core: add sip_parser_log core variable

* when handling non sip messages, parser errors are logged at core level
which defaults to ERR. since this may induce in error sysops or log
scanners, sometimes the core level is set to debug just to omit these
messages from log, which is not good since other messages are omitted
too. this commit adds a new core variable to set the log level for
message parsing errors. this way, we can explicitly set the log level
for message parsing while leaving the core level at ERR.

src/core/cfg.lex

@@ -363,6 +363,7 @@ MEMSAFETY	"mem_safety"
 MEMJOIN		"mem_join"
 MEMSTATUSMODE		"mem_status_mode"
 CORELOG		"corelog"|"core_log"
+SIP_PARSER_LOG "sip_parser_log"
 SIP_WARNING sip_warning
 SERVER_SIGNATURE server_signature
 SERVER_HEADER server_header
@@ -810,6 +811,7 @@ IMPORTFILE      "import_file"
 <INITIAL>{MEMSAFETY}	{ count(); yylval.strval=yytext; return MEMSAFETY; }
 <INITIAL>{MEMJOIN}	{ count(); yylval.strval=yytext; return MEMJOIN; }
 <INITIAL>{MEMSTATUSMODE}	{ count(); yylval.strval=yytext; return MEMSTATUSMODE; }
+<INITIAL>{SIP_PARSER_LOG}  { count(); yylval.strval=yytext; return SIP_PARSER_LOG; }
 <INITIAL>{CORELOG}	{ count(); yylval.strval=yytext; return CORELOG; }
 <INITIAL>{SIP_WARNING}	{ count(); yylval.strval=yytext; return SIP_WARNING; }
 <INITIAL>{USER}		{ count(); yylval.strval=yytext; return USER; }

src/core/cfg.y

@@ -388,6 +388,7 @@ extern char *default_routename;
 %token MEMSAFETY
 %token MEMJOIN
 %token MEMSTATUSMODE
+%token SIP_PARSER_LOG
 %token CORELOG
 %token SIP_WARNING
 %token SERVER_SIGNATURE
@@ -943,6 +944,8 @@ assign_stm:
 	| MEMJOIN EQUAL error { yyerror("int value expected"); }
 	| MEMSTATUSMODE EQUAL intno { default_core_cfg.mem_status_mode=$3; }
 	| MEMSTATUSMODE EQUAL error { yyerror("int value expected"); }
+	| SIP_PARSER_LOG EQUAL intno { default_core_cfg.sip_parser_log=$3; }
+	| SIP_PARSER_LOG EQUAL error { yyerror("int value expected"); }
 	| CORELOG EQUAL intno { default_core_cfg.corelog=$3; }
 	| CORELOG EQUAL error { yyerror("int value expected"); }
 	| SIP_WARNING EQUAL NUMBER { sip_warning=$3; }

src/core/cfg_core.c

@@ -115,6 +115,7 @@ struct cfg_group_core default_core_cfg = {
 	1, /*!< mem_safety - 0 disabled; 1 enabled */
 	1, /*!< mem_join - 1 enabled */
 	0, /*!< mem_status_mode - 0 only free fragments, 1 all fragements */
+	L_ERR, /*!< sip msg parser error log level*/
 	L_ERR, /*!< corelog */
 	L_DBG, /*!< latency cfg log */
 	L_ERR, /*!< latency log */
@@ -318,6 +319,8 @@ cfg_def_t core_cfg_def[] = {
 		"join free memory fragments"},
 	{"mem_status_mode",		CFG_VAR_INT|CFG_ATOMIC,	0, 0, 0, 0,
 		"print status for free or all memory fragments"},
+	{"sip_parser_log",		CFG_VAR_INT|CFG_ATOMIC,	0, 0, 0, 0,
+		"log level for sip msg parser error messages"},
 	{"corelog",		CFG_VAR_INT|CFG_ATOMIC,	0, 0, 0, 0,
 		"log level for non-critical core error messages"},
 	{"latency_cfg_log",		CFG_VAR_INT|CFG_ATOMIC,	0, 0, 0, 0,

src/core/cfg_core.h

@@ -103,6 +103,7 @@ struct cfg_group_core {
 	int mem_safety; /*!< memory safety control option */
 	int mem_join; /*!< memory free fragments join option */
 	int mem_status_mode; /*!< memory status printed for free/all fragments */
+	int sip_parser_log; /*!< sip msg parser error log level*/
 	int corelog; /*!< log level for non-critcal core error messages */
 	int latency_cfg_log; /*!< log level for printing latency of routing blocks */
 	int latency_log; /*!< log level for latency limits messages */

src/core/parser/msg_parser.c

@@ -677,7 +677,7 @@ int parse_msg(char* const buf, const unsigned int len, struct sip_msg* const msg
 
 error:
 	/* more debugging, msg->orig is/should be null terminated*/
-	LOG(cfg_get(core, core_cfg, corelog), "ERROR: parse_msg: message=<%.*s>\n",
+	LOG(cfg_get(core, core_cfg, sip_parser_log), "ERROR: parse_msg: message=<%.*s>\n",
 			(int)msg->len, ZSW(msg->buf));
 	return -1;
 }

src/core/parser/parse_fline.c

@@ -268,7 +268,7 @@ char* parse_first_line(char* buffer, unsigned int len, struct msg_start* fl)
 	}
 error1:
 	fl->type=SIP_INVALID;
-	LOG(cfg_get(core, core_cfg, corelog), "parse_first_line: bad message (offset: %d)\n", offset);
+	LOG(cfg_get(core, core_cfg, sip_parser_log), "parse_first_line: bad message (offset: %d)\n", offset);
 	/* skip  line */
 	nl=eat_line(buffer,len);
 	return nl;

src/core/receive.c

@@ -304,7 +304,7 @@ int receive_msg(char *buf, unsigned int len, receive_info_t *rcv_info)
 		}
 	}
 	if(errsipmsg==1) {
-		LOG(cfg_get(core, core_cfg, corelog),
+		LOG(cfg_get(core, core_cfg, sip_parser_log),
 				"core parsing of SIP message failed (%s:%d/%d)\n",
 				ip_addr2a(&msg->rcv.src_ip), (int)msg->rcv.src_port,
 				(int)msg->rcv.proto);