* The VRFY and EXPN commands have been removed from this implementation
* because nobody uses these commands anymore, except for spammers.
*
- * Copyright (c) 1998-2012 by the citadel.org team
+ * Copyright (c) 1998-2018 by the citadel.org team
*
- * This program is open source software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 3.
+ * This program is open source software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3.
*
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
*/
#include "sysdep.h"
#include "config.h"
#include "control.h"
#include "user_ops.h"
+#include "room_ops.h"
#include "database.h"
#include "msgbase.h"
#include "internet_addressing.h"
#include "clientsocket.h"
#include "locate_host.h"
#include "citadel_dirs.h"
-
-
-
-#ifndef HAVE_SNPRINTF
-#include "snprintf.h"
-#endif
-
-
#include "ctdl_module.h"
#include "smtp_util.h"
+
enum { /* Command states for login authentication */
smtp_command,
smtp_user,
smtp_plain
};
+enum SMTP_FLAGS {
+ HELO,
+ EHLO,
+ LHLO
+};
+
+typedef void (*smtp_handler)(long offest, long Flags);
+
+typedef struct _smtp_handler_hook {
+ smtp_handler h;
+ int Flags;
+} smtp_handler_hook;
+
+int EnableSMTPLog = 0;
+
+HashList *SMTPCmds = NULL;
+#define MaxSMTPCmdLen 10
+
+#define RegisterSmtpCMD(First, H, Flags) \
+ registerSmtpCMD(HKEY(First), H, Flags)
+void registerSmtpCMD(const char *First, long FLen,
+ smtp_handler H,
+ int Flags)
+{
+ smtp_handler_hook *h;
+
+ if (FLen >= MaxSMTPCmdLen)
+ {
+ abort();
+ }
+
+ h = (smtp_handler_hook*) malloc(sizeof(smtp_handler_hook));
+ memset(h, 0, sizeof(smtp_handler_hook));
+
+ h->Flags = Flags;
+ h->h = H;
+ Put(SMTPCmds, First, FLen, h, NULL);
+}
+
+
+void smtp_cleanup(void)
+{
+ DeleteHash(&SMTPCmds);
+}
/*
* Here's where our SMTP session begins its happy day.
memset(SMTP, 0, sizeof(citsmtp));
sSMTP = SMTP;
sSMTP->is_msa = is_msa;
+ sSMTP->Cmd = NewStrBufPlain(NULL, SIZ);
+ sSMTP->helo_node = NewStrBuf();
+ sSMTP->from = NewStrBufPlain(NULL, SIZ);
+ sSMTP->recipients = NewStrBufPlain(NULL, SIZ);
+ sSMTP->OneRcpt = NewStrBufPlain(NULL, SIZ);
+ sSMTP->preferred_sender_email = NULL;
+ sSMTP->preferred_sender_name = NULL;
/* If this config option is set, reject connections from problem
* addresses immediately instead of after they execute a RCPT
*/
- if ( (config.c_rbl_at_greeting) && (sSMTP->is_msa == 0) ) {
- if (rbl_check(message_to_spammer)) {
+ if ( (CtdlGetConfigInt("c_rbl_at_greeting")) && (sSMTP->is_msa == 0) ) {
+ if (rbl_check(CC->cs_addr, message_to_spammer)) {
if (server_shutting_down)
cprintf("421 %s\r\n", message_to_spammer);
else
/* Note: the FQDN *must* appear as the first thing after the 220 code.
* Some clients (including citmail.c) depend on it being there.
*/
- cprintf("220 %s ESMTP Citadel server ready.\r\n", config.c_fqdn);
+ cprintf("220 %s ESMTP Citadel server ready.\r\n", CtdlGetConfigStr("c_fqdn"));
}
/*
* Login greeting common to all auth methods
*/
-void smtp_auth_greeting(void) {
- cprintf("235 Hello, %s\r\n", CC->user.fullname);
- syslog(LOG_NOTICE, "SMTP authenticated %s\n", CC->user.fullname);
- CC->internal_pgm = 0;
- CC->cs_flags &= ~CS_STEALTH;
+void smtp_auth_greeting(long offset, long Flags) {
+ struct CitContext *CCC = CC;
+ cprintf("235 Hello, %s\r\n", CCC->user.fullname);
+ syslog(LOG_NOTICE, "SMTP authenticated %s", CCC->user.fullname);
+ CCC->internal_pgm = 0;
+ CCC->cs_flags &= ~CS_STEALTH;
}
*
* which_command: 0=HELO, 1=EHLO, 2=LHLO
*/
-void smtp_hello(char *argbuf, int which_command) {
+void smtp_hello(long offset, long which_command)
+{
+ struct CitContext *CCC = CC;
citsmtp *sSMTP = SMTP;
- safestrncpy(sSMTP->helo_node, argbuf, sizeof sSMTP->helo_node);
+ StrBufAppendBuf (sSMTP->helo_node, sSMTP->Cmd, offset);
- if ( (which_command != 2) && (sSMTP->is_lmtp) ) {
+ if ( (which_command != LHLO) && (sSMTP->is_lmtp) ) {
cprintf("500 Only LHLO is allowed when running LMTP\r\n");
return;
}
- if ( (which_command == 2) && (sSMTP->is_lmtp == 0) ) {
+ if ( (which_command == LHLO) && (sSMTP->is_lmtp == 0) ) {
cprintf("500 LHLO is only allowed when running LMTP\r\n");
return;
}
- if (which_command == 0) {
+ if (which_command == HELO) {
cprintf("250 Hello %s (%s [%s])\r\n",
- sSMTP->helo_node,
- CC->cs_host,
- CC->cs_addr
+ ChrPtr(sSMTP->helo_node),
+ CCC->cs_host,
+ CCC->cs_addr
);
}
else {
- if (which_command == 1) {
+ if (which_command == EHLO) {
cprintf("250-Hello %s (%s [%s])\r\n",
- sSMTP->helo_node,
- CC->cs_host,
- CC->cs_addr
+ ChrPtr(sSMTP->helo_node),
+ CCC->cs_host,
+ CCC->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);
+ cprintf("250-SIZE %ld\r\n", CtdlGetConfigLong("c_maxmsglen"));
#ifdef HAVE_OPENSSL
/*
* 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) && (sSMTP->is_msa) ) {
+ if ( (!CCC->redirect_ssl) && (sSMTP->is_msa) ) {
cprintf("250-STARTTLS\r\n");
}
#endif /* HAVE_OPENSSL */
}
+/*
+ * Backend function for smtp_webcit_preferences_hack().
