (!addrv[a][1] && !lcase_strncmp(listv[l], login, -1) ||
- !lcase_strncmp(listv[l], addrv[a]+1, -1))
- ret_val = 1;
- } else if (addrv[a][0] != '!') {
- if (!lcase_strncmp(addrv[a], listv[l], -1) || !addrv[a][1])
- ret_val = 1;
- } else for (h = 0; ourname && ourname[h]; h++)
- if (!lcase_strncmp(addrv[a]+1, ourname[h], -1)) {
- ret_val = 1;
- break;
- }
- if (ret_val)
- break;
- }
- /* else this is a remote user */
- else {
- /* check all the addresses for @dom.ain stuff or
- * !path!name type stuff only.
- */
- /* first back up p to the previous '!' */
- char *start, *user = p + 1;
- while (p > listv[l] && *--p != '!')
- ;
- start = p; /* Where to start for _domain_ addrs */
- for (a = 0; a < addrc; a++) {
- int len;
- char *path;
-
- /* first check the cases of address unmodified by @ and !
- * or check to see if *user is specified.
- */
- if (addrv[a][0] != '@' && addrv[a][0] != '!') {
- if (addrv[a][0] == '*') {
- /* we saved the username at "user" declaration. */
- /* if "*" is by itself, check against user's login */
- if (!addrv[a][1] && !lcase_strncmp(user, login, -1) ||
- addrv[a][1] && !lcase_strncmp(user,addrv[a]+1,-1)){
- ret_val = 1;
- break;
- }
- } else if (!lcase_strncmp(addrv[a], listv[l], -1)) {
- ret_val = 1;
- break;
- }
- continue;
- }
- path = addrv[a]+1;
- while (addrv[a][0] == '@' && *path == '.')
- path++;
- if ((len = strlen(path)) == 0)
- continue; /* localhost stuff only -- can't match */
- /* first check against specified domains */
- if (addrv[a][0] == '@') {
- for (p = start; p; (p = index(p, '.')) && ++p)
- if (!lcase_strncmp(p, path, len) &&
- (p[len] == '.' || p[len] == 0 || p[len] == '!')) {
- ret_val = 1;
- break;
- }
- } else if (addrv[a][0] == '!') {
- /* for !path style, start at head of addr */
- for (p = listv[l]; p; (p = index(p, '!')) && ++p)
- if (!lcase_strncmp(p, path, len) &&
- (p[len] == '!' || p[len] == 0)) {
- ret_val = 1;
- break;
- }
- }
- /* If address is in autosign2, goto next addr */
- if (ret_val)
- break;
- }
- }
- if (!ret_val) {
- /* this address isn't in autosign2 list */
- if (ret_buf)
- (void) strcpy(ret_buf, listv[l]);
- break;
- }
- }
- free_vec(listv);
- free_vec(addrv);
-
- return ret_val;
- }
-
- /*
- * Parser for stupidly-formed RFC822 addresses. It has been tested on
- * several bizzare cases as well as the normal stuff and uucp paths. It
- * takes a string which is a bunch of addresses and unscrambles the first
- * one in the string. It returns a pointer to the first char past what it
- * unscrambled and copies the unscrambled address to its second argument.
- *
- * It does NOT deal with trailing (comment) strings --
- * <whoever@somewhere> (This is a comment)
- * ^unscramble_addr return points here
- *
- * It also does not deal well with malformed <addresses> --
- * <whoever@somewhere,nowhere>
- * ^unscramble_addr return points here
- *
- * In each of the above cases, the string "whoever@somewhere" is copied
- * to the second argument.
- *
- * Nothing is done to un-<>ed route-less RFC822/976 addresses, nor to
- * uucp paths, nor to mixed-mode addresses not containing a route.
- * Hopelessly scrambled addresses are not handled brilliantly --
- * @some.dumb.place,@any.other.place:sys2!user%sys3@sys1
- * parses to
- * sys2!user%sys3@sys1
- * i.e., the route is simply dropped.
- *
- * If UUCP is defined, a little more work is done with @: routes. The
- * mangled address given above will unwind to
- * some.dumb.place!any.other.place!sys1!sys2!sys3!user
- * thanks to intelligence in bang_form().
