* RFC 2821 - Simple Mail Transfer Protocol
* RFC 2822 - Internet Message Format
* RFC 2920 - SMTP Service Extension for Command Pipelining
- *
+ *
* The VRFY and EXPN commands have been removed from this implementation
* because nobody uses these commands anymore, except for spammers.
*
#include "smtp_util.h"
#include "event_client.h"
#include "smtpqueue.h"
+#include "smtp_clienthandlers.h"
-#ifdef EXPERIMENTAL_SMTP_EVENT_CLIENT
-/*****************************************************************************/
-/* SMTP CLIENT (OUTBOUND PROCESSING) STUFF */
-/*****************************************************************************/
-
-typedef enum _eSMTP_C_States {
- eConnect,
- eEHLO,
- eHELO,
- eSMTPAuth,
- eFROM,
- eRCPT,
- eDATA,
- eDATABody,
- eDATATerminateBody,
- eQUIT,
- eMaxSMTPC
-} eSMTP_C_States;
-
-const long SMTP_C_ConnTimeout = 60; /* wail 1 minute for connections... */
-const long SMTP_C_ReadTimeouts[eMaxSMTPC] = {
- 90, /* Greeting... */
- 30, /* EHLO */
- 30, /* HELO */
- 30, /* Auth */
- 30, /* From */
- 30, /* RCPT */
- 30, /* DATA */
- 90, /* DATABody */
- 900, /* end of body... */
- 30 /* QUIT */
-};
-/*
-const long SMTP_C_SendTimeouts[eMaxSMTPC] = {
-
-}; */
-const char *ReadErrors[eMaxSMTPC] = {
- "Connection broken during SMTP conversation",
- "Connection broken during SMTP EHLO",
- "Connection broken during SMTP HELO",
- "Connection broken during SMTP AUTH",
- "Connection broken during SMTP MAIL FROM",
- "Connection broken during SMTP RCPT",
- "Connection broken during SMTP DATA",
- "Connection broken during SMTP message transmit",
- ""/* quit reply, don't care. */
-};
-
-
-typedef struct _stmp_out_msg {
- MailQEntry *MyQEntry;
- OneQueItem *MyQItem;
- long n;
- AsyncIO IO;
-
- eSMTP_C_States State;
-
- struct ares_mx_reply *AllMX;
- struct ares_mx_reply *CurrMX;
- const char *mx_port;
- const char *mx_host;
-
- struct hostent *OneMX;
-
- char mx_user[1024];
- char mx_pass[1024];
- StrBuf *msgtext;
- char *envelope_from;
- char user[1024];
- char node[1024];
- char name[1024];
- char mailfrom[1024];
-} SmtpOutMsg;
-
+const unsigned short DefaultMXPort = 25;
void DeleteSmtpOutMsg(void *v)
{
SmtpOutMsg *Msg = v;
ares_free_data(Msg->AllMX);
-
+ if (Msg->HostLookup.VParsedDNSReply != NULL)
+ Msg->HostLookup.DNSReplyFree(Msg->HostLookup.VParsedDNSReply);
+ FreeURL(&Msg->Relay);
FreeStrBuf(&Msg->msgtext);
FreeAsyncIOContents(&Msg->IO);
+ memset (Msg, 0, sizeof(SmtpOutMsg)); /* just to be shure... */
free(Msg);
}
-eNextState SMTP_C_Timeout(void *Data);
-eNextState SMTP_C_ConnFail(void *Data);
-eNextState SMTP_C_DispatchReadDone(void *Data);
-eNextState SMTP_C_DispatchWriteDone(void *Data);
-eNextState SMTP_C_Terminate(void *Data);
+eNextState SMTP_C_Shutdown(AsyncIO *IO);
+eNextState SMTP_C_Timeout(AsyncIO *IO);
+eNextState SMTP_C_ConnFail(AsyncIO *IO);
+eNextState SMTP_C_DispatchReadDone(AsyncIO *IO);
+eNextState SMTP_C_DispatchWriteDone(AsyncIO *IO);
+eNextState SMTP_C_DNSFail(AsyncIO *IO);
+eNextState SMTP_C_Terminate(AsyncIO *IO);
eReadState SMTP_C_ReadServerStatus(AsyncIO *IO);
-typedef eNextState (*SMTPReadHandler)(SmtpOutMsg *Msg);
-typedef eNextState (*SMTPSendHandler)(SmtpOutMsg *Msg);
+eNextState mx_connect_ip(AsyncIO *IO);
+eNextState get_one_mx_host_ip(AsyncIO *IO);
+/******************************************************************************
+ * So, we're finished with sending (regardless of success or failure) *
+ * This Message might be referenced by several Queue-Items, if we're the last,*
+ * we need to free the memory and send bounce messages (on terminal failure) *
+ * else we just free our SMTP-Message struct. *
+ ******************************************************************************/
+void FinalizeMessageSend(SmtpOutMsg *Msg)
+{
+ int IDestructQueItem;
+ int nRemain;
+ StrBuf *MsgData;
+ AsyncIO *IO = &Msg->IO;
-#define SMTP_ERROR(WHICH_ERR, ERRSTR) do {\
- SendMsg->MyQEntry->Status = WHICH_ERR; \
- StrBufAppendBufPlain(SendMsg->MyQEntry->StatusMessage, HKEY(ERRSTR), 0); \
- return eAbort; } \
- while (0)
+ IDestructQueItem = DecreaseQReference(Msg->MyQItem);
-#define SMTP_VERROR(WHICH_ERR) do {\
- SendMsg->MyQEntry->Status = WHICH_ERR; \
- StrBufPlain(SendMsg->MyQEntry->StatusMessage, \
- ChrPtr(SendMsg->IO.IOBuf) + 4, \
- StrLength(SendMsg->IO.IOBuf) - 4); \
- return eAbort; } \
- while (0)
+ nRemain = CountActiveQueueEntries(Msg->MyQItem);
-#define SMTP_IS_STATE(WHICH_STATE) (ChrPtr(SendMsg->IO.IOBuf)[0] == WHICH_STATE)
+ if ((nRemain > 0) || IDestructQueItem)
+ MsgData = SerializeQueueItem(Msg->MyQItem);
+ else
+ MsgData = NULL;
-#define SMTP_DBG_SEND() CtdlLogPrintf(CTDL_DEBUG, "SMTP client[%ld]: > %s\n", SendMsg->n, ChrPtr(SendMsg->IO.IOBuf))
-#define SMTP_DBG_READ() CtdlLogPrintf(CTDL_DEBUG, "SMTP client[%ld]: < %s\n", SendMsg->n, ChrPtr(SendMsg->IO.IOBuf))
+ /*
+ * Uncompleted delivery instructions remain, so delete the old
+ * instructions and replace with the updated ones.