+ * Look at a message and determine if it's the preferences file.
+ */
+void smtp_webcit_preferences_hack_backend(long msgnum, void *userdata) {
+ struct CtdlMessage *msg;
+ char **webcit_conf = (char **) userdata;
+
+ if (*webcit_conf) {
+ return; // already got it
+ }
+
+ msg = CtdlFetchMessage(msgnum, 1, 1);
+ if (msg == NULL) {
+ return;
+ }
+
+ if ( !CM_IsEmpty(msg, eMsgSubject) &&
+ (!strcasecmp(msg->cm_fields[eMsgSubject], "__ WebCit Preferences __")))
+ {
+ /* This is it! Change ownership of the message text so it doesn't get freed. */
+ *webcit_conf = (char *)msg->cm_fields[eMesageText];
+ msg->cm_fields[eMesageText] = NULL;
+ }
+ CM_Free(msg);
+}
+
+
+/*
+ * The configuration item for the user's preferred display name for outgoing email is, unfortunately,
+ * stored in the account's WebCit configuration. We have to fetch it now.
+ */
+void smtp_webcit_preferences_hack(void) {
+ struct CitContext *CCC = CC;
+ char config_roomname[ROOMNAMELEN];
+ char *webcit_conf = NULL;
+ citsmtp *sSMTP = SMTP;
+
+ snprintf(config_roomname, sizeof config_roomname, "%010ld.%s", CCC->user.usernum, USERCONFIGROOM);
+ if (CtdlGetRoom(&CCC->room, config_roomname) != 0) {
+ return;
+ }
+
+ /*
+ * Find the WebCit configuration message
+ */
+
+ CtdlForEachMessage(MSGS_ALL, 1, NULL, NULL, NULL, smtp_webcit_preferences_hack_backend, (void *)&webcit_conf);
+
+ if (!webcit_conf) {
+ return;
+ }
+
+ /* Parse the webcit configuration and attempt to do something useful with it */
+ char *str = webcit_conf;
+ char *saveptr = str;
+ char *this_line = NULL;
+ while (this_line = strtok_r(str, "\n", &saveptr), this_line != NULL) {
+ str = NULL;
+ if (!strncasecmp(this_line, "defaultfrom|", 12)) {
+ sSMTP->preferred_sender_email = NewStrBufPlain(&this_line[12], -1);
+ }
+ if (!strncasecmp(this_line, "defaultname|", 12)) {
+ sSMTP->preferred_sender_name = NewStrBufPlain(&this_line[12], -1);
+ }
+ if ((!strncasecmp(this_line, "defaultname|", 12)) && (sSMTP->preferred_sender_name == NULL)) {
+ sSMTP->preferred_sender_name = NewStrBufPlain(&this_line[12], -1);
+ }
+
+ }
+ free(webcit_conf);
+}
+
+
/*
* Implement HELP command.
*/
-void smtp_help(void) {
+void smtp_help(long offset, long Flags) {
cprintf("214 RTFM http://www.ietf.org/rfc/rfc2821.txt\r\n");
}
/*
*
*/
-void smtp_get_user(char *argbuf) {
+void smtp_get_user(long offset)
+{
char buf[SIZ];
- char username[SIZ];
citsmtp *sSMTP = SMTP;
- CtdlDecodeBase64(username, argbuf, SIZ);
- /* syslog(LOG_DEBUG, "Trying <%s>\n", username); */
- if (CtdlLoginExistingUser(NULL, username) == login_ok) {
- CtdlEncodeBase64(buf, "Password:", 9, 0);
+ StrBufDecodeBase64(sSMTP->Cmd);
+
+ if (CtdlLoginExistingUser(ChrPtr(sSMTP->Cmd)) == login_ok) {
+ size_t len = CtdlEncodeBase64(buf, "Password:", 9, 0);
+
+ if (buf[len - 1] == '\n') {
+ buf[len - 1] = '\0';
+ }
cprintf("334 %s\r\n", buf);
sSMTP->command_state = smtp_password;
}
/*
*
*/
-void smtp_get_pass(char *argbuf) {
+void smtp_get_pass(long offset, long Flags)
+{
+ citsmtp *sSMTP = SMTP;
char password[SIZ];
- long len;
- memset(password, 0, sizeof(password));
- len = CtdlDecodeBase64(password, argbuf, SIZ);
- /* syslog(LOG_DEBUG, "Trying <%s>\n", password); */
- if (CtdlTryPassword(password, len) == pass_ok) {
- smtp_auth_greeting();
+ memset(password, 0, sizeof(password));
+ StrBufDecodeBase64(sSMTP->Cmd);
+ syslog(LOG_DEBUG, "Trying <%s>", password);
+ if (CtdlTryPassword(SKEY(sSMTP->Cmd)) == pass_ok) {
+ smtp_auth_greeting(offset, Flags);
}
else {
cprintf("535 Authentication failed.\r\n");
}
- SMTP->command_state = smtp_command;
+ sSMTP->command_state = smtp_command;
}
/*
* Back end for PLAIN auth method (either inline or multistate)
*/
-void smtp_try_plain(char *encoded_authstring) {
- char decoded_authstring[1024];
- char ident[256];
- char user[256];
- char pass[256];
+void smtp_try_plain(long offset, long Flags)
+{
+ citsmtp *sSMTP = SMTP;
+ const char*decoded_authstring;
