uac_redirect: Use Contact's "flags" header parameter into branch flags.

src/modules/uac_redirect/doc/uac_redirect_admin.xml

@@ -302,8 +302,46 @@ branch_route[1] {
 				</programlisting>
 			</example>
 		</section>
+		<section>
+			<title><varname>flags_hdr_mode</varname> (int)</title>
+			<para>
+			Specifies if and how a Contact&apos;s flags header parameter
+			must be used. If set, and a flags header parameter is set,
+			its value will be set as branch flags for that contact.
+			</para>
+			<para>
+			Its values may be:
+			</para>
+			<itemizedlist>
+				<listitem>
+				<para><emphasis>0</emphasis> - ignore flags header parameter,
+				just use bflags module parameter</para>
+				</listitem>
+				<listitem>
+				<para><emphasis>1</emphasis> - use flags header parameter if
+				present, ignore bflags module parameter</para>
+				</listitem>
+				<listitem>
+				<para><emphasis>2</emphasis> - use flags header parameter if
+				present and merge (binary or) it with the bflags module
+				parameter</para>
+				</listitem>
+			</itemizedlist>
+			<para>
+				<emphasis>
+					The default value is <quote>0</quote>.
+				</emphasis>
+			</para>
+			<example>
+				<title>Set <varname>flags_hdr_mode</varname> parameter</title>
+				<programlisting format="linespecific">
+...
+modparam("uac_redirect","flags_hdr_mode",2)
+...
+				</programlisting>
+			</example>
+		</section>
 	</section>
-
 	<section>
 		<title>Functions</title>
 		<section id="uac_redirect.f.set_deny_filter">

src/modules/uac_redirect/rd_funcs.c

@@ -199,6 +199,7 @@ static int shmcontact2dset(struct sip_msg *req, struct sip_msg *sh_rpl,
 	int added;
 	int dup;
 	int ret;
+	unsigned int flags;
 
 	/* dup can be:
 	 *    0 - sh reply but nothing duplicated 
@@ -294,8 +295,14 @@ static int shmcontact2dset(struct sip_msg *req, struct sip_msg *sh_rpl,
 		LM_DBG("adding contact <%.*s>\n", scontacts[i]->uri.len,
 				scontacts[i]->uri.s);
 		if(sruid_next(&_redirect_sruid)==0) {
+			if (flags_hdr_mode && scontacts[i]->flags && str2int(&(scontacts[i]->flags->body), &flags) == 0) {
+				if (flags_hdr_mode == 2)
+					flags |= bflags;
+			} else {
+				flags = bflags;
+			}
 			if(append_branch( 0, &scontacts[i]->uri, 0, 0, sqvalues[i],
-						bflags, 0, &_redirect_sruid.uid, 0,
+						flags, 0, &_redirect_sruid.uid, 0,
 						&_redirect_sruid.uid, &_redirect_sruid.uid)<0) {
 				LM_ERR("failed to add contact to dset\n");
 			} else {

src/modules/uac_redirect/rd_funcs.h

@@ -36,6 +36,8 @@ extern cmd_function   rd_acc_fct;
 
 extern char *acc_db_table;
 
+extern int flags_hdr_mode;
+
 int get_redirect( struct sip_msg *msg , int maxt, int maxb,
 		struct acc_param *reason, unsigned int bflags);
 

src/modules/uac_redirect/uac_redirect.c

@@ -48,6 +48,7 @@ char *accept_filter_s = 0;
 char *def_filter_s = 0;
 
 unsigned int bflags = 0;
+int flags_hdr_mode = 0;
 
 #define ACCEPT_RULE_STR "accept"
 #define DENY_RULE_STR   "deny"
@@ -86,6 +87,7 @@ static param_export_t params[] = {
 	{"acc_function",    PARAM_STRING,  &acc_fct_s        },
 	{"acc_db_table",    PARAM_STRING,  &acc_db_table     },
 	{"bflags",    		INT_PARAM,  &bflags			  },
+	{"flags_hdr_mode",	INT_PARAM,  &flags_hdr_mode	  },
 	{0, 0, 0}
 };