+++ /dev/null
-/*
- * citmail.c v4.2
- * $Id$
- *
- * This program may be used as a local mail delivery agent, which will allow
- * all Citadel users to receive Internet e-mail. To enable this functionality,
- * you must tell sendmail, smail, or whatever mailer you are using, that this
- * program is your local mail delivery agent. This program is a direct
- * replacement for lmail, deliver, or whatever.
- *
- * Usage:
- *
- * citmail <recipient> - Deliver a message
- * citmail -t <recipient> - Address test mode (will not deliver)
- *
- */
-
-#include "sysdep.h"
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <ctype.h>
-#include <string.h>
-#include <time.h>
-#include <pwd.h>
-#include <errno.h>
-#include <syslog.h>
-#include <limits.h>
-#include "citadel.h"
-#include "config.h"
-#include "internetmail.h"
-
-/* message delivery classes */
-enum {
- DELIVER_LOCAL,
- DELIVER_REMOTE,
- DELIVER_INTERNET,
- DELIVER_CCITADEL
-};
-
-
-#undef tolower
-#define tolower(x) isupper(x) ? (x+'a'-'A') : x
-
-char *monthdesc[] =
-{"Jan", "Feb", "Mar", "Apr", "May", "Jun",
- "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
-
-char ALIASES[128];
-char CIT86NET[128];
-char SENDMAIL[128];
-char FALLBACK[128];
-char GW_DOMAIN[128];
-char TABLEFILE[128];
-char OUTGOING_FQDN[128];
-int RUN_NETPROC = 1;
-
-
-long conv_date(char *sdbuf)
-{
- int a, b, cpos, tend, tval;
- time_t now;
- struct tm *tmbuf;
- char dbuf[128];
-
- strcpy(dbuf, sdbuf);
- time(&now);
- tmbuf = (struct tm *) localtime(&now);
-
- /* get rid of + or - timezone mods */
- for (a = 0; a < strlen(dbuf); ++a)
- if ((dbuf[a] == '+') || (dbuf[a] == '-'))
- do {
- strcpy(&dbuf[a], &dbuf[a + 1]);
- } while ((dbuf[a] != 32) && (dbuf[a] != 0));
-
- /* try and extract the time by looking for colons */
- cpos = (-1);
- for (a = strlen(dbuf); a >= 0; --a)
- if ((dbuf[a] == ':') && (atoi(&dbuf[a - 1]) != 0))
- cpos = a;
- if (cpos >= 0) {
- cpos = cpos - 2;
- tend = strlen(dbuf);
- for (a = tend; a >= cpos; --a)
- if (dbuf[a] == ' ')
- tend = a;
-
- tmbuf->tm_hour = atoi(&dbuf[cpos]);
- tmbuf->tm_min = atoi(&dbuf[cpos + 3]);
- tmbuf->tm_sec = atoi(&dbuf[cpos + 6]);
-
- do {
- strcpy(&dbuf[cpos], &dbuf[cpos + 1]);
- } while ((dbuf[cpos] != 32) && (dbuf[cpos] != 0));
- }
- /* next try to extract a month */
-
- tval = (-1);
- for (a = 0; a < strlen(dbuf); ++a)
- for (b = 0; b < 12; ++b)
- if (!strncmp(&dbuf[a], monthdesc[b], 3)) {
- tval = b;
- cpos = a;
- }
- if (tval >= 0) {
- tmbuf->tm_mon = tval;
- strcpy(&dbuf[cpos], &dbuf[cpos + 3]);
- }
- /* now the year */
-
- for (a = 0; a < strlen(dbuf); ++a)
- if ((atoi(&dbuf[a]) >= 1900) && (dbuf[a] != 32)) {
- tmbuf->tm_year = atoi(&dbuf[a]) - 1900;
- strcpy(&dbuf[a], &dbuf[a + 4]);
- }
- /* whatever's left is the mday (hopefully) */
-
- for (a = 0; a < strlen(dbuf); ++a)
- if ((dbuf[a] != 32) && (atoi(&dbuf[a]) >= 1) && (atoi(&dbuf[a]) <= 31)
- && ((a == 0) || (dbuf[a - 1] == ' '))) {
- tmbuf->tm_mday = atoi(&dbuf[a]);
- strcpy(&dbuf[a], &dbuf[a + 2]);
- }
- return ((long) mktime(tmbuf));
-}
-
-
-#ifndef HAVE_STRERROR
-/*
- * replacement strerror() for systems that don't have it
- */
-char *strerror(int e)
-{
- static char buf[32];
