/*
* $Id$
*
- * An implementation of RFC821 (Simple Mail Transfer Protocol) for the
- * Citadel system.
+ * This module is an SMTP and ESMTP implementation for the Citadel system.
+ * It is compliant with all of the following:
+ *
+ * RFC 821 - Simple Mail Transfer Protocol
+ * RFC 876 - Survey of SMTP Implementations
+ * RFC 1047 - Duplicate messages and SMTP
+ * RFC 1854 - command pipelining
+ * RFC 1869 - Extended Simple Mail Transfer Protocol
+ * RFC 1870 - SMTP Service Extension for Message Size Declaration
+ * RFC 1893 - Enhanced Mail System Status Codes
+ * RFC 2033 - Local Mail Transfer Protocol
+ * RFC 2034 - SMTP Service Extension for Returning Enhanced Error Codes
+ * RFC 2197 - SMTP Service Extension for Command Pipelining
+ * RFC 2487 - SMTP Service Extension for Secure SMTP over TLS
+ * RFC 2554 - SMTP Service Extension for Authentication
+ * RFC 2821 - Simple Mail Transfer Protocol
+ * RFC 2822 - Internet Message Format
+ * RFC 2920 - SMTP Service Extension for Command Pipelining
*
*/
#include <pwd.h>
#include <errno.h>
#include <sys/types.h>
+#include <syslog.h>
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
#include "clientsocket.h"
#include "locate_host.h"
+#ifdef HAVE_OPENSSL
+#include "serv_crypto.h"
+#endif
+
+
#ifndef HAVE_SNPRINTF
#include "snprintf.h"
struct citsmtp { /* Information about the current session */
int command_state;
char helo_node[SIZ];
- struct user vrfy_buffer;
+ struct ctdluser vrfy_buffer;
int vrfy_count;
char vrfy_match[SIZ];
char from[SIZ];
char recipients[SIZ];
int number_of_recipients;
- int number_of_rooms;
int delivery_mode;
int message_originated_locally;
+ int is_lmtp;
+ int is_unfiltered;
+ int is_msa;
};
enum { /* Command states for login authentication */
smtp_deliver_remote
};
-#define SMTP ((struct citsmtp *)CtdlGetUserData(SYM_SMTP))
-#define SMTP_RECPS ((char *)CtdlGetUserData(SYM_SMTP_RECPS))
-#define SMTP_ROOMS ((char *)CtdlGetUserData(SYM_SMTP_ROOMS))
+#define SMTP CC->SMTP
+#define SMTP_RECPS CC->SMTP_RECPS
+#define SMTP_ROOMS CC->SMTP_ROOMS
-long SYM_SMTP;
-long SYM_SMTP_RECPS;
-long SYM_SMTP_ROOMS;
int run_queue_now = 0; /* Set to 1 to ignore SMTP send retry times */
/*****************************************************************************/
-
-
/*
* Here's where our SMTP session begins its happy day.
*/
strcpy(CC->cs_clientname, "SMTP session");
CC->internal_pgm = 1;
CC->cs_flags |= CS_STEALTH;
- CtdlAllocUserData(SYM_SMTP, sizeof(struct citsmtp));
- CtdlAllocUserData(SYM_SMTP_RECPS, SIZ);
- CtdlAllocUserData(SYM_SMTP_ROOMS, SIZ);
- snprintf(SMTP_RECPS, SIZ, "%s", "");
- snprintf(SMTP_ROOMS, SIZ, "%s", "");
+ SMTP = malloc(sizeof(struct citsmtp));
+ SMTP_RECPS = malloc(SIZ);
+ SMTP_ROOMS = malloc(SIZ);
+ memset(SMTP, 0, sizeof(struct citsmtp));
+ memset(SMTP_RECPS, 0, SIZ);
+ memset(SMTP_ROOMS, 0, SIZ);
+
+ cprintf("220 %s ESMTP Citadel server ready.\r\n", config.c_fqdn);
+}
+
+
+/*
+ * SMTPS is just like SMTP, except it goes crypto right away.
+ */
+#ifdef HAVE_OPENSSL
+void smtps_greeting(void) {
+ CtdlStartTLS(NULL, NULL, NULL);
+ smtp_greeting();
+}
+#endif
+
- cprintf("220 %s ESMTP Citadel/UX server ready.\r\n", config.c_fqdn);
+/*
+ * SMTP MSA port requires authentication.
+ */
+void smtp_msa_greeting(void) {
+ smtp_greeting();
+ SMTP->is_msa = 1;
+}
+
+
+/*
+ * LMTP is like SMTP but with some extra bonus footage added.
+ */
+void lmtp_greeting(void) {
+ smtp_greeting();
+ SMTP->is_lmtp = 1;
+}
+
+
+/*
+ * We also have an unfiltered LMTP socket that bypasses spam filters.
+ */
+void lmtp_unfiltered_greeting(void) {
+ smtp_greeting();
+ SMTP->is_lmtp = 1;
+ SMTP->is_unfiltered = 1;
+}
+
+
+/*
+ * Login greeting common to all auth methods
+ */
+void smtp_auth_greeting(void) {
+ cprintf("235 2.0.0 Hello, %s\r\n", CC->user.fullname);
+ lprintf(CTDL_NOTICE, "SMTP authenticated %s\n", CC->user.fullname);
+ CC->internal_pgm = 0;
+ CC->cs_flags &= ~CS_STEALTH;
}
/*
* Implement HELO and EHLO commands.
