summaryrefslogtreecommitdiffstats
path: root/plugins/imtcp/imtcp.c
diff options
context:
space:
mode:
Diffstat (limited to 'plugins/imtcp/imtcp.c')
-rw-r--r--plugins/imtcp/imtcp.c309
1 files changed, 18 insertions, 291 deletions
diff --git a/plugins/imtcp/imtcp.c b/plugins/imtcp/imtcp.c
index 84bb61a2..a1fabea7 100644
--- a/plugins/imtcp/imtcp.c
+++ b/plugins/imtcp/imtcp.c
@@ -47,17 +47,11 @@
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
-#ifdef USE_GSSAPI
-#include <gssapi/gssapi.h>
-#endif
#include "rsyslog.h"
#include "syslogd.h"
#include "cfsysline.h"
#include "module-template.h"
#include "net.h"
-#ifdef USE_GSSAPI
-#include "gss-misc.h"
-#endif
#include "srUtils.h"
MODULE_TYPE_INPUT
@@ -102,10 +96,6 @@ static int bEnableTCP = 0; /* read-only after startup */
static int *sockTCPLstn = NULL; /* read-only after startup, modified by restart */
static struct TCPSession *pTCPSessions;
/* The thread-safeness of the sesion table is doubtful */
-#ifdef USE_GSSAPI
-static gss_cred_id_t gss_server_creds = GSS_C_NO_CREDENTIAL;
-static char *gss_listen_service_name = NULL;
-#endif
/* config settings */
@@ -763,6 +753,7 @@ int TCPSessDataRcvd(int iTCPSess, char *pData, int iLen)
}
+#ifndef USE_GSSAPI
static rsRetVal addTCPListener(void __attribute__((unused)) *pVal, uchar *pNewVal)
{
if (!bEnableTCP)
@@ -771,283 +762,7 @@ static rsRetVal addTCPListener(void __attribute__((unused)) *pVal, uchar *pNewVa
return RS_RET_OK;
}
-
-
-#ifdef USE_GSSAPI
-static rsRetVal addGSSListener(void __attribute__((unused)) *pVal, uchar *pNewVal)
-{
- if (!bEnableTCP)
- configureTCPListen((char *) pNewVal);
- bEnableTCP |= ALLOWEDMETHOD_GSS;
-
- return RS_RET_OK;
-}
-
-
-/* returns 0 if all went OK, -1 if it failed */
-int TCPSessGSSInit(void)
-{
- gss_buffer_desc name_buf;
- gss_name_t server_name;
- OM_uint32 maj_stat, min_stat;
-
- if (gss_server_creds != GSS_C_NO_CREDENTIAL)
- return 0;
-
- name_buf.value = (gss_listen_service_name == NULL) ? "host" : gss_listen_service_name;
- name_buf.length = strlen(name_buf.value) + 1;
- maj_stat = gss_import_name(&min_stat, &name_buf, GSS_C_NT_HOSTBASED_SERVICE, &server_name);
- if (maj_stat != GSS_S_COMPLETE) {
- display_status("importing name", maj_stat, min_stat);
- return -1;
- }
-
- maj_stat = gss_acquire_cred(&min_stat, server_name, 0,
- GSS_C_NULL_OID_SET, GSS_C_ACCEPT,
- &gss_server_creds, NULL, NULL);
- if (maj_stat != GSS_S_COMPLETE) {
- display_status("acquiring credentials", maj_stat, min_stat);
- return -1;
- }
-
- gss_release_name(&min_stat, &server_name);
- dbgprintf("GSS-API initialized\n");
- return 0;
-}
-
-
-/* returns 0 if all went OK, -1 if it failed */
-int TCPSessGSSAccept(int fd)
-{
- gss_buffer_desc send_tok, recv_tok;
- gss_name_t client;
- OM_uint32 maj_stat, min_stat, acc_sec_min_stat;
- int iSess;
- gss_ctx_id_t *context;
- OM_uint32 *sess_flags;
- int fdSess;
- char allowedMethods;
-
- if ((iSess = TCPSessAccept(fd)) == -1)
- return -1;
-
- allowedMethods = pTCPSessions[iSess].allowedMethods;
- if (allowedMethods & ALLOWEDMETHOD_GSS) {
- /* Buffer to store raw message in case that
- * gss authentication fails halfway through.