-
- snprintf(buf, sizeof buf, "errno = %d", e);
- return (buf);
-}
-#endif
-
-int haschar(char *st, int ch)
-{
- int a, b;
- b = 0;
- for (a = 0; a < strlen(st); ++a)
- if (st[a] == ch)
- ++b;
- return (b);
-}
-
-void strip_trailing_whitespace(char *buf)
-{
- while (isspace(buf[strlen(buf) - 1]))
- buf[strlen(buf) - 1] = 0;
-}
-
-/* strip leading and trailing spaces */
-void striplt(char *buf)
-{
- while ((strlen(buf) > 0) && (buf[0] == 32))
- strcpy(buf, &buf[1]);
- while (buf[strlen(buf) - 1] == 32)
- buf[strlen(buf) - 1] = 0;
-}
-
-
-/*
- * Check to see if a given FQDN really maps to a Citadel network node
- */
-void host_alias(char host[])
-{
-
- int a;
-
- /* What name is the local host known by? */
- /* if (!strcasecmp(host, config.c_fqdn)) { */
- if (IsHostLocal(host)) {
- strcpy(host, config.c_nodename);
- return;
- }
- /* Other hosts in the gateway domain? */
- for (a = 0; a < strlen(host); ++a) {
- if ((host[a] == '.') && (!strcasecmp(&host[a + 1], GW_DOMAIN))) {
- host[a] = 0;
- for (a = 0; a < strlen(host); ++a) {
- if (host[a] == '.')
- host[a] = 0;
- }
- return;
- }
- }
-
- /* Otherwise, do nothing... */
-}
-
-
-
-/*
- * Split an RFC822-style address into userid, host, and full name
- */
-void process_rfc822_addr(char *rfc822, char *user, char *node, char *name)
-{
- int a;
-
- /* extract full name - first, it's From minus <userid> */
- strcpy(name, rfc822);
- for (a = 0; a < strlen(name); ++a)
- if (name[a] == '<') {
- do {
- strcpy(&name[a], &name[a + 1]);
- } while ((strlen(name) > 0) && (name[a] != '>'));
- strcpy(&name[a], &name[a + 1]);
- }
- /* strip anything to the left of a bang */
- while ((strlen(name) > 0) && (haschar(name, '!') > 0))
- strcpy(name, &name[1]);
-
- /* and anything to the right of a @ or % */
- for (a = 0; a < strlen(name); ++a) {
- if (name[a] == '@')
- name[a] = 0;
- if (name[a] == '%')
- name[a] = 0;
- }
-
- /* but if there are parentheses, that changes the rules... */
- if ((haschar(rfc822, '(') == 1) && (haschar(rfc822, ')') == 1)) {
- strcpy(name, rfc822);
- while ((strlen(name) > 0) && (name[0] != '(')) {
- strcpy(&name[0], &name[1]);
- }
- strcpy(&name[0], &name[1]);
- for (a = 0; a < strlen(name); ++a)
- if (name[a] == ')')
- name[a] = 0;
- }
- /* but if there are a set of quotes, that supersedes everything */
- if (haschar(rfc822, 34) == 2) {
- strcpy(name, rfc822);
- while ((strlen(name) > 0) && (name[0] != 34)) {
- strcpy(&name[0], &name[1]);
- }
- strcpy(&name[0], &name[1]);
- for (a = 0; a < strlen(name); ++a)
- if (name[a] == 34)
- name[a] = 0;
- }
- /* extract user id */
- strcpy(user, rfc822);
-
- /* first get rid of anything in parens */
- for (a = 0; a < strlen(user); ++a)
- if (user[a] == '(') {
- do {
- strcpy(&user[a], &user[a + 1]);
- } while ((strlen(user) > 0) && (user[a] != ')'));
- strcpy(&user[a], &user[a + 1]);
- }
- /* if there's a set of angle brackets, strip it down to that */
- if ((haschar(user, '<') == 1) && (haschar(user, '>') == 1)) {
- while ((strlen(user) > 0) && (user[0] != '<')) {
- strcpy(&user[0], &user[1]);
- }
- strcpy(&user[0], &user[1]);
- for (a = 0; a < strlen(user); ++a)
- if (user[a] == '>')
- user[a] = 0;
- }