+ */
+ EVS_syslog(LOG_DEBUG, "SMTPQD: %ld", Msg->MyQItem->QueMsgID);
+ CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, &Msg->MyQItem->QueMsgID, 1, "");
+ if (IDestructQueItem)
+ smtpq_do_bounce(Msg->MyQItem,Msg->msgtext);
-void FinalizeMessageSend(SmtpOutMsg *Msg)
-{
- if (DecreaseQReference(Msg->MyQItem))
+ if (nRemain > 0)
{
- int nRemain;
- StrBuf *MsgData;
-
- nRemain = CountActiveQueueEntries(Msg->MyQItem);
-
- MsgData = SerializeQueueItem(Msg->MyQItem);
- /*
- * Uncompleted delivery instructions remain, so delete the old
- * instructions and replace with the updated ones.
- */
- CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, &Msg->MyQItem->QueMsgID, 1, "");
- smtpq_do_bounce(Msg->MyQItem,
- Msg->msgtext);
- if (nRemain > 0) {
- struct CtdlMessage *msg;
- msg = malloc(sizeof(struct CtdlMessage));
- memset(msg, 0, sizeof(struct CtdlMessage));
- msg->cm_magic = CTDLMESSAGE_MAGIC;
- msg->cm_anon_type = MES_NORMAL;
- msg->cm_format_type = FMT_RFC822;
- msg->cm_fields['M'] = SmashStrBuf(&MsgData);
- /* Generate 'bounce' messages */
- smtp_do_bounce(msg->cm_fields['M'],
- Msg->msgtext);
-
+ struct CtdlMessage *msg;
+ msg = malloc(sizeof(struct CtdlMessage));
+ memset(msg, 0, sizeof(struct CtdlMessage));
+ msg->cm_magic = CTDLMESSAGE_MAGIC;
+ msg->cm_anon_type = MES_NORMAL;
+ msg->cm_format_type = FMT_RFC822;
+ msg->cm_fields['M'] = SmashStrBuf(&MsgData);
+ Msg->MyQItem->QueMsgID =
CtdlSubmitMsg(msg, NULL, SMTP_SPOOLOUT_ROOM, QP_EADDR);
- CtdlFreeMessage(msg);
- }
- else
- CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, &Msg->MyQItem->MessageID, 1, "");
-
- RemoveQItem(Msg->MyQItem);
+ EVS_syslog(LOG_DEBUG, "SMTPQ: %ld", Msg->MyQItem->QueMsgID);
+ CtdlFreeMessage(msg);
+ }
+ else {
+ CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM,
+ &Msg->MyQItem->MessageID,
+ 1,
+ "");
+ FreeStrBuf(&MsgData);
}
+ RemoveContext(Msg->IO.CitContext);
+ if (IDestructQueItem)
+ RemoveQItem(Msg->MyQItem);
DeleteSmtpOutMsg(Msg);
}
-
-
-
-void get_one_mx_host_ip_done(void *Ctx,
- int status,
- int timeouts,
- struct hostent *hostent)
+eNextState FailOneAttempt(AsyncIO *IO)
{
- AsyncIO *IO = Ctx;
SmtpOutMsg *SendMsg = IO->Data;
- if ((status == ARES_SUCCESS) && (hostent != NULL) ) {
- CtdlLogPrintf(CTDL_DEBUG,
- "SMTP client[%ld]: connecting to %s [ip]: %d ...\n",
- SendMsg->n,
- SendMsg->mx_host,
- SendMsg->IO.dport);
-
- SendMsg->MyQEntry->Status = 5;
- StrBufPrintf(SendMsg->MyQEntry->StatusMessage,
- "Timeout while connecting %s",
- SendMsg->mx_host);
-
- SendMsg->IO.HEnt = hostent;
- InitEventIO(IO, SendMsg,
- SMTP_C_DispatchReadDone,
- SMTP_C_DispatchWriteDone,
- SMTP_C_Terminate,
- SMTP_C_Timeout,
- SMTP_C_ConnFail,
- SMTP_C_ReadServerStatus,
- SMTP_C_ConnTimeout,
- SMTP_C_ReadTimeouts[0],
- 1);
- }
-}
+ if (SendMsg->MyQEntry->Status == 2)
+ return eAbort;
-const unsigned short DefaultMXPort = 25;
-void get_one_mx_host_ip(SmtpOutMsg *SendMsg)
-{
- //char *endpart;
- //char buf[SIZ];
-
- SendMsg->IO.dport = DefaultMXPort;
-
-
-/* TODO: Relay!