- */
- char *
- unscramble_addr(addr, naddr)
- char *addr;
- char *naddr;
- {
- char *i, *r, *at;
- char s[BUFSIZ], t[BUFSIZ];
- int anglebrace = 0;
-
- /* Make a copy of the address so we can mangle it freely. */
- if (addr && *addr) {
- /* Skip any leading whitespace. */
- for (i = addr; *i && (r = any(i, " \t")) == i;)
- if (r)
- i = r + 1;
- if (*i == '\0')
- return NULL;
- /* Skip any leading double-quoted comment. */
- if (*i == '"') {
- if ((i = index(i + 1, '"')) && (*i == '\0' || *(++i) == '\0'))
- return NULL;
- }
- /* Skip any more whitespace. */
- for (; *i && (r = any(i, " \t")) == i;)
- if (r)
- i = r + 1;
- if (*i == '\0')
- return NULL;
- /* Check for angle braces around the address. */
- if (*i == '<') {
- if (*(++i) == '\0')
- return NULL;
- ++anglebrace;
- }
- /*
- * Look for a route. A route is a comma-separated set of @-tagged
- * domains terminated by a colon. Later versions might try to use
- * the route, but for now it confuses too many mailers.
- */
- if ((*i == '@') && (r = any(i, " \t:"))) {
- if (*r != ':')
- return NULL;
- if (*(r + 1) == '\0')
- return NULL;
- #ifndef UUCP
- /*
- * Back up to the rightmost @-tagged domain
- * (see note below about unwinding)
- */
- *r = '\0';
- i = rindex(i, '@');
- *r = ':';
- #endif /* !UUCP */
- }
- /* Remember how much we've skipped, and copy the rest. */
- at = i;
- (void) strncpy(t, i, sizeof t);
- t[sizeof t - 1] = 0;
- /* Strip from a trailing angle brace, if present. */
- if (anglebrace) {
- if (r = any(t, "> \t")) {
- if (r == t || *r != '>')
- return NULL;
- else
- *r = '\0';
- --anglebrace;
- } else
- return NULL;
- }
- if (t[0] == '@') {
- /* Chop off any invalid stuff after the address. */
- if (r = any(index(t, ':'), " \t,(<"))
- *r = '\0';
- }
- } else
- return NULL;
- /* Remember where we are so we can return it. */
- at += strlen(t) + 1;
- /*
- * Unscramble the route, if present.
- * NOTE: We assume that a route is present in only two cases:
- * 1) addr was taken from the "From " line of a stupid mailer
- * 2) addr was a well-formed, <> enclosed RFC822 address
- */
- if (t[0] == '@') {
- #ifdef UUCP
- if (!bang_form(s, t))
- return NULL;
- #else /* UUCP */
- if (r = index(t, ':'))
- r++;
- else
- return NULL;
- /* Delete the route if extraneous, otherwise unwind it. */
- if (i = index(r, '@'))
- (void) strcpy(s, r);
- else {
- /*
- * NOTE: Unwinding currently uses only the rightmost domain
- * in the route. This will break for mailers that need the
- * entire route. Complete unwinding would require the use
- * of % characters, which are avoided for other reasons.
- */
- (void) strcpy(s, r);
- *(--r) = '\0';
- (void) strcat(s, t);
- }
- #endif /* UUCP */
- } else
- (void) strcpy(s, t);
- /*
- * Ok, now the address should be in the form user@domain and
- * is held in buffer s (t[] is not copied directly to naddr
- * to allow future additional processing to be added here).
- */
- if (debug > 1) /* Don't dump this on trivial debugging */
- wprint("Converting \"%s\" to \"%s\"\n", addr, s);
- (void) strcpy(naddr, s);
- return at;
- }
-
- /*
- * Convert RFC822 or mixed addresses to RFC976 `!' form,
- * copying the new address to d. The source address is
- * translated according to RFC822 rules.
- * Return a pointer to the end (nul terminus) of d.
