src/tcp_act.c - haproxy - Gitiles

 /*
  * AF_INET/AF_INET6 SOCK_STREAM protocol layer (tcp)
  *
  * Copyright 2000-2013 Willy Tarreau <w@1wt.eu>
  *
  * This program 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
  * 2 of the License, or (at your option) any later version.
  *
  */

 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>

 #include <sys/param.h>
 #include <sys/socket.h>
 #include <sys/types.h>

 #include <netinet/tcp.h>
 #include <netinet/in.h>

 #include <haproxy/action-t.h>
 #include <haproxy/api.h>
 #include <haproxy/arg.h>
 #include <haproxy/channel.h>
 #include <haproxy/connection.h>
 #include <haproxy/global.h>
 #include <haproxy/http_rules.h>
 #include <haproxy/proto_tcp.h>
 #include <haproxy/proxy-t.h>
 #include <haproxy/sample.h>
 #include <haproxy/stream-t.h>
 #include <haproxy/tcp_rules.h>
 #include <haproxy/tools.h>

 /*
  * Execute the "set-src" action. May be called from {tcp,http}request.
  * It only changes the address and tries to preserve the original port. If the
  * previous family was neither AF_INET nor AF_INET6, the port is set to zero.
  */
 static enum act_return tcp_action_req_set_src(struct act_rule *rule, struct proxy *px,
                                               struct session *sess, struct stream *s, int flags)
 {
 	struct connection *cli_conn;

 	if ((cli_conn = objt_conn(sess->origin)) && conn_get_src(cli_conn)) {
 		struct sample *smp;

 		smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_ADDR);
 		if (smp) {
 			int port = get_net_port(cli_conn->src);

 			if (smp->data.type == SMP_T_IPV4) {
 				((struct sockaddr_in *)cli_conn->src)->sin_family = AF_INET;
 				((struct sockaddr_in *)cli_conn->src)->sin_addr.s_addr = smp->data.u.ipv4.s_addr;
 				((struct sockaddr_in *)cli_conn->src)->sin_port = port;
 			} else if (smp->data.type == SMP_T_IPV6) {
 				((struct sockaddr_in6 *)cli_conn->src)->sin6_family = AF_INET6;
 				memcpy(&((struct sockaddr_in6 *)cli_conn->src)->sin6_addr, &smp->data.u.ipv6, sizeof(struct in6_addr));
 				((struct sockaddr_in6 *)cli_conn->src)->sin6_port = port;
 			}
 		}
 		cli_conn->flags |= CO_FL_ADDR_FROM_SET;
 	}
 	return ACT_RET_CONT;
 }

 /*
  * Execute the "set-dst" action. May be called from {tcp,http}request.
  * It only changes the address and tries to preserve the original port. If the
  * previous family was neither AF_INET nor AF_INET6, the port is set to zero.
  */
 static enum act_return tcp_action_req_set_dst(struct act_rule *rule, struct proxy *px,
                                               struct session *sess, struct stream *s, int flags)
 {
 	struct connection *cli_conn;

 	if ((cli_conn = objt_conn(sess->origin)) && conn_get_dst(cli_conn)) {
 		struct sample *smp;

 		smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_ADDR);
 		if (smp) {
 			int port = get_net_port(cli_conn->dst);

 			if (smp->data.type == SMP_T_IPV4) {
 				((struct sockaddr_in *)cli_conn->dst)->sin_family = AF_INET;
 				((struct sockaddr_in *)cli_conn->dst)->sin_addr.s_addr = smp->data.u.ipv4.s_addr;
 				((struct sockaddr_in *)cli_conn->dst)->sin_port = port;
 			} else if (smp->data.type == SMP_T_IPV6) {
 				((struct sockaddr_in6 *)cli_conn->dst)->sin6_family = AF_INET6;
 				memcpy(&((struct sockaddr_in6 *)cli_conn->dst)->sin6_addr, &smp->data.u.ipv6, sizeof(struct in6_addr));
 				((struct sockaddr_in6 *)cli_conn->dst)->sin6_port = port;
 			}
 			cli_conn->flags |= CO_FL_ADDR_TO_SET;
 		}
 	}
 	return ACT_RET_CONT;
 }

