MEDIUM: tcp/http: add 'set-src-port' action
set-src-port works the same way as 'set-src' but for the source port.
It's available in 'tcp-request connection' and 'http-request' actions.
diff --git a/doc/configuration.txt b/doc/configuration.txt
index f94885f..d3ff223 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -3845,6 +3845,21 @@
When set-src is successful, the source port is set to 0.
+ - set-src-port <expr> :
+ Is used to set the source port address to the value of specified
+ expression.
+
+ <expr> Is a standard HAProxy expression formed by a sample-fetch
+ followed by some converters.
+
+ Example:
+
+ http-request set-src-port hdr(x-port)
+ http-request set-src-port int(4000)
+
+ Be careful to use "set-src-port" after "set-src", because "set-src" sets
+ the source port to 0.
+
- "silent-drop" : this stops the evaluation of the rules and makes the
client-facing connection suddenly disappear using a system-dependant way
that tries to prevent the client from being notified. The effect it then
@@ -8689,6 +8704,20 @@
When set-src is successful, the source port is set to 0.
+ - set-src-port <expr> :
+ Is used to set the source port address to the value of specified
+ expression.
+
+ <expr> Is a standard HAProxy expression formed by a sample-fetch
+ followed by some converters.
+
+ Example:
+
+ tcp-request connection set-src-port int(4000)
+
+ Be careful to use "set-src-port" after "set-src", because "set-src" sets
+ the source port to 0.
+
- "silent-drop" :
This stops the evaluation of the rules and makes the client-facing
connection suddenly disappear using a system-dependant way that tries
diff --git a/src/proto_tcp.c b/src/proto_tcp.c
index 806eb3e..99438d8 100644
--- a/src/proto_tcp.c
+++ b/src/proto_tcp.c
@@ -1453,6 +1453,32 @@
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
+ */
+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_ctrl_ready(cli_conn)) {
+ struct sample *smp;
+
+ conn_get_from_addr(cli_conn);
+
+ smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_SINT);
+ if (smp) {
+ if (((struct sockaddr_storage *)&cli_conn->addr.from)->ss_family == AF_INET) {
+ ((struct sockaddr_in *)&cli_conn->addr.from)->sin_port = htons(smp->data.u.sint);
+ } else if (((struct sockaddr_storage *)&cli_conn->addr.from)->ss_family == AF_INET6) {
+ ((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_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)
{
@@ -2061,7 +2087,7 @@
return -1;
}
-/* parse "set-src" action */
+/* parse "set-src" and "set-src-port" actions */
enum act_parse_ret tcp_parse_set_src(const char **args, int *orig_arg, struct proxy *px, struct act_rule *rule, char **err)
{
int cur_arg;
@@ -2091,6 +2117,8 @@
if (!strcmp(args[*orig_arg-1], "set-src")) {
rule->action_ptr = tcp_action_req_set_src;
+ } else if (!strcmp(args[*orig_arg-1], "set-src-port")) {
+ rule->action_ptr = tcp_action_req_set_src_port;
} else {
return ACT_RET_PRS_ERR;
}
@@ -2493,6 +2521,7 @@
static struct action_kw_list tcp_req_conn_actions = {ILH, {
{ "silent-drop", tcp_parse_silent_drop },
{ "set-src", tcp_parse_set_src },
+ { "set-src-port", tcp_parse_set_src },
{ /* END */ }
}};
@@ -2509,6 +2538,7 @@
static struct action_kw_list http_req_actions = {ILH, {
{ "silent-drop", tcp_parse_silent_drop },
{ "set-src", tcp_parse_set_src },
+ { "set-src-port", tcp_parse_set_src },
{ /* END */ }
}};