- */
- char *
- bang_form (d, s)
- char *d, *s;
- {
- char *r, *t, *ab = NULL;
-
- *d = '\0';
- /* If nothing to do, quit now */
- if (!s || !*s) {
- return d;
- }
- /* Avoid any angle braces */
- if (*s == '<') {
- if (ab = index(s + 1, '>'))
- s++, *ab = '\0';
- else
- return NULL;
- }
- /*
- * Look backwards for the first `@'; this gives us the
- * primary domain of the RFC822 address
- */
- if (*s == '@') {
- /* An RFC-822 "@domain1,@domain2:" routing */
- if (t = any(++s, ",:")) {
- char c = *t;
- *t = '\0';
- d += Strcpy(d, s);
- *d++ = '!';
- *t++ = c;
- r = bang_form(d, t);
- } else
- r = NULL;
- } else if ((t = rindex(s, '@')) && t != s) {
- /* Copy the RFC822 domain as the UUCP head */
- d += Strcpy(d, t + 1);
- *d++ = '!';
- *t = '\0';
- r = bang_form(d, s);
- *t = '@';
- } else if (t = index(s, '!')) {
- /* A normal UUCP path */
- *t = '\0';
- d += Strcpy(d, s);
- *t++ = *d++ = '!';
- r = bang_form(d, t);
- } else if (t = rindex(s, '%')) {
- /* An imbedded `%' -- treat as low-priority `@' */
- *t = '@';
- r = bang_form(d, s);
- *t = '%';
- } else
- r = d + Strcpy(d, s); /* No `@', `!', or `%' */
- if (ab)
- *ab = '>';
- return r;
- }
-
- /*
- * Route addresses according to certain criteria. This function is really
- * just a front end for improve_uucp_paths() which does routing (differently).
- * If "route" is null, this routine is being called incorrectly.
- * If route is an address, just call improve_uucp_paths() and return.
- * If route is the null string, then route all addresses via the sender's
- * which is the first name/address on the To: list. If he's on a remote
- * machine, chances are that the addresses of everyone else he mailed to
- * are addresses from his machine. Reconstruct those addresses to route
- * thru the senders machine first.
- */
- route_addresses(to, cc, route_path)
- char *to, *cc, *route_path;
- {
- char pre_path[256], sender[HDRSIZ], tmp[256];
- register char *next, *p;
- int c;
-
- Debug("route_addresses()\n");
- if (!route_path)
- return;
- if (*route_path) {
- improve_uucp_paths(to, HDRSIZ, route_path);
- improve_uucp_paths(cc, HDRSIZ, route_path);
- return;
- }
-
- pre_path[0] = 0;
- /* Get the address of the sender (which is always listed first) */
- if (!(next = get_name_n_addr(to, NULL, NULL)))
- return;
- c = *next, *next = 0;
- (void) strcpy(sender, to);
- *next = c;
- /* fix up the sender's address; improve_uucp_paths to optimize pre_path */
- improve_uucp_paths(sender, sizeof sender, NULL);
-
- /* check to see if there is only one addr on To: line and no Cc: header */
- if (!*next && (!cc || !*cc)) {
- (void) strcpy(to, sender);
- return;
- }
- /* otherwise, get the pre_path */
- if (p = get_name_n_addr(sender, NULL, tmp))
- c = p - sender; /* save the original length */
- if (*tmp) {
- (void) bang_form(pre_path, tmp);
- if (p = rindex(pre_path, '!')) {
- *p = 0;
- Debug("Routing thru \"%s\"\n", pre_path);
- } else
- pre_path[0] = 0;
- } else
- pre_path[0] = 0;
-
- while (*next == ',' || isspace(*next))
- next++;
- improve_uucp_paths(next, HDRSIZ - (int)(next - to), pre_path);
- improve_uucp_paths(cc, HDRSIZ, pre_path);
- p = sender + c;
- *p++ = ',', *p++ = ' ';
- (void) strcpy(p, next);
- (void) strcpy(to, sender);
- }
-
- /*
- * pass a string describing header like, "Subject: ", current value, and
- * whether or not to prompt for it or to just post the information.
- * If do_prompt is true, "type in" the current value so user can either
- * modify it, erase it, or add to it.
- */
- char *
- set_header(str, curstr, do_prompt)
- register char *str, *curstr;
- {
- static char buf[HDRSIZ];
- int offset = 0;
- register char *p = curstr;
-
- if (!str)
- str = "";
-
- buf[0] = 0;
- print(str);
- (void) fflush(stdout); /* force str curstr */
- if (do_prompt) {
- if (curstr)
- if (isoff(glob_flags, ECHO_FLAG)) {
- Ungetstr(curstr);
- } else
- #ifdef TIOCSTI
- for (p = curstr; *p; p++)
- if (ioctl(0, TIOCSTI, p) == -1) {
- error("ioctl: TIOCSTI");
- print("You must retype the entire line.\n%s", str);
- break;
- }
- #else /* !TIOCSTI */
- print("WARNING: -e flag! Type the line over.\n%s", str);
- #endif /* TIOCSTI */
-
- if (istool)
- return NULL;
- /* simulate the fact that we're getting input for the letter even tho
- * we may not be. set_header is called before IS_GETTING is true,
- * but if we set it to true temporarily, then signals will return to
- * the right place (stop/continue).
