diff options
Diffstat (limited to 'plugins/ommail')
| -rw-r--r-- | plugins/ommail/Makefile.am | 6 | ||||
| -rw-r--r-- | plugins/ommail/Makefile.in | 796 | ||||
| -rw-r--r-- | plugins/ommail/ommail.c | 902 |
3 files changed, 1704 insertions, 0 deletions
diff --git a/plugins/ommail/Makefile.am b/plugins/ommail/Makefile.am new file mode 100644 index 0000000..97c9296 --- /dev/null +++ b/plugins/ommail/Makefile.am @@ -0,0 +1,6 @@ +pkglib_LTLIBRARIES = ommail.la + +ommail_la_SOURCES = ommail.c +ommail_la_CPPFLAGS = -I$(top_srcdir) $(PTHREADS_CFLAGS) $(RSRT_CFLAGS) +ommail_la_LDFLAGS = -module -avoid-version +ommail_la_LIBADD = diff --git a/plugins/ommail/Makefile.in b/plugins/ommail/Makefile.in new file mode 100644 index 0000000..a352aab --- /dev/null +++ b/plugins/ommail/Makefile.in @@ -0,0 +1,796 @@ +# Makefile.in generated by automake 1.16.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2018 Free Software Foundation, Inc. + +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + +VPATH = @srcdir@ +am__is_gnu_make = { \ + if test -z '$(MAKELEVEL)'; then \ + false; \ + elif test -n '$(MAKE_HOST)'; then \ + true; \ + elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \ + true; \ + else \ + false; \ + fi; \ +} +am__make_running_with_option = \ + case $${target_option-} in \ + ?) ;; \ + *) echo "am__make_running_with_option: internal error: invalid" \ + "target option '$${target_option-}' specified" >&2; \ + exit 1;; \ + esac; \ + has_opt=no; \ + sane_makeflags=$$MAKEFLAGS; \ + if $(am__is_gnu_make); then \ + sane_makeflags=$$MFLAGS; \ + else \ + case $$MAKEFLAGS in \ + *\\[\ \ ]*) \ + bs=\\; \ + sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \ + | sed "s/$$bs$$bs[$$bs $$bs ]*//g"`;; \ + esac; \ + fi; \ + skip_next=no; \ + strip_trailopt () \ + { \ + flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \ + }; \ + for flg in $$sane_makeflags; do \ + test $$skip_next = yes && { skip_next=no; continue; }; \ + case $$flg in \ + *=*|--*) continue;; \ + -*I) strip_trailopt 'I'; skip_next=yes;; \ + -*I?*) strip_trailopt 'I';; \ + -*O) strip_trailopt 'O'; skip_next=yes;; \ + -*O?*) strip_trailopt 'O';; \ + -*l) strip_trailopt 'l'; skip_next=yes;; \ + -*l?*) strip_trailopt 'l';; \ + -[dEDm]) skip_next=yes;; \ + -[JT]) skip_next=yes;; \ + esac; \ + case $$flg in \ + *$$target_option*) has_opt=yes; break;; \ + esac; \ + done; \ + test $$has_opt = yes +am__make_dryrun = (target_option=n; $(am__make_running_with_option)) +am__make_keepgoing = (target_option=k; $(am__make_running_with_option)) +pkgdatadir = $(datadir)/@PACKAGE@ +pkgincludedir = $(includedir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkglibexecdir = $(libexecdir)/@PACKAGE@ +am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd +install_sh_DATA = $(install_sh) -c -m 644 +install_sh_PROGRAM = $(install_sh) -c +install_sh_SCRIPT = $(install_sh) -c +INSTALL_HEADER = $(INSTALL_DATA) +transform = $(program_transform_name) +NORMAL_INSTALL = : +PRE_INSTALL = : +POST_INSTALL = : +NORMAL_UNINSTALL = : +PRE_UNINSTALL = : +POST_UNINSTALL = : +build_triplet = @build@ +host_triplet = @host@ +subdir = plugins/ommail +ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 +am__aclocal_m4_deps = $(top_srcdir)/m4/ac_check_define.m4 \ + $(top_srcdir)/m4/atomic_operations.m4 \ + $(top_srcdir)/m4/atomic_operations_64bit.m4 \ + $(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \ + $(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \ + $(top_srcdir)/m4/lt~obsolete.m4 $(top_srcdir)/configure.ac +am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \ + $(ACLOCAL_M4) +DIST_COMMON = $(srcdir)/Makefile.am $(am__DIST_COMMON) +mkinstalldirs = $(install_sh) -d +CONFIG_HEADER = $(top_builddir)/config.h +CONFIG_CLEAN_FILES = +CONFIG_CLEAN_VPATH_FILES = +am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`; +am__vpath_adj = case $$p in \ + $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \ + *) f=$$p;; \ + esac; +am__strip_dir = f=`echo $$p | sed -e 's|^.