+ *
+ * which_command: 0=HELO, 1=EHLO, 2=LHLO
*/
-void smtp_hello(char *argbuf, int is_esmtp) {
+void smtp_hello(char *argbuf, int which_command) {
safestrncpy(SMTP->helo_node, argbuf, sizeof SMTP->helo_node);
- if (!is_esmtp) {
- cprintf("250 Greetings and joyous salutations.\r\n");
+ if ( (which_command != 2) && (SMTP->is_lmtp) ) {
+ cprintf("500 Only LHLO is allowed when running LMTP\r\n");
+ return;
+ }
+
+ if ( (which_command == 2) && (SMTP->is_lmtp == 0) ) {
+ cprintf("500 LHLO is only allowed when running LMTP\r\n");
+ return;
+ }
+
+ if (which_command == 0) {
+ cprintf("250 Hello %s (%s [%s])\r\n",
+ SMTP->helo_node,
+ CC->cs_host,
+ CC->cs_addr
+ );
}
else {
- cprintf("250-Greetings and joyous salutations.\r\n");
+ if (which_command == 1) {
+ cprintf("250-Hello %s (%s [%s])\r\n",
+ SMTP->helo_node,
+ CC->cs_host,
+ CC->cs_addr
+ );
+ }
+ else {
+ cprintf("250-Greetings and joyous salutations.\r\n");
+ }
cprintf("250-HELP\r\n");
cprintf("250-SIZE %ld\r\n", config.c_maxmsglen);
+
+#ifdef HAVE_OPENSSL
+
+ /* Only offer the PIPELINING command if TLS is inactive,
+ * because of flow control issues. Also, avoid offering TLS
+ * if TLS is already active. Finally, we only offer TLS on
+ * the SMTP-MSA port, not on the SMTP-MTA port, due to
+ * questionable reliability of TLS in certain sending MTA's.
+ */
+ if ( (!CC->redirect_ssl) && (SMTP->is_msa) ) {
+ cprintf("250-PIPELINING\r\n");
+ cprintf("250-STARTTLS\r\n");
+ }
+
+#else /* HAVE_OPENSSL */
+
+ /* Non SSL enabled server, so always offer PIPELINING. */
cprintf("250-PIPELINING\r\n");
- cprintf("250-AUTH=LOGIN\r\n");
+
+#endif /* HAVE_OPENSSL */
+
+ cprintf("250-AUTH LOGIN PLAIN\r\n");
+ cprintf("250-AUTH=LOGIN PLAIN\r\n");
+
cprintf("250 ENHANCEDSTATUSCODES\r\n");
}
}
+
/*
* Implement HELP command.
*/
char username[SIZ];
CtdlDecodeBase64(username, argbuf, SIZ);
- lprintf(9, "Trying <%s>\n", username);
+ /* lprintf(CTDL_DEBUG, "Trying <%s>\n", username); */
if (CtdlLoginExistingUser(username) == login_ok) {
CtdlEncodeBase64(buf, "Password:", 9);
cprintf("334 %s\r\n", buf);
char password[SIZ];
CtdlDecodeBase64(password, argbuf, SIZ);
- lprintf(9, "Trying <%s>\n", password);
+ /* lprintf(CTDL_DEBUG, "Trying <%s>\n", password); */
if (CtdlTryPassword(password) == pass_ok) {
- cprintf("235 2.0.0 Hello, %s\r\n", CC->user.fullname);
- lprintf(9, "SMTP authenticated login successful\n");
- CC->internal_pgm = 0;
- CC->cs_flags &= ~CS_STEALTH;
+ smtp_auth_greeting();
}
else {
- cprintf("500 5.7.0 Authentication failed.\r\n");
+ cprintf("535 5.7.0 Authentication failed.\r\n");
}
SMTP->command_state = smtp_command;
}
*
*/
void smtp_auth(char *argbuf) {
- char buf[SIZ];
+ char username_prompt[64];
+ char method[64];
+ char encoded_authstring[1024];
+ char decoded_authstring[1024];
+ char ident[256];
+ char user[256];
+ char pass[256];
+
+ if (CC->logged_in) {
+ cprintf("504 5.7.4 Already logged in.\r\n");
+ return;
+ }
- if (strncasecmp(argbuf, "login", 5) ) {
- cprintf("550 5.7.4 We only support LOGIN authentication.\r\n");
+ extract_token(method, argbuf, 0, ' ', sizeof method);
+
+ if (!strncasecmp(method, "login", 5) ) {
+ if (strlen(argbuf) >= 7) {
+ smtp_get_user(&argbuf[6]);
+ }
+ else {
+ CtdlEncodeBase64(username_prompt, "Username:", 9);
+ cprintf("334 %s\r\n", username_prompt);
+ SMTP->command_state = smtp_user;
+ }
return;
}
- if (strlen(argbuf) >= 7) {
- smtp_get_user(&argbuf[6]);
+ if (!strncasecmp(method, "plain", 5) ) {
+ extract_token(encoded_authstring, argbuf, 1, ' ', sizeof encoded_authstring);
+ CtdlDecodeBase64(decoded_authstring,
+ encoded_authstring,
+ strlen(encoded_authstring) );
+ safestrncpy(ident, decoded_authstring, sizeof ident);
+ safestrncpy(user, &decoded_authstring[strlen(ident) + 1], sizeof user);
+ safestrncpy(pass, &decoded_authstring[strlen(ident) + strlen(user) + 2], sizeof pass);
+
+ if (CtdlLoginExistingUser(user) == login_ok) {
+ if (CtdlTryPassword(pass) == pass_ok) {
+ smtp_auth_greeting();
+ return;
+ }
+ }
+ cprintf("504 5.7.4 Authentication failed.\r\n");
}
- else {
- CtdlEncodeBase64(buf, "Username:", 9);
- cprintf("334 %s\r\n", buf);
- SMTP->command_state = smtp_user;
+ if (strncasecmp(method, "login", 5) ) {
+ cprintf("504 5.7.4 Unknown authentication method.\r\n");
+ return;
}
+
}
/*
* Back end for smtp_vrfy() command
*/
-void smtp_vrfy_backend(struct user *us, void *data) {
+void smtp_vrfy_backend(struct ctdluser *us, void *data) {
if (!fuzzy_match(us, SMTP->vrfy_match)) {
++SMTP->vrfy_count;
- memcpy(&SMTP->vrfy_buffer, us, sizeof(struct user));
+ memcpy(&SMTP->vrfy_buffer, us, sizeof(struct ctdluser));
}
}
/*
* Back end for smtp_expn() command
*/
-void smtp_expn_backend(struct user *us, void *data) {
+void smtp_expn_backend(struct ctdluser *us, void *data) {
if (!fuzzy_match(us, SMTP->vrfy_match)) {
}
++SMTP->vrfy_count;
- memcpy(&SMTP->vrfy_buffer, us, sizeof(struct user));
+ memcpy(&SMTP->vrfy_buffer, us, sizeof(struct ctdluser));
}
}
/*
* Implements the RSET (reset state) command.
