parser: refactored a bit sip_msg_t struct for extra fields needed per process

- a new structure to keep cached decoded flow for outbound, previously
  was declared inline
- easier to reset it for shm clone and tm faked environment
- new fields that are needed inside the sip_msg_t but not cloned in shm,
  must be added in the msg_ldata_t structure, accessible via ldv field

parser/msg_parser.c

@@ -734,6 +734,7 @@ void free_sip_msg(struct sip_msg* const msg)
 	if (msg->add_rm)      free_lump_list(msg->add_rm);
 	if (msg->body_lumps)  free_lump_list(msg->body_lumps);
 	if (msg->reply_lump)   free_reply_lump(msg->reply_lump);
+	msg_ldata_reset(msg);
 	/* don't free anymore -- now a pointer to a static buffer */
 #	ifdef DYN_BUF
 	pkg_free(msg->buf);
@@ -952,6 +953,16 @@ void reset_ua(struct sip_msg* const msg)
 	msg->location_ua.len = 0;
 }
 
+/**
+ * reset content of msg->ldv (msg_ldata_t structure)
+ */
+void msg_ldata_reset(sip_msg_t *msg)
+{
+	if(msg==NULL)
+		return;
+	memset(&msg->ldv, 0, sizeof(msg_ldata_t));
+}
+
 
 hdr_field_t* get_hdr(const sip_msg_t* const msg, const enum _hdr_types_t ht)
 {

parser/msg_parser.h

@@ -253,6 +253,19 @@ typedef struct msg_body {
 /* pre-declaration, to include sys/time.h in .c */
 struct timeval;
 
+/* structure for cached decoded flow for outbound */
+typedef struct ocd_flow {
+		int decoded;
+		struct receive_info rcv;
+} ocd_flow_t;
+
+/* structure holding fields that don't have to be cloned in shm
+ * - its content is memset'ed to in shm clone
+ * - add to msg_ldata_reset() if a field uses dynamic memory */
+typedef struct msg_ldata {
+	ocd_flow_t flow;
+} msg_ldata_t;
+
 /*! \brief The SIP message */
 typedef struct sip_msg {
 	unsigned int id;               /*!< message id, unique/process*/
@@ -363,10 +376,9 @@ typedef struct sip_msg {
 	str ruid;
 	str location_ua;
 
-	struct {
-		int decoded;
-		struct receive_info rcv;
-	} flow;
+	/* structure with fields that are needed for local processing
+	 * - not cloned to shm, reset to 0 in the clone */
+	msg_ldata_t ldv;
 
 	/* IMPORTANT: when adding new fields in this structure (sip_msg_t),
 	 * be sure it is freed in free_sip_msg() and it is cloned or reset
@@ -514,4 +526,9 @@ int msg_ctx_id_match(const sip_msg_t* const msg, const msg_ctx_id_t* const mid);
  */
 int msg_set_time(sip_msg_t* const msg);
 
+/**
+ * reset content of msg->ldv (msg_ldata_t structure)
+ */
+void msg_ldata_reset(sip_msg_t*);
+
 #endif