- */
- {
- u_long getting = ison(glob_flags, IS_GETTING);
- int wrapping = wrapcolumn;
- /* Funky trick here. If the prompt string is empty,
- * assume that we are allowed to do line wrap;
- * otherwise, temporarily disable line wrap
- */
- if (*str)
- wrapcolumn = 0;
- if (!getting)
- turnon(glob_flags, IS_GETTING);
- if (Getstr(buf, sizeof(buf), offset) == -1) {
- putchar('\n');
- buf[0] = 0;
- }
- if (!getting)
- turnoff(glob_flags, IS_GETTING);
- wrapcolumn = wrapping;
- }
- } else
- puts(strcpy(buf, curstr));
- if (debug > 1)
- print("returning (%s) from set_header\n", buf);
- return buf;
- }
-
- /*
- * improve uucp paths by looking at the name of each host listed in the
- * path given.
- * sun!island!pixar!island!argv
- * It's a legal address, but redundant. Also, if we know we talk to particular
- * hosts via uucp, then we can just start with that host and disregard the path
- * preceding it. So, first get the known hosts and save them. Then start
- * at the end of the original path (at the last ! found), and move backwards
- * saving each hostname. If we get to a host that we know about, stop there
- * and use that address. If the system knows about domains, skip all paths
- * that precede a domain hostname. If we get to a host we've already seen,
- * then delete it and all the hosts since then until the first occurrence of
- * that hostname. When we get to the beginning, the address will be complete.
- * The route_path is prepended to each address to check make sure this path
- * is used if no known_hosts precede it in that address.
- *
- * Return all results into the original buffer passed to us. If route_path
- * adds to the length of all the paths, then the original buffer could be
- * overwritten. someone should check for this!
- */
- improve_uucp_paths(original, size, route_path)
- char *original, *route_path;
- {
- char name[256], addr[256], buf[2 * HDRSIZ], *end;
- char *hostnames[32], tmp[sizeof addr], *domain_path;
- register char *p, *p2, *recipient, *start = original, *b = buf;
- int saved_hosts, i, is_domain;
-
- if (!original || !*original)
- return;
-
- /* use domain_path to point to the path for pathnames that have
- * a fully qualified domain host in them.
- */
- domain_path = do_set(set_options, "domain_route");
- while (end = get_name_n_addr(start, name, tmp)) {
- /* first copy the route path, then the rest of the address. */
- p = addr;
- if (route_path && *route_path) {
- p += Strcpy(addr, route_path);
- *p++ = '!';
- }
- (void) bang_form(p, tmp);
- saved_hosts = 0;
- if (p2 = rindex(p, '!')) {
- recipient = p2+1;
- /* save the uucp-style address *without* route_path in tmp */
- (void) strcpy(tmp, p);
- for (p = p2; p > addr; p--) {
- is_domain = 0;
- /* null the '!' separating the rest of the path from the part
- * of the path preceding it and move p back to the previous
- * '!' (or beginning to addr) for hostname to point to.
- */
- for (*p-- = 0; p > addr && *p != '!'; p--)
- if (!is_domain && domain_path && *p == '.' &&
- lcase_strncmp(p, ".uucp", 5))
- is_domain++;
- /* if p is not at the addr, move it forward past the '!' */
- if (p != addr)
- ++p; /* now points to a null terminated hostname */
- /* if host is ourselves, ignore this and preceding hosts */
- for (i = 0; ourname && ourname[i]; i++)
- if (!lcase_strncmp(p, ourname[i], -1))
- break;
- if (ourname && ourname[i]) {
- is_domain = 0; /* we've eliminated all domains */
- break;
- }
- /* check already saved hostnames. If host is one of them,
- * delete remaining hostnames since there is a redundant path.
