core: server signature value can be set via param

- server and user agent signature were only defines so far
- two new parameters server_header and user_agent_header allow
to define them via cfg parameters
- default values are the same so far

cfg.lex

@@ -329,6 +329,8 @@ MEMLOG		"memlog"|"mem_log"
 MEMDBG		"memdbg"|"mem_dbg"
 SIP_WARNING sip_warning
 SERVER_SIGNATURE server_signature
+SERVER_HEADER server_header
+USER_AGENT_HEADER user_agent_header
 REPLY_TO_VIA reply_to_via
 USER		"user"|"uid"
 GROUP		"group"|"gid"
@@ -765,6 +767,8 @@ EAT_ABLE	[\ \t\b\r]
 <INITIAL>{SCTP_MAX_BURST}	{ count(); yylval.strval=yytext;
 										return SCTP_MAX_BURST; }
 <INITIAL>{SERVER_SIGNATURE}	{ count(); yylval.strval=yytext; return SERVER_SIGNATURE; }
+<INITIAL>{SERVER_HEADER}	{ count(); yylval.strval=yytext; return SERVER_HEADER; }
+<INITIAL>{USER_AGENT_HEADER}	{ count(); yylval.strval=yytext; return USER_AGENT_HEADER; }
 <INITIAL>{REPLY_TO_VIA}	{ count(); yylval.strval=yytext; return REPLY_TO_VIA; }
 <INITIAL>{ADVERTISED_ADDRESS}	{	count(); yylval.strval=yytext;
 									return ADVERTISED_ADDRESS; }

cfg.y

@@ -390,6 +390,8 @@ static int case_check_default(struct case_stms* stms);
 %token MEMDBG
 %token SIP_WARNING
 %token SERVER_SIGNATURE
+%token SERVER_HEADER
+%token USER_AGENT_HEADER
 %token REPLY_TO_VIA
 %token LOADMODULE
 %token LOADPATH
@@ -1362,6 +1364,14 @@ assign_stm:
 	| SCTP_MAX_BURST EQUAL error { yyerror("number expected"); }
 	| SERVER_SIGNATURE EQUAL NUMBER { server_signature=$3; }
 	| SERVER_SIGNATURE EQUAL error { yyerror("boolean value expected"); }
+	| SERVER_HEADER EQUAL STRING { server_hdr.s=$3;
+			server_hdr.len=strlen(server_hdr.s);
+	}
+	| SERVER_HEADER EQUAL error { yyerror("string value expected"); }
+	| USER_AGENT_HEADER EQUAL STRING { user_agent_hdr.s=$3;
+			user_agent_hdr.len=strlen(user_agent_hdr.s);
+	}
+	| USER_AGENT_HEADER EQUAL error { yyerror("string value expected"); }
 	| REPLY_TO_VIA EQUAL NUMBER { reply_to_via=$3; }
 	| REPLY_TO_VIA EQUAL error { yyerror("boolean value expected"); }
 	| LISTEN EQUAL id_lst {

globals.h

@@ -108,6 +108,8 @@ extern int syn_branch;
 extern int child_rank;
 extern int sip_warning;
 extern int server_signature;
+extern str server_hdr;
+extern str user_agent_hdr;
 extern char* user;
 extern char* group;
 extern char* sock_user;

main.c

@@ -345,6 +345,8 @@ int sip_warning = 1;
    be default yes, good for trouble-shooting
 */
 int server_signature=1;
+str server_hdr = {SERVER_HDR, SERVER_HDR_LEN};
+str user_agent_hdr = {USER_AGENT, USER_AGENT_LEN};
 /* should ser try to locate outbound interface on multihomed
  * host? by default not -- too expensive
  */

msg_translator.c

@@ -1953,7 +1953,7 @@ char * build_res_buf_from_sip_req( unsigned int code, char *text ,str *new_tag,
 	}
 	/* server header */
 	if (server_signature)
-		len += SERVER_HDR_LEN + CRLF_LEN;
+		len += server_hdr.len + CRLF_LEN;
 	/* warning hdr */
 	if (sip_warning) {
 		warning_buf = warning_builder(msg,&warning_len);
@@ -2092,8 +2092,8 @@ char * build_res_buf_from_sip_req( unsigned int code, char *text ,str *new_tag,
 		}
 	/* server header */
 	if (server_signature) {
-		memcpy( p, SERVER_HDR , SERVER_HDR_LEN );
-		p+=SERVER_HDR_LEN;
+		memcpy( p, server_hdr.s, server_hdr.len );
+		p+=server_hdr.len;
 		memcpy( p, CRLF, CRLF_LEN );
 		p+=CRLF_LEN;
 	}