+ char ident[256] = "";
+ char user[256] = "";
+ char pass[256] = "";
int result;
- long len;
- CtdlDecodeBase64(decoded_authstring, encoded_authstring, strlen(encoded_authstring) );
- safestrncpy(ident, decoded_authstring, sizeof ident);
- safestrncpy(user, &decoded_authstring[strlen(ident) + 1], sizeof user);
- len = safestrncpy(pass, &decoded_authstring[strlen(ident) + strlen(user) + 2], sizeof pass);
- if (len == -1)
- len = sizeof(pass) - 1;
+ long decoded_len;
+ long len = 0;
+ long plen = 0;
+
+ memset(pass, 0, sizeof(pass));
+ decoded_len = StrBufDecodeBase64(sSMTP->Cmd);
- SMTP->command_state = smtp_command;
+ if (decoded_len > 0)
+ {
+ decoded_authstring = ChrPtr(sSMTP->Cmd);
+
+ len = safestrncpy(ident, decoded_authstring, sizeof ident);
+
+ decoded_len -= len - 1;
+ decoded_authstring += len + 1;
+
+ if (decoded_len > 0)
+ {
+ len = safestrncpy(user, decoded_authstring, sizeof user);
+
+ decoded_authstring += len + 1;
+ decoded_len -= len - 1;
+ }
+
+ if (decoded_len > 0)
+ {
+ plen = safestrncpy(pass, decoded_authstring, sizeof pass);
+
+ if (plen < 0)
+ plen = sizeof(pass) - 1;
+ }
+ }
+
+ sSMTP->command_state = smtp_command;
if (!IsEmptyStr(ident)) {
- result = CtdlLoginExistingUser(user, ident);
+ result = CtdlLoginExistingUser(ident);
}
else {
- result = CtdlLoginExistingUser(NULL, user);
+ result = CtdlLoginExistingUser(user);
}
if (result == login_ok) {
- if (CtdlTryPassword(pass, len) == pass_ok) {
- smtp_auth_greeting();
+ if (CtdlTryPassword(pass, plen) == pass_ok) {
+ smtp_webcit_preferences_hack();
+ smtp_auth_greeting(offset, Flags);
return;
}
}
/*
* Attempt to perform authenticated SMTP
*/
-void smtp_auth(char *argbuf) {
+void smtp_auth(long offset, long Flags)
+{
+ struct CitContext *CCC = CC;
+ citsmtp *sSMTP = SMTP;
char username_prompt[64];
char method[64];
char encoded_authstring[1024];
- if (CC->logged_in) {
+ if (CCC->logged_in) {
cprintf("504 Already logged in.\r\n");
return;
}
- extract_token(method, argbuf, 0, ' ', sizeof method);
+ extract_token(method, ChrPtr(sSMTP->Cmd) + offset, 0, ' ', sizeof method);
if (!strncasecmp(method, "login", 5) ) {
- if (strlen(argbuf) >= 7) {
- smtp_get_user(&argbuf[6]);
+ if (StrLength(sSMTP->Cmd) - offset >= 7) {
+ smtp_get_user(6);
}
else {
- CtdlEncodeBase64(username_prompt, "Username:", 9, 0);
+ size_t len = CtdlEncodeBase64(username_prompt, "Username:", 9, 0);
+ if (username_prompt[len - 1] == '\n') {
+ username_prompt[len - 1] = '\0';
+ }
cprintf("334 %s\r\n", username_prompt);
- SMTP->command_state = smtp_user;
+ sSMTP->command_state = smtp_user;
}
return;
}
if (!strncasecmp(method, "plain", 5) ) {
- if (num_tokens(argbuf, ' ') < 2) {
+ long len;
+ if (num_tokens(ChrPtr(sSMTP->Cmd) + offset, ' ') < 2) {
cprintf("334 \r\n");
SMTP->command_state = smtp_plain;
return;
}
- extract_token(encoded_authstring, argbuf, 1, ' ', sizeof encoded_authstring);
-
- smtp_try_plain(encoded_authstring);
+ len = extract_token(encoded_authstring,
+ ChrPtr(sSMTP->Cmd) + offset,
+ 1, ' ',
+ sizeof encoded_authstring);
+ StrBufPlain(sSMTP->Cmd, encoded_authstring, len);
+ smtp_try_plain(0, Flags);
return;
}
*
* Set do_response to nonzero to output the SMTP RSET response code.
*/
-void smtp_rset(int do_response) {
- int is_lmtp;
- int is_unfiltered;
+void smtp_rset(long offset, long do_response) {
citsmtp *sSMTP = SMTP;
/*
* but we need to preserve this one little piece of information, so
* we save it for later.
*/
- is_lmtp = sSMTP->is_lmtp;
- is_unfiltered = sSMTP->is_unfiltered;
- memset(sSMTP, 0, sizeof(citsmtp));
+ FlushStrBuf(sSMTP->Cmd);
+ FlushStrBuf(sSMTP->helo_node);
+ FlushStrBuf(sSMTP->from);
+ FlushStrBuf(sSMTP->recipients);
+ FlushStrBuf(sSMTP->OneRcpt);
+
+ sSMTP->command_state = 0;
+ sSMTP->number_of_recipients = 0;
+ sSMTP->delivery_mode = 0;
+ sSMTP->message_originated_locally = 0;
+ sSMTP->is_msa = 0;
+ /*
+ * we must remember is_lmtp & is_unfiltered.