- *SendMsg->mx_user = '\0';
- *SendMsg->mx_pass = '\0';
- if (num_tokens(buf, '@') > 1) {
- strcpy (SendMsg->mx_user, buf);
- endpart = strrchr(SendMsg->mx_user, '@');
- *endpart = '\0';
- strcpy (SendMsg->mx_host, endpart + 1);
- endpart = strrchr(SendMsg->mx_user, ':');
- if (endpart != NULL) {
- strcpy(SendMsg->mx_pass, endpart+1);
- *endpart = '\0';
- }
-
- endpart = strrchr(SendMsg->mx_host, ':');
- if (endpart != 0){
- *endpart = '\0';
- strcpy(SendMsg->mx_port, endpart + 1);
- }
- }
- else
-*/
- SendMsg->mx_host = SendMsg->CurrMX->host;
- SendMsg->CurrMX = SendMsg->CurrMX->next;
-
- CtdlLogPrintf(CTDL_DEBUG,
- "SMTP client[%ld]: looking up %s : %d ...\n",
- SendMsg->n,
- SendMsg->mx_host);
-
- ares_gethostbyname(SendMsg->IO.DNSChannel,
- SendMsg->mx_host,
- AF_INET6, /* it falls back to ipv4 in doubt... */
- get_one_mx_host_ip_done,
- &SendMsg->IO);
-}
+ /*
+ * possible ways here:
+ * - connection timeout
+ * - dns lookup failed
+ */
+ StopClientWatchers(IO);
+ if (SendMsg->pCurrRelay != NULL)
+ SendMsg->pCurrRelay = SendMsg->pCurrRelay->Next;
-eNextState smtp_resolve_mx_done(void *data)
-{
- AsyncIO *IO = data;
- SmtpOutMsg * SendMsg = IO->Data;
-
- SendMsg->IO.SendBuf.Buf = NewStrBufPlain(NULL, 1024);
- SendMsg->IO.RecvBuf.Buf = NewStrBufPlain(NULL, 1024);
- SendMsg->IO.IOBuf = NewStrBuf();
- SendMsg->IO.ErrMsg = SendMsg->MyQEntry->StatusMessage;
-
- SendMsg->CurrMX = SendMsg->AllMX = IO->VParsedDNSReply;
- //// TODO: should we remove the current ares context???
- get_one_mx_host_ip(SendMsg);
- return 0;
-}
-
-
-int resolve_mx_records(void *Ctx)
-{
- SmtpOutMsg * SendMsg = Ctx;
-
- if (!QueueQuery(ns_t_mx,
- SendMsg->node,
- &SendMsg->IO,
- smtp_resolve_mx_done))
- {
- SendMsg->MyQEntry->Status = 5;
- StrBufPrintf(SendMsg->MyQEntry->StatusMessage,
- "No MX hosts found for <%s>", SendMsg->node);
- return 0; ///////TODO: abort!
+ if (SendMsg->pCurrRelay == NULL) {
+ EVS_syslog(LOG_DEBUG, "SMTP: %s Aborting\n", __FUNCTION__);
+ return eAbort;
}
- return 0;
-}
-
-
-int smtp_resolve_recipients(SmtpOutMsg *SendMsg)
-{
- const char *ptr;
- char buf[1024];
- int scan_done;
- int lp, rp;
- int i;
-
- if ((SendMsg==NULL) ||
- (SendMsg->MyQEntry == NULL) ||
- (StrLength(SendMsg->MyQEntry->Recipient) == 0)) {
- return 0;
+ if (SendMsg->pCurrRelay->IsIP) {
+ EVS_syslog(LOG_DEBUG, "SMTP: %s connecting IP\n", __FUNCTION__);
+ return mx_connect_ip(IO);
}
-
- /* Parse out the host portion of the recipient address */
- process_rfc822_addr(ChrPtr(SendMsg->MyQEntry->Recipient),
- SendMsg->user,
- SendMsg->node,
- SendMsg->name);
-
- CtdlLogPrintf(CTDL_DEBUG, "SMTP client[%ld]: Attempting delivery to <%s> @ <%s> (%s)\n",
- SendMsg->n, SendMsg->user, SendMsg->node, SendMsg->name);
- /* If no envelope_from is supplied, extract one from the message */
- if ( (SendMsg->envelope_from == NULL) ||
- (IsEmptyStr(SendMsg->envelope_from)) ) {
- SendMsg->mailfrom[0] = '\0';
- scan_done = 0;
- ptr = ChrPtr(SendMsg->msgtext);
- do {
- if (ptr = cmemreadline(ptr, buf, sizeof buf), *ptr == 0) {
- scan_done = 1;
- }
- if (!strncasecmp(buf, "From:", 5)) {
- safestrncpy(SendMsg->mailfrom, &buf[5], sizeof SendMsg->mailfrom);
- striplt(SendMsg->mailfrom);
- for (i=0; SendMsg->mailfrom[i]; ++i) {
- if (!isprint(SendMsg->mailfrom[i])) {
- strcpy(&SendMsg->mailfrom[i], &SendMsg->mailfrom[i+1]);
- i=0;
- }
- }
-
- /* Strip out parenthesized names */
- lp = (-1);
- rp = (-1);
- for (i=0; !IsEmptyStr(SendMsg->mailfrom + i); ++i) {
- if (SendMsg->mailfrom[i] == '(') lp = i;
- if (SendMsg->mailfrom[i] == ')') rp = i;