- /* strip anything to the left of a bang */
- while ((strlen(user) > 0) && (haschar(user, '!') > 0))
- strcpy(user, &user[1]);
-
- /* and anything to the right of a @ or % */
- for (a = 0; a < strlen(user); ++a) {
- if (user[a] == '@')
- user[a] = 0;
- if (user[a] == '%')
- user[a] = 0;
- }
-
-
-
- /* extract node name */
- strcpy(node, rfc822);
-
- /* first get rid of anything in parens */
- for (a = 0; a < strlen(node); ++a)
- if (node[a] == '(') {
- do {
- strcpy(&node[a], &node[a + 1]);
- } while ((strlen(node) > 0) && (node[a] != ')'));
- strcpy(&node[a], &node[a + 1]);
- }
- /* if there's a set of angle brackets, strip it down to that */
- if ((haschar(node, '<') == 1) && (haschar(node, '>') == 1)) {
- while ((strlen(node) > 0) && (node[0] != '<')) {
- strcpy(&node[0], &node[1]);
- }
- strcpy(&node[0], &node[1]);
- for (a = 0; a < strlen(node); ++a)
- if (node[a] == '>')
- node[a] = 0;
- }
- /* strip anything to the left of a @ */
- while ((strlen(node) > 0) && (haschar(node, '@') > 0))
- strcpy(node, &node[1]);
-
- /* strip anything to the left of a % */
- while ((strlen(node) > 0) && (haschar(node, '%') > 0))
- strcpy(node, &node[1]);
-
- /* reduce multiple system bang paths to node!user */
- while ((strlen(node) > 0) && (haschar(node, '!') > 1))
- strcpy(node, &node[1]);
-
- /* now get rid of the user portion of a node!user string */
- for (a = 0; a < strlen(node); ++a)
- if (node[a] == '!')
- node[a] = 0;
-
-
-
- /* strip leading and trailing spaces in all strings */
- striplt(user);
- striplt(node);
- striplt(name);
-}
-
-/*
- * Copy line by line, ending at EOF or a "."
- */
-void loopcopy(FILE * to, FILE * from)
-{
- char buf[1024];
- char *r;
-
- while (1) {
- r = fgets(buf, sizeof(buf), from);
- if (r == NULL)
- return;
- strip_trailing_whitespace(buf);
- if (!strcmp(buf, "."))
- return;
- fprintf(to, "%s\n", buf);
- }
-}
-
-
-
-/*
- * Try to extract a numeric message ID
- */
-long extract_msg_id(char *id_string) {
- long msgid = 0L;
- int i, j;
- char buf[256];
-
- strncpy(buf, id_string, sizeof buf);
- id_string[255] = 0;
-
- for (i=0; i<strlen(buf); ++i) {
- if (buf[i]=='<') {
- strcpy(buf, &buf[i]);
- for (j=0; j<strlen(buf); ++j)
- if (buf[j]=='>') buf[j]=0;
- }
- }
-
- msgid = atol(buf);
- if (msgid) return(msgid);
-
- for (i=0; i<strlen(buf); ++i) {
- if (!isdigit(buf[i])) {
- strcpy(&buf[i], &buf[i+1]);
- i = 0;
- }
- }
-
- msgid = atol(buf);
- return(msgid);
-}
-
-
-/*
- * pipe message through netproc
- */
-void do_citmail(char recp[], int dtype)
-{
-
- time_t now;
- FILE *temp;
- int a;
- int format_type = 0;
- char buf[128];
- char from[512];
- char userbuf[256];
- char frombuf[256];
- char nodebuf[256];
- char destsys[256];
- char subject[256];
- long message_id = 0L;
- char targetroom[256];
- char content_type[256];
- char *extra_headers = NULL;
-
-
- if (dtype == DELIVER_REMOTE) {
-
- /* get the Citadel node name out of the path */
- strncpy(destsys, recp, sizeof(destsys));
- for (a = 0; a < strlen(destsys); ++a) {
- if ((destsys[a] == '!') || (destsys[a] == '.')) {
- destsys[a] = 0;
- }
- }
-
- /* chop the system name out, so we're left with a user */
- while (haschar(recp, '!'))