+ */
/*
* It is somewhat ambiguous whether we want to log out when a RSET
* }
*/
- /*
- * Reinstate this little piece of information we saved (see above).
- */
- sSMTP->is_lmtp = is_lmtp;
- sSMTP->is_unfiltered = is_unfiltered;
-
if (do_response) {
cprintf("250 Zap!\r\n");
}
* Clear out the portions of the state buffer that need to be cleared out
* after the DATA command finishes.
*/
-void smtp_data_clear(void) {
+void smtp_data_clear(long offset, long flags)
+{
citsmtp *sSMTP = SMTP;
- strcpy(sSMTP->from, "");
- strcpy(sSMTP->recipients, "");
+ FlushStrBuf(sSMTP->from);
+ FlushStrBuf(sSMTP->recipients);
+ FlushStrBuf(sSMTP->OneRcpt);
sSMTP->number_of_recipients = 0;
sSMTP->delivery_mode = 0;
sSMTP->message_originated_locally = 0;
/*
* Implements the "MAIL FROM:" command
*/
-void smtp_mail(char *argbuf) {
+void smtp_mail(long offset, long flags) {
char user[SIZ];
char node[SIZ];
char name[SIZ];
+ struct CitContext *CCC = CC;
citsmtp *sSMTP = SMTP;
- if (!IsEmptyStr(sSMTP->from)) {
+ if (StrLength(sSMTP->from) > 0) {
cprintf("503 Only one sender permitted\r\n");
return;
}
- if (strncasecmp(argbuf, "From:", 5)) {
+ if (strncasecmp(ChrPtr(sSMTP->Cmd) + offset, "From:", 5)) {
cprintf("501 Syntax error\r\n");
return;
}
- strcpy(sSMTP->from, &argbuf[5]);
- striplt(sSMTP->from);
- if (haschar(sSMTP->from, '<') > 0) {
- stripallbut(sSMTP->from, '<', '>');
+ StrBufAppendBuf(sSMTP->from, sSMTP->Cmd, offset);
+ StrBufTrim(sSMTP->from);
+ if (strchr(ChrPtr(sSMTP->from), '<') != NULL) {
+ StrBufStripAllBut(sSMTP->from, '<', '>');
}
/* We used to reject empty sender names, until it was brought to our
* address so we don't have to contend with the empty string causing
* other code to fail when it's expecting something there.
*/
- if (IsEmptyStr(sSMTP->from)) {
- strcpy(sSMTP->from, "someone@example.com");
+ if (StrLength(sSMTP->from) == 0) {
+ StrBufPlain(sSMTP->from, HKEY("someone@example.com"));
}
/* If this SMTP connection is from a logged-in user, force the 'from'
* to be the user's Internet e-mail address as Citadel knows it.
*/
- if (CC->logged_in) {
- safestrncpy(sSMTP->from, CC->cs_inet_email, sizeof sSMTP->from);
- cprintf("250 Sender ok <%s>\r\n", sSMTP->from);
+ if (CCC->logged_in) {
+ StrBufPlain(sSMTP->from, CCC->cs_inet_email, -1);
+ cprintf("250 Sender ok <%s>\r\n", ChrPtr(sSMTP->from));
sSMTP->message_originated_locally = 1;
return;
}
/* Otherwise, make sure outsiders aren't trying to forge mail from
* this system (unless, of course, c_allow_spoofing is enabled)
*/
- else if (config.c_allow_spoofing == 0) {
- process_rfc822_addr(sSMTP->from, user, node, name);
+ else if (CtdlGetConfigInt("c_allow_spoofing") == 0) {
+ process_rfc822_addr(ChrPtr(sSMTP->from), user, node, name);
+ syslog(LOG_DEBUG, "Claimed envelope sender is '%s' == '%s' @ '%s' ('%s')",
+ ChrPtr(sSMTP->from), user, node, name
+ );
if (CtdlHostAlias(node) != hostalias_nomatch) {
cprintf("550 You must log in to send mail from %s\r\n", node);
- strcpy(sSMTP->from, "");
+ FlushStrBuf(sSMTP->from);
+ syslog(LOG_DEBUG, "Rejecting unauthenticated mail from %s", node);
return;
}
}
/*
* Implements the "RCPT To:" command
*/
-void smtp_rcpt(char *argbuf) {
- char recp[1024];
+void smtp_rcpt(long offset, long flags)
+{
+ struct CitContext *CCC = CC;
char message_to_spammer[SIZ];
- struct recptypes *valid = NULL;
+ recptypes *valid = NULL;
citsmtp *sSMTP = SMTP;
- if (IsEmptyStr(sSMTP->from)) {
+ if (StrLength(sSMTP->from) == 0) {
cprintf("503 Need MAIL before RCPT\r\n");
return;
}
-
- if (strncasecmp(argbuf, "To:", 3)) {
+
+ if (strncasecmp(ChrPtr(sSMTP->Cmd) + offset, "To:", 3)) {
cprintf("501 Syntax error\r\n");
return;
}
- if ( (sSMTP->is_msa) && (!CC->logged_in) ) {
+ if ( (sSMTP->is_msa) && (!CCC->logged_in) ) {
cprintf("550 You must log in to send mail on this port.\r\n");
- strcpy(sSMTP->from, "");
+ FlushStrBuf(sSMTP->from);
return;
}
+ FlushStrBuf(sSMTP->OneRcpt);
+ StrBufAppendBuf(sSMTP->OneRcpt, sSMTP->Cmd, offset + 3);
+ StrBufTrim(sSMTP->OneRcpt);
+ StrBufStripAllBut(sSMTP->OneRcpt, '<', '>');
- safestrncpy(recp, &argbuf[3], sizeof recp);
- striplt(recp);
- stripallbut(recp, '<', '>');
-
- if ( (strlen(recp) + strlen(sSMTP->recipients) + 1 ) >= SIZ) {
+ if ( (StrLength(sSMTP->OneRcpt) + StrLength(sSMTP->recipients)) >= SIZ) {