 /*
  * Execute the "set-src-port" action. May be called from {tcp,http}request.
  * We must test the sin_family before setting the port. If the address family
  * is neither AF_INET nor AF_INET6, the address is forced to AF_INET "0.0.0.0"
  * and the port is assigned.
  */
 static enum act_return tcp_action_req_set_src_port(struct act_rule *rule, struct proxy *px,
                                                    struct session *sess, struct stream *s, int flags)
 {
 	struct connection *cli_conn;

 	if ((cli_conn = objt_conn(sess->origin)) && conn_get_src(cli_conn)) {
 		struct sample *smp;

 		smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_SINT);
 		if (smp) {
 			if (cli_conn->src->ss_family == AF_INET6) {
 				((struct sockaddr_in6 *)cli_conn->src)->sin6_port = htons(smp->data.u.sint);
 			} else {
 				if (cli_conn->src->ss_family != AF_INET) {
 					cli_conn->src->ss_family = AF_INET;
 					((struct sockaddr_in *)cli_conn->src)->sin_addr.s_addr = 0;
 				}
 				((struct sockaddr_in *)cli_conn->src)->sin_port = htons(smp->data.u.sint);
 			}
 		}
 	}
 	return ACT_RET_CONT;
 }

 /*
  * Execute the "set-dst-port" action. May be called from {tcp,http}request.
  * We must test the sin_family before setting the port. If the address family
  * is neither AF_INET nor AF_INET6, the address is forced to AF_INET "0.0.0.0"
  * and the port is assigned.
  */
 static enum act_return tcp_action_req_set_dst_port(struct act_rule *rule, struct proxy *px,
                                                    struct session *sess, struct stream *s, int flags)
 {
 	struct connection *cli_conn;

 	if ((cli_conn = objt_conn(sess->origin)) && conn_get_dst(cli_conn)) {
 		struct sample *smp;

 		smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_SINT);
 		if (smp) {
 			if (cli_conn->dst->ss_family == AF_INET6) {
 				((struct sockaddr_in6 *)cli_conn->dst)->sin6_port = htons(smp->data.u.sint);
 			} else {
 				if (cli_conn->dst->ss_family != AF_INET) {
 					cli_conn->dst->ss_family = AF_INET;
 					((struct sockaddr_in *)cli_conn->dst)->sin_addr.s_addr = 0;
 				}
 				((struct sockaddr_in *)cli_conn->dst)->sin_port = htons(smp->data.u.sint);
 			}
 		}
 	}
 	return ACT_RET_CONT;
 }

 /* Executes the "silent-drop" action. May be called from {tcp,http}{request,response} */
 static enum act_return tcp_exec_action_silent_drop(struct act_rule *rule, struct proxy *px,
                                                    struct session *sess, struct stream *strm, int flags)
 {
 	struct connection *conn = objt_conn(sess->origin);

 	if (!conn)
 		goto out;

 	if (!conn_ctrl_ready(conn))
 		goto out;

 #ifdef TCP_QUICKACK
 	/* drain is needed only to send the quick ACK */
 	conn_ctrl_drain(conn);

 	/* re-enable quickack if it was disabled to ack all data and avoid
 	 * retransmits from the client that might trigger a real reset.
 	 */
 	setsockopt(conn->handle.fd, IPPROTO_TCP, TCP_QUICKACK, &one, sizeof(one));
 #endif
 	/* lingering must absolutely be disabled so that we don't send a
 	 * shutdown(), this is critical to the TCP_REPAIR trick. When no stream
 	 * is present, returning with ERR will cause lingering to be disabled.
 	 */
 	if (strm)
 		strm->si[0].flags |= SI_FL_NOLINGER;

 	/* We're on the client-facing side, we must force to disable lingering to
 	 * ensure we will use an RST exclusively and kill any pending data.
 	 */
 	HA_ATOMIC_OR(&fdtab[conn->handle.fd].state, FD_LINGER_RISK);