*/||'`; +am__install_max = 40 +am__nobase_strip_setup = \ + srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*|]/\\\\&/g'` +am__nobase_strip = \ + for p in $$list; do echo "$$p"; done | sed -e "s|$$srcdirstrip/||" +am__nobase_list = $(am__nobase_strip_setup); \ + for p in $$list; do echo "$$p $$p"; done | \ + sed "s| $$srcdirstrip/| |;"' / .*\//!s/ .*/ ./; s,\( .*\)/[^/]*$$,\1,' | \ + $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \ + if (++n[$$2] == $(am__install_max)) \ + { print $$2, files[$$2]; n[$$2] = 0; files[$$2] = "" } } \ + END { for (dir in files) print dir, files[dir] }' +am__base_list = \ + sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \ + sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g' +am__uninstall_files_from_dir = { \ + test -z "$$files" \ + || { test ! 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So far, we + * only support direct SMTP, that is talking to a SMTP server. In the long + * term, support for using sendmail should also be implemented. Please note + * that the SMTP protocol implementation is a very bare one. We support + * RFC821/822 messages, without any authentication and any other nice + * features (no MIME, no nothing). It is assumed that proper firewalling + * and/or STMP server configuration is used together with this module. + * + * NOTE: read comments in module-template.h to understand how this file + * works! + * + * File begun on 2008-04-04 by RGerhards + * + * Copyright 2008-2014 Adiscon GmbH. + * + * This file is part of rsyslog. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * -or- + * see COPYING.ASL20 in the source distribution + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include "config.h" +#include "rsyslog.h" +#include <stdio.h> +#include <stdarg.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <unistd.h> +#include <errno.h> +#include <netdb.h> +#include <time.h> +#include <sys/socket.h> +#include "conf.h" +#include "syslogd-types.h" +#include "srUtils.h" +#include "cfsysline.h" +#include "module-template.h" +#include "errmsg.h" +#include "datetime.h" +#include "glbl.h" +#include "parserif.h" + +MODULE_TYPE_OUTPUT +MODULE_TYPE_NOKEEP +MODULE_CNFNAME("ommail") + +/* internal structures + */ +DEF_OMOD_STATIC_DATA +DEFobjCurrIf(glbl) +DEFobjCurrIf(datetime) + +/* we add a little support for multiple recipients. We do this via a + * singly-linked list, enqueued from the top. -- rgerhards, 2008-08-04 + */ +typedef struct toRcpt_s toRcpt_t; +struct toRcpt_s { + uchar *pszTo; + toRcpt_t *pNext; +}; + +typedef struct _instanceData { + uchar *tplName; /* format template to use */ + uchar *constSubject; /* if non-NULL, constant string to be used as subject */ + int8_t iMode; /* 0 - smtp, 1 - sendmail */ + sbool bHaveSubject; /* is a subject configured? (if so, it is the second string provided by rsyslog core) */ + sbool bEnableBody; /* is a body configured? (if so, it is the second string provided by rsyslog core) */ + union { + struct { + uchar *pszSrv; + uchar *pszSrvPort; + uchar *pszFrom; + toRcpt_t *lstRcpt; + } smtp; + } md; /* mode-specific data */ +} instanceData; + +typedef struct wrkrInstanceData { + instanceData *pData; + union { + struct { + 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 */ +} wrkrInstanceData_t; + +typedef struct configSettings_s { + toRcpt_t *lstRcpt; + uchar *pszSrv; + uchar *pszSrvPort; + uchar *pszFrom; + uchar *pszSubject; + int bEnableBody; /* should a mail body be generated? (set to 0 eg for SMS gateways) */ +} configSettings_t; +static configSettings_t cs; + +/* tables for interfacing with the v6 config system */ +/* action (instance) parameters */ +static struct cnfparamdescr actpdescr[] = { + { "server", eCmdHdlrGetWord, CNFPARAM_REQUIRED }, + { "port", eCmdHdlrGetWord, CNFPARAM_REQUIRED }, + { "mailfrom", eCmdHdlrGetWord, CNFPARAM_REQUIRED }, + { "mailto", eCmdHdlrArray, CNFPARAM_REQUIRED }, + { "subject.template", eCmdHdlrGetWord, 0 }, + { "subject.text", eCmdHdlrString, 0 }, + { "body.enable", eCmdHdlrBinary, 0 }, + { "template", eCmdHdlrGetWord, 0 } +}; +static struct cnfparamblk actpblk = + { CNFPARAMBLK_VERSION, + sizeof(actpdescr)/sizeof(struct cnfparamdescr), + actpdescr + }; + + + +BEGINinitConfVars /* (re)set config variables to default values */ +CODESTARTinitConfVars + cs.lstRcpt = NULL; + cs.pszSrv = NULL; + cs.pszSrvPort = NULL; + cs.pszFrom = NULL; + cs.pszSubject = NULL; + cs.bEnableBody = 1; /* should a mail body be generated? (set to 0 eg for SMS gateways) */ +ENDinitConfVars + +/* forward definitions (as few as possible) */ +static rsRetVal Send(int sock, const char *msg, size_t len); +static rsRetVal readResponse(wrkrInstanceData_t *pWrkrData, int *piState, int iExpected); + + +/* helpers for handling the recipient lists */ + +/* destroy a complete recipient list */ +static void lstRcptDestruct(toRcpt_t *pRoot) +{ + toRcpt_t *pDel; + + while(pRoot != NULL) { + pDel = pRoot; + pRoot = pRoot->pNext; + /* ready to disalloc */ + free(pDel->pszTo); + free(pDel); + } +} + + +/* This function adds a recipient to the specified list. + * The recipient address storage is handed over -- the caller must NOT delete it. + */ +static rsRetVal +addRcpt(toRcpt_t **ppLstRcpt, uchar *newRcpt) +{ + DEFiRet; + toRcpt_t *pNew = NULL; + + CHKmalloc(pNew = calloc(1, sizeof(toRcpt_t))); + + pNew->pszTo = newRcpt; + pNew->pNext = *ppLstRcpt; + *ppLstRcpt = pNew; + + DBGPRINTF("ommail::addRcpt adds recipient %s\n", newRcpt); + +finalize_it: + if(iRet != RS_RET_OK) { + free(pNew); + free(newRcpt); /* in any case, this is no longer needed */ + } + + RETiRet; +} + +/* This function is called when a new recipient email address is to be + * added. rgerhards, 2008-08-04 + */ +static rsRetVal +legacyConfAddRcpt(void __attribute__((unused)) *pVal, uchar *pNewVal) +{ + return addRcpt(&cs.lstRcpt, pNewVal); +} + + +/* output the recipient list to the mail server + * iStatusToCheck < 0 means no checking should happen + */ +static rsRetVal +WriteRcpts(wrkrInstanceData_t *pWrkrData, uchar *pszOp, size_t lenOp, int iStatusToCheck) +{ + toRcpt_t *pRcpt; + int iState; + DEFiRet; + + assert(lenOp != 0); + + for(pRcpt = pWrkrData->pData->md.smtp.lstRcpt ; pRcpt != NULL ; pRcpt = pRcpt->pNext) { + DBGPRINTF("Sending '%s: <%s>'\n", pszOp, pRcpt->pszTo); + CHKiRet(Send(pWrkrData->md.smtp.sock, (char*)pszOp, lenOp)); + CHKiRet(Send(pWrkrData->md.smtp.sock, ":<", sizeof(":<") - 1)); + CHKiRet(Send(pWrkrData->md.smtp.sock, (char*)pRcpt->pszTo, strlen((char*)pRcpt->pszTo))); + CHKiRet(Send(pWrkrData->md.smtp.sock, ">\r\n", sizeof(">\r\n") - 1)); + if(iStatusToCheck >= 0) + CHKiRet(readResponse(pWrkrData, &iState, iStatusToCheck)); + } + +finalize_it: + RETiRet; +} + + +/* output the recipient list in rfc2822 format + */ +static rsRetVal +WriteTos(wrkrInstanceData_t *pWrkrData, uchar *pszOp, size_t lenOp) +{ + toRcpt_t *pRcpt; + int