diff options
Diffstat (limited to 'plugins/omudpspoof/omudpspoof.c')
| -rw-r--r-- | plugins/omudpspoof/omudpspoof.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/plugins/omudpspoof/omudpspoof.c b/plugins/omudpspoof/omudpspoof.c index 48d7a68e..11be59d6 100644 --- a/plugins/omudpspoof/omudpspoof.c +++ b/plugins/omudpspoof/omudpspoof.c @@ -118,6 +118,7 @@ static int iSourcePortEnd = DFLT_SOURCE_PORT_END; /* add some variables needed for libnet */ libnet_t *libnet_handle; char errbuf[LIBNET_ERRBUF_SIZE]; +pthread_mutex_t mutLibnet; /* forward definitions */ static rsRetVal doTryResume(instanceData *pData); @@ -180,6 +181,8 @@ ENDdbgPrintInstInfo /* Send a message via UDP + * Note: libnet is not thread-safe, so we need to ensure that only one + * instance ever is calling libnet code. * rgehards, 2007-12-20 */ static inline rsRetVal @@ -193,6 +196,7 @@ UDPSend(instanceData *pData, uchar *pszSourcename, char *msg, size_t len) struct sockaddr_in *tempaddr,source_ip; libnet_ptag_t ip, ipo; libnet_ptag_t udp; + sbool bNeedUnlock = 0; DEFiRet; if(pData->pSockArray == NULL) { @@ -207,6 +211,8 @@ UDPSend(instanceData *pData, uchar *pszSourcename, char *msg, size_t len) inet_pton(AF_INET, (char*)pszSourcename, &(source_ip.sin_addr)); bSendSuccess = FALSE; + d_pthread_mutex_lock(&mutLibnet); + bNeedUnlock = 1; for (r = pData->f_addr; r; r = r->ai_next) { tempaddr = (struct sockaddr_in *)r->ai_addr; libnet_clear_packet(libnet_handle); @@ -267,6 +273,9 @@ UDPSend(instanceData *pData, uchar *pszSourcename, char *msg, size_t len) } finalize_it: + if(bNeedUnlock) { + d_pthread_mutex_unlock(&mutLibnet); + } RETiRet; } @@ -440,6 +449,7 @@ BEGINmodExit CODESTARTmodExit /* destroy the libnet state needed for forged UDP sources */ libnet_destroy(libnet_handle); + pthread_mutex_destroy(&mutLibnet); /* release what we no longer need */ objRelease(errmsg, CORE_COMPONENT); objRelease(glbl, CORE_COMPONENT); @@ -488,6 +498,7 @@ CODEmodInit_QueryRegCFSLineHdlr errmsg.LogError(0, NO_ERRCODE, "Error initializing libnet, can not continue "); ABORT_FINALIZE(RS_RET_ERR_LIBNET_INIT); } + pthread_mutex_init(&mutLibnet, NULL); CHKiRet(regCfSysLineHdlr((uchar *)"actionomudpspoofdefaulttemplate", 0, eCmdHdlrGetWord, NULL, &pszTplName, NULL)); CHKiRet(regCfSysLineHdlr((uchar *)"actionomudpspoofsourcenametemplate", 0, eCmdHdlrGetWord, NULL, &pszSourceNameTemplate, NULL)); |