 #ifdef TCP_REPAIR
 	if (setsockopt(conn->handle.fd, IPPROTO_TCP, TCP_REPAIR, &one, sizeof(one)) == 0) {
 		/* socket will be quiet now */
 		goto out;
 	}
 #endif
 	/* either TCP_REPAIR is not defined or it failed (eg: permissions).
 	 * Let's fall back on the TTL trick, though it only works for routed
 	 * network and has no effect on local net.
 	 */
 #ifdef IP_TTL
 	if (conn->src && conn->src->ss_family == AF_INET)
 		setsockopt(conn->handle.fd, IPPROTO_IP, IP_TTL, &one, sizeof(one));
 #endif
 #ifdef IPV6_UNICAST_HOPS
 	if (conn->src && conn->src->ss_family == AF_INET6)
 		setsockopt(conn->handle.fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &one, sizeof(one));
 #endif
  out:
 	/* kill the stream if any */
 	if (strm) {
 		channel_abort(&strm->req);
 		channel_abort(&strm->res);
 		strm->req.analysers &= AN_REQ_FLT_END;
 		strm->res.analysers &= AN_RES_FLT_END;
 		if (strm->flags & SF_BE_ASSIGNED)
 			_HA_ATOMIC_INC(&strm->be->be_counters.denied_req);
 		if (!(strm->flags & SF_ERR_MASK))
 			strm->flags |= SF_ERR_PRXCOND;
 		if (!(strm->flags & SF_FINST_MASK))
 			strm->flags |= SF_FINST_R;
 	}

 	_HA_ATOMIC_INC(&sess->fe->fe_counters.denied_req);
 	if (sess->listener && sess->listener->counters)
 		_HA_ATOMIC_INC(&sess->listener->counters->denied_req);

 	return ACT_RET_ABRT;
 }

 /*
  * Release the sample expr when releasing a set src/dst action
  */
 static void release_set_src_dst_action(struct act_rule *rule)
 {
 	release_sample_expr(rule->arg.expr);
 }

 /* parse "set-{src,dst}[-port]" action */
 static enum act_parse_ret tcp_parse_set_src_dst(const char **args, int *orig_arg, struct proxy *px,
                                                 struct act_rule *rule, char **err)
 {
 	int cur_arg;
 	struct sample_expr *expr;
 	unsigned int where;

 	cur_arg = *orig_arg;
 	expr = sample_parse_expr((char **)args, &cur_arg, px->conf.args.file, px->conf.args.line, err, &px->conf.args, NULL);
 	if (!expr)
 		return ACT_RET_PRS_ERR;

 	where = 0;
 	if (px->cap & PR_CAP_FE)
 		where |= SMP_VAL_FE_HRQ_HDR;
 	if (px->cap & PR_CAP_BE)
 		where |= SMP_VAL_BE_HRQ_HDR;

 	if (!(expr->fetch->val & where)) {
 		memprintf(err,
 			  "fetch method '%s' extracts information from '%s', none of which is available here",
 			  args[cur_arg-1], sample_src_names(expr->fetch->use));
 		free(expr);
 		return ACT_RET_PRS_ERR;
 	}
 	rule->arg.expr = expr;
 	rule->action = ACT_CUSTOM;

 	if (strcmp(args[*orig_arg - 1], "set-src") == 0) {
 		rule->action_ptr = tcp_action_req_set_src;
 	} else if (strcmp(args[*orig_arg - 1], "set-src-port") == 0) {
 		rule->action_ptr = tcp_action_req_set_src_port;
 	} else if (strcmp(args[*orig_arg - 1], "set-dst") == 0) {
 		rule->action_ptr = tcp_action_req_set_dst;
 	} else if (strcmp(args[*orig_arg - 1], "set-dst-port") == 0) {
 		rule->action_ptr = tcp_action_req_set_dst_port;
 	} else {
 		return ACT_RET_PRS_ERR;
 	}

 	rule->release_ptr = release_set_src_dst_action;
 	(*orig_arg)++;

 	return ACT_RET_PRS_OK;
 }


 /* Parse a "silent-drop" action. It takes no argument. It returns ACT_RET_PRS_OK on
  * success, ACT_RET_PRS_ERR on error.
  */
 static enum act_parse_ret tcp_parse_silent_drop(const char **args, int *orig_arg, struct proxy *px,
                                                 struct act_rule *rule, char **err)
 {
 	rule->action     = ACT_CUSTOM;
 	rule->action_ptr = tcp_exec_action_silent_drop;
 	return ACT_RET_PRS_OK;
 }


 static struct action_kw_list tcp_req_conn_actions = {ILH, {
 	{ "set-src",      tcp_parse_set_src_dst },
 	{ "set-src-port", tcp_parse_set_src_dst },
 	{ "set-dst"     , tcp_parse_set_src_dst },
 	{ "set-dst-port", tcp_parse_set_src_dst },
 	{ "silent-drop",  tcp_parse_silent_drop },
 	{ /* END */ }
 }};