- }
- if ((lp>0)&&(rp>lp)) {
- strcpy(&SendMsg->mailfrom[lp-1], &SendMsg->mailfrom[rp+1]);
- }
-
- /* Prefer brokketized names */
- lp = (-1);
- rp = (-1);
- for (i=0; !IsEmptyStr(SendMsg->mailfrom + i); ++i) {
- if (SendMsg->mailfrom[i] == '<') lp = i;
- if (SendMsg->mailfrom[i] == '>') rp = i;
- }
- if ( (lp>=0) && (rp>lp) ) {
- SendMsg->mailfrom[rp] = 0;
- memmove(SendMsg->mailfrom,
- &SendMsg->mailfrom[lp + 1],
- rp - lp);
- }
-
- scan_done = 1;
- }
- } while (scan_done == 0);
- if (IsEmptyStr(SendMsg->mailfrom)) strcpy(SendMsg->mailfrom, "someone@somewhere.org");
- stripallbut(SendMsg->mailfrom, '<', '>');
- SendMsg->envelope_from = SendMsg->mailfrom;
+ else {
+ EVS_syslog(LOG_DEBUG, "SMTP: %s resolving next MX Record\n", __FUNCTION__);
+ return get_one_mx_host_ip(IO);
}
-
- return 1;
}
-
-void smtp_try(OneQueItem *MyQItem,
- MailQEntry *MyQEntry,
- StrBuf *MsgText,
- int KeepMsgText, /* KeepMsgText allows us to use MsgText as ours. */
- int MsgCount)
+void SetConnectStatus(AsyncIO *IO)
{
- SmtpOutMsg * SendMsg;
+
+ SmtpOutMsg *SendMsg = IO->Data;
+ char buf[256];
+ void *src;
- SendMsg = (SmtpOutMsg *) malloc(sizeof(SmtpOutMsg));
- memset(SendMsg, 0, sizeof(SmtpOutMsg));
- SendMsg->IO.sock = (-1);
- SendMsg->n = MsgCount++;
- SendMsg->MyQEntry = MyQEntry;
- SendMsg->MyQItem = MyQItem;
- SendMsg->IO.Data = SendMsg;
- if (KeepMsgText)
- SendMsg->msgtext = MsgText;
- else
- SendMsg->msgtext = NewStrBufDup(MsgText);
+ buf[0] = '\0';
- if (smtp_resolve_recipients(SendMsg)) {
- QueueEventContext(SendMsg,
- &SendMsg->IO,
- resolve_mx_records);
+ if (IO->ConnectMe->IPv6) {
+ src = &IO->ConnectMe->Addr.sin6_addr;
}
else {
- if ((SendMsg==NULL) ||
- (SendMsg->MyQEntry == NULL)) {
- SendMsg->MyQEntry->Status = 5;
- StrBufPlain(SendMsg->MyQEntry->StatusMessage,
- HKEY("Invalid Recipient!"));
- }
- FinalizeMessageSend(SendMsg);
- }
-}
-
+ struct sockaddr_in *addr = (struct sockaddr_in *)&IO->ConnectMe->Addr;
-
-
-
-/*****************************************************************************/
-/* SMTP CLIENT STATE CALLBACKS */
-/*****************************************************************************/
-eNextState SMTPC_read_greeting(SmtpOutMsg *SendMsg)
-{
- /* Process the SMTP greeting from the server */
- SMTP_DBG_READ();
-
- if (!SMTP_IS_STATE('2')) {
- if (SMTP_IS_STATE('4'))
- SMTP_VERROR(4);
- else
- SMTP_VERROR(5);
+ src = &addr->sin_addr.s_addr;
}
- return eSendReply;
-}
-
-eNextState SMTPC_send_EHLO(SmtpOutMsg *SendMsg)
-{
- /* At this point we know we are talking to a real SMTP server */
- /* Do a EHLO command. If it fails, try the HELO command. */
- StrBufPrintf(SendMsg->IO.SendBuf.Buf,
- "EHLO %s\r\n", config.c_fqdn);
+ inet_ntop((IO->ConnectMe->IPv6)?AF_INET6:AF_INET,
+ src,
+ buf,
+ sizeof(buf));
- SMTP_DBG_SEND();
- return eReadMessage;
-}
+ if (SendMsg->mx_host == NULL)
+ SendMsg->mx_host = "<no MX-Record>";
-eNextState SMTPC_read_EHLO_reply(SmtpOutMsg *SendMsg)
-{
- SMTP_DBG_READ();
+ EVS_syslog(LOG_DEBUG,
+ "SMTP client[%ld]: connecting to %s [%s]:%d ...\n",
+ SendMsg->n,
+ SendMsg->mx_host,
+ buf,
+ SendMsg->IO.ConnectMe->Port);
- if (SMTP_IS_STATE('2')) {
- SendMsg->State ++;
- if (IsEmptyStr(SendMsg->mx_user))
- SendMsg->State ++; /* Skip auth... */
- }
- /* else we fall back to 'helo' */
- return eSendReply;
+ SendMsg->MyQEntry->Status = 5;
+ StrBufPrintf(SendMsg->MyQEntry->StatusMessage,
+ "Timeout while connecting %s [%s]:%d ",
+ SendMsg->mx_host,
+ buf,
+ SendMsg->IO.ConnectMe->Port);
+ SendMsg->IO.NextState = eConnect;
}
-eNextState STMPC_send_HELO(SmtpOutMsg *SendMsg)
