/* ommail.c
*
* This is an implementation of a mail sending output module.
*
* NOTE: read comments in module-template.h to understand how this file
* works!
*
* File begun on 2008-04-04 by RGerhards
*
* Copyright 2008 Rainer Gerhards and Adiscon GmbH.
*
* This file is part of rsyslog.
*
* Rsyslog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rsyslog 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.
*
* You should have received a copy of the GNU General Public License
* along with Rsyslog. If not, see .
*
* A copy of the GPL can be found in the file "COPYING" in this distribution.
*/
#include "config.h"
#include "rsyslog.h"
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include "syslogd.h"
#include "syslogd-types.h"
#include "srUtils.h"
#include "cfsysline.h"
#include "module-template.h"
#include "errmsg.h"
MODULE_TYPE_OUTPUT
/* internal structures
*/
DEF_OMOD_STATIC_DATA
DEFobjCurrIf(errmsg)
static uchar *pSrv;
static uchar *pszFrom;
static uchar *pszTo;
typedef struct _instanceData {
int iMode; /* 0 - smtp, 1 - sendmail */
union {
struct {
uchar *pszSrv;
uchar *pszSrvPort;
uchar *pszFrom;
uchar *pszTo;
uchar *pszSubject;
char RcvBuf[1024]; /* buffer for receiving server responses */
size_t lenRcvBuf;
size_t iRcvBuf; /* current index into the rcvBuf (buf empty if iRcvBuf == lenRcvBuf) */
int sock; /* socket to this server (most important when we do multiple msgs per mail) */
} smtp;
} md; /* mode-specific data */
} instanceData;
BEGINcreateInstance
CODESTARTcreateInstance
ENDcreateInstance
BEGINisCompatibleWithFeature
CODESTARTisCompatibleWithFeature
if(eFeat == sFEATURERepeatedMsgReduction)
iRet = RS_RET_OK;
ENDisCompatibleWithFeature
BEGINfreeInstance
CODESTARTfreeInstance
if(pData->iMode == 0) {
if(pData->md.smtp.pszSrv != NULL)
free(pData->md.smtp.pszSrv);
if(pData->md.smtp.pszSrvPort != NULL)
free(pData->md.smtp.pszSrvPort);
if(pData->md.smtp.pszFrom != NULL)
free(pData->md.smtp.pszFrom);
if(pData->md.smtp.pszTo != NULL)
free(pData->md.smtp.pszTo);
if(pData->md.smtp.pszSubject != NULL)
free(pData->md.smtp.pszSubject);
}
ENDfreeInstance
BEGINdbgPrintInstInfo
CODESTARTdbgPrintInstInfo
printf("mail"); /* TODO: extend! */
ENDdbgPrintInstInfo
/* TCP support code, should probably be moved to net.c or some place else... -- rgerhards, 2008-04-04 */
/* "receive" a character from the remote server. A single character
* is returned. Returns RS_RET_NO_MORE_DATA if the server has closed
* the connection and RS_RET_IO_ERROR if something goes wrong. This
* is a blocking read.
* rgerhards, 2008-04-04
*/
static rsRetVal
getRcvChar(instanceData *pData, char *pC)
{
DEFiRet;
ssize_t lenBuf;
assert(pData != NULL);
if(pData->md.smtp.iRcvBuf == pData->md.smtp.lenRcvBuf) { /* buffer empty? */
/* yes, we need to read the next server response */
do {
lenBuf = recv(pData->md.smtp.sock, pData->md.smtp.RcvBuf, sizeof(pData->md.smtp.RcvBuf), 0);
if(lenBuf == 0) {
ABORT_FINALIZE(RS_RET_NO_MORE_DATA);
} else if(lenBuf < 0) {
if(errno != EAGAIN) {
ABORT_FINALIZE(RS_RET_IO_ERROR);
}
} else {
/* good read */
pData->md.smtp.iRcvBuf = 0;
pData->md.smtp.lenRcvBuf = lenBuf;
}
} while(lenBuf < 1);
}
/* when we reach this point, we have a non-empty buffer */
*pC = pData->md.smtp.RcvBuf[pData->md.smtp.iRcvBuf++];
finalize_it:
RETiRet;
}
#if 0
/* Initialize TCP socket (for sender), new socket is returned in
* pSock if all goes well.