- */
- for (i = 0; i < saved_hosts; i++)
- if (!lcase_strncmp(hostnames[i], p, -1))
- saved_hosts = i;
-
- /* Add the hostname to the path being constructed */
- hostnames[saved_hosts++] = p;
-
- /* If the original path or the address is a fully qualified
- * hostname (domain info is included), then break here
- */
- if (p == addr || is_domain && domain_path)
- break;
- /* If we know that we call this host, break */
- for (i = 0; known_hosts && known_hosts[i]; i++)
- if (!lcase_strncmp(p, known_hosts[i], -1))
- break;
- if (known_hosts && known_hosts[i])
- break;
- }
- /* temporary holder for where we are in buffer (save address) */
- p2 = b;
- if (is_domain && domain_path && *domain_path)
- b += Strcpy(b, domain_path), *b++ = '!';
- while (saved_hosts-- > 0) {
- b += Strcpy(b, hostnames[saved_hosts]);
- *b++ = '!';
- }
- b += Strcpy(b, recipient);
- if (!strcmp(p2, tmp)) { /* if the same, address was unmodified */
- b = p2; /* reset offset in buf (b) to where we were (p2) */
- goto unmodified;
- }
- if (*name)
- b += strlen(sprintf(b, " (%s)", name));
- } else {
- char c;
- unmodified:
- c = *end;
- *end = 0;
- b += Strcpy(b, start); /* copy the entire address with comments */
- *end = c;
- }
- if (b - buf > size) {
- wprint("Warning: address list truncated!\n");
- /* Use a very poor heuristic to find the last complete address */
- for (b = buf+size - 1; *b != ','; b--)
- ;
- wprint("Lost addresses: %s%s\n", b, end); /* end = not yet parsed */
- while (isspace(*b) || *b == ',')
- b--;
- break;
- }
- for (start = end; *start == ',' || isspace(*start); start++)
- ;
- if (!*start)
- break;
- *b++ = ',', *b++ = ' ', *b = '\0';
- }
- (void) strcpy(original, buf);
- }
-
- /*
- * rm_cmts_in_addr() removes the comment lines in addresses that result from
- * sendmail or other mailers which append the user's "real name" on the
- * from lines. See get_name_n_addr().
- */
- rm_cmts_in_addr(str)
- register char *str;
- {
- char addr[BUFSIZ], buf[HDRSIZ], *start = str;
- register char *b = buf;
-
- *b = 0;
- do {
- if (!(str = get_name_n_addr(str, NULL, addr)))
- break;
- b += Strcpy(b, addr);
- while (*str == ',' || isspace(*str))
- str++;
- if (*str)
- *b++ = ',', *b++ = ' ', *b = '\0';
- } while (*str);
- for (b--; b > start && (*b == ',' || isspace(*b)); b--)
- *b = 0;
- (void) strcpy(start, buf);
- }
-
- /*
- * take_me_off() is intended to search for the user's login name in an
- * address string and remove it. If "metoo" is set, return without change.
- * determine which addresses are the "user'"'s addresses by comparing them
- * against the host/path names in alternates. If the "*" is used, then
- * this matches the address against the user's current login and -any- path.
- *
- * Note that the alternates list is an array of addresses stored *reversed*!
- */
- take_me_off(str)
- char *str;
- {
- int i = 0, rm_me;
- char tmp[256], addr[256], buf[HDRSIZ], *start = str;
- register char *p, *p2, *b = buf;
-
- if (!str || !*str)
- return;
-
- Debug("take_me_off()\n");
- *b = 0;
- do {
- rm_me = FALSE;
- /* get the first "address" and advance p to next addr (ignore name) */
- if (!(p = get_name_n_addr(str, NULL, tmp)))
- break; /* we've reached the end of the address list */
- /* see if user's login is in the address */
- if (!strcmp(login, tmp))
- rm_me = TRUE;
- else {
- int len;
- /* put address in !-format and store in "addr" */
- (void) bang_form(addr, tmp);
- (void) reverse(addr);
- for (i = 0; alternates && alternates[i] && !rm_me; i++) {
- if (alternates[i][0] == '*') {
- if (alternates[i][1] == '\0')
- p2 = reverse(strcpy(tmp, login));
- else
- p2 = reverse(strcpy(tmp, &alternates[i][1]));
- } else
- p2 = alternates[i];
- if (!lcase_strncmp(p2, addr, (len = strlen(p2))) &&
- (!addr[len] || addr[len] == '!')) {
- Debug("\t%s\n", reverse(addr));
- rm_me = TRUE;
- }
- }
- for (i = 0; !rm_me && ourname && ourname[i]; i++) {
- p2 = tmp + Strcpy(tmp, ourname[i]);
- *p2++ = '!';
- (void) strcpy(p2, login);
- (void) reverse(tmp);
- if (!lcase_strncmp(tmp, addr, (len = strlen(tmp))) &&
- (!addr[len] || addr[len] == '!')) {
- Debug("\t%s\n", reverse(addr));
- rm_me = TRUE;
- }
- }
- }
- /* The address is not the user's -- put it into the returned list */
- if (!rm_me) {
- char c = *p;
- *p = 0;
- b += Strcpy(b, str);
- *p = c;
- }
- while (*p == ',' || isspace(*p))
- p++;
- if (*p && !rm_me)
- *b++ = ',', *b++ = ' ', *b = '\0';
- } while (*(str = p));
- for (b--; b > buf && (*b == ',' || isspace(*b)); b--)
- *b = 0;
- (void) strcpy(start, buf);
- }
-
- /*
- * Place commas in between all addresses that don't already have
- * them. Addresses which use comments which are in parens or _not_
- * within angle brackets *must* already have commas around them or
- * you can't determine what is a comment and what is an address.