* Currently this just zeroes out the state buffer. If pointers to data
- * allocated with mallok() are ever placed in the state buffer, we have to
- * be sure to phree() them first!
+ * allocated with malloc() are ever placed in the state buffer, we have to
+ * be sure to free() them first!
+ *
+ * Set do_response to nonzero to output the SMTP RSET response code.
*/
-void smtp_rset(void) {
+void smtp_rset(int do_response) {
+ int is_lmtp;
+ int is_unfiltered;
+
+ /*
+ * Our entire SMTP state is discarded when a RSET command is issued,
+ * but we need to preserve this one little piece of information, so
+ * we save it for later.
+ */
+ is_lmtp = SMTP->is_lmtp;
+ is_unfiltered = SMTP->is_unfiltered;
+
memset(SMTP, 0, sizeof(struct citsmtp));
/*
* }
*/
- cprintf("250 2.0.0 Zap!\r\n");
+ /*
+ * Reinstate this little piece of information we saved (see above).
+ */
+ SMTP->is_lmtp = is_lmtp;
+ SMTP->is_unfiltered = is_unfiltered;
+
+ if (do_response) {
+ cprintf("250 2.0.0 Zap!\r\n");
+ }
}
/*
strcpy(SMTP->from, &argbuf[5]);
striplt(SMTP->from);
- stripallbut(SMTP->from, '<', '>');
+ if (haschar(SMTP->from, '<') > 0) {
+ stripallbut(SMTP->from, '<', '>');
+ }
/* We used to reject empty sender names, until it was brought to our
* attention that RFC1123 5.2.9 requires that this be allowed. So now
* to be the user's Internet e-mail address as Citadel knows it.
*/
if (CC->logged_in) {
- strcpy(SMTP->from, CC->cs_inet_email);
+ safestrncpy(SMTP->from, CC->cs_inet_email, sizeof SMTP->from);
cprintf("250 2.1.0 Sender ok <%s>\r\n", SMTP->from);
SMTP->message_originated_locally = 1;
return;
}
+ else if (SMTP->is_lmtp) {
+ /* Bypass forgery checking for LMTP */
+ }
+
/* Otherwise, make sure outsiders aren't trying to forge mail from
- * this system.
+ * this system (unless, of course, c_allow_spoofing is enabled)
*/
- else {
+ else if (config.c_allow_spoofing == 0) {
process_rfc822_addr(SMTP->from, user, node, name);
if (CtdlHostAlias(node) != hostalias_nomatch) {
cprintf("550 5.1.8 "
return;
}
+ if ( (SMTP->is_msa) && (!CC->logged_in) ) {
+ cprintf("550 5.1.8 "
+ "You must log in to send mail on this port.\r\n");
+ strcpy(SMTP->from, "");
+ return;
+ }
+
strcpy(recp, &argbuf[3]);
striplt(recp);
stripallbut(recp, '<', '>');
}
/* RBL check */
- if ( (!CC->logged_in) && (!CC->is_local_socket) ) {
+ if ( (!CC->logged_in)
+ && (!SMTP->is_lmtp) ) {
if (rbl_check(message_to_spammer)) {
cprintf("550 %s\r\n", message_to_spammer);
- /* no need to phree(valid), it's not allocated yet */
+ /* no need to free(valid), it's not allocated yet */
return;
}
}
valid = validate_recipients(recp);
- if (valid->num_error > 0) {
+ if (valid->num_error != 0) {
cprintf("599 5.1.1 Error: %s\r\n", valid->errormsg);
- phree(valid);
+ free(valid);
return;
}
if (valid->num_internet > 0) {
- if (SMTP->message_originated_locally == 0) {
+ if (CC->logged_in) {
+ if (CtdlCheckInternetMailPermission(&CC->user)==0) {
+ cprintf("551 5.7.1 <%s> - you do not have permission to send Internet mail\r\n", recp);
+ free(valid);
+ return;
+ }
+ }
+ }
+
+ if (valid->num_internet > 0) {
+ if ( (SMTP->message_originated_locally == 0)
+ && (SMTP->is_lmtp == 0) ) {
cprintf("551 5.7.1 <%s> - relaying denied\r\n", recp);
- phree(valid);
+ free(valid);
return;
}
}
void smtp_data(void) {
char *body;
struct CtdlMessage *msg;
- long msgnum;
+ long msgnum = (-1L);
char nowstamp[SIZ];
struct recptypes *valid;
int scan_errors;
+ int i;
+ char result[SIZ];
if (strlen(SMTP->from) == 0) {
cprintf("503 5.5.1 Need MAIL command first.\r\n");
cprintf("354 Transmit message now - terminate with '.' by itself\r\n");
datestring(nowstamp, sizeof nowstamp, time(NULL), DATESTRING_RFC822);
- body = mallok(4096);
+ body = malloc(4096);
- /* FIXME
- it should be Received: from %s (real.name.dom [w.x.y.z])
- */
if (body != NULL) snprintf(body, 4096,
- "Received: from %s (%s)\n"
+ "Received: from %s (%s [%s])\n"
" by %s; %s\n",
SMTP->helo_node,
CC->cs_host,
+ CC->cs_addr,
config.c_fqdn,
nowstamp);
return;
}
- lprintf(9, "Converting message...\n");
+ lprintf(CTDL_DEBUG, "Converting message...\n");
msg = convert_internet_message(body);
/* If the user is locally authenticated, FORCE the From: header to
* is read with a Citadel client.