*/
static rsRetVal
CreateSocket(struct addrinfo *addrDest, int *pSock)
{
DEFiRet;
int fd;
struct addrinfo *r;
char errStr[1024];
r = addrDest;
while(r != NULL) {
fd = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
if(fd != -1) {
if(connect(fd, r->ai_addr, r->ai_addrlen) != 0) {
dbgprintf("create tcp connection failed, reason %s", rs_strerror_r(errno, errStr, sizeof(errStr)));
} else {
*pSock = fd;
FINALIZE;
}
close(fd);
} else {
dbgprintf("couldn't create send socket, reason %s", rs_strerror_r(errno, errStr, sizeof(errStr)));
}
r = r->ai_next;
}
dbgprintf("no working socket could be obtained");
iRet = RS_RET_NO_SOCKET;
finalize_it:
RETiRet;
}
#endif
/* open a connection to the mail server
* rgerhards, 2008-04-04
*/
static rsRetVal
serverConnect(instanceData *pData)
{
struct addrinfo *res = NULL;
struct addrinfo hints;
char errStr[1024];
DEFiRet;
assert(pData != NULL);
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC; /* TODO: make configurable! */
hints.ai_socktype = SOCK_STREAM;
if(getaddrinfo((char*)pData->md.smtp.pszSrv, (char*)pData->md.smtp.pszSrvPort, &hints, &res) != 0) {
dbgprintf("error %d in getaddrinfo\n", errno);
ABORT_FINALIZE(RS_RET_IO_ERROR);
}
if((pData->md.smtp.sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol)) == -1) {
dbgprintf("couldn't create send socket, reason %s", rs_strerror_r(errno, errStr, sizeof(errStr)));
ABORT_FINALIZE(RS_RET_IO_ERROR);
}
if(connect(pData->md.smtp.sock, res->ai_addr, res->ai_addrlen) != 0) {
dbgprintf("create tcp connection failed, reason %s", rs_strerror_r(errno, errStr, sizeof(errStr)));
ABORT_FINALIZE(RS_RET_IO_ERROR);
}
finalize_it:
if(res != NULL)
freeaddrinfo(res);
if(iRet != RS_RET_OK) {
if(pData->md.smtp.sock != -1) {
close(pData->md.smtp.sock);
pData->md.smtp.sock = -1;
}
}
RETiRet;
}
/* send text to the server, blocking send */
static rsRetVal
Send(int sock, char *msg, size_t len)
{
DEFiRet;
size_t offsBuf = 0;
ssize_t lenSend;
assert(msg != NULL);
if(len == 0) /* it's valid, but does not make much sense ;) */
FINALIZE;
do {
lenSend = send(sock, msg + offsBuf, len - offsBuf, 0);
dbgprintf("TCP sent %ld bytes, requested %ld\n", (long) lenSend, (long) len);
if(lenSend == -1) {
if(errno != EAGAIN) {
dbgprintf("message not (tcp)send, errno %d", errno);
ABORT_FINALIZE(RS_RET_TCP_SEND_ERROR);
}
} else if(lenSend != (ssize_t) len) {
offsBuf += len; /* on to next round... */
} else {
FINALIZE;
}
} while(1);
finalize_it:
RETiRet;
}
/* send a message via SMTP
* TODO: care about the result codes, we can't do it that blindly ;)
* rgerhards, 2008-04-04
*/
static rsRetVal
sendSMTP(instanceData *pData, uchar *body)
{
DEFiRet;
assert(pData != NULL);