cprintf("452 Too many recipients\r\n");
return;
}
/* RBL check */
- if ( (!CC->logged_in) /* Don't RBL authenticated users */
+ if ( (!CCC->logged_in) /* Don't RBL authenticated users */
&& (!sSMTP->is_lmtp) ) { /* Don't RBL LMTP clients */
- if (config.c_rbl_at_greeting == 0) { /* Don't RBL again if we already did it */
- if (rbl_check(message_to_spammer)) {
+ if (CtdlGetConfigInt("c_rbl_at_greeting") == 0) { /* Don't RBL again if we already did it */
+ if (rbl_check(CC->cs_addr, message_to_spammer)) {
if (server_shutting_down)
cprintf("421 %s\r\n", message_to_spammer);
else
}
valid = validate_recipients(
- recp,
+ ChrPtr(sSMTP->OneRcpt),
smtp_get_Recipients(),
- (sSMTP->is_lmtp)? POST_LMTP: (CC->logged_in)? POST_LOGGED_IN: POST_EXTERNAL
+ (sSMTP->is_lmtp)? POST_LMTP: (CCC->logged_in)? POST_LOGGED_IN: POST_EXTERNAL
);
if (valid->num_error != 0) {
cprintf("550 %s\r\n", valid->errormsg);
}
if (valid->num_internet > 0) {
- if (CC->logged_in) {
- if (CtdlCheckInternetMailPermission(&CC->user)==0) {
- cprintf("551 <%s> - you do not have permission to send Internet mail\r\n", recp);
+ if (CCC->logged_in) {
+ if (CtdlCheckInternetMailPermission(&CCC->user)==0) {
+ cprintf("551 <%s> - you do not have permission to send Internet mail\r\n",
+ ChrPtr(sSMTP->OneRcpt));
free_recipients(valid);
return;
}
if (valid->num_internet > 0) {
if ( (sSMTP->message_originated_locally == 0)
&& (sSMTP->is_lmtp == 0) ) {
- cprintf("551 <%s> - relaying denied\r\n", recp);
+ cprintf("551 <%s> - relaying denied\r\n", ChrPtr(sSMTP->OneRcpt));
free_recipients(valid);
return;
}
}
- cprintf("250 RCPT ok <%s>\r\n", recp);
- if (!IsEmptyStr(sSMTP->recipients)) {
- strcat(sSMTP->recipients, ",");
+ cprintf("250 RCPT ok <%s>\r\n", ChrPtr(sSMTP->OneRcpt));
+ if (StrLength(sSMTP->recipients) > 0) {
+ StrBufAppendBufPlain(sSMTP->recipients, HKEY(","), 0);
}
- strcat(sSMTP->recipients, recp);
- sSMTP->number_of_recipients += 1;
+ StrBufAppendBuf(sSMTP->recipients, sSMTP->OneRcpt, 0);
+ sSMTP->number_of_recipients ++;
if (valid != NULL) {
free_recipients(valid);
}
/*
* Implements the DATA command
*/
-void smtp_data(void) {
+void smtp_data(long offset, long flags)
+{
+ struct CitContext *CCC = CC;
StrBuf *body;
- char *defbody; //TODO: remove me
+ StrBuf *defbody;
struct CtdlMessage *msg = NULL;
long msgnum = (-1L);
char nowstamp[SIZ];
- struct recptypes *valid;
+ recptypes *valid;
int scan_errors;
int i;
- char result[SIZ];
citsmtp *sSMTP = SMTP;
- if (IsEmptyStr(sSMTP->from)) {
+ if (StrLength(sSMTP->from) == 0) {
cprintf("503 Need MAIL command first.\r\n");
return;
}
cprintf("354 Transmit message now - terminate with '.' by itself\r\n");
datestring(nowstamp, sizeof nowstamp, time(NULL), DATESTRING_RFC822);
- defbody = malloc(4096);
+ defbody = NewStrBufPlain(NULL, SIZ);
if (defbody != NULL) {
- if (sSMTP->is_lmtp && (CC->cs_UDSclientUID != -1)) {
- snprintf(defbody, 4096,
- "Received: from %s (Citadel from userid %ld)\n"
- " by %s; %s\n",
- sSMTP->helo_node,
- (long int) CC->cs_UDSclientUID,
- config.c_fqdn,
- nowstamp);
+ if (sSMTP->is_lmtp && (CCC->cs_UDSclientUID != -1)) {
+ StrBufPrintf(
+ defbody,
+ "Received: from %s (Citadel from userid %ld)\n"
+ " by %s; %s\n",
+ ChrPtr(sSMTP->helo_node),
+ (long int) CCC->cs_UDSclientUID,
+ CtdlGetConfigStr("c_fqdn"),
+ nowstamp);
}
else {
- snprintf(defbody, 4096,
- "Received: from %s (%s [%s])\n"
- " by %s; %s\n",
- sSMTP->helo_node,
- CC->cs_host,
- CC->cs_addr,
- config.c_fqdn,
- nowstamp);
+ StrBufPrintf(
+ defbody,
+ "Received: from %s (%s [%s])\n"
+ " by %s; %s\n",
+ ChrPtr(sSMTP->helo_node),
+ CCC->cs_host,
+ CCC->cs_addr,
+ CtdlGetConfigStr("c_fqdn"),
+ nowstamp);
}
}
- body = CtdlReadMessageBodyBuf(HKEY("."), config.c_maxmsglen, defbody, 1, NULL);
+ body = CtdlReadMessageBodyBuf(HKEY("."), CtdlGetConfigLong("c_maxmsglen"), defbody, 1);
+ FreeStrBuf(&defbody);
if (body == NULL) {
cprintf("550 Unable to save message: internal error.\r\n");
return;
}
- syslog(LOG_DEBUG, "Converting message...\n");
+ syslog(LOG_DEBUG, "Converting message...");
msg = convert_internet_message_buf(&body);
/* If the user is locally authenticated, FORCE the From: header to
* to something ugly like "0000058008.Sent Items>" when the message
* is read with a Citadel client.