*/
if ( (CC->logged_in) && (config.c_rfc822_strict_from == 0) ) {
- if (msg->cm_fields['A'] != NULL) phree(msg->cm_fields['A']);
- if (msg->cm_fields['N'] != NULL) phree(msg->cm_fields['N']);
- if (msg->cm_fields['H'] != NULL) phree(msg->cm_fields['H']);
- if (msg->cm_fields['F'] != NULL) phree(msg->cm_fields['F']);
- if (msg->cm_fields['O'] != NULL) phree(msg->cm_fields['O']);
- msg->cm_fields['A'] = strdoop(CC->user.fullname);
- msg->cm_fields['N'] = strdoop(config.c_nodename);
- msg->cm_fields['H'] = strdoop(config.c_humannode);
- msg->cm_fields['F'] = strdoop(CC->cs_inet_email);
- msg->cm_fields['O'] = strdoop(MAILROOM);
+ if (msg->cm_fields['A'] != NULL) free(msg->cm_fields['A']);
+ if (msg->cm_fields['N'] != NULL) free(msg->cm_fields['N']);
+ if (msg->cm_fields['H'] != NULL) free(msg->cm_fields['H']);
+ if (msg->cm_fields['F'] != NULL) free(msg->cm_fields['F']);
+ if (msg->cm_fields['O'] != NULL) free(msg->cm_fields['O']);
+ msg->cm_fields['A'] = strdup(CC->user.fullname);
+ msg->cm_fields['N'] = strdup(config.c_nodename);
+ msg->cm_fields['H'] = strdup(config.c_humannode);
+ msg->cm_fields['F'] = strdup(CC->cs_inet_email);
+ msg->cm_fields['O'] = strdup(MAILROOM);
}
/* Submit the message into the Citadel system. */
* submission (such as virus checkers or spam filters), call them now
* and give them an opportunity to reject the message.
*/
- scan_errors = PerformMessageHooks(msg, EVT_SMTPSCAN);
+ if (SMTP->is_unfiltered) {
+ scan_errors = 0;
+ }
+ else {
+ scan_errors = PerformMessageHooks(msg, EVT_SMTPSCAN);
+ }
if (scan_errors > 0) { /* We don't want this message! */
if (msg->cm_fields['0'] == NULL) {
- msg->cm_fields['0'] = strdoop(
+ msg->cm_fields['0'] = strdup(
"5.7.1 Message rejected by filter");
}
- cprintf("550 %s\r\n", msg->cm_fields['0']);
+ sprintf(result, "550 %s\r\n", msg->cm_fields['0']);
}
else { /* Ok, we'll accept this message. */
msgnum = CtdlSubmitMsg(msg, valid, "");
if (msgnum > 0L) {
- cprintf("250 2.0.0 Message accepted.\r\n");
+ sprintf(result, "250 2.0.0 Message accepted.\r\n");
}
else {
- cprintf("550 5.5.0 Internal delivery error\r\n");
+ sprintf(result, "550 5.5.0 Internal delivery error\r\n");
}
}
+ /* For SMTP and ESTMP, just print the result message. For LMTP, we
+ * have to print one result message for each recipient. Since there
+ * is nothing in Citadel which would cause different recipients to
+ * have different results, we can get away with just spitting out the
+ * same message once for each recipient.
+ */
+ if (SMTP->is_lmtp) {
+ for (i=0; i<SMTP->number_of_recipients; ++i) {
+ cprintf("%s", result);
+ }
+ }
+ else {
+ cprintf("%s", result);
+ }
+
+ /* Write something to the syslog (which may or may not be where the
+ * rest of the Citadel logs are going; some sysadmins want LOG_MAIL).
+ */
+ if (enable_syslog) {
+ syslog((LOG_MAIL | LOG_INFO),
+ "%ld: from=<%s>, nrcpts=%d, relay=%s [%s], stat=%s",
+ msgnum,
+ SMTP->from,
+ SMTP->number_of_recipients,
+ CC->cs_host,
+ CC->cs_addr,
+ result
+ );
+ }
+
+ /* Clean up */
CtdlFreeMessage(msg);
- phree(valid);
+ free(valid);
smtp_data_clear(); /* clear out the buffers now */
}
+/*
+ * implements the STARTTLS command (Citadel API version)
+ */
+#ifdef HAVE_OPENSSL
+void smtp_starttls(void)
+{
+ char ok_response[SIZ];
+ char nosup_response[SIZ];
+ char error_response[SIZ];
+
+ sprintf(ok_response,
+ "200 2.0.0 Begin TLS negotiation now\r\n");
+ sprintf(nosup_response,
+ "554 5.7.3 TLS not supported here\r\n");
+ sprintf(error_response,
+ "554 5.7.3 Internal error\r\n");
+ CtdlStartTLS(ok_response, nosup_response, error_response);
+ smtp_rset(0);
+}
+#endif
+
/*
time(&CC->lastcmd);
memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
- if (client_gets(cmdbuf) < 1) {
- lprintf(3, "SMTP socket is broken. Ending session.\n");
+ if (client_getln(cmdbuf, sizeof cmdbuf) < 1) {
+ lprintf(CTDL_CRIT, "Client disconnected: ending session.\n");
CC->kill_me = 1;
return;
}
- lprintf(5, "SMTP: %s\n", cmdbuf);
+ lprintf(CTDL_INFO, "SMTP: %s\n", cmdbuf);
while (strlen(cmdbuf) < 5) strcat(cmdbuf, " ");
- lprintf(9, "CC->logged_in = %d\n", CC->logged_in);
-
if (SMTP->command_state == smtp_user) {
smtp_get_user(cmdbuf);
}
smtp_data();
}
- else if (!strncasecmp(cmdbuf, "EHLO", 4)) {
- smtp_hello(&cmdbuf[5], 1);
- }
-
else if (!strncasecmp(cmdbuf, "EXPN", 4)) {
smtp_expn(&cmdbuf[5]);
}