+/*****************************************************************************
+ * So we connect our Relay IP here. *
+ *****************************************************************************/
+eNextState mx_connect_ip(AsyncIO *IO)
{
- StrBufPrintf(SendMsg->IO.SendBuf.Buf,
- "HELO %s\r\n", config.c_fqdn);
-
- SMTP_DBG_SEND();
- return eReadMessage;
-}
+ SmtpOutMsg *SendMsg = IO->Data;
-eNextState SMTPC_read_HELO_reply(SmtpOutMsg *SendMsg)
-{
- SMTP_DBG_READ();
+ EVS_syslog(LOG_DEBUG, "SMTP: %s\n", __FUNCTION__);
+
+ IO->ConnectMe = SendMsg->pCurrRelay;
+ /* Bypass the ns lookup result like this: IO->Addr.sin_addr.s_addr = inet_addr("127.0.0.1"); */
- if (!SMTP_IS_STATE('2')) {
- if (SMTP_IS_STATE('4'))
- SMTP_VERROR(4);
- else
- SMTP_VERROR(5);
- }
- if (!IsEmptyStr(SendMsg->mx_user))
- SendMsg->State ++; /* Skip auth... */
- return eSendReply;
-}
+ SetConnectStatus(IO);
-eNextState SMTPC_send_auth(SmtpOutMsg *SendMsg)
-{
- char buf[SIZ];
- char encoded[1024];
-
- /* Do an AUTH command if necessary */
- sprintf(buf, "%s%c%s%c%s",
- SendMsg->mx_user, '\0',
- SendMsg->mx_user, '\0',
- SendMsg->mx_pass);
- CtdlEncodeBase64(encoded, buf,
- strlen(SendMsg->mx_user) +
- strlen(SendMsg->mx_user) +
- strlen(SendMsg->mx_pass) + 2, 0);
- StrBufPrintf(SendMsg->IO.SendBuf.Buf,
- "AUTH PLAIN %s\r\n", encoded);
-
- SMTP_DBG_SEND();
- return eReadMessage;
+ return EvConnectSock(IO, SendMsg,
+ SMTP_C_ConnTimeout,
+ SMTP_C_ReadTimeouts[0],
+ 1);
}
-eNextState SMTPC_read_auth_reply(SmtpOutMsg *SendMsg)
+eNextState get_one_mx_host_ip_done(AsyncIO *IO)
{
- /* Do an AUTH command if necessary */
-
- SMTP_DBG_READ();
-
- if (!SMTP_IS_STATE('2')) {
- if (SMTP_IS_STATE('4'))
- SMTP_VERROR(4);
- else
- SMTP_VERROR(5);
+ SmtpOutMsg *SendMsg = IO->Data;
+ struct hostent *hostent;
+
+ QueryCbDone(IO);
+
+ hostent = SendMsg->HostLookup.VParsedDNSReply;
+ if ((SendMsg->HostLookup.DNSStatus == ARES_SUCCESS) &&
+ (hostent != NULL) ) {
+ memset(&SendMsg->pCurrRelay->Addr, 0, sizeof(struct in6_addr));
+ if (SendMsg->pCurrRelay->IPv6) {
+ memcpy(&SendMsg->pCurrRelay->Addr.sin6_addr.s6_addr,
+ &hostent->h_addr_list[0],
+ sizeof(struct in6_addr));
+
+ SendMsg->pCurrRelay->Addr.sin6_family = hostent->h_addrtype;
+ SendMsg->pCurrRelay->Addr.sin6_port = htons(DefaultMXPort);
+ }
+ else {
+ struct sockaddr_in *addr = (struct sockaddr_in*) &SendMsg->pCurrRelay->Addr;
+ /* Bypass the ns lookup result like this: IO->Addr.sin_addr.s_addr = inet_addr("127.0.0.1"); */
+// addr->sin_addr.s_addr = htonl((uint32_t)&hostent->h_addr_list[0]);
+ memcpy(&addr->sin_addr.s_addr,
+ hostent->h_addr_list[0],
+ sizeof(uint32_t));
+
+ addr->sin_family = hostent->h_addrtype;
+ addr->sin_port = htons(DefaultMXPort);
+
+ }
+ SendMsg->mx_host = SendMsg->pCurrRelay->Host;
+ return mx_connect_ip(IO);
}
- return eSendReply;
-}
-
-eNextState SMTPC_send_FROM(SmtpOutMsg *SendMsg)
-{
- /* previous command succeeded, now try the MAIL FROM: command */
- StrBufPrintf(SendMsg->IO.SendBuf.Buf,
- "MAIL FROM:<%s>\r\n",
- SendMsg->envelope_from);
-
- SMTP_DBG_SEND();
- return eReadMessage;
+ else // TODO: here we need to find out whether there are more mx'es, backup relay, and so on
+ return FailOneAttempt(IO);
}
-eNextState SMTPC_read_FROM_reply(SmtpOutMsg *SendMsg)
+eNextState get_one_mx_host_ip(AsyncIO *IO)
{
- SMTP_DBG_READ();
-
- if (!SMTP_IS_STATE('2')) {
- if (SMTP_IS_STATE('4'))
- SMTP_VERROR(4);
- else
- SMTP_VERROR(5);
+ SmtpOutMsg * SendMsg = IO->Data;
+ /*
+ * here we start with the lookup of one host. it might be...