- strcpy(recp, &recp[1]);
- }
- /* Convert underscores to spaces */
- for (a = 0; a < strlen(recp); ++a)
- if (recp[a] == '_')
- recp[a] = ' ';
-
- /* Are we delivering to a room instead of a user? */
- if (!strncasecmp(recp, "room ", 5)) {
- strcpy(targetroom, &recp[5]);
- strcpy(recp, "");
- } else {
- strcpy(targetroom, MAILROOM);
- }
-
- time(&now);
- snprintf(from, sizeof from, "postmaster@%s", config.c_nodename);
-
- snprintf(buf, sizeof buf, "./network/spoolin/citmail.%d", getpid());
- temp = fopen(buf, "w");
-
- strcpy(subject, "");
- strcpy(nodebuf, config.c_nodename);
- strcpy(content_type, "text/plain");
-
- do {
- if (fgets(buf, 128, stdin) == NULL)
- strcpy(buf, ".");
- strip_trailing_whitespace(buf);
-
- if (!strncasecmp(buf, "Subject: ", 9))
- strcpy(subject, &buf[9]);
- else if (!strncasecmp(buf, "Date: ", 6))
- now = conv_date(&buf[6]);
- else if (!strncasecmp(buf, "From: ", 6))
- strcpy(from, &buf[6]);
- else if (!strncasecmp(buf, "Message-ID: ", 12))
- message_id = extract_msg_id(&buf[12]);
- else if (!strncasecmp(buf, "Content-type: ", 14))
- strcpy(content_type, &buf[14]);
- else if (!strncasecmp(buf, "From ", 5)) { /* ignore */
- } else {
- if (extra_headers == NULL) {
- extra_headers = malloc(strlen(buf) + 2);
- strcpy(extra_headers, "");
- } else {
- extra_headers = realloc(extra_headers,
- (strlen(extra_headers) + strlen(buf) + 2));
- }
- strcat(extra_headers, buf);
- strcat(extra_headers, "\n");
- }
- } while ((strcmp(buf, ".")) && (strcmp(buf, "")));
-
- process_rfc822_addr(from, userbuf, nodebuf, frombuf);
-
- if (!strncasecmp(content_type, "text/plain", 10))
- format_type = 1; /* plain ASCII message */
- else
- format_type = 4; /* MIME message */
-
- /* now convert it to Citadel format */
-
- /* Header bytes */
- putc(255, temp); /* 0xFF = start-of-message byte */
- putc(MES_NORMAL, temp); /* Non-anonymous message */
- putc(format_type, temp); /* Format type */
-
- /* Origination */
- fprintf(temp, "P%s@%s%c", userbuf, nodebuf, 0);
- if (message_id)
- fprintf(temp, "I%ld%c", message_id, 0);
- fprintf(temp, "T%ld%c", (long)now, 0);
- fprintf(temp, "A%s%c", userbuf, 0);
-
- /* Destination */
- if (strlen(targetroom) > 0) {
- fprintf(temp, "O%s%c", targetroom, 0);
- } else {
- fprintf(temp, "O%s%c", MAILROOM, 0);
- }
-
- fprintf(temp, "N%s%c", nodebuf, 0);
- fprintf(temp, "H%s%c", frombuf, 0);
- if (dtype == DELIVER_REMOTE) {
- fprintf(temp, "D%s%c", destsys, 0);
- }
- if (strlen(recp) > 0) {
- fprintf(temp, "R%s%c", recp, 0);
- }
- /* Subject and text */
- if (strlen(subject) > 0) {
- fprintf(temp, "U%s%c", subject, 0);
- }
- putc('M', temp);
- if (format_type == 4) {
- fprintf(temp, "Content-type: %s\n", content_type);
- if (extra_headers != NULL)
- fprintf(temp, "%s", extra_headers);
- fprintf(temp, "\n");
- }
- if (extra_headers != NULL)
- free(extra_headers);
- if (strcmp(buf, "."))