smtp_hello(&cmdbuf[5], 0);
}
+ else if (!strncasecmp(cmdbuf, "EHLO", 4)) {
+ smtp_hello(&cmdbuf[5], 1);
+ }
+
+ else if (!strncasecmp(cmdbuf, "LHLO", 4)) {
+ smtp_hello(&cmdbuf[5], 2);
+ }
+
else if (!strncasecmp(cmdbuf, "HELP", 4)) {
smtp_help();
}
}
else if (!strncasecmp(cmdbuf, "RSET", 4)) {
- smtp_rset();
+ smtp_rset(1);
}
-
+#ifdef HAVE_OPENSSL
+ else if (!strcasecmp(cmdbuf, "STARTTLS")) {
+ smtp_starttls();
+ }
+#endif
else if (!strncasecmp(cmdbuf, "VRFY", 4)) {
smtp_vrfy(&cmdbuf[5]);
}
cprintf("502 5.0.0 I'm afraid I can't do that.\r\n");
}
+
}
int num_mxhosts;
int mx;
int i;
- char user[SIZ], node[SIZ], name[SIZ];
+ char user[1024], node[1024], name[1024];
char buf[1024];
char mailfrom[1024];
+ char mx_host[256];
+ char mx_port[256];
int lp, rp;
- FILE *msg_fp = NULL;
+ char *msgtext;
+ char *ptr;
size_t msg_size;
- size_t blocksize = 0;
int scan_done;
/* Parse out the host portion of the recipient address */
process_rfc822_addr(addr, user, node, name);
- lprintf(9, "Attempting SMTP delivery to <%s> @ <%s> (%s)\n",
+ lprintf(CTDL_DEBUG, "Attempting SMTP delivery to <%s> @ <%s> (%s)\n",
user, node, name);
- /* Load the message out of the database into a temp file */
- msg_fp = tmpfile();
- if (msg_fp == NULL) {
- *status = 4;
- snprintf(dsn, n, "Error creating temporary file");
- return;
- }
- else {
- CtdlRedirectOutput(msg_fp, -1);
- CtdlOutputMsg(msgnum, MT_RFC822, HEADERS_ALL, 0, 1);
- CtdlRedirectOutput(NULL, -1);
- fseek(msg_fp, 0L, SEEK_END);
- msg_size = ftell(msg_fp);
- }
-
+ /* Load the message out of the database */
+ CC->redirect_buffer = malloc(SIZ);
+ CC->redirect_len = 0;
+ CC->redirect_alloc = SIZ;
+ CtdlOutputMsg(msgnum, MT_RFC822, HEADERS_ALL, 0, 1, NULL);
+ msgtext = CC->redirect_buffer;
+ msg_size = CC->redirect_len;
+ CC->redirect_buffer = NULL;
+ CC->redirect_len = 0;
+ CC->redirect_alloc = 0;
/* Extract something to send later in the 'MAIL From:' command */
strcpy(mailfrom, "");
- rewind(msg_fp);
scan_done = 0;
+ ptr = msgtext;
do {
- if (fgets(buf, sizeof buf, msg_fp)==NULL) scan_done = 1;
+ if (ptr = memreadline(ptr, buf, sizeof buf), *ptr == 0) {
+ scan_done = 1;
+ }
if (!strncasecmp(buf, "From:", 5)) {
safestrncpy(mailfrom, &buf[5], sizeof mailfrom);
striplt(mailfrom);
}
} while (scan_done == 0);
if (strlen(mailfrom)==0) strcpy(mailfrom, "someone@somewhere.org");
+ stripallbut(mailfrom, '<', '>');
/* Figure out what mail exchanger host we have to connect to */
num_mxhosts = getmx(mxhosts, node);
- lprintf(9, "Number of MX hosts for <%s> is %d\n", node, num_mxhosts);
+ lprintf(CTDL_DEBUG, "Number of MX hosts for <%s> is %d\n", node, num_mxhosts);
if (num_mxhosts < 1) {
*status = 5;
snprintf(dsn, SIZ, "No MX hosts found for <%s>", node);
sock = (-1);
for (mx=0; (mx<num_mxhosts && sock < 0); ++mx) {
- extract(buf, mxhosts, mx);
- lprintf(9, "Trying <%s>\n", buf);
- sock = sock_connect(buf, "25", "tcp");
+ extract_token(buf, mxhosts, mx, '|', sizeof buf);
+ extract_token(mx_host, buf, 0, ':', sizeof mx_host);
+ extract_token(mx_port, buf, 1, ':', sizeof mx_port);
+ if (!mx_port[0]) {
+ strcpy(mx_port, "25");
+ }
+ lprintf(CTDL_DEBUG, "Trying %s : %s ...\n", mx_host, mx_port);
+ sock = sock_connect(mx_host, mx_port, "tcp");
snprintf(dsn, SIZ, "Could not connect: %s", strerror(errno));
- if (sock >= 0) lprintf(9, "Connected!\n");
+ if (sock >= 0) lprintf(CTDL_DEBUG, "Connected!\n");
if (sock < 0) snprintf(dsn, SIZ, "%s", strerror(errno));
}
strcpy(dsn, "Connection broken during SMTP conversation");
goto bail;
}
- lprintf(9, "<%s\n", buf);
+ lprintf(CTDL_DEBUG, "<%s\n", buf);
if (buf[0] != '2') {
if (buf[0] == '4') {
*status = 4;
/* Do a HELO command */
snprintf(buf, sizeof buf, "HELO %s\r\n", config.c_fqdn);
- lprintf(9, ">%s", buf);
+ lprintf(CTDL_DEBUG, ">%s", buf);
sock_write(sock, buf, strlen(buf));
if (ml_sock_gets(sock, buf) < 0) {
*status = 4;
strcpy(dsn, "Connection broken during SMTP HELO");
goto bail;
}
- lprintf(9, "<%s\n", buf);
+ lprintf(CTDL_DEBUG, "<%s\n", buf);
if (buf[0] != '2') {
if (buf[0] == '4') {
*status = 4;
}
}
-
/* HELO succeeded, now try the MAIL From: command */
snprintf(buf, sizeof buf, "MAIL From: <%s>\r\n", mailfrom);
- lprintf(9, ">%s", buf);
+ lprintf(CTDL_DEBUG, ">%s", buf);
sock_write(sock, buf, strlen(buf));
if (ml_sock_gets(sock, buf) < 0) {
*status = 4;
strcpy(dsn, "Connection broken during SMTP MAIL");
goto bail;