iTos; + DEFiRet; + + assert(lenOp != 0); + + CHKiRet(Send(pWrkrData->md.smtp.sock, (char*)pszOp, lenOp)); + CHKiRet(Send(pWrkrData->md.smtp.sock, ": ", sizeof(": ") - 1)); + + for(pRcpt = pWrkrData->pData->md.smtp.lstRcpt, iTos = 0; pRcpt != NULL ; pRcpt = pRcpt->pNext, iTos++) { + DBGPRINTF("Sending '%s: <%s>'\n", pszOp, pRcpt->pszTo); + if(iTos) + CHKiRet(Send(pWrkrData->md.smtp.sock, ", ", sizeof(", ") - 1)); + CHKiRet(Send(pWrkrData->md.smtp.sock, "<", sizeof("<") - 1)); + CHKiRet(Send(pWrkrData->md.smtp.sock, (char*)pRcpt->pszTo, strlen((char*)pRcpt->pszTo))); + CHKiRet(Send(pWrkrData->md.smtp.sock, ">", sizeof(">") - 1)); + } + + CHKiRet(Send(pWrkrData->md.smtp.sock, "\r\n", sizeof("\r\n") - 1)); + +finalize_it: + RETiRet; +} +/* end helpers for handling the recipient lists */ + +BEGINcreateInstance +CODESTARTcreateInstance + pData->constSubject = NULL; + pData->bEnableBody = 1; +ENDcreateInstance + + +BEGINcreateWrkrInstance +CODESTARTcreateWrkrInstance +ENDcreateWrkrInstance + + +BEGINisCompatibleWithFeature +CODESTARTisCompatibleWithFeature + if(eFeat == sFEATURERepeatedMsgReduction) + iRet = RS_RET_OK; +ENDisCompatibleWithFeature + + +BEGINfreeInstance +CODESTARTfreeInstance + free(pData->tplName); + if(pData->iMode == 0) { + free(pData->md.smtp.pszSrv); + free(pData->md.smtp.pszSrvPort); + free(pData->md.smtp.pszFrom); + lstRcptDestruct(pData->md.smtp.lstRcpt); + } +ENDfreeInstance + + +BEGINfreeWrkrInstance +CODESTARTfreeWrkrInstance +ENDfreeWrkrInstance + + +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(wrkrInstanceData_t *pWrkrData, char *pC) +{ + DEFiRet; + ssize_t lenBuf; + + if(pWrkrData->md.smtp.iRcvBuf == pWrkrData->md.smtp.lenRcvBuf) { /* buffer empty? */ + /* yes, we need to read the next server response */ + do { + lenBuf = recv(pWrkrData->md.smtp.sock, pWrkrData->md.smtp.RcvBuf, + sizeof(pWrkrData->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 */ + pWrkrData->md.smtp.iRcvBuf = 0; + pWrkrData->md.smtp.lenRcvBuf = lenBuf; + } + + } while(lenBuf < 1); + } + + /* when we reach this point, we have a non-empty buffer */ + *pC = pWrkrData->md.smtp.RcvBuf[pWrkrData->md.smtp.iRcvBuf++]; + +finalize_it: + RETiRet; +} + + +/* close the mail server connection + * rgerhards, 2008-04-08 + */ +static rsRetVal +serverDisconnect(wrkrInstanceData_t *pWrkrData) +{ + DEFiRet; + assert(pWrkrData != NULL); + + if(pWrkrData->md.smtp.sock != -1) { + close(pWrkrData->md.smtp.sock); + pWrkrData->md.smtp.sock = -1; + } + + RETiRet; +} + + +/* open a connection to the mail server + * rgerhards, 2008-04-04 + */ +static rsRetVal +serverConnect(wrkrInstanceData_t *pWrkrData) +{ + struct addrinfo *res = NULL; + struct addrinfo hints; + const char *smtpPort; + const char *smtpSrv; + char errStr[1024]; + instanceData *pData; + DEFiRet; + + pData = pWrkrData->pData; + + if(pData->md.smtp.pszSrv == NULL) + smtpSrv = "127.0.0.1"; + else + smtpSrv = (char*)pData->md.smtp.pszSrv; + + if(pData->md.smtp.pszSrvPort == NULL) + smtpPort = "25"; + else + smtpPort = (char*)pData->md.smtp.pszSrvPort; + + memset(&hints, 0, sizeof(hints)); + hints.ai_family = AF_UNSPEC; /* TODO: make configurable! */ + hints.ai_socktype = SOCK_STREAM; + if(getaddrinfo(smtpSrv, smtpPort, &hints, &res) != 0) { + DBGPRINTF("error %d in getaddrinfo\n", errno); + ABORT_FINALIZE(RS_RET_IO_ERROR); + } + + if((pWrkrData->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(pWrkrData->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(pWrkrData->md.smtp.sock != -1) { + close(pWrkrData->md.smtp.sock); + pWrkrData->md.smtp.sock = -1; + } + } + + RETiRet; +} + + +/* send text to the