+ * - the relay host *sigh*
+ * - the direct hostname if there was no mx record
+ * - one of the mx'es
+ */
+
+ InitC_ares_dns(IO);
+
+ EVS_syslog(LOG_DEBUG, "SMTP: %s\n", __FUNCTION__);
+
+ EVS_syslog(LOG_DEBUG,
+ "SMTP client[%ld]: looking up %s-Record %s : %d ...\n",
+ SendMsg->n,
+ (SendMsg->pCurrRelay->IPv6)? "aaaa": "a",
+ SendMsg->pCurrRelay->Host,
+ SendMsg->pCurrRelay->Port);
+
+ if (!QueueQuery((SendMsg->pCurrRelay->IPv6)? ns_t_aaaa : ns_t_a,
+ SendMsg->pCurrRelay->Host,
+ &SendMsg->IO,
+ &SendMsg->HostLookup,
+ get_one_mx_host_ip_done))
+ {
+ SendMsg->MyQEntry->Status = 5;
+ StrBufPrintf(SendMsg->MyQEntry->StatusMessage,
+ "No MX hosts found for <%s>", SendMsg->node);
+ SendMsg->IO.NextState = eTerminateConnection;
+ return IO->NextState;
}
- return eSendReply;
+ IO->NextState = eReadDNSReply;
+ return IO->NextState;
}
-eNextState SMTPC_send_RCPT(SmtpOutMsg *SendMsg)
+/*****************************************************************************
+ * here we try to find out about the MX records for our recipients. *
+ *****************************************************************************/
+eNextState smtp_resolve_mx_record_done(AsyncIO *IO)
{
- /* MAIL succeeded, now try the RCPT To: command */
- StrBufPrintf(SendMsg->IO.SendBuf.Buf,
- "RCPT TO:<%s@%s>\r\n",
- SendMsg->user,
- SendMsg->node);
-
- SMTP_DBG_SEND();
- return eReadMessage;
-}
-
-eNextState SMTPC_read_RCPT_reply(SmtpOutMsg *SendMsg)
-{
- SMTP_DBG_READ();
+ SmtpOutMsg * SendMsg = IO->Data;
+ ParsedURL **pp;
- if (!SMTP_IS_STATE('2')) {
- if (SMTP_IS_STATE('4'))
- SMTP_VERROR(4);
- else
- SMTP_VERROR(5);
- }
- return eSendReply;
-}
+ QueryCbDone(IO);
-eNextState SMTPC_send_DATAcmd(SmtpOutMsg *SendMsg)
-{
- /* RCPT succeeded, now try the DATA command */
- StrBufPlain(SendMsg->IO.SendBuf.Buf,
- HKEY("DATA\r\n"));
+ EVS_syslog(LOG_DEBUG, "SMTP: %s\n", __FUNCTION__);
+ pp = &SendMsg->Relay;
+ while ((pp != NULL) && (*pp != NULL) && ((*pp)->Next != NULL))
+ pp = &(*pp)->Next;
- SMTP_DBG_SEND();
- return eReadMessage;
+ if ((IO->DNS.Query->DNSStatus == ARES_SUCCESS) &&
+ (IO->DNS.Query->VParsedDNSReply != NULL))
+ { /* ok, we found mx records. */
+ SendMsg->IO.ErrMsg = SendMsg->MyQEntry->StatusMessage;
+
+ SendMsg->CurrMX = SendMsg->AllMX
+ = IO->DNS.Query->VParsedDNSReply;
+ while (SendMsg->CurrMX) {
+ int i;
+ for (i = 0; i < 2; i++) {
+ ParsedURL *p;
+
+ p = (ParsedURL*) malloc(sizeof(ParsedURL));
+ memset(p, 0, sizeof(ParsedURL));
+ p->IsIP = 0;
+ p->Port = DefaultMXPort;
+ p->IPv6 = i == 1;
+ p->Host = SendMsg->CurrMX->host;
+
+ *pp = p;
+ pp = &p->Next;
+ }
+ SendMsg->CurrMX = SendMsg->CurrMX->next;
+ }
+ SendMsg->CXFlags = SendMsg->CXFlags & F_HAVE_MX;
+ }
+ else { /* else fall back to the plain hostname */
+ int i;
+ for (i = 0; i < 2; i++) {
+ ParsedURL *p;
+
+ p = (ParsedURL*) malloc(sizeof(ParsedURL));
+ memset(p, 0, sizeof(ParsedURL));
+ p->IsIP = 0;
+ p->Port = DefaultMXPort;
+ p->IPv6 = i == 1;
+ p->Host = SendMsg->node;
+
+ *pp = p;
+ pp = &p->Next;
+ }
+ SendMsg->CXFlags = SendMsg->CXFlags & F_DIRECT;
+ }
+ *pp = SendMsg->MyQItem->FallBackHost;
+ SendMsg->pCurrRelay = SendMsg->Relay;
+ return get_one_mx_host_ip(IO);
}
-eNextState SMTPC_read_DATAcmd_reply(SmtpOutMsg *SendMsg)
+eNextState resolve_mx_records(AsyncIO *IO)
{
- SMTP_DBG_READ();
+ SmtpOutMsg * SendMsg = IO->Data;
- if (!SMTP_IS_STATE('3')) {
- if (SMTP_IS_STATE('4'))
- SMTP_VERROR(3);
- else
- SMTP_VERROR(5);
+ EVS_syslog(LOG_DEBUG, "SMTP: %s\n", __FUNCTION__);
+ /* start resolving MX records here. */
+ if (!QueueQuery(ns_t_mx,
+ SendMsg->node,
+ &SendMsg->IO,
+ &SendMsg->MxLookup,
+ smtp_resolve_mx_record_done))
+ {
+ SendMsg->MyQEntry->Status = 5;
+ StrBufPrintf(SendMsg->MyQEntry->StatusMessage,
+ "No MX hosts found for <%s>", SendMsg->node);
+ return IO->NextState;
}
- return eSendReply;
+ SendMsg->IO.NextState = eReadDNSReply;
+ return IO->NextState;
}
-eNextState SMTPC_send_data_body(SmtpOutMsg *SendMsg)
-{
- StrBuf *Buf;
- /* If we reach this point, the server is expecting data.*/
- Buf = SendMsg->IO.SendBuf.Buf;
- SendMsg->IO.SendBuf.Buf = SendMsg->msgtext;
- SendMsg->msgtext = Buf;
- //// TODO timeout like that: (SendMsg->msg_size / 128) + 50);
- SendMsg->State ++;
- return eSendMore;
-}
+/******************************************************************************
+ * so, we're going to start a SMTP delivery. lets get it on. *
+ ******************************************************************************/
-eNextState SMTPC_send_terminate_data_body(SmtpOutMsg *SendMsg)
+SmtpOutMsg *new_smtp_outmsg(OneQueItem *MyQItem,
+ MailQEntry *MyQEntry,
+ int MsgCount)
{
- StrBuf *Buf;
+ SmtpOutMsg * SendMsg;
- Buf = SendMsg->IO.SendBuf.Buf;
- SendMsg->IO.SendBuf.Buf = SendMsg->msgtext;
- SendMsg->msgtext = Buf;
+ SendMsg = (SmtpOutMsg *) malloc(sizeof(SmtpOutMsg));