- */
- char buf[MAXLINE];
- int ret = 0;
-
- dbgprintf("GSS-API Trying to accept TCP session %d\n", iSess);
-
- fdSess = pTCPSessions[iSess].sock;
- if (allowedMethods & ALLOWEDMETHOD_TCP) {
- int len;
- fd_set fds;
- struct timeval tv;
-
- do {
- FD_ZERO(&fds);
- FD_SET(fdSess, &fds);
- tv.tv_sec = 1;
- tv.tv_usec = 0;
- ret = select(fdSess + 1, &fds, NULL, NULL, &tv);
- } while (ret < 0 && errno == EINTR);
- if (ret < 0) {
- logerrorInt("TCP session %d will be closed, error ignored\n", iSess);
- TCPSessClose(iSess);
- return -1;
- } else if (ret == 0) {
- dbgprintf("GSS-API Reverting to plain TCP\n");
- pTCPSessions[iSess].allowedMethods = ALLOWEDMETHOD_TCP;
- return 0;
- }
-
- do {
- ret = recv(fdSess, buf, sizeof (buf), MSG_PEEK);
- } while (ret < 0 && errno == EINTR);
- if (ret <= 0) {
- if (ret == 0)
- dbgprintf("GSS-API Connection closed by peer\n");
- else
- logerrorInt("TCP session %d will be closed, error ignored\n", iSess);
- TCPSessClose(iSess);
- return -1;
- }
-
- if (ret < 4) {
- dbgprintf("GSS-API Reverting to plain TCP\n");
- pTCPSessions[iSess].allowedMethods = ALLOWEDMETHOD_TCP;
- return 0;
- } else if (ret == 4) {
- /* The client might has been interupted after sending
- * the data length (4B), give him another chance.
- */
- sleep(1);
- do {
- ret = recv(fdSess, buf, sizeof (buf), MSG_PEEK);
- } while (ret < 0 && errno == EINTR);
- if (ret <= 0) {
- if (ret == 0)
- dbgprintf("GSS-API Connection closed by peer\n");
- else
- logerrorInt("TCP session %d will be closed, error ignored\n", iSess);
- TCPSessClose(iSess);
- return -1;
- }
- }
-
- len = ntohl((buf[0] << 24)
- | (buf[1] << 16)
- | (buf[2] << 8)
- | buf[3]);
- if ((ret - 4) < len || len == 0) {
- dbgprintf("GSS-API Reverting to plain TCP\n");
- pTCPSessions[iSess].allowedMethods = ALLOWEDMETHOD_TCP;
- return 0;
- }
- }
-
- context = &pTCPSessions[iSess].gss_context;
- *context = GSS_C_NO_CONTEXT;
- sess_flags = &pTCPSessions[iSess].gss_flags;
- do {
- if (recv_token(fdSess, &recv_tok) <= 0) {
- logerrorInt("TCP session %d will be closed, error ignored\n", iSess);
- TCPSessClose(iSess);
- return -1;
- }
- maj_stat = gss_accept_sec_context(&acc_sec_min_stat, context, gss_server_creds,
- &recv_tok, GSS_C_NO_CHANNEL_BINDINGS, &client,
- NULL, &send_tok, sess_flags, NULL, NULL);
- if (recv_tok.value) {
- free(recv_tok.value);
- recv_tok.value = NULL;
- }
- if (maj_stat != GSS_S_COMPLETE
- && maj_stat != GSS_S_CONTINUE_NEEDED) {
- gss_release_buffer(&min_stat, &send_tok);
- if (*context != GSS_C_NO_CONTEXT)
- gss_delete_sec_context(&min_stat, context, GSS_C_NO_BUFFER);
- if ((allowedMethods & ALLOWEDMETHOD_TCP) &&
- (GSS_ROUTINE_ERROR(maj_stat) == GSS_S_DEFECTIVE_TOKEN)) {
- dbgprintf("GSS-API Reverting to plain TCP\n");
- dbgprintf("tcp session socket with new data: #%d\n", fdSess);
- if(TCPSessDataRcvd(iSess, buf, ret) == 0) {
- logerrorInt("Tearing down TCP Session %d - see "
- "previous messages for reason(s)\n",
- iSess);
- TCPSessClose(iSess);
- return -1;
- }
- pTCPSessions[iSess].allowedMethods = ALLOWEDMETHOD_TCP;
- return 0;
- }
- display_status("accepting context", maj_stat,
- acc_sec_min_stat);
- TCPSessClose(iSess);
- return -1;
- }
- if (send_tok.length != 0) {
- if (send_token(fdSess, &send_tok) < 0) {
- gss_release_buffer(&min_stat, &send_tok);
- logerrorInt("TCP session %d will be closed, error ignored\n", iSess);
- if (*context != GSS_C_NO_CONTEXT)
- gss_delete_sec_context(&min_stat, context, GSS_C_NO_BUFFER);
- TCPSessClose(iSess);
- return -1;
- }
- gss_release_buffer(&min_stat, &send_tok);
- }
- } while (maj_stat == GSS_S_CONTINUE_NEEDED);
-
- maj_stat = gss_display_name(&min_stat, client, &recv_tok, NULL);
- if (maj_stat != GSS_S_COMPLETE)
- display_status("displaying name", maj_stat, min_stat);
- else
- dbgprintf("GSS-API Accepted connection from: %s\n", (char*) recv_tok.value);
- gss_release_name(&min_stat, &client);
- gss_release_buffer(&min_stat, &recv_tok);
-
- dbgprintf("GSS-API Provided context flags:\n");
