X-Git-Url: https://code.citadel.org/?a=blobdiff_plain;f=citadel%2Fcitmail.c;h=ff0ea65864db82088f462a841ec03158ea337669;hb=74ab7475c17ca1f2c3a675c0bb6af77ca2e15fe3;hp=fcaf20a263c1caf57b0a469066ef1c30fa6a1835;hpb=f8e5f597f68a3abd166c80b3b088cdb20e3418da;p=citadel.git diff --git a/citadel/citmail.c b/citadel/citmail.c index fcaf20a26..ff0ea6586 100644 --- a/citadel/citmail.c +++ b/citadel/citmail.c @@ -1,572 +1,296 @@ /* - * 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. + * + * Completely reworked version of "citmail" + * This program attempts to act like a local MDA if you're using sendmail or + * some other non-Citadel MTA. It basically just forwards the message to + * the Citadel SMTP listener on some non-standard port. * - * Usage: - * - * citmail - Deliver a message - * citmail -t - Address test mode (will not deliver) + * $Id$ * */ #include "sysdep.h" #include #include -#include -#include #include +#include +#include +#include +#include +#include +#include +#include #include -#include #include #include -#include -#include +#include #include "citadel.h" -#include "config.h" -#include "internetmail.h" +#include "citadel_decls.h" +#include "ipc.h" +#ifndef HAVE_SNPRINTF +#include "snprintf.h" +#endif +#ifndef INADDR_NONE +#define INADDR_NONE 0xffffffff +#endif -extern time_t parsedate(char *p); +int serv_sock; -/* message delivery classes */ -enum { - DELIVER_LOCAL, - DELIVER_REMOTE, - DELIVER_INTERNET, - DELIVER_CCITADEL -}; - +void strip_trailing_nonprint(char *buf) +{ + while ( (strlen(buf)>0) && (!isprint(buf[strlen(buf) - 1])) ) + buf[strlen(buf) - 1] = 0; +} -#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; -#ifndef HAVE_STRERROR -/* - * replacement strerror() for systems that don't have it - */ -char *strerror(int e) +void timeout(int signum) { - static char buf[32]; - - snprintf(buf, sizeof buf, "errno = %d", e); - return (buf); + exit(signum); } -#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) +int connectsock(char *host, char *service, char *protocol) { - while (isspace(buf[strlen(buf) - 1])) - buf[strlen(buf) - 1] = 0; -} + struct hostent *phe; + struct servent *pse; + struct protoent *ppe; + struct sockaddr_in sin; + int s, type; + + memset(&sin, 0, sizeof(sin)); + sin.sin_family = AF_INET; + + pse = getservbyname(service, protocol); + if (pse) { + sin.sin_port = pse->s_port; + } else if ((sin.sin_port = htons((u_short) atoi(service))) == 0) { + fprintf(stderr, "Can't get %s service entry: %s\n", + service, strerror(errno)); + exit(3); + } + phe = gethostbyname(host); + if (phe) { + memcpy(&sin.sin_addr, phe->h_addr, phe->h_length); + } else if ((sin.sin_addr.s_addr = inet_addr(host)) == INADDR_NONE) { + fprintf(stderr, "Can't get %s host entry: %s\n", + host, strerror(errno)); + exit(3); + } + if ((ppe = getprotobyname(protocol)) == 0) { + fprintf(stderr, "Can't get %s protocol entry: %s\n", + protocol, strerror(errno)); + exit(3); + } + if (!strcmp(protocol, "udp")) { + type = SOCK_DGRAM; + } else { + type = SOCK_STREAM; + } -/* 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; -} + s = socket(PF_INET, type, ppe->p_proto); + if (s < 0) { + fprintf(stderr, "Can't create socket: %s\n", strerror(errno)); + exit(3); + } + signal(SIGALRM, timeout); + alarm(30); + + if (connect(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) { + fprintf(stderr, "can't connect to %s.%s: %s\n", + host, service, strerror(errno)); + exit(3); + } + alarm(0); + signal(SIGALRM, SIG_IGN); + return (s); +} /* - * Check to see if a given FQDN really maps to a Citadel network node + * convert service and host entries into a six-byte numeric in the format + * expected by a SOCKS v4 server */ -void host_alias(char host[]) +void numericize(char *buf, char *host, char *service, char *protocol) { - - 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; + struct hostent *phe; + struct servent *pse; + struct sockaddr_in sin; + + memset(&sin, 0, sizeof(sin)); + sin.sin_family = AF_INET; + + pse = getservbyname(service, protocol); + if (pse) { + sin.sin_port = pse->s_port; + } else if ((sin.sin_port = htons((u_short) atoi(service))) == 0) { + fprintf(stderr, "Can't get %s service entry: %s\n", + service, strerror(errno)); + exit(3); } - /* 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; - } + buf[1] = (((sin.sin_port) & 0xFF00) >> 8); + buf[0] = ((sin.sin_port) & 0x00FF); + + phe = gethostbyname(host); + if (phe) { + memcpy(&sin.sin_addr, phe->h_addr, phe->h_length); + } else