*/
- if ( (CC->logged_in) && (config.c_rfc822_strict_from == 0) ) {
+ if ( (CCC->logged_in) && (CtdlGetConfigInt("c_rfc822_strict_from") != CFG_SMTP_FROM_NOFILTER) ) {
int validemail = 0;
-
- if (!IsEmptyStr(CC->cs_inet_email) &&
- !IsEmptyStr(msg->cm_fields['F']))
- validemail = strcmp(CC->cs_inet_email, msg->cm_fields['F']) == 0;
- if ((!validemail) &&
- (!IsEmptyStr(CC->cs_inet_other_emails)))
+
+ if (!CM_IsEmpty(msg, erFc822Addr) &&
+ ((CtdlGetConfigInt("c_rfc822_strict_from") == CFG_SMTP_FROM_CORRECT) ||
+ (CtdlGetConfigInt("c_rfc822_strict_from") == CFG_SMTP_FROM_REJECT) ) )
{
- int num_secondary_emails = 0;
- int i;
- num_secondary_emails = num_tokens(CC->cs_inet_other_emails, '|');
- for (i=0; i<num_secondary_emails && !validemail; ++i) {
- char buf[256];
- extract_token(buf, CC->cs_inet_other_emails,i,'|',sizeof CC->cs_inet_other_emails);
- validemail = strcmp(buf, msg->cm_fields['F']) == 0;
+ if (!IsEmptyStr(CCC->cs_inet_email))
+ validemail = strcmp(CCC->cs_inet_email, msg->cm_fields[erFc822Addr]) == 0;
+ if ((!validemail) &&
+ (!IsEmptyStr(CCC->cs_inet_other_emails)))
+ {
+ int num_secondary_emails = 0;
+ int i;
+ num_secondary_emails = num_tokens(CCC->cs_inet_other_emails, '|');
+ for (i=0; i < num_secondary_emails && !validemail; ++i) {
+ char buf[256];
+ extract_token(buf, CCC->cs_inet_other_emails,i,'|',sizeof CCC->cs_inet_other_emails);
+ validemail = strcmp(buf, msg->cm_fields[erFc822Addr]) == 0;
+ }
}
}
- if (!validemail) {
- syslog(LOG_ERR, "rejecting email because of invalid sender: %s\n", msg->cm_fields['F']);
- cprintf("550 fix your mail client config; this is not you!.\r\n");
- return;
+ if (!validemail && (CtdlGetConfigInt("c_rfc822_strict_from") == CFG_SMTP_FROM_REJECT)) {
+ syslog(LOG_ERR, "invalid sender '%s' - rejecting this message", msg->cm_fields[erFc822Addr]);
+ cprintf("550 Invalid sender '%s' - rejecting this message.\r\n", msg->cm_fields[erFc822Addr]);
+ return;
}
- 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);
+ CM_SetField(msg, eOriginalRoom, HKEY(MAILROOM));
+ if (sSMTP->preferred_sender_name != NULL)
+ CM_SetField(msg, eAuthor, SKEY(sSMTP->preferred_sender_name));
+ else
+ CM_SetField(msg, eAuthor, CCC->user.fullname, strlen(CCC->user.fullname));
+
+ if (!validemail) {
+ if (sSMTP->preferred_sender_email != NULL)
+ CM_SetField(msg, erFc822Addr, SKEY(sSMTP->preferred_sender_email));
+ else
+ CM_SetField(msg, erFc822Addr, CCC->cs_inet_email, strlen(CCC->cs_inet_email));
+ }
}
/* Set the "envelope from" address */
- if (msg->cm_fields['P'] != NULL) {
- free(msg->cm_fields['P']);
- }
- msg->cm_fields['P'] = strdup(sSMTP->from);
+ CM_SetField(msg, eMessagePath, SKEY(sSMTP->from));
/* Set the "envelope to" address */
- if (msg->cm_fields['V'] != NULL) {
- free(msg->cm_fields['V']);
- }
- msg->cm_fields['V'] = strdup(sSMTP->recipients);
+ CM_SetField(msg, eenVelopeTo, SKEY(sSMTP->recipients));
/* Submit the message into the Citadel system. */
valid = validate_recipients(
- sSMTP->recipients,
+ ChrPtr(sSMTP->recipients),
smtp_get_Recipients(),
- (sSMTP->is_lmtp)? POST_LMTP: (CC->logged_in)? POST_LOGGED_IN: POST_EXTERNAL
+ (sSMTP->is_lmtp)? POST_LMTP: (CCC->logged_in)? POST_LOGGED_IN: POST_EXTERNAL
);
/* If there are modules that want to scan this message before final
scan_errors = 0;
}
else {
- scan_errors = PerformMessageHooks(msg, EVT_SMTPSCAN);
+ scan_errors = PerformMessageHooks(msg, valid, EVT_SMTPSCAN);
}
if (scan_errors > 0) { /* We don't want this message! */
- if (msg->cm_fields['0'] == NULL) {
- msg->cm_fields['0'] = strdup("Message rejected by filter");
+ if (CM_IsEmpty(msg, eErrorMsg)) {
+ CM_SetField(msg, eErrorMsg, HKEY("Message rejected by filter"));
}
- sprintf(result, "550 %s\r\n", msg->cm_fields['0']);
+ StrBufPrintf(sSMTP->OneRcpt, "550 %s\r\n", msg->cm_fields[eErrorMsg]);
}
else { /* Ok, we'll accept this message. */
msgnum = CtdlSubmitMsg(msg, valid, "", 0);
if (msgnum > 0L) {
- sprintf(result, "250 Message accepted.\r\n");
+ StrBufPrintf(sSMTP->OneRcpt, "250 Message accepted.\r\n");
}
else {
- sprintf(result, "550 Internal delivery error\r\n");
+ StrBufPrintf(sSMTP->OneRcpt, "550 Internal delivery error\r\n");
}
}
*/
if (sSMTP->is_lmtp) {
for (i=0; i<sSMTP->number_of_recipients; ++i) {
- cprintf("%s", result);
+ cputbuf(sSMTP->OneRcpt);
}
}
else {
- cprintf("%s", result);
+ cputbuf(sSMTP->OneRcpt);
}
/* 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).