 INITCALL1(STG_REGISTER, tcp_req_conn_keywords_register, &tcp_req_conn_actions);

 static struct action_kw_list tcp_req_sess_actions = {ILH, {
 	{ "set-src",      tcp_parse_set_src_dst },
 	{ "set-src-port", tcp_parse_set_src_dst },
 	{ "set-dst"     , tcp_parse_set_src_dst },
 	{ "set-dst-port", tcp_parse_set_src_dst },
 	{ "silent-drop",  tcp_parse_silent_drop },
 	{ /* END */ }
 }};

 INITCALL1(STG_REGISTER, tcp_req_sess_keywords_register, &tcp_req_sess_actions);

 static struct action_kw_list tcp_req_cont_actions = {ILH, {
 	{ "set-dst"     , tcp_parse_set_src_dst },
 	{ "set-dst-port", tcp_parse_set_src_dst },
 	{ "silent-drop",  tcp_parse_silent_drop },
 	{ /* END */ }
 }};

 INITCALL1(STG_REGISTER, tcp_req_cont_keywords_register, &tcp_req_cont_actions);

 static struct action_kw_list tcp_res_cont_actions = {ILH, {
 	{ "silent-drop", tcp_parse_silent_drop },
 	{ /* END */ }
 }};

 INITCALL1(STG_REGISTER, tcp_res_cont_keywords_register, &tcp_res_cont_actions);

 static struct action_kw_list http_req_actions = {ILH, {
 	{ "silent-drop",  tcp_parse_silent_drop },
 	{ "set-src",      tcp_parse_set_src_dst },
 	{ "set-src-port", tcp_parse_set_src_dst },
 	{ "set-dst",      tcp_parse_set_src_dst },
 	{ "set-dst-port", tcp_parse_set_src_dst },
 	{ /* END */ }
 }};

 INITCALL1(STG_REGISTER, http_req_keywords_register, &http_req_actions);

 static struct action_kw_list http_res_actions = {ILH, {
 	{ "silent-drop", tcp_parse_silent_drop },
 	{ /* END */ }
 }};

 INITCALL1(STG_REGISTER, http_res_keywords_register, &http_res_actions);


 /*
  * Local variables:
  *  c-indent-level: 8
  *  c-basic-offset: 8
  * End:
  */
	/*
	* AF_INET/AF_INET6 SOCK_STREAM protocol layer (tcp)
	*
	* Copyright 2000-2013 Willy Tarreau <w@1wt.eu>
	*
	* This program 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
	* 2 of the License, or (at your option) any later version.
	*
	*/

	#include <ctype.h>
	#include <errno.h>
	#include <fcntl.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <time.h>

	#include <sys/param.h>
	#include <sys/socket.h>
	#include <sys/types.h>

	#include <netinet/tcp.h>
	#include <netinet/in.h>

	#include <haproxy/action-t.h>
	#include <haproxy/api.h>
	#include <haproxy/arg.h>
	#include <haproxy/channel.h>
	#include <haproxy/connection.h>
	#include <haproxy/global.h>
	#include <haproxy/http_rules.h>
	#include <haproxy/proto_tcp.h>
	#include <haproxy/proxy-t.h>
	#include <haproxy/sample.h>
	#include <haproxy/stream-t.h>
	#include <haproxy/tcp_rules.h>
	#include <haproxy/tools.h>

	/*
	* Execute the "set-src" action. May be called from {tcp,http}request.
	* It only changes the address and tries to preserve the original port. If the
	* previous family was neither AF_INET nor AF_INET6, the port is set to zero.
	*/
	static enum act_return tcp_action_req_set_src(struct act_rule rule, struct proxy px,
	struct session sess, struct stream s, int flags)
	{
	struct connection *cli_conn;

	if ((cli_conn = objt_conn(sess->origin)) && conn_get_src(cli_conn)) {
	struct sample *smp;

	smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ\|SMP_OPT_FINAL, rule->arg.expr, SMP_T_ADDR);
	if (smp) {
	int port = get_net_port(cli_conn->src);

	if (smp->data.type == SMP_T_IPV4) {
	((struct sockaddr_in *)cli_conn->src)->sin_family = AF_INET;
	((struct sockaddr_in *)cli_conn->src)->sin_addr.s_addr = smp->data.u.ipv4.s_addr;
	((struct sockaddr_in *)cli_conn->src)->sin_port = port;
	} else if (smp->data.type == SMP_T_IPV6) {
	((struct sockaddr_in6 *)cli_conn->src)->sin6_family = AF_INET6;
	memcpy(&((struct sockaddr_in6 *)cli_conn->src)->sin6_addr, &smp->data.u.ipv6, sizeof(struct in6_addr));
	((struct sockaddr_in6 *)cli_conn->src)->sin6_port = port;
	}
	}
	cli_conn->flags \|= CO_FL_ADDR_FROM_SET;
	}
	return ACT_RET_CONT;
	}