- */
- fix_up_addr(str)
- char *str;
- {
- char buf[HDRSIZ], *start = str;
- register char c, *p, *b = buf;
-
- *b = 0;
- do {
- /* get_name returns a pointer to the next address */
- if (!(p = get_name_n_addr(str, NULL, NULL)))
- break;
- c = *p, *p = 0;
- if (strlen(str) + (b - buf) >= sizeof(buf) - 2) {
- /* wprint("Address too long! Lost address: \"%s\"\n", str); */
- *p = c;
- break;
- }
- for (b += Strcpy(b, str); b > buf && isspace(*(b-1)); b--)
- *b = 0;
- for (*p = c; *p == ',' || isspace(*p); p++)
- ;
- if (*p)
- *b++ = ',', *b++ = ' ', *b = '\0';
- } while (*(str = p));
- for (b--; b > buf && (*b == ',' || isspace(*b)); b--)
- *b = 0;
- (void) strcpy(start, buf);
- }
-
- /*
- * Remove redundant addresses.
- * Assume improve_uucp_paths, fix_up_addr or whatever have already been called.
- */
- rm_redundant_addrs(to, cc)
- char *to, *cc;
- {
- char tmp[256], addr[256], buf[HDRSIZ];
- char **list; /* a list of addresses for comparison */
- int list_cnt = 0, l;
- register char c, *p, *b, *start;
-
- Debug("rm_redundant_addrs()\n");
- list = (char **) calloc(256, sizeof(char *));
- if (!list) {
- error("out of memory in rm_redundant_addrs");
- return;
- }
- start = to;
- b = buf, *b = 0;
- /* first do the To header */
- do {
- /* get_name returns a pointer to the next address */
- if (!(p = get_name_n_addr(to, NULL, tmp)))
- break;
- c = *p, *p = 0;
- (void) bang_form(addr, tmp);
- for (l = 0; l < list_cnt; l++)
- if (!lcase_strncmp(addr, list[l], -1))
- break;
- /* if l == list_cnt, we got a new address, store it and add to buf */
- if (l == list_cnt) {
- /* Don't overwrite buffer. */
- if (list_cnt < 256)
- list[list_cnt++] = savestr(addr);
- if (b > buf)
- *b++ = ',', *b++ = ' ', *b = '\0';
- for (b += Strcpy(b, to); b > buf && isspace(*(b-1)); b--)
- *b = 0;
- } else
- Debug("\t%s\n", tmp); /* already specified (removed from list) */
- for (*p = c; *p == ',' || isspace(*p); p++)
- ;
- } while (*(to = p));
- for (b--; b > buf && (*b == ',' || isspace(*b)); b--)
- *b = 0;
- (void) strcpy(start, buf);
- b = buf, *b = 0;
- /* Now do the Cc header. If addr is listed in the To field, rm it in cc */
- start = cc;
- do {
- /* get_name returns a pointer to the next address */
- if (!(p = get_name_n_addr(cc, NULL, tmp)))
- break;
- c = *p, *p = 0;
- (void) bang_form(addr, tmp);
- for (l = 0; l < list_cnt; l++)
- if (!lcase_strncmp(addr, list[l], -1))
- break;
- if (l == list_cnt) {
- /* Don't overwrite buffer. */
- if (list_cnt < sizeof(list)/sizeof(char *))
- list[list_cnt++] = savestr(addr);
- if (b > buf)
- *b++ = ',', *b++ = ' ', *b = '\0';
- for (b += Strcpy(b, cc); b > buf && isspace(*(b-1)); b--)
- *b = 0;
- } else
- Debug("\t%s\n", tmp); /* already specified (removed from list) */
- for (*p = c; *p == ',' || isspace(*p); p++)
- ;
- } while (*(cc = p));
- list[list_cnt] = NULL; /* for free_vec */
- free_vec(list);
- for (b--; b > buf && (*b == ',' || isspace(*b)); b--)
- *b = 0;
- (void) strcpy(start, buf);
- }
-
- /*
- * Get address and name from a string (str) which came from an address header
- * in a message or typed by the user. The string may contain one or more
- * well-formed addresses. Each must be separated by a comma.