+ memset(SendMsg, 0, sizeof(SmtpOutMsg));
- StrBufPlain(SendMsg->IO.SendBuf.Buf,
- HKEY(".\r\n"));
+ SendMsg->n = MsgCount;
+ SendMsg->MyQEntry = MyQEntry;
+ SendMsg->MyQItem = MyQItem;
+ SendMsg->pCurrRelay = MyQItem->URL;
- return eReadMessage;
+ SendMsg->IO.Data = SendMsg;
-}
+ SendMsg->IO.SendDone = SMTP_C_DispatchWriteDone;
+ SendMsg->IO.ReadDone = SMTP_C_DispatchReadDone;
+ SendMsg->IO.Terminate = SMTP_C_Terminate;
+ SendMsg->IO.LineReader = SMTP_C_ReadServerStatus;
+ SendMsg->IO.ConnFail = SMTP_C_ConnFail;
+ SendMsg->IO.DNS.Fail = SMTP_C_DNSFail;
+ SendMsg->IO.Timeout = SMTP_C_Timeout;
+ SendMsg->IO.ShutdownAbort = SMTP_C_Shutdown;
-eNextState SMTPC_read_data_body_reply(SmtpOutMsg *SendMsg)
-{
- SMTP_DBG_READ();
+ SendMsg->IO.SendBuf.Buf = NewStrBufPlain(NULL, 1024);
+ SendMsg->IO.RecvBuf.Buf = NewStrBufPlain(NULL, 1024);
+ SendMsg->IO.IOBuf = NewStrBuf();
- if (!SMTP_IS_STATE('2')) {
- if (SMTP_IS_STATE('4'))
- SMTP_VERROR(4);
- else
- SMTP_VERROR(5);
- }
+ SendMsg->IO.NextState = eReadMessage;
- /* We did it! */
- StrBufPlain(SendMsg->MyQEntry->StatusMessage,
- &ChrPtr(SendMsg->IO.RecvBuf.Buf)[4],
- StrLength(SendMsg->IO.RecvBuf.Buf) - 4);
- SendMsg->MyQEntry->Status = 2;
- return eSendReply;
+ return SendMsg;
}
-eNextState SMTPC_send_QUIT(SmtpOutMsg *SendMsg)
+void smtp_try_one_queue_entry(OneQueItem *MyQItem,
+ MailQEntry *MyQEntry,
+ StrBuf *MsgText,
+ int KeepMsgText, /* KeepMsgText allows us to use MsgText as ours. */
+ int MsgCount)
{
- StrBufPlain(SendMsg->IO.SendBuf.Buf,
- HKEY("QUIT\r\n"));
+ AsyncIO *IO;
+ SmtpOutMsg *SendMsg;
+
+ syslog(LOG_DEBUG, "SMTP: %s\n", __FUNCTION__);
- SMTP_DBG_SEND();
- return eReadMessage;
+ SendMsg = new_smtp_outmsg(MyQItem, MyQEntry, MsgCount);
+ IO = &SendMsg->IO;
+ if (KeepMsgText) SendMsg->msgtext = MsgText;
+ else SendMsg->msgtext = NewStrBufDup(MsgText);
+
+ if (smtp_resolve_recipients(SendMsg)) {
+ CitContext *SubC;
+ SubC = CloneContext (CC);
+ SubC->session_specific_data = (char*) SendMsg;
+ SendMsg->IO.CitContext = SubC;
+
+ safestrncpy(SubC->cs_host, SendMsg->node, sizeof(SubC->cs_host));
+ syslog(LOG_DEBUG, "SMTP Starting: [%ld] <%s> CC <%d> \n",
+ SendMsg->MyQItem->MessageID,
+ ChrPtr(SendMsg->MyQEntry->Recipient),
+ ((CitContext*)SendMsg->IO.CitContext)->cs_pid);
+ if (SendMsg->pCurrRelay == NULL)
+ QueueEventContext(&SendMsg->IO,
+ resolve_mx_records);
+ else { /* oh... via relay host */
+ if (SendMsg->pCurrRelay->IsIP) {
+ QueueEventContext(&SendMsg->IO,
+ mx_connect_ip);
+ }
+ else { /* uneducated admin has chosen to add DNS to the equation... */
+ QueueEventContext(&SendMsg->IO,
+ get_one_mx_host_ip);
+ }
+ }
+ }
+ else {
+ /* No recipients? well fail then. */
+ if ((SendMsg==NULL) ||
+ (SendMsg->MyQEntry == NULL)) {
+ SendMsg->MyQEntry->Status = 5;
+ StrBufPlain(SendMsg->MyQEntry->StatusMessage,
+ HKEY("Invalid Recipient!"));
+ }
+ FinalizeMessageSend(SendMsg);
+ }
}
-eNextState SMTPC_read_QUIT_reply(SmtpOutMsg *SendMsg)
-{
- SMTP_DBG_READ();
- CtdlLogPrintf(CTDL_INFO, "SMTP client[%ld]: delivery to <%s> @ <%s> (%s) succeeded\n",
- SendMsg->n, SendMsg->user, SendMsg->node, SendMsg->name);
- return eTerminateConnection;
-}
-eNextState SMTPC_read_dummy(SmtpOutMsg *SendMsg)
-{
- return eSendReply;
-}
-eNextState SMTPC_send_dummy(SmtpOutMsg *SendMsg)
-{
- return eReadMessage;
-}
/*****************************************************************************/
/* SMTP CLIENT DISPATCHER */
/*****************************************************************************/
-SMTPReadHandler ReadHandlers[eMaxSMTPC] = {
- SMTPC_read_greeting,
- SMTPC_read_EHLO_reply,
- SMTPC_read_HELO_reply,
- SMTPC_read_auth_reply,
- SMTPC_read_FROM_reply,
- SMTPC_read_RCPT_reply,
- SMTPC_read_DATAcmd_reply,
- SMTPC_read_dummy,
- SMTPC_read_data_body_reply,
- SMTPC_read_QUIT_reply
-};
-SMTPSendHandler SendHandlers[eMaxSMTPC] = {
- SMTPC_send_dummy, /* we don't send a greeting, the server does... */
- SMTPC_send_EHLO,
- STMPC_send_HELO,
- SMTPC_send_auth,
- SMTPC_send_FROM,
- SMTPC_send_RCPT,
- SMTPC_send_DATAcmd,
- SMTPC_send_data_body,
- SMTPC_send_terminate_data_body,
- SMTPC_send_QUIT
-};
-eNextState SMTP_C_DispatchReadDone(void *Data)
+
+void SMTPSetTimeout(eNextState NextTCPState, SmtpOutMsg *pMsg)
+{
+ double Timeout = 0.0;
+ AsyncIO *IO = &pMsg->IO;
+
+ EVS_syslog(LOG_DEBUG, "SMTP: %s\n", __FUNCTION__);
+
+ switch (NextTCPState) {
+ case eSendFile:
+ case eSendReply:
+ case eSendMore:
+ Timeout = SMTP_C_SendTimeouts[pMsg->State];
+ if (pMsg->State == eDATABody) {
+ /* if we're sending a huge message, we need more time. */
+ Timeout += StrLength(pMsg->msgtext) / 1024;
+ }
+ break;
+ case eReadMessage:
+ Timeout = SMTP_C_ReadTimeouts[pMsg->State];
+ if (pMsg->State == eDATATerminateBody) {
+ /*
+ * some mailservers take a nap before accepting the message
+ * content inspection and such.