server, blocking send */ +static rsRetVal +Send(const int sock, const char *const __restrict__ msg, const 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); + if(lenSend == -1) { + if(errno != EAGAIN) { + DBGPRINTF("message not (smtp/tcp)send, errno %d", errno); + ABORT_FINALIZE(RS_RET_TCP_SEND_ERROR); + } + } else if(lenSend != (ssize_t) (len - offsBuf)) { + offsBuf += lenSend; /* on to next round... */ + } else { + FINALIZE; + } + } while(1); + +finalize_it: + RETiRet; +} + + +/* send body text to the server, blocking send + * The body is special in that we must escape a leading dot inside a line + */ +static rsRetVal +bodySend(wrkrInstanceData_t *pWrkrData, char *msg, size_t len) +{ + DEFiRet; + char szBuf[2048]; + size_t iSrc; + size_t iBuf = 0; + int bHadCR = 0; + int bInStartOfLine = 1; + + assert(pWrkrData != NULL); + assert(msg != NULL); + + for(iSrc = 0 ; iSrc < len ; ++iSrc) { + if(iBuf >= sizeof(szBuf) - 1) { /* one is reserved for our extra dot */ + CHKiRet(Send(pWrkrData->md.smtp.sock, szBuf, iBuf)); + iBuf = 0; + } + szBuf[iBuf++] = msg[iSrc]; + switch(msg[iSrc]) { + case '\r': + bHadCR = 1; + break; + case '\n': + if(bHadCR) + bInStartOfLine = 1; + bHadCR = 0; + break; + case '.': + if(bInStartOfLine) + szBuf[iBuf++] = '.'; /* space is always reserved for this! */ + /*FALLTHROUGH*/ + default: + bInStartOfLine = 0; + bHadCR = 0; + break; + } + } + + if(iBuf > 0) { /* incomplete buffer to send (the *usual* case)? */ + CHKiRet(Send(pWrkrData->md.smtp.sock, szBuf, iBuf)); + } + +finalize_it: + RETiRet; +} + + +/* read response line from server + */ +static rsRetVal +readResponseLn(wrkrInstanceData_t *pWrkrData, char *pLn, size_t lenLn, size_t *const __restrict__ respLen) +{ + DEFiRet; + size_t i = 0; + char c; + + assert(pWrkrData != NULL); + assert(pLn != NULL); + + do { + CHKiRet(getRcvChar(pWrkrData, &c)); + if(c == '\n') + break; + if(i < (lenLn - 1)) /* if line is too long, we simply discard the rest */ + pLn[i++] = c; + } while(1); + DBGPRINTF("smtp server response: %s\n", pLn); + /* do not remove, this is helpful in troubleshooting SMTP probs! */ + +finalize_it: + pLn[i] = '\0'; + *respLen = i; + RETiRet; +} + + +/* read numerical response code from server and compare it to requried response code. + * If they two don't match, return RS_RET_SMTP_ERROR. + * rgerhards, 2008-04-07 + */ +static rsRetVal +readResponse(wrkrInstanceData_t *pWrkrData, int *piState, int iExpected) +{ + DEFiRet; + int bCont; + char buf[128]; + size_t respLen; + + assert(pWrkrData != NULL); + assert(piState != NULL); + + bCont = 1; + do { + CHKiRet(readResponseLn(pWrkrData, buf, sizeof(buf), &respLen)); + if(respLen < 4) /* we treat too-short responses as error */ + ABORT_FINALIZE(RS_RET_SMTP_ERROR); + if(buf[3] != '-') { /* last or only response line? */ + bCont = 0; + *piState = buf[0] - '0'; + *piState = *piState * 10 + buf[1] - '0'; + *piState = *piState * 10 + buf[2] - '0'; + if(*piState != iExpected) + ABORT_FINALIZE(RS_RET_SMTP_ERROR); + } + } while(bCont); + +finalize_it: + RETiRet; +} + + +/* create a timestamp suitable for use with the Date: SMTP body header + * rgerhards, 2008-04-08 + */ +static void +mkSMTPTimestamp(uchar *pszBuf, size_t lenBuf) +{ + time_t tCurr; + struct tm tmCurr; + static const char szDay[][4] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"}; + static const char szMonth[][4] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", + "Oct", "Nov", "Dec"}; + + datetime.GetTime(&tCurr); + gmtime_r(&tCurr, &tmCurr); + snprintf((char*)pszBuf, lenBuf, "Date: %s, %2d %s %4d %02d:%02d:%02d +0000\r\n", szDay[tmCurr.tm_wday], + tmCurr.tm_mday, + szMonth[tmCurr.tm_mon], 