- *
- * address, address, address
- * address (comment or name here)
- * comment or name <address>
- * "Comment, even those with comma's!" <address>
- * address (comma, (more parens), etc...)
- *
- * This does *not* handle cases like:
- * comment <address (comment)>
- *
- * find the *first* address here and return a pointer to the end of the
- * address (usually a comma). Return NULL on error: non-matching parens,
- * brackets, quotes...
- */
- char *
- get_name_n_addr(str, name, addr)
- register char *str, *name, *addr;
- {
- register char *p, *p2, *beg_addr = addr, *beg_name = name, c;
-
- if (addr)
- *addr = 0;
- if (name)
- *name = 0;
- if (!str || !*str)
- return NULL;
-
- while (isspace(*str))
- str++;
-
- /* first check to see if there's something to look for */
- if (!(p = any(str, ",(<\""))) {
- /* no comma or indication of a quote character. Find a space and
- * return that. If nothing, the entire string is a complete address
- */
- if (p = any(str, " \t"))
- c = *p, *p = 0;
- if (addr)
- (void) strcpy(addr, str);
- if (p)
- *p = c;
- return p? p : str + strlen(str);
- }
-
- /* comma terminated before any comment stuff. If so, check for whitespace
- * before-hand cuz it's possible that strings aren't comma separated yet
- * and they need to be.
- *
- * address address address, address
- * ^p <- p points here.
- * ^p2 <- should point here.
- */
- if (*p == ',') {
- c = *p, *p = 0;
- if (p2 = any(str, " \t"))
- *p = ',', c = *p2, p = p2, *p = 0;
- if (addr)
- (void) strcpy(addr, str);
- *p = c;
- return p;
- }
-
- /* starting to get hairy -- we found an angle bracket. This means that
- * everything outside of those brackets are comments until we find that
- * all important comma. A comment AFTER the <addr> :
- * <address> John Doe
- * can't call this function recursively or it'll think that "John Doe"
- * is a string with two legal address on it (each name being an address).
- */
- if (*p == '<') { /* note that "str" still points to comment stuff! */
- if (name && *str) {
- *p = 0;
- name += Strcpy(name, str);
- *p = '<';
- }
- if (!(p2 = index(p+1, '>'))) {
- wprint("Warning! Malformed address: \"%s\"\n", str);
- return NULL;
- }
- if (addr) {
- /* to support <addr (comment)> style addresses, add code here */
- *p2 = 0;
- skipspaces(1);
- addr += Strcpy(addr, p);
- while (addr > beg_addr && isspace(*(addr-1)))
- *--addr = 0;
- *p2 = '>';
- }
- /* take care of the case "... <addr> com (ment)" */
- {
- int p_cnt = 0; /* parenthesis counter */
- p = p2;
- /* don't recurse yet -- scan till null, comma or '<'(add to name) */
- for (p = p2; p[1] && (p_cnt || p[1] != ',' && p[1] != '<'); p++) {
- if (p[1] == '(')
- p_cnt++;
- else if (p[1] == ')')
- p_cnt--;
- if (name)
- *name++ = p[1];
- }
- if (p_cnt) {
- wprint("Warning! Malformed name: \"%s\"\n", name);
- return NULL;
- }
- }
- if (name && name > beg_name) {
- while (isspace(*(name-1)))
- --name;
- *name = 0;
- }
- }
-
- /* this is the worst -- now we have parentheses/quotes. These guys can
- * recurse pretty badly and contain commas within them.
- */
- if (*p == '(' || *p == '"') {
- char *start = p;
- int comment = 1;
- c = *p;
- /* "str" points to address while p points to comments */
- if (addr && *str) {
- *p = 0;
- while (isspace(*str))
- str++;
- addr += Strcpy(addr, str);
- while (addr > beg_addr && isspace(*(addr-1)))
- *--addr = 0;
- *p = c;
- }
- while (comment) {
- if (c == '"' && !(p = index(p+1, '"')) ||
- c == '(' && !(p = any(p+1, "()"))) {
- wprint("Warning! Malformed address: \"%s\"\n", str);
- return NULL;
- }
- if (*p == '(') /* loop again on parenthesis. quote ends loop */
- comment++;
- else
- comment--;
- }
- /* Something like ``Comment (Comment) <addr>''. In this case
- * the name should include both comment parts with the
- * parenthesis. We have to redo addr.