	/*
	* Execute the "set-dst" action. May be called from {tcp,http}request.
	* It only changes the address and tries to preserve the original port. If the
	* previous family was neither AF_INET nor AF_INET6, the port is set to zero.
	*/
	static enum act_return tcp_action_req_set_dst(struct act_rule rule, struct proxy px,
	struct session sess, struct stream s, int flags)
	{
	struct connection *cli_conn;

	if ((cli_conn = objt_conn(sess->origin)) && conn_get_dst(cli_conn)) {
	struct sample *smp;

	smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ\|SMP_OPT_FINAL, rule->arg.expr, SMP_T_ADDR);
	if (smp) {
	int port = get_net_port(cli_conn->dst);

	if (smp->data.type == SMP_T_IPV4) {
	((struct sockaddr_in *)cli_conn->dst)->sin_family = AF_INET;
	((struct sockaddr_in *)cli_conn->dst)->sin_addr.s_addr = smp->data.u.ipv4.s_addr;
	((struct sockaddr_in *)cli_conn->dst)->sin_port = port;
	} else if (smp->data.type == SMP_T_IPV6) {
	((struct sockaddr_in6 *)cli_conn->dst)->sin6_family = AF_INET6;
	memcpy(&((struct sockaddr_in6 *)cli_conn->dst)->sin6_addr, &smp->data.u.ipv6, sizeof(struct in6_addr));
	((struct sockaddr_in6 *)cli_conn->dst)->sin6_port = port;
	}
	cli_conn->flags \|= CO_FL_ADDR_TO_SET;
	}
	}
	return ACT_RET_CONT;
	}

	/*
	* Execute the "set-src-port" action. May be called from {tcp,http}request.
	* We must test the sin_family before setting the port. If the address family
	* is neither AF_INET nor AF_INET6, the address is forced to AF_INET "0.0.0.0"
	* and the port is assigned.
	*/
	static enum act_return tcp_action_req_set_src_port(struct act_rule rule, struct proxy px,
	struct session sess, struct stream s, int flags)
	{
	struct connection *cli_conn;

	if ((cli_conn = objt_conn(sess->origin)) && conn_get_src(cli_conn)) {
	struct sample *smp;

	smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ\|SMP_OPT_FINAL, rule->arg.expr, SMP_T_SINT);
	if (smp) {
	if (cli_conn->src->ss_family == AF_INET6) {
	((struct sockaddr_in6 *)cli_conn->src)->sin6_port = htons(smp->data.u.sint);
	} else {
	if (cli_conn->src->ss_family != AF_INET) {
	cli_conn->src->ss_family = AF_INET;
	((struct sockaddr_in *)cli_conn->src)->sin_addr.s_addr = 0;
	}
	((struct sockaddr_in *)cli_conn->src)->sin_port = htons(smp->data.u.sint);
	}
	}
	}
	return ACT_RET_CONT;
	}

	/*
	* Execute the "set-dst-port" action. May be called from {tcp,http}request.
	* We must test the sin_family before setting the port. If the address family
	* is neither AF_INET nor AF_INET6, the address is forced to AF_INET "0.0.0.0"
	* and the port is assigned.
	*/
	static enum act_return tcp_action_req_set_dst_port(struct act_rule rule, struct proxy px,
	struct session sess, struct stream s, int flags)
	{
	struct connection *cli_conn;

	if ((cli_conn = objt_conn(sess->origin)) && conn_get_dst(cli_conn)) {
	struct sample *smp;

	smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ\|SMP_OPT_FINAL, rule->arg.expr, SMP_T_SINT);
	if (smp) {
	if (cli_conn->dst->ss_family == AF_INET6) {
	((struct sockaddr_in6 *)cli_conn->dst)->sin6_port = htons(smp->data.u.sint);
	} else {
	if (cli_conn->dst->ss_family != AF_INET) {
	cli_conn->dst->ss_family = AF_INET;
	((struct sockaddr_in *)cli_conn->dst)->sin_addr.s_addr = 0;
	}
	((struct sockaddr_in *)cli_conn->dst)->sin_port = htons(smp->data.u.sint);
	}
	}
	}
	return ACT_RET_CONT;
	}