1900 + tmCurr.tm_year, tmCurr.tm_hour, tmCurr.tm_min, tmCurr.tm_sec); +} + + +/* send a message via SMTP + * rgerhards, 2008-04-04 + */ +static rsRetVal +sendSMTP(wrkrInstanceData_t *pWrkrData, uchar *body, uchar *subject) +{ + DEFiRet; + int iState; /* SMTP state */ + instanceData *pData; + uchar szDateBuf[64]; + + pData = pWrkrData->pData; + + CHKiRet(serverConnect(pWrkrData)); + CHKiRet(readResponse(pWrkrData, &iState, 220)); + + CHKiRet(Send(pWrkrData->md.smtp.sock, "HELO ", 5)); + CHKiRet(Send(pWrkrData->md.smtp.sock, (char*)glbl.GetLocalHostName(), + strlen((char*)glbl.GetLocalHostName()))); + CHKiRet(Send(pWrkrData->md.smtp.sock, "\r\n", sizeof("\r\n") - 1)); + CHKiRet(readResponse(pWrkrData, &iState, 250)); + + CHKiRet(Send(pWrkrData->md.smtp.sock, "MAIL FROM:<", sizeof("MAIL FROM:<") - 1)); + CHKiRet(Send(pWrkrData->md.smtp.sock, (char*)pData->md.smtp.pszFrom, strlen((char*)pData->md.smtp.pszFrom))); + CHKiRet(Send(pWrkrData->md.smtp.sock, ">\r\n", sizeof(">\r\n") - 1)); + CHKiRet(readResponse(pWrkrData, &iState, 250)); + + CHKiRet(WriteRcpts(pWrkrData, (uchar*)"RCPT TO", sizeof("RCPT TO") - 1, 250)); + + CHKiRet(Send(pWrkrData->md.smtp.sock, "DATA\r\n", sizeof("DATA\r\n") - 1)); + CHKiRet(readResponse(pWrkrData, &iState, 354)); + + /* now come the data part */ + /* header */ + mkSMTPTimestamp(szDateBuf, sizeof(szDateBuf)); + CHKiRet(Send(pWrkrData->md.smtp.sock, (char*)szDateBuf, strlen((char*)szDateBuf))); + + CHKiRet(Send(pWrkrData->md.smtp.sock, "From: <", sizeof("From: <") - 1)); + CHKiRet(Send(pWrkrData->md.smtp.sock, (char*)pData->md.smtp.pszFrom, strlen((char*)pData->md.smtp.pszFrom))); + CHKiRet(Send(pWrkrData->md.smtp.sock, ">\r\n", sizeof(">\r\n") - 1)); + + CHKiRet(WriteTos(pWrkrData, (uchar*)"To", sizeof("To") - 1)); + + CHKiRet(Send(pWrkrData->md.smtp.sock, "Subject: ", sizeof("Subject: ") - 1)); + CHKiRet(Send(pWrkrData->md.smtp.sock, (char*)subject, strlen((char*)subject))); + CHKiRet(Send(pWrkrData->md.smtp.sock, "\r\n", sizeof("\r\n") - 1)); + + CHKiRet(Send(pWrkrData->md.smtp.sock, "X-Mailer: rsyslog-ommail\r\n", + sizeof("x-mailer: rsyslog-ommail\r\n") - 1)); + + CHKiRet(Send(pWrkrData->md.smtp.sock, "\r\n", sizeof("\r\n") - 1)); /* indicate end of header */ + + /* body */ + if(pData->bEnableBody) + CHKiRet(bodySend(pWrkrData, (char*)body, strlen((char*) body))); + + /* end of data, back to envelope transaction */ + CHKiRet(Send(pWrkrData->md.smtp.sock, "\r\n.\r\n", sizeof("\r\n.\r\n") - 1)); + CHKiRet(readResponse(pWrkrData, &iState, 250)); + + CHKiRet(Send(pWrkrData->md.smtp.sock, "QUIT\r\n", sizeof("QUIT\r\n") - 1)); + CHKiRet(readResponse(pWrkrData, &iState, 221)); + + /* we are finished, a new connection is created for each request, so let's close it now */ + CHKiRet(serverDisconnect(pWrkrData)); + +finalize_it: + RETiRet; +} + + +/* in tryResume we check if we can connect to the server in question. If that is OK, + * we close the connection without doing any actual SMTP transaction. It will be + * reopened during the actual send process. This may not be the best way to do it if + * there is a problem inside the SMTP transaction. However, we can't find that out without + * actually initiating something, and that would be bad. The logic here helps us + * correctly recover from an unreachable/down mail server, which is probably the majority + * of problem cases. For SMTP transaction problems, we will do lots of retries, but if it + * is a temporary problem, it will be fixed anyhow. So I consider this implementation to + * be clean enough, especially as I think other approaches have other