}
- lprintf(9, "<%s\n", buf);
+ lprintf(CTDL_DEBUG, "<%s\n", buf);
if (buf[0] != '2') {
if (buf[0] == '4') {
*status = 4;
}
}
-
/* MAIL succeeded, now try the RCPT To: command */
- snprintf(buf, sizeof buf, "RCPT To: <%s>\r\n", addr);
- lprintf(9, ">%s", buf);
+ snprintf(buf, sizeof buf, "RCPT To: <%s@%s>\r\n", user, node);
+ lprintf(CTDL_DEBUG, ">%s", buf);
sock_write(sock, buf, strlen(buf));
if (ml_sock_gets(sock, buf) < 0) {
*status = 4;
strcpy(dsn, "Connection broken during SMTP RCPT");
goto bail;
}
- lprintf(9, "<%s\n", buf);
+ lprintf(CTDL_DEBUG, "<%s\n", buf);
if (buf[0] != '2') {
if (buf[0] == '4') {
*status = 4;
}
}
-
/* RCPT succeeded, now try the DATA command */
- lprintf(9, ">DATA\n");
+ lprintf(CTDL_DEBUG, ">DATA\n");
sock_write(sock, "DATA\r\n", 6);
if (ml_sock_gets(sock, buf) < 0) {
*status = 4;
strcpy(dsn, "Connection broken during SMTP DATA");
goto bail;
}
- lprintf(9, "<%s\n", buf);
+ lprintf(CTDL_DEBUG, "<%s\n", buf);
if (buf[0] != '3') {
if (buf[0] == '4') {
*status = 3;
}
/* If we reach this point, the server is expecting data */
- rewind(msg_fp);
- while (msg_size > 0) {
- blocksize = sizeof(buf);
- if (blocksize > msg_size) blocksize = msg_size;
- fread(buf, blocksize, 1, msg_fp);
- sock_write(sock, buf, blocksize);
- msg_size -= blocksize;
- }
- if (buf[blocksize-1] != 10) {
- lprintf(5, "Possible problem: message did not correctly "
- "terminate. (expecting 0x10, got 0x%02x)\n",
- buf[blocksize-1]);
+ sock_write(sock, msgtext, msg_size);
+ if (msgtext[msg_size-1] != 10) {
+ lprintf(CTDL_WARNING, "Possible problem: message did not "
+ "correctly terminate. (expecting 0x10, got 0x%02x)\n",
+ buf[msg_size-1]);
}
sock_write(sock, ".\r\n", 3);
strcpy(dsn, "Connection broken during SMTP message transmit");
goto bail;
}
- lprintf(9, "%s\n", buf);
+ lprintf(CTDL_DEBUG, "%s\n", buf);
if (buf[0] != '2') {
if (buf[0] == '4') {
*status = 4;
safestrncpy(dsn, &buf[4], 1023);
*status = 2;
- lprintf(9, ">QUIT\n");
+ lprintf(CTDL_DEBUG, ">QUIT\n");
sock_write(sock, "QUIT\r\n", 6);
ml_sock_gets(sock, buf);
- lprintf(9, "<%s\n", buf);
+ lprintf(CTDL_DEBUG, "<%s\n", buf);
+ lprintf(CTDL_INFO, "SMTP delivery to <%s> @ <%s> (%s) succeeded\n",
+ user, node, name);
-bail: if (msg_fp != NULL) fclose(msg_fp);
+bail: free(msgtext);
sock_close(sock);
+
+ /* Write something to the syslog (which may or may not be where the
+ * rest of the Citadel logs are going; some sysadmins want LOG_MAIL).
+ */
+ if (enable_syslog) {
+ syslog((LOG_MAIL | LOG_INFO),
+ "%ld: to=<%s>, relay=%s, stat=%s",
+ msgnum,
+ addr,
+ mx_host,
+ dsn
+ );
+ }
+
return;
}
struct recptypes *valid;
int successful_bounce = 0;
- lprintf(9, "smtp_do_bounce() called\n");
+ lprintf(CTDL_DEBUG, "smtp_do_bounce() called\n");
strcpy(bounceto, "");
lines = num_tokens(instr, '\n');
/* See if it's time to give up on delivery of this message */
for (i=0; i<lines; ++i) {
- extract_token(buf, instr, i, '\n');
- extract(key, buf, 0);
- extract(addr, buf, 1);
+ extract_token(buf, instr, i, '\n', sizeof buf);
+ extract_token(key, buf, 0, '|', sizeof key);
+ extract_token(addr, buf, 1, '|', sizeof addr);
if (!strcasecmp(key, "submitted")) {
submitted = atol(addr);
}
- bmsg = (struct CtdlMessage *) mallok(sizeof(struct CtdlMessage));
+ bmsg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
if (bmsg == NULL) return;
memset(bmsg, 0, sizeof(struct CtdlMessage));
bmsg->cm_magic = CTDLMESSAGE_MAGIC;
bmsg->cm_anon_type = MES_NORMAL;
bmsg->cm_format_type = 1;
- bmsg->cm_fields['A'] = strdoop("Citadel");
- bmsg->cm_fields['O'] = strdoop(MAILROOM);
- bmsg->cm_fields['N'] = strdoop(config.c_nodename);
+ bmsg->cm_fields['A'] = strdup("Citadel");
+ bmsg->cm_fields['O'] = strdup(MAILROOM);
+ bmsg->cm_fields['N'] = strdup(config.c_nodename);
+ bmsg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
- if (give_up) bmsg->cm_fields['M'] = strdoop(
+ if (give_up) bmsg->cm_fields['M'] = strdup(
"A message you sent could not be delivered to some or all of its recipients\n"
"due to prolonged unavailability of its destination(s).\n"
"Giving up on the following addresses:\n\n"
);
- else bmsg->cm_fields['M'] = strdoop(
+ else bmsg->cm_fields['M'] = strdup(
"A message you sent could not be delivered to some or all of its recipients.\n"
"The following addresses were undeliverable:\n\n"
);
* Now go through the instructions checking for stuff.