- */
- if ((p2 = any(p+1, "<,")) && *p2 == '<') {
- if (!(p = index(p2, '>'))) {
- wprint("Warning! Malformed address: \"%s\"\n", str);
- return NULL;
- }
- if (addr = beg_addr) { /* reassign addr and compare to null */
- c = *p; *p = 0;
- addr += Strcpy(addr, p2+1);
- while (addr > beg_addr && isspace(*(addr-1)))
- *--addr = 0;
- *p = c;
- }
- if (name) {
- c = *p2; *p2 = 0;
- name += Strcpy(name, str);
- while (name > beg_name && isspace(*(name-1)))
- *--name = 0;
- *p2 = c;
- }
- } else if (name && start[1]) {
- c = *p, *p = 0; /* c may be ')' instead of '(' now */
- name += Strcpy(name, start+1);
- while (name > beg_name && isspace(*(name-1)))
- *--name = 0;
- *p = c;
- }
- }
- skipspaces(1);
- /* this is so common, save time by returning now */
- if (!*p || *p == ',')
- return p;
- return get_name_n_addr(p, name, addr);
- }
-
- /* takes string 's' which can be a name or list of names separated by
- * commas and checks to see if each is aliased to something else.
- * return address of the static buf.
- */
- char *
- alias_to_address(s)
- register char *s;
- {
- static char buf[HDRSIZ];
- register char *p, *p2, *tmp;
- char newbuf[HDRSIZ], c;
- static int recursive;
-
- if (!aliases)
- return strcpy(buf, s);
- if (!s || !*s)
- return NULL;
- if (!recursive) {
- bzero(buf, sizeof buf);
- p2 = buf; /* if we're starting all this, p2 starts at &buf[0] */
- } else
- p2 = buf+strlen(buf); /* else, pick up where we left off */
-
- if (++recursive == 30) {
- wprint("alias references too many addresses!\n");
- recursive = 0;
- return NULL;
- }
- do {
- char addr[256];
- if (!(p = get_name_n_addr(s, NULL, addr)))
- break;
- c = *p, *p = 0;
-
- /* On recursive calls, compare against the entire
- * previous expansion, not just the address part.
- */
- if (recursive > 1)
- (void) strcpy(addr, s);
-
- /* if this is an alias, recurse this routine to expand it out */
- if ((tmp = do_set(aliases, addr)) && *tmp) {
- if (!alias_to_address(strcpy(newbuf, tmp))) {
- *p = c;
- return NULL;
- } else
- p2 = buf+strlen(buf);
- /* Now, make sure the buffer doesn't overflow */
- } else if (strlen(s) + (p2-buf) + 2 > sizeof buf) { /* add ", " */
- wprint("address length too long.\n");
- recursive = 0;
- *p = c;
- return NULL;
- } else {
- /* append the new alias (or unchanged address) onto the buffer */
- p2 += Strcpy(p2, s);
- *p2++ = ',', *p2++ = ' ', *p2 = '\0';
- }
- for (*p = c; *p == ',' || isspace(*p); p++)
- ;
- } while (*(s = p));
- if (recursive)
- recursive--;
- if (!recursive)
- *(p2-2) = 0; /* get rid of last ", " if end of recursion */
- return buf;
- }
-
- /*
- * Wrap addresses so that the headers don't exceed n chars (typically 80).
- */
- char *
- wrap_addrs(str, n)
- char *str;
- {
- char buf[HDRSIZ * 2], *start = str;
- register char *b = buf, *p, c, *line_start = buf;
-
- *b = 0;
- do {
- /* get_name returns a pointer to the next address */
- if (!(p = get_name_n_addr(str, NULL, NULL)))
- break;
- c = *p, *p = 0;
- if (b > buf) {
- *b++ = ',', *b++ = ' ', *b = '\0';
- if (b - line_start + strlen(str) + 8 /* \t = 8 */ >= n)
- *b++ = '\n', *b++ = '\t', line_start = b;
- }
- for (b += Strcpy(b, str); b > buf && isspace(*(b-1)); b--)
- *b = 0;
- for (*p = c; *p == ',' || isspace(*p); p++)
- ;
- } while (*(str = p));
- for (b--; b > buf && (*b == ',' || isspace(*b)); b--)
- *b = 0;
- return strcpy(start, buf);
- }
-