	/* Executes the "silent-drop" action. May be called from {tcp,http}{request,response} */
	static enum act_return tcp_exec_action_silent_drop(struct act_rule rule, struct proxy px,
	struct session sess, struct stream strm, int flags)
	{
	struct connection *conn = objt_conn(sess->origin);

	if (!conn)
	goto out;

	if (!conn_ctrl_ready(conn))
	goto out;

	#ifdef TCP_QUICKACK
	/* drain is needed only to send the quick ACK */
	conn_ctrl_drain(conn);

	/* re-enable quickack if it was disabled to ack all data and avoid
	* retransmits from the client that might trigger a real reset.
	*/
	setsockopt(conn->handle.fd, IPPROTO_TCP, TCP_QUICKACK, &one, sizeof(one));
	#endif
	/* lingering must absolutely be disabled so that we don't send a
	* shutdown(), this is critical to the TCP_REPAIR trick. When no stream
	* is present, returning with ERR will cause lingering to be disabled.
	*/
	if (strm)
	strm->si[0].flags \|= SI_FL_NOLINGER;

	/* We're on the client-facing side, we must force to disable lingering to
	* ensure we will use an RST exclusively and kill any pending data.
	*/
	HA_ATOMIC_OR(&fdtab[conn->handle.fd].state, FD_LINGER_RISK);

	#ifdef TCP_REPAIR
	if (setsockopt(conn->handle.fd, IPPROTO_TCP, TCP_REPAIR, &one, sizeof(one)) == 0) {
	/* socket will be quiet now */
	goto out;
	}
	#endif
	/* either TCP_REPAIR is not defined or it failed (eg: permissions).
	* Let's fall back on the TTL trick, though it only works for routed
	* network and has no effect on local net.
	*/
	#ifdef IP_TTL
	if (conn->src && conn->src->ss_family == AF_INET)
	setsockopt(conn->handle.fd, IPPROTO_IP, IP_TTL, &one, sizeof(one));
	#endif
	#ifdef IPV6_UNICAST_HOPS
	if (conn->src && conn->src->ss_family == AF_INET6)
	setsockopt(conn->handle.fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &one, sizeof(one));
	#endif
	out:
	/* kill the stream if any */
	if (strm) {
	channel_abort(&strm->req);
	channel_abort(&strm->res);
	strm->req.analysers &= AN_REQ_FLT_END;
	strm->res.analysers &= AN_RES_FLT_END;
	if (strm->flags & SF_BE_ASSIGNED)
	_HA_ATOMIC_INC(&strm->be->be_counters.denied_req);
	if (!(strm->flags & SF_ERR_MASK))
	strm->flags \|= SF_ERR_PRXCOND;
	if (!(strm->flags & SF_FINST_MASK))
	strm->flags \|= SF_FINST_R;
	}

	_HA_ATOMIC_INC(&sess->fe->fe_counters.denied_req);
	if (sess->listener && sess->listener->counters)
	_HA_ATOMIC_INC(&sess->listener->counters->denied_req);

	return ACT_RET_ABRT;
	}

	/*
	* Release the sample expr when releasing a set src/dst action
	*/
	static void release_set_src_dst_action(struct act_rule *rule)
	{
	release_sample_expr(rule->arg.expr);
	}

	/* parse "set-{src,dst}[-port]" action */
	static enum act_parse_ret tcp_parse_set_src_dst(const char *args, int orig_arg, struct proxy *px,
	struct act_rule rule, char *err)
	{
	int cur_arg;
	struct sample_expr *expr;
	unsigned int where;

	cur_arg = *orig_arg;
	expr = sample_parse_expr((char **)args, &cur_arg, px->conf.args.file, px->conf.args.line, err, &px->conf.args, NULL);
	if (!expr)
	return ACT_RET_PRS_ERR;

	where = 0;
	if (px->cap & PR_CAP_FE)
	where \|= SMP_VAL_FE_HRQ_HDR;
	if (px->cap & PR_CAP_BE)
	where \|= SMP_VAL_BE_HRQ_HDR;