- display_ctx_flags(*sess_flags);
- pTCPSessions[iSess].allowedMethods = ALLOWEDMETHOD_GSS;
- }
-
- return 0;
-}
-
-
-/* returns: ? */
-int TCPSessGSSRecv(int iSess, void *buf, size_t buf_len)
-{
- gss_buffer_desc xmit_buf, msg_buf;
- gss_ctx_id_t *context;
- OM_uint32 maj_stat, min_stat;
- int fdSess;
- int conf_state;
- int state, len;
-
- fdSess = pTCPSessions[iSess].sock;
- if ((state = recv_token(fdSess, &xmit_buf)) <= 0)
- return state;
-
- context = &pTCPSessions[iSess].gss_context;
- maj_stat = gss_unwrap(&min_stat, *context, &xmit_buf, &msg_buf,
- &conf_state, (gss_qop_t *) NULL);
- if (maj_stat != GSS_S_COMPLETE) {
- display_status("unsealing message", maj_stat, min_stat);
- if (xmit_buf.value) {
- free(xmit_buf.value);
- xmit_buf.value = 0;
- }
- return (-1);
- }
- if (xmit_buf.value) {
- free(xmit_buf.value);
- xmit_buf.value = 0;
- }
-
- len = msg_buf.length < buf_len ? msg_buf.length : buf_len;
- memcpy(buf, msg_buf.value, len);
- gss_release_buffer(&min_stat, &msg_buf);
-
- return len;
-}
-
-
-void TCPSessGSSClose(int iSess) {
- OM_uint32 maj_stat, min_stat;
- gss_ctx_id_t *context;
-
- if(iSess < 0 || iSess > iTCPSessMax) {
- errno = 0;
- logerror("internal error, trying to close an invalid TCP session!");
- return;
- }
-
- context = &pTCPSessions[iSess].gss_context;
- maj_stat = gss_delete_sec_context(&min_stat, context, GSS_C_NO_BUFFER);
- if (maj_stat != GSS_S_COMPLETE)
- display_status("deleting context", maj_stat, min_stat);
- *context = GSS_C_NO_CONTEXT;
- pTCPSessions[iSess].gss_flags = 0;
- pTCPSessions[iSess].allowedMethods = 0;
-
- TCPSessClose(iSess);
-}
-
-
-void TCPSessGSSDeinit(void) {
- OM_uint32 maj_stat, min_stat;
-
- maj_stat = gss_release_cred(&min_stat, &gss_server_creds);
- if (maj_stat != GSS_S_COMPLETE)
- display_status("releasing credentials", maj_stat, min_stat);
-}
-#endif /* #ifdef USE_GSSAPI */
-
+#endif
/* This function is called to gather input.
*/
@@ -1194,7 +909,15 @@ ENDrunInput
/* initialize and return if will run or not */
BEGINwillRun
CODESTARTwillRun
+#ifdef USE_GSSAPI
+ /* first check if we must support plain TCP, too. If so, set mode
+ * accordingly. -- rgerhards, 2008-02-26
+ */
+ if(bPermitPlainTcp)
+ bEnableTCP |= ALLOWEDMETHOD_TCP;
+
/* first apply some config settings */
+#endif
dbgprintf("imtcp: bEnableTCP %d\n", bEnableTCP);
PrintAllowedSenders(2); /* TCP */
#ifdef USE_GSSAPI
@@ -1270,6 +993,7 @@ static rsRetVal resetConfigVariables(uchar __attribute__((unused)) *pp, void __a
free(gss_listen_service_name);
gss_listen_service_name = NULL;
}
+ bPermitPlainTcp = 0;
#endif
return RS_RET_OK;
}
@@ -1280,15 +1004,18 @@ CODESTARTmodInit
*ipIFVersProvided = 1; /* so far, we only support the initial definition */
CODEmodInit_QueryRegCFSLineHdlr
/* register config file handlers */
- CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputtcpserverrun", 0, eCmdHdlrGetWord,
- addTCPListener, NULL, STD_LOADABLE_MODULE_ID));
- CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputtcpmaxsessions", 0, eCmdHdlrInt,
- NULL, &iTCPSessMax, STD_LOADABLE_MODULE_ID));
#if defined(USE_GSSAPI)
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"permitplaintcp", 0, eCmdHdlrBinary,
+ NULL, bPermitPlainTcp, STD_LOADABLE_MODULE_ID));
CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgssserverrun", 0, eCmdHdlrGetWord,
addGSSListener, NULL, STD_LOADABLE_MODULE_ID));
CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgssserverservicename", 0, eCmdHdlrGetWord,
NULL, &gss_listen_service_name, STD_LOADABLE_MODULE_ID));
+#else
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputtcpserverrun", 0, eCmdHdlrGetWord,
+ addTCPListener, NULL, STD_LOADABLE_MODULE_ID));
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputtcpmaxsessions", 0, eCmdHdlrInt,
+ NULL, &iTCPSessMax, STD_LOADABLE_MODULE_ID));
#endif
CHKiRet(omsdRegCFSLineHdlr((uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler,
resetConfigVariables, NULL, STD_LOADABLE_MODULE_ID));