CHKiRet(serverConnect(pData));
CHKiRet(Send(pData->md.smtp.sock, "HELO\r\n", 6));
CHKiRet(Send(pData->md.smtp.sock, "MAIL FROM: \r\n", sizeof("MAIL FROM: \r\n") - 1));
CHKiRet(Send(pData->md.smtp.sock, "RCPT TO: \r\n", sizeof("RCPT TO: \r\n") - 1));
CHKiRet(Send(pData->md.smtp.sock, "DATA\r\n", sizeof("DATA\r\n") - 1));
CHKiRet(Send(pData->md.smtp.sock, body, strlen((char*) body)));
CHKiRet(Send(pData->md.smtp.sock, "\r\n.\r\n", sizeof("\r\n.\r\n") - 1));
CHKiRet(Send(pData->md.smtp.sock, "QUIT\r\n", sizeof("QUIT\r\n") - 1));
close(pData->md.smtp.sock);
pData->md.smtp.sock = -1;
finalize_it:
RETiRet;
}
/* connect to server
* rgerhards, 2008-04-04
*/
static rsRetVal doConnect(instanceData *pData)
{
DEFiRet;
iRet = serverConnect(pData);
if(iRet == RS_RET_IO_ERROR)
iRet = RS_RET_SUSPENDED;
RETiRet;
}
BEGINtryResume
CODESTARTtryResume
iRet = doConnect(pData);
ENDtryResume
BEGINdoAction
CODESTARTdoAction
dbgprintf(" Mail\n");
// if(!pData->bIsConnected) {
// CHKiRet(doConnect(pData));
// }
/* forward */
iRet = sendSMTP(pData, ppString[0]);
if(iRet != RS_RET_OK) {
/* error! */
dbgprintf("error sending mail, suspending\n");
iRet = RS_RET_SUSPENDED;
}
finalize_it:
ENDdoAction
BEGINparseSelectorAct
CODESTARTparseSelectorAct
CODE_STD_STRING_REQUESTparseSelectorAct(1)
if(!strncmp((char*) p, ":ommail:", sizeof(":ommail:") - 1)) {
p += sizeof(":ommail:") - 1; /* eat indicator sequence (-1 because of '\0'!) */
} else {
ABORT_FINALIZE(RS_RET_CONFLINE_UNPROCESSED);
}
/* ok, if we reach this point, we have something for us */
if((iRet = createInstance(&pData)) != RS_RET_OK)
FINALIZE;
//pData->md.smtp.pszSrv = "172.19.2.10";
pData->md.smtp.pszSrv = "172.19.0.6";
pData->md.smtp.pszSrvPort = "25";
pData->md.smtp.pszFrom = "rgerhards@adiscon.com";
pData->md.smtp.pszTo = "rgerhards@adiscon.com";
pData->md.smtp.pszSubject = "rsyslog test message";
/* process template */
CHKiRet(cflineParseTemplateName(&p, *ppOMSR, 0, OMSR_NO_RQD_TPL_OPTS, (uchar*) "RSYSLOG_TraditionalForwardFormat"));
/* TODO: do we need to call freeInstance if we failed - this is a general question for
* all output modules. I'll address it later as the interface evolves. rgerhards, 2007-07-25
*/
CODE_STD_FINALIZERparseSelectorAct
ENDparseSelectorAct
BEGINmodExit
CODESTARTmodExit
/* release what we no longer need */
objRelease(errmsg, CORE_COMPONENT);
ENDmodExit
BEGINqueryEtryPt
CODESTARTqueryEtryPt
CODEqueryEtryPt_STD_OMOD_QUERIES
ENDqueryEtryPt
BEGINmodInit()
CODESTARTmodInit
*ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */
CODEmodInit_QueryRegCFSLineHdlr
/* tell which objects we need */
CHKiRet(objUse(errmsg, CORE_COMPONENT));
ENDmodInit
/* vim:set ai:
*/