*/
for (i=0; i<lines; ++i) {
- extract_token(buf, instr, i, '\n');
- extract(key, buf, 0);
- extract(addr, buf, 1);
+ extract_token(buf, instr, i, '\n', sizeof buf);
+ extract_token(key, buf, 0, '|', sizeof key);
+ extract_token(addr, buf, 1, '|', sizeof addr);
status = extract_int(buf, 2);
- extract(dsn, buf, 3);
+ extract_token(dsn, buf, 3, '|', sizeof dsn);
bounce_this = 0;
- lprintf(9, "key=<%s> addr=<%s> status=%d dsn=<%s>\n",
+ lprintf(CTDL_DEBUG, "key=<%s> addr=<%s> status=%d dsn=<%s>\n",
key, addr, status, dsn);
if (!strcasecmp(key, "bounceto")) {
++num_bounces;
if (bmsg->cm_fields['M'] == NULL) {
- lprintf(2, "ERROR ... M field is null "
+ lprintf(CTDL_ERR, "ERROR ... M field is null "
"(%s:%d)\n", __FILE__, __LINE__);
}
- bmsg->cm_fields['M'] = reallok(bmsg->cm_fields['M'],
+ bmsg->cm_fields['M'] = realloc(bmsg->cm_fields['M'],
strlen(bmsg->cm_fields['M']) + 1024 );
strcat(bmsg->cm_fields['M'], addr);
strcat(bmsg->cm_fields['M'], ": ");
}
/* Deliver the bounce if there's anything worth mentioning */
- lprintf(9, "num_bounces = %d\n", num_bounces);
+ lprintf(CTDL_DEBUG, "num_bounces = %d\n", num_bounces);
if (num_bounces > 0) {
/* First try the user who sent the message */
- lprintf(9, "bounce to user? <%s>\n", bounceto);
+ lprintf(CTDL_DEBUG, "bounce to user? <%s>\n", bounceto);
if (strlen(bounceto) == 0) {
- lprintf(7, "No bounce address specified\n");
+ lprintf(CTDL_ERR, "No bounce address specified\n");
bounce_msgid = (-1L);
}
/* Free up the memory we used */
if (valid != NULL) {
- phree(valid);
+ free(valid);
}
}
CtdlFreeMessage(bmsg);
- lprintf(9, "Done processing bounces\n");
+ lprintf(CTDL_DEBUG, "Done processing bounces\n");
}
lines = num_tokens(instr, '\n');
for (i=0; i<lines; ++i) {
- extract_token(buf, instr, i, '\n');
- extract(key, buf, 0);
- extract(addr, buf, 1);
+ extract_token(buf, instr, i, '\n', sizeof buf);
+ extract_token(key, buf, 0, '|', sizeof key);
+ extract_token(addr, buf, 1, '|', sizeof addr);
status = extract_int(buf, 2);
- extract(dsn, buf, 3);
+ extract_token(dsn, buf, 3, '|', sizeof dsn);
completed = 0;
time_t last_attempted = 0L;
time_t retry = SMTP_RETRY_INTERVAL;
- lprintf(9, "smtp_do_procmsg(%ld)\n", msgnum);
+ lprintf(CTDL_DEBUG, "smtp_do_procmsg(%ld)\n", msgnum);
- msg = CtdlFetchMessage(msgnum);
+ msg = CtdlFetchMessage(msgnum, 1);
if (msg == NULL) {
- lprintf(3, "SMTP: tried %ld but no such message!\n", msgnum);
+ lprintf(CTDL_ERR, "SMTP: tried %ld but no such message!\n", msgnum);
return;
}
- instr = strdoop(msg->cm_fields['M']);
+ instr = strdup(msg->cm_fields['M']);
CtdlFreeMessage(msg);
/* Strip out the headers amd any other non-instruction line */
lines = num_tokens(instr, '\n');
for (i=0; i<lines; ++i) {
- extract_token(buf, instr, i, '\n');
+ extract_token(buf, instr, i, '\n', sizeof buf);
if (num_tokens(buf, '|') < 2) {
remove_token(instr, i, '\n');
--lines;
/* Learn the message ID and find out about recent delivery attempts */
lines = num_tokens(instr, '\n');
for (i=0; i<lines; ++i) {
- extract_token(buf, instr, i, '\n');
- extract(key, buf, 0);
+ extract_token(buf, instr, i, '\n', sizeof buf);
+ extract_token(key, buf, 0, '|', sizeof key);
if (!strcasecmp(key, "msgid")) {
text_msgid = extract_long(buf, 1);
}
* Postpone delivery if we've already tried recently.
*/
if (((time(NULL) - last_attempted) < retry) && (run_queue_now == 0)) {
- lprintf(7, "Retry time not yet reached.\n");
- phree(instr);
+ lprintf(CTDL_DEBUG, "Retry time not yet reached.\n");
+ free(instr);
return;
}
* Bail out if there's no actual message associated with this
*/
if (text_msgid < 0L) {
- lprintf(3, "SMTP: no 'msgid' directive found!\n");
- phree(instr);
+ lprintf(CTDL_ERR, "SMTP: no 'msgid' directive found!\n");
+ free(instr);
return;
}
*/
lines = num_tokens(instr, '\n');
for (i=0; i<lines; ++i) {
- extract_token(buf, instr, i, '\n');
- extract(key, buf, 0);
- extract(addr, buf, 1);
+ extract_token(buf, instr, i, '\n', sizeof buf);
+ extract_token(key, buf, 0, '|', sizeof key);
+ extract_token(addr, buf, 1, '|', sizeof addr);
status = extract_int(buf, 2);
- extract(dsn, buf, 3);
+ extract_token(dsn, buf, 3, '|', sizeof dsn);
if ( (!strcasecmp(key, "remote"))
&& ((status==0)||(status==3)||(status==4)) ) {
--i;
--lines;
- lprintf(9, "SMTP: Trying <%s>\n", addr);
+ lprintf(CTDL_DEBUG, "SMTP: Trying <%s>\n", addr);
smtp_try(key, addr, &status, dsn, sizeof dsn, text_msgid);
if (status != 2) {
if (results == NULL) {
- results = mallok(1024);
+ results = malloc(1024);
memset(results, 0, 1024);
}
else {
- results = reallok(results,
+ results = realloc(results,
strlen(results) + 1024);
}
snprintf(&results[strlen(results)], 1024,
}
if (results != NULL) {
- instr = reallok(instr, strlen(instr) + strlen(results) + 2);
+ instr = realloc(instr, strlen(instr) + strlen(results) + 2);
strcat(instr, results);
- phree(results);
+ free(results);
}
* message and the message message.