+ */
+ Timeout += StrLength(pMsg->msgtext) / 1024;
+ }
+ break;
+ case eSendDNSQuery:
+ case eReadDNSReply:
+ case eDBQuery:
+ case eReadFile:
+ case eReadMore:
+ case eReadPayload:
+ case eConnect:
+ case eTerminateConnection:
+ case eAbort:
+ return;
+ }
+ SetNextTimeout(&pMsg->IO, Timeout);
+}
+eNextState SMTP_C_DispatchReadDone(AsyncIO *IO)
{
- SmtpOutMsg *pMsg = Data;
- eNextState rc = ReadHandlers[pMsg->State](pMsg);
- pMsg->State++;
+ EVS_syslog(LOG_DEBUG, "SMTP: %s\n", __FUNCTION__);
+ SmtpOutMsg *pMsg = IO->Data;
+ eNextState rc;
+
+ rc = ReadHandlers[pMsg->State](pMsg);
+ if (rc != eAbort)
+ {
+ pMsg->State++;
+ SMTPSetTimeout(rc, pMsg);
+ }
return rc;
}
-eNextState SMTP_C_DispatchWriteDone(void *Data)
+eNextState SMTP_C_DispatchWriteDone(AsyncIO *IO)
{
- SmtpOutMsg *pMsg = Data;
- return SendHandlers[pMsg->State](pMsg);
+ EVS_syslog(LOG_DEBUG, "SMTP: %s\n", __FUNCTION__);
+ SmtpOutMsg *pMsg = IO->Data;
+ eNextState rc;
+
+ rc = SendHandlers[pMsg->State](pMsg);
+ SMTPSetTimeout(rc, pMsg);
+ return rc;
}
/*****************************************************************************/
/* SMTP CLIENT ERROR CATCHERS */
/*****************************************************************************/
-eNextState SMTP_C_Terminate(void *Data)
+eNextState SMTP_C_Terminate(AsyncIO *IO)
{
- AsyncIO *IO = Data;
SmtpOutMsg *pMsg = IO->Data;
+
+ EVS_syslog(LOG_DEBUG, "SMTP: %s\n", __FUNCTION__);
FinalizeMessageSend(pMsg);
- return 0;
+ return eAbort;
}
-eNextState SMTP_C_Timeout(void *Data)
+eNextState SMTP_C_Timeout(AsyncIO *IO)
{
- AsyncIO *IO = Data;
SmtpOutMsg *pMsg = IO->Data;
- FinalizeMessageSend(pMsg);
- return 0;
+
+ EVS_syslog(LOG_DEBUG, "SMTP: %s\n", __FUNCTION__);
+ StrBufPlain(IO->ErrMsg, CKEY(ReadErrors[pMsg->State]));
+ return FailOneAttempt(IO);
+}
+eNextState SMTP_C_ConnFail(AsyncIO *IO)
+{
+ SmtpOutMsg *pMsg = IO->Data;
+
+ EVS_syslog(LOG_DEBUG, "SMTP: %s\n", __FUNCTION__);
+ StrBufPlain(IO->ErrMsg, CKEY(ReadErrors[pMsg->State]));
+ return FailOneAttempt(IO);
+}
+eNextState SMTP_C_DNSFail(AsyncIO *IO)
+{
+ SmtpOutMsg *pMsg = IO->Data;
+
+ EVS_syslog(LOG_DEBUG, "SMTP: %s\n", __FUNCTION__);
+ return FailOneAttempt(IO);
}
-eNextState SMTP_C_ConnFail(void *Data)
+eNextState SMTP_C_Shutdown(AsyncIO *IO)
{
- AsyncIO *IO = Data;
+ EVS_syslog(LOG_DEBUG, "SMTP: %s\n", __FUNCTION__);
SmtpOutMsg *pMsg = IO->Data;
+
+ pMsg->MyQEntry->Status = 3;
+ StrBufPlain(pMsg->MyQEntry->StatusMessage, HKEY("server shutdown during message submit."));
FinalizeMessageSend(pMsg);
- return 0;
+ return eAbort;
}
return Finished;
}
-
-#endif
CTDL_MODULE_INIT(smtp_eventclient)
{
return "smtpeventclient";
projects / citadel.git / blobdiff