if ((sin.sin_addr.s_addr = inet_addr(host)) == INADDR_NONE) { + fprintf(stderr, "Can't get %s host entry: %s\n", + host, strerror(errno)); + exit(3); } - - /* Otherwise, do nothing... */ + buf[5] = ((sin.sin_addr.s_addr) & 0xFF000000) >> 24; + buf[4] = ((sin.sin_addr.s_addr) & 0x00FF0000) >> 16; + buf[3] = ((sin.sin_addr.s_addr) & 0x0000FF00) >> 8; + buf[2] = ((sin.sin_addr.s_addr) & 0x000000FF); } - - /* - * Split an RFC822-style address into userid, host, and full name + * input binary data from socket */ -void process_rfc822_addr(char *rfc822, char *user, char *node, char *name) +void serv_read(char *buf, int bytes) { - int a; - - /* extract full name - first, it's From minus */ - 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; - } + int len, rlen; - - - /* 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]); + len = 0; + while (len < bytes) { + rlen = read(serv_sock, &buf[len], bytes - len); + if (rlen < 1) { + return; } - strcpy(&node[0], &node[1]); - for (a = 0; a < strlen(node); ++a) - if (node[a] == '>') - node[a] = 0; + len = len + rlen; } - /* 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 "." + * send binary to server */ -void loopcopy(FILE * to, FILE * from) +void serv_write(char *buf, int nbytes) { - char buf[1024]; - char *r; - - while (1) { - r = fgets(buf, sizeof(buf), from); - if (r == NULL) - return; - strip_trailing_whitespace(buf); - if (!strcmp(buf, ".")) + int bytes_written = 0; + int retval; + while (bytes_written < nbytes) { + retval = write(serv_sock, &buf[bytes_written], + nbytes - bytes_written); + if (retval < 1) { return; - fprintf(to, "%s\n", buf); + } + bytes_written = bytes_written + retval; } } /* - * pipe message through netproc + * input string from socket - implemented in terms of serv_read() */ -void do_citmail(char recp[], int dtype) +void serv_gets(char *buf) { - - 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]); + int i; + + /* Read one character at a time. + */ + for (i = 0;; i++) { + serv_read(&buf[i], 1); + if (buf[i] == '\n' || i == 255) + break; } - /* 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 = parsedate(&buf[6]); - if (now < 0L) now = time(NULL); - } - else if (!strncasecmp(buf, "From: ", 6)) - strcpy(from, &buf[6]); - 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 */ + /* If we got a long line, discard characters until the newline. + */ + if (i == 255) + while (buf[i] != '\n') + serv_read(&buf[i], 1); - /* 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); + /* Strip all trailing nonprintables (crlf) + */ + buf[i] = 0; + strip_trailing_nonprint(buf); } -void do_uudecode(char *target) +/* + * send line to server - implemented in terms of serv_write() + */ +void serv_puts(char *buf) { - 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); - + /* printf("< %s\n", buf); */ + serv_write(buf, strlen(buf)); + serv_write("\n", 1); } -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); - } +void cleanup(int exitcode) { + char buf[1024]; + serv_puts("QUIT"); + serv_gets(buf); + fprintf(stderr, "%s\n", buf); + exit(exitcode); } -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; - } +int main(int argc, char **argv) { + char buf[1024]; + char fromline[1024]; + FILE *fp; + fp = tmpfile(); + if (fp == NULL) return(errno); + sprintf(fromline, "From: someone@somewhere.org"); + while (fgets(buf, 1024, stdin) != NULL) { + fprintf(fp, "%s", buf); + if (!strncasecmp(buf, "From:", 5)) strcpy(fromline, buf); } - 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"); + strip_trailing_nonprint(fromline); + + sprintf(buf, "%d", SMTP_PORT); + serv_sock = connectsock("localhost", buf, "tcp"); + serv_gets(buf); + fprintf(stderr, "%s\n", buf); + if (buf[0]!='2') cleanup(1); + + serv_puts("HELO localhost"); + serv_gets(buf); + fprintf(stderr, "%s\n", buf); + if (buf[0]!='2') cleanup(1); + + sprintf(buf, "MAIL %s", fromline); + serv_puts(buf); + serv_gets(buf); + fprintf(stderr, "%s\n", buf); + if (buf[0]!='2') cleanup(1); + + sprintf(buf, "RCPT To: %s", argv[1]); + serv_puts(buf); + serv_gets(buf); + fprintf(stderr, "%s\n", buf); + if (buf[0]!='2') cleanup(1); + + serv_puts("DATA"); + serv_gets(buf); + fprintf(stderr, "%s\n", buf); + if (buf[0]!='3') cleanup(1); + + rewind(fp); + while (fgets(buf, sizeof buf, fp) != NULL) { + strip_trailing_nonprint(buf); + serv_puts(buf); } - exit(0); + serv_puts("."); + serv_gets(buf); + fprintf(stderr, "%s\n", buf); + if (buf[0]!='2') cleanup(1); + else cleanup(0); + return(0); }