	if (!(expr->fetch->val & where)) {
	memprintf(err,
	"fetch method '%s' extracts information from '%s', none of which is available here",
	args[cur_arg-1], sample_src_names(expr->fetch->use));
	free(expr);
	return ACT_RET_PRS_ERR;
	}
	rule->arg.expr = expr;
	rule->action = ACT_CUSTOM;

	if (strcmp(args[*orig_arg - 1], "set-src") == 0) {
	rule->action_ptr = tcp_action_req_set_src;
	} else if (strcmp(args[*orig_arg - 1], "set-src-port") == 0) {
	rule->action_ptr = tcp_action_req_set_src_port;
	} else if (strcmp(args[*orig_arg - 1], "set-dst") == 0) {
	rule->action_ptr = tcp_action_req_set_dst;
	} else if (strcmp(args[*orig_arg - 1], "set-dst-port") == 0) {
	rule->action_ptr = tcp_action_req_set_dst_port;
	} else {
	return ACT_RET_PRS_ERR;
	}

	rule->release_ptr = release_set_src_dst_action;
	(*orig_arg)++;

	return ACT_RET_PRS_OK;
	}


	/* Parse a "silent-drop" action. It takes no argument. It returns ACT_RET_PRS_OK on
	* success, ACT_RET_PRS_ERR on error.
	*/
	static enum act_parse_ret tcp_parse_silent_drop(const char *args, int orig_arg, struct proxy *px,
	struct act_rule rule, char *err)
	{
	rule->action = ACT_CUSTOM;
	rule->action_ptr = tcp_exec_action_silent_drop;
	return ACT_RET_PRS_OK;
	}


	static struct action_kw_list tcp_req_conn_actions = {ILH, {
	{ "set-src", tcp_parse_set_src_dst },
	{ "set-src-port", tcp_parse_set_src_dst },
	{ "set-dst" , tcp_parse_set_src_dst },
	{ "set-dst-port", tcp_parse_set_src_dst },
	{ "silent-drop", tcp_parse_silent_drop },
	{ /* END */ }
	}};

	INITCALL1(STG_REGISTER, tcp_req_conn_keywords_register, &tcp_req_conn_actions);

	static struct action_kw_list tcp_req_sess_actions = {ILH, {
	{ "set-src", tcp_parse_set_src_dst },
	{ "set-src-port", tcp_parse_set_src_dst },
	{ "set-dst" , tcp_parse_set_src_dst },
	{ "set-dst-port", tcp_parse_set_src_dst },
	{ "silent-drop", tcp_parse_silent_drop },
	{ /* END */ }
	}};

	INITCALL1(STG_REGISTER, tcp_req_sess_keywords_register, &tcp_req_sess_actions);

	static struct action_kw_list tcp_req_cont_actions = {ILH, {
	{ "set-dst" , tcp_parse_set_src_dst },
	{ "set-dst-port", tcp_parse_set_src_dst },
	{ "silent-drop", tcp_parse_silent_drop },
	{ /* END */ }
	}};

	INITCALL1(STG_REGISTER, tcp_req_cont_keywords_register, &tcp_req_cont_actions);

	static struct action_kw_list tcp_res_cont_actions = {ILH, {
	{ "silent-drop", tcp_parse_silent_drop },
	{ /* END */ }
	}};

	INITCALL1(STG_REGISTER, tcp_res_cont_keywords_register, &tcp_res_cont_actions);

	static struct action_kw_list http_req_actions = {ILH, {
	{ "silent-drop", tcp_parse_silent_drop },
	{ "set-src", tcp_parse_set_src_dst },
	{ "set-src-port", tcp_parse_set_src_dst },
	{ "set-dst", tcp_parse_set_src_dst },
	{ "set-dst-port", tcp_parse_set_src_dst },
	{ /* END */ }
	}};

	INITCALL1(STG_REGISTER, http_req_keywords_register, &http_req_actions);

	static struct action_kw_list http_res_actions = {ILH, {
	{ "silent-drop", tcp_parse_silent_drop },
	{ /* END */ }
	}};

	INITCALL1(STG_REGISTER, http_res_keywords_register, &http_res_actions);


	/*
	* Local variables:
	* c-indent-level: 8
	* c-basic-offset: 8
	* End:
	*/