weaknesses. + * rgerhards, 2008-04-08 + */ +BEGINtryResume +CODESTARTtryResume + CHKiRet(serverConnect(pWrkrData)); + CHKiRet(serverDisconnect(pWrkrData)); /* if we fail, we will never reach this line */ +finalize_it: + if(iRet == RS_RET_IO_ERROR) + iRet = RS_RET_SUSPENDED; +ENDtryResume + + +BEGINdoAction + uchar *subject; + const instanceData *const __restrict__ pData = pWrkrData->pData; +CODESTARTdoAction + DBGPRINTF("ommail doAction()\n"); + + if(pData->constSubject != NULL) + subject = pData->constSubject; + else if(pData->bHaveSubject) + subject = ppString[1]; + else + subject = (uchar*)"message from rsyslog"; + + iRet = sendSMTP(pWrkrData, ppString[0], subject); + if(iRet != RS_RET_OK) { + DBGPRINTF("error sending mail, suspending\n"); + iRet = RS_RET_SUSPENDED; + } +ENDdoAction + + + +static inline void +setInstParamDefaults(instanceData *pData) +{ + pData->tplName = NULL; + pData->constSubject = NULL; +} + + +BEGINnewActInst + struct cnfparamvals *pvals; + uchar *tplSubject = NULL; + int i, j; +CODESTARTnewActInst + if((pvals = nvlstGetParams(lst, &actpblk, NULL)) == NULL) { + ABORT_FINALIZE(RS_RET_MISSING_CNFPARAMS); + } + + CHKiRet(createInstance(&pData)); + setInstParamDefaults(pData); + + for(i = 0 ; i < actpblk.nParams ; ++i) { + if(!pvals[i].bUsed) + continue; + if(!strcmp(actpblk.descr[i].name, "server")) { + pData->md.smtp.pszSrv = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if(!strcmp(actpblk.descr[i].name, "port")) { + pData->md.smtp.pszSrvPort = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if(!strcmp(actpblk.descr[i].name, "mailfrom")) { + pData->md.smtp.pszFrom = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if(!strcmp(actpblk.descr[i].name, "mailto")) { + for(j = 0 ; j < pvals[i].val.d.ar->nmemb ; ++j) { + addRcpt(&(pData->md.smtp.lstRcpt), + (uchar*)es_str2cstr(pvals[i].val.d.ar->arr[j], NULL)); + } + } else if(!strcmp(actpblk.descr[i].name, "subject.template")) { + if(pData->constSubject != NULL) { + parser_errmsg("ommail: only one of subject.template, subject.text " + "can be set"); + ABORT_FINALIZE(RS_RET_DUP_PARAM); + } + tplSubject = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if(!strcmp(actpblk.descr[i].name, "subject.text")) { + if(tplSubject != NULL) { + parser_errmsg("ommail: only one of subject.template, subject.text " + "can be set"); + ABORT_FINALIZE(RS_RET_DUP_PARAM); + } + pData->constSubject = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if(!strcmp(actpblk.descr[i].name, "body.enable")) { + pData->bEnableBody = (int) pvals[i].val.d.n; + } else if(!strcmp(actpblk.descr[i].name, "template")) { + pData->tplName = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else { + DBGPRINTF("ommail: program error, non-handled " + "param '%s'\n", actpblk.descr[i].name); + } + } + + if(tplSubject == NULL) { + /* if no subject is configured, we need just one template string */ + CODE_STD_STRING_REQUESTparseSelectorAct(1) + } else { + CODE_STD_STRING_REQUESTparseSelectorAct(2) + pData->bHaveSubject = 1; + /* NOTE: tplSubject memory is *handed over* down here below - do NOT free() */ + CHKiRet(OMSRsetEntry(*ppOMSR, 1, tplSubject, OMSR_NO_RQD_TPL_OPTS)); + } + + if(pData->tplName == NULL) { + CHKiRet(OMSRsetEntry(*ppOMSR, 0, (uchar*) strdup("RSYSLOG_FileFormat"), + OMSR_NO_RQD_TPL_OPTS)); + } else { + CHKiRet(OMSRsetEntry(*ppOMSR, 0, + (uchar*) strdup((char*) pData->tplName), + OMSR_NO_RQD_TPL_OPTS)); + } +CODE_STD_FINALIZERnewActInst + cnfparamvalsDestruct(pvals, &actpblk); +ENDnewActInst + + +BEGINparseSelectorAct +CODESTARTparseSelectorAct + 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; + + /* TODO: check strdup() result */ + + if(cs.pszFrom == NULL) { + LogError(0, RS_RET_MAIL_NO_FROM, "no sender address given - specify $ActionMailFrom"); + ABORT_FINALIZE(RS_RET_MAIL_NO_FROM); + } + if(cs.lstRcpt == NULL) { + LogError(0, RS_RET_MAIL_NO_TO, "no recipient address given - specify $ActionMailTo"); + ABORT_FINALIZE(RS_RET_MAIL_NO_TO); + } + + pData->md.smtp.pszFrom = (uchar*) strdup((char*)cs.pszFrom); + pData->md.smtp.lstRcpt = cs.lstRcpt; /* we "hand over" this memory */ + cs.lstRcpt = NULL; /* note: this is different from pre-3.21.2 versions! */ + + if(cs.pszSubject == NULL) { + /* if no subject is configured, we need just one template string */ + CODE_STD_STRING_REQUESTparseSelectorAct(1) + } else { + CODE_STD_STRING_REQUESTparseSelectorAct(2) + pData->bHaveSubject = 1; + CHKiRet(OMSRsetEntry(*ppOMSR, 1, (uchar*)strdup((char*) cs.pszSubject), OMSR_NO_RQD_TPL_OPTS)); + } + if(cs.pszSrv != NULL) + pData->md.smtp.pszSrv = (uchar*) strdup((char*)cs.pszSrv); + if(cs.pszSrvPort != NULL) + pData->md.smtp.pszSrvPort = (uchar*) strdup((char*)cs.pszSrvPort); + pData->bEnableBody = cs.bEnableBody; + + /* process template */ + iRet = cflineParseTemplateName(&p, *ppOMSR, 0, OMSR_NO_RQD_TPL_OPTS, (uchar*) "RSYSLOG_FileFormat"); +CODE_STD_FINALIZERparseSelectorAct +ENDparseSelectorAct + + +/* Free string config variables and reset them to NULL (not necessarily the default!) */ +static rsRetVal freeConfigVariables(void) +{ + DEFiRet; + + free(cs.pszSrv); + cs.pszSrv = NULL; + free(cs.pszSrvPort); + cs.pszSrvPort = NULL; + free(cs.pszFrom); + cs.pszFrom = NULL; + lstRcptDestruct(cs.lstRcpt); + cs.lstRcpt = NULL; + + RETiRet; +} + + +BEGINmodExit +CODESTARTmodExit + /* cleanup our allocations */ + freeConfigVariables(); + + /* release what we no longer need */ + objRelease(datetime, CORE_COMPONENT); + objRelease(glbl, CORE_COMPONENT); +ENDmodExit + + +BEGINqueryEtryPt +CODESTARTqueryEtryPt +CODEqueryEtryPt_STD_OMOD_QUERIES +CODEqueryEtryPt_STD_CONF2_OMOD_QUERIES +CODEqueryEtryPt_STD_OMOD8_QUERIES +CODEqueryEtryPt_STD_CONF2_CNFNAME_QUERIES +ENDqueryEtryPt + + +/* Reset config variables for this module to default values. + */ +static rsRetVal resetConfigVariables(uchar __attribute__((unused)) *pp, void __attribute__((unused)) *pVal) +{ + DEFiRet; + cs.bEnableBody = 1; + iRet = freeConfigVariables(); + RETiRet; +} + + +BEGINmodInit() +CODESTARTmodInit +INITLegCnfVars + *ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */ +CODEmodInit_QueryRegCFSLineHdlr + /* tell which objects we need */ + CHKiRet(objUse(glbl, CORE_COMPONENT)); + CHKiRet(objUse(datetime, CORE_COMPONENT)); + + DBGPRINTF("ommail version %s initializing\n", VERSION); + + CHKiRet(omsdRegCFSLineHdlr( (uchar *)"actionmailsmtpserver", 0, eCmdHdlrGetWord, NULL, &cs.pszSrv, + STD_LOADABLE_MODULE_ID)); + CHKiRet(omsdRegCFSLineHdlr( (uchar *)"actionmailsmtpport", 0, eCmdHdlrGetWord, NULL, &cs.pszSrvPort, + STD_LOADABLE_MODULE_ID)); + CHKiRet(omsdRegCFSLineHdlr( (uchar *)"actionmailfrom", 0, eCmdHdlrGetWord, NULL, &cs.pszFrom, + STD_LOADABLE_MODULE_ID)); + CHKiRet(omsdRegCFSLineHdlr( (uchar *)"actionmailto", 0, eCmdHdlrGetWord, legacyConfAddRcpt, NULL, + STD_LOADABLE_MODULE_ID)); + CHKiRet(omsdRegCFSLineHdlr( (uchar *)"actionmailsubject", 0, eCmdHdlrGetWord, NULL, &cs.pszSubject, + STD_LOADABLE_MODULE_ID)); + CHKiRet(omsdRegCFSLineHdlr( (uchar *)"actionmailenablebody", 0, eCmdHdlrBinary, NULL, &cs.bEnableBody, + STD_LOADABLE_MODULE_ID)); + CHKiRet(omsdRegCFSLineHdlr( (uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler, + resetConfigVariables, NULL, STD_LOADABLE_MODULE_ID)); +ENDmodInit |