*/
syslog((LOG_MAIL | LOG_INFO),
- "%ld: from=<%s>, nrcpts=%d, relay=%s [%s], stat=%s",
- msgnum,
- sSMTP->from,
- sSMTP->number_of_recipients,
- CC->cs_host,
- CC->cs_addr,
- result
+ "%ld: from=<%s>, nrcpts=%d, relay=%s [%s], stat=%s",
+ msgnum,
+ ChrPtr(sSMTP->from),
+ sSMTP->number_of_recipients,
+ CCC->cs_host,
+ CCC->cs_addr,
+ ChrPtr(sSMTP->OneRcpt)
);
/* Clean up */
- CtdlFreeMessage(msg);
+ CM_Free(msg);
free_recipients(valid);
- smtp_data_clear(); /* clear out the buffers now */
+ smtp_data_clear(0, 0); /* clear out the buffers now */
}
/*
* implements the STARTTLS command
*/
-void smtp_starttls(void)
+void smtp_starttls(long offset, long flags)
{
char ok_response[SIZ];
char nosup_response[SIZ];
sprintf(nosup_response, "554 TLS not supported here\r\n");
sprintf(error_response, "554 Internal error\r\n");
CtdlModuleStartCryptoMsgs(ok_response, nosup_response, error_response);
- smtp_rset(0);
+ smtp_rset(0, 0);
}
/*
* Main command loop for SMTP server sessions.
*/
-void smtp_command_loop(void) {
- char cmdbuf[SIZ];
+void smtp_command_loop(void)
+{
+ static const ConstStr AuthPlainStr = {HKEY("AUTH PLAIN")};
+ struct CitContext *CCC = CC;
citsmtp *sSMTP = SMTP;
+ const char *pch, *pchs;
+ long i;
+ char CMD[MaxSMTPCmdLen + 1];
if (sSMTP == NULL) {
- syslog(LOG_EMERG, "Session SMTP data is null. WTF? We will crash now.\n");
- return cit_panic_backtrace (0);
+ syslog(LOG_EMERG, "Session SMTP data is null. WTF? We will crash now.");
+ abort();
}
- time(&CC->lastcmd);
- memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
- if (client_getln(cmdbuf, sizeof cmdbuf) < 1) {
- syslog(LOG_CRIT, "SMTP: client disconnected: ending session.\n");
+ time(&CCC->lastcmd);
+ if (CtdlClientGetLine(sSMTP->Cmd) < 1) {
+ syslog(LOG_CRIT, "SMTP: client disconnected: ending session.");
CC->kill_me = KILLME_CLIENT_DISCONNECTED;
return;
}
- syslog(LOG_INFO, "SMTP server: %s\n", cmdbuf);
- while (strlen(cmdbuf) < 5) strcat(cmdbuf, " ");
+ syslog(LOG_DEBUG, "SMTP server: %s", ChrPtr(sSMTP->Cmd));
if (sSMTP->command_state == smtp_user) {
- smtp_get_user(cmdbuf);
+ if (!strncmp(ChrPtr(sSMTP->Cmd), AuthPlainStr.Key, AuthPlainStr.len))
+ smtp_try_plain(0, 0);
+ else
+ smtp_get_user(0);
+ return;
}
else if (sSMTP->command_state == smtp_password) {
- smtp_get_pass(cmdbuf);
+ smtp_get_pass(0, 0);
+ return;
}
else if (sSMTP->command_state == smtp_plain) {
- smtp_try_plain(cmdbuf);
- }
-
- else if (!strncasecmp(cmdbuf, "AUTH", 4)) {
- smtp_auth(&cmdbuf[5]);
- }
-
- else if (!strncasecmp(cmdbuf, "DATA", 4)) {
- smtp_data();
- }
-
- else if (!strncasecmp(cmdbuf, "HELO", 4)) {
- 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);
+ smtp_try_plain(0, 0);
+ return;
}
- else if (!strncasecmp(cmdbuf, "HELP", 4)) {
- smtp_help();
+ pchs = pch = ChrPtr(sSMTP->Cmd);
+ i = 0;
+ while ((*pch != '\0') &&
+ (!isblank(*pch)) &&
+ (pch - pchs <= MaxSMTPCmdLen))
+ {
+ CMD[i] = toupper(*pch);
+ pch ++;
+ i++;
}
+ CMD[i] = '\0';
- else if (!strncasecmp(cmdbuf, "MAIL", 4)) {
- smtp_mail(&cmdbuf[5]);
- }
+ if ((*pch == '\0') ||
+ (isblank(*pch)))
+ {
+ void *v;
- else if (!strncasecmp(cmdbuf, "NOOP", 4)) {
- cprintf("250 NOOP\r\n");
- }
+ if (GetHash(SMTPCmds, CMD, i, &v) &&
+ (v != NULL))
+ {
+ smtp_handler_hook *h = (smtp_handler_hook*) v;