*/
if (incomplete_deliveries_remaining <= 0) {
- CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, msgnum, "");
- CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, text_msgid, "");
+ CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, msgnum, "", 0);
+ CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, text_msgid, "", 0);
}
* instructions and replace with the updated ones.
*/
if (incomplete_deliveries_remaining > 0) {
- CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, msgnum, "");
- msg = mallok(sizeof(struct CtdlMessage));
+ CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, msgnum, "", 0);
+ msg = malloc(sizeof(struct CtdlMessage));
memset(msg, 0, sizeof(struct CtdlMessage));
msg->cm_magic = CTDLMESSAGE_MAGIC;
msg->cm_anon_type = MES_NORMAL;
"attempted|%ld\n"
"retry|%ld\n",
SPOOLMIME, instr, (long)time(NULL), (long)retry );
- phree(instr);
CtdlSubmitMsg(msg, NULL, SMTP_SPOOLOUT_ROOM);
CtdlFreeMessage(msg);
}
+ free(instr);
}
/*
* Go ahead and run the queue
*/
- lprintf(7, "SMTP: processing outbound queue\n");
+ lprintf(CTDL_INFO, "SMTP: processing outbound queue\n");
if (getroom(&CC->room, SMTP_SPOOLOUT_ROOM) != 0) {
- lprintf(3, "Cannot find room <%s>\n", SMTP_SPOOLOUT_ROOM);
+ lprintf(CTDL_ERR, "Cannot find room <%s>\n", SMTP_SPOOLOUT_ROOM);
return;
}
CtdlForEachMessage(MSGS_ALL, 0L,
SPOOLMIME, NULL, smtp_do_procmsg, NULL);
- lprintf(7, "SMTP: queue run completed\n");
+ lprintf(CTDL_INFO, "SMTP: queue run completed\n");
run_queue_now = 0;
doing_queue = 0;
}
/*****************************************************************************/
void cmd_smtp(char *argbuf) {
- char cmd[SIZ];
- char node[SIZ];
- char buf[SIZ];
+ char cmd[64];
+ char node[256];
+ char buf[1024];
int i;
int num_mxhosts;
if (CtdlAccessCheck(ac_aide)) return;
- extract(cmd, argbuf, 0);
+ extract_token(cmd, argbuf, 0, '|', sizeof cmd);
if (!strcasecmp(cmd, "mx")) {
- extract(node, argbuf, 1);
+ extract_token(node, argbuf, 1, '|', sizeof node);
num_mxhosts = getmx(buf, node);
cprintf("%d %d MX hosts listed for %s\n",
LISTING_FOLLOWS, num_mxhosts, node);
for (i=0; i<num_mxhosts; ++i) {
- extract(node, buf, i);
+ extract_token(node, buf, i, '|', sizeof node);
cprintf("%s\n", node);
}
cprintf("000\n");
}
else {
- cprintf("%d Invalid command.\n", ERROR+ILLEGAL_VALUE);
+ cprintf("%d Invalid command.\n", ERROR + ILLEGAL_VALUE);
}
}
* Initialize the SMTP outbound queue
*/
void smtp_init_spoolout(void) {
- struct room qrbuf;
+ struct ctdlroom qrbuf;
/*
* Create the room. This will silently fail if the room already
* exists, and that's perfectly ok, because we want it to exist.
*/
- create_room(SMTP_SPOOLOUT_ROOM, 3, "", 0, 1, 0);
+ create_room(SMTP_SPOOLOUT_ROOM, 3, "", 0, 1, 0, VIEW_MAILBOX);
/*
* Make sure it's set to be a "system room" so it doesn't show up
/*****************************************************************************/
/* MODULE INITIALIZATION STUFF */
/*****************************************************************************/
+/*
+ * This cleanup function blows away the temporary memory used by
+ * the SMTP server.
+ */
+void smtp_cleanup_function(void) {
+
+ /* Don't do this stuff if this is not an SMTP session! */
+ if (CC->h_command_function != smtp_command_loop) return;
+
+ lprintf(CTDL_DEBUG, "Performing SMTP cleanup hook\n");
+ free(SMTP);
+ free(SMTP_ROOMS);
+ free(SMTP_RECPS);
+}
+
+
+
char *serv_smtp_init(void)
{
- SYM_SMTP = CtdlGetDynamicSymbol();
-
- CtdlRegisterServiceHook(config.c_smtp_port, /* On the net... */
+ CtdlRegisterServiceHook(config.c_smtp_port, /* SMTP MTA */
NULL,
smtp_greeting,
- smtp_command_loop);
+ smtp_command_loop,
+ NULL);
- CtdlRegisterServiceHook(0, /* ...and locally */
- "smtp.socket",
- smtp_greeting,
- smtp_command_loop);
+#ifdef HAVE_OPENSSL
+ CtdlRegisterServiceHook(config.c_smtps_port,
+ NULL,
+ smtps_greeting,
+ smtp_command_loop,
+ NULL);
+#endif
+
+ CtdlRegisterServiceHook(config.c_msa_port, /* SMTP MSA */
+ NULL,
+ smtp_msa_greeting,
+ smtp_command_loop,
+ NULL);
+
+ CtdlRegisterServiceHook(0, /* local LMTP */
+#ifndef HAVE_RUN_DIR
+ "."
+#else
+ RUN_DIR
+#endif
+ "/lmtp.socket",
+ lmtp_greeting,
+ smtp_command_loop,
+ NULL);
+
+ CtdlRegisterServiceHook(0, /* local LMTP */
+#ifndef HAVE_RUN_DIR
+ "."
+#else
+ RUN_DIR
+#endif
+ "/lmtp-unfiltered.socket",
+ lmtp_unfiltered_greeting,
+ smtp_command_loop,
+ NULL);
smtp_init_spoolout();
CtdlRegisterSessionHook(smtp_do_queue, EVT_TIMER);
+ CtdlRegisterSessionHook(smtp_cleanup_function, EVT_STOP);
CtdlRegisterProtoHook(cmd_smtp, "SMTP", "SMTP utility commands");
return "$Id$";
}
projects / citadel.git / blobdiff