- loopcopy(temp, stdin);
- putc(0, temp);
- fclose(temp);
-}
-
-
-void do_uudecode(char *target)
-{
- static char buf[1024];
- FILE *fp;
-
- snprintf(buf, sizeof buf, "cd %s; uudecode", target);
-
- fp = popen(buf, "w");
- if (fp == NULL)
- return;
- while (fgets(buf, 1024, stdin) != NULL) {
- fprintf(fp, "%s", buf);
- }
- pclose(fp);
-
-}
-
-int alias(char *name)
-{
- FILE *fp;
- int a;
- char abuf[256];
-
- fp = fopen(ALIASES, "r");
- if (fp == NULL) {
- syslog(LOG_ERR, "cannot open %s: %s", ALIASES, strerror(errno));
- return (2);
- }
- while (fgets(abuf, 256, fp) != NULL) {
- strip_trailing_whitespace(abuf);
- for (a = 0; a < strlen(abuf); ++a) {
- if (abuf[a] == ',') {
- abuf[a] = 0;
- if (!strcasecmp(name, abuf)) {
- strcpy(name, &abuf[a + 1]);
- }
- }
- }
- }
- fclose(fp);
- return (0);
-}
-
-
-void deliver(char recp[], int is_test, int deliver_to_ignet)
-{
-
- /* various ways we can deliver mail... */
-
- if (deliver_to_ignet) {
- syslog(LOG_NOTICE, "to Citadel network user %s", recp);
- if (is_test == 0)
- do_citmail(recp, DELIVER_REMOTE);
- } else if (!strcmp(recp, "uudecode")) {
- syslog(LOG_NOTICE, "uudecoding to bit bucket directory");
- if (is_test == 0)
- do_uudecode(config.c_bucket_dir);
- } else if (!strcmp(recp, "cit86net")) {
- syslog(LOG_NOTICE, "uudecoding to Cit86net spool");
- if (is_test == 0) {
- do_uudecode(CIT86NET);
- system("exec ./BatchTranslate86");
- }
- } else if (!strcmp(recp, "null")) {
- syslog(LOG_NOTICE, "zapping nulled message");
- } else {
- /* Otherwise, the user is local (or an unknown name was
- * specified, in which case we let netproc handle the bounce)
- */
- syslog(LOG_NOTICE, "to Citadel recipient %s", recp);
- if (is_test == 0)
- do_citmail(recp, DELIVER_LOCAL);
- }
-
-}
-
-
-
-int main(int argc, char **argv)
-{
- int is_test = 0;
- int deliver_to_ignet = 0;
- static char recp[1024], buf[1024];
- static char user[1024], node[1024], name[1024];
- int a;
-
- openlog("citmail", LOG_PID, LOG_USER);
- get_config();
- LoadInternetConfig();
-
- if (!strcmp(argv[1], "-t")) {
- is_test = 1;
- syslog(LOG_NOTICE, "test mode - will not deliver");
- }
- if (is_test == 0) {
- strcpy(recp, argv[1]);
- } else {
- strcpy(recp, argv[2]);
- }
-
-/*** Non-SMTP delivery mode ***/
- syslog(LOG_NOTICE, "recp: %s", recp);
- for (a = 0; a < 2; ++a) {
- alias(recp);
- }
-
- /* did we alias it back to a remote address? */
- if ((haschar(recp, '%'))
- || (haschar(recp, '@'))
- || (haschar(recp, '!'))) {
-
- process_rfc822_addr(recp, user, node, name);
- host_alias(node);
-
- /* If there are dots, it's an Internet host, so feed it
- * back to an external mail transport agent such as sendmail.
- */
- if (haschar(node, '.')) {
- snprintf(buf, sizeof buf, SENDMAIL, recp);
- system(buf);
- exit(0);
- }
- /* Otherwise, we're dealing with Citadel mail. */
- else {
- snprintf(recp, sizeof recp, "%s!%s", node, user);
- deliver_to_ignet = 1;
- }
-
- }
- deliver(recp, is_test, deliver_to_ignet);
-
- if (RUN_NETPROC) {
- syslog(LOG_NOTICE, "running netproc");
- if (system("/bin/true") != 0) {
- syslog(LOG_ERR, "netproc failed: %s", strerror(errno));
- }
- } else {
- syslog(LOG_NOTICE, "skipping netproc");
- }
- exit(0);
-}
projects / citadel.git / blobdiff