- else if (!strncasecmp(cmdbuf, "QUIT", 4)) {
- cprintf("221 Goodbye...\r\n");
- CC->kill_me = KILLME_CLIENT_LOGGED_OUT;
- return;
- }
+ if (isblank(pchs[i]))
+ i++;
- else if (!strncasecmp(cmdbuf, "RCPT", 4)) {
- smtp_rcpt(&cmdbuf[5]);
- }
+ h->h(i, h->Flags);
- else if (!strncasecmp(cmdbuf, "RSET", 4)) {
- smtp_rset(1);
- }
-#ifdef HAVE_OPENSSL
- else if (!strcasecmp(cmdbuf, "STARTTLS")) {
- smtp_starttls();
- }
-#endif
- else {
- cprintf("502 I'm afraid I can't do that.\r\n");
+ return;
+ }
}
+ cprintf("502 I'm afraid I can't do that.\r\n");
+}
-
+void smtp_noop(long offest, long Flags)
+{
+ cprintf("250 NOOP\r\n");
}
+void smtp_quit(long offest, long Flags)
+{
+ cprintf("221 Goodbye...\r\n");
+ CC->kill_me = KILLME_CLIENT_LOGGED_OUT;
+}
/*****************************************************************************/
/* MODULE INITIALIZATION STUFF */
* This cleanup function blows away the temporary memory used by
* the SMTP server.
*/
-void smtp_cleanup_function(void) {
+void smtp_cleanup_function(void)
+{
+ citsmtp *sSMTP = SMTP;
+ struct CitContext *CCC = CC;
/* Don't do this stuff if this is not an SMTP session! */
- if (CC->h_command_function != smtp_command_loop) return;
+ if (CCC->h_command_function != smtp_command_loop) return;
- syslog(LOG_DEBUG, "Performing SMTP cleanup hook\n");
- free(SMTP);
-}
+ syslog(LOG_DEBUG, "Performing SMTP cleanup hook");
+ FreeStrBuf(&sSMTP->Cmd);
+ FreeStrBuf(&sSMTP->helo_node);
+ FreeStrBuf(&sSMTP->from);
+ FreeStrBuf(&sSMTP->recipients);
+ FreeStrBuf(&sSMTP->OneRcpt);
+ FreeStrBuf(&sSMTP->preferred_sender_email);
+ FreeStrBuf(&sSMTP->preferred_sender_name);
+ free(sSMTP);
+}
const char *CitadelServiceSMTP_MTA="SMTP-MTA";
const char *CitadelServiceSMTPS_MTA="SMTPs-MTA";
const char *CitadelServiceSMTP_LMTP="LMTP";
const char *CitadelServiceSMTP_LMTP_UNF="LMTP-UnF";
+
CTDL_MODULE_INIT(smtp)
{
if (!threading)
{
- CtdlRegisterServiceHook(config.c_smtp_port, /* SMTP MTA */
+ SMTPCmds = NewHash(1, NULL);
+
+ RegisterSmtpCMD("AUTH", smtp_auth, 0);
+ RegisterSmtpCMD("DATA", smtp_data, 0);
+ RegisterSmtpCMD("HELO", smtp_hello, HELO);
+ RegisterSmtpCMD("EHLO", smtp_hello, EHLO);
+ RegisterSmtpCMD("LHLO", smtp_hello, LHLO);
+ RegisterSmtpCMD("HELP", smtp_help, 0);
+ RegisterSmtpCMD("MAIL", smtp_mail, 0);
+ RegisterSmtpCMD("NOOP", smtp_noop, 0);
+ RegisterSmtpCMD("QUIT", smtp_quit, 0);
+ RegisterSmtpCMD("RCPT", smtp_rcpt, 0);
+ RegisterSmtpCMD("RSET", smtp_rset, 1);
+#ifdef HAVE_OPENSSL
+ RegisterSmtpCMD("STARTTLS", smtp_starttls, 0);
+#endif
+
+
+ CtdlRegisterServiceHook(CtdlGetConfigInt("c_smtp_port"), /* SMTP MTA */
NULL,
smtp_mta_greeting,
smtp_command_loop,
CitadelServiceSMTP_MTA);
#ifdef HAVE_OPENSSL
- CtdlRegisterServiceHook(config.c_smtps_port,
+ CtdlRegisterServiceHook(CtdlGetConfigInt("c_smtps_port"), /* SMTPS MTA */
NULL,
smtps_greeting,
smtp_command_loop,
CitadelServiceSMTPS_MTA);
#endif
- CtdlRegisterServiceHook(config.c_msa_port, /* SMTP MSA */
+ CtdlRegisterServiceHook(CtdlGetConfigInt("c_msa_port"), /* SMTP MSA */
NULL,
smtp_msa_greeting,
smtp_command_loop,
NULL,
CitadelServiceSMTP_LMTP_UNF);
+ CtdlRegisterCleanupHook(smtp_cleanup);
CtdlRegisterSessionHook(smtp_cleanup_function, EVT_STOP, PRIO_STOP + 250);
}
projects / citadel.git / blobdiff