Extend the parser parameter with support for dialog event parameters.

This patch extends the generic parameter parser in the sip-router core
with support for the following dialog event package parameters: call-id,
from-tag, to-tag, include-session-description, and sla.

The patch introduces a new parameter class called CLASS_EVENT_DIALOG
which can be used to instruct the parser to look for the well-known
parameters above.

It also adds a new parameter hook structure called event_dialog_hooks
which will be filled with pointers to the well known parameters if
the are found in the parsed string.

parser/parse_param.c

@@ -43,6 +43,66 @@
 #include "parse_param.h"
 
 
+static inline void parse_event_dialog_class(param_hooks_t* h, param_t* p)
+{
+
+	if (!p->name.s) {
+		LOG(L_ERR, "ERROR: parse_event_dialog_class: empty value\n");
+		return;
+	}
+	if (!h) {
+		LOG(L_CRIT, "BUG: parse_event_dialog_class: NULL param hook pointer\n");
+		return;
+	}
+	switch(p->name.s[0]) {
+	case 'c':
+	case 'C':
+		if ((p->name.len == 7) &&
+		    (!strncasecmp(p->name.s + 1, "all-id", 6))) {
+			p->type = P_CALL_ID;
+			h->event_dialog.call_id = p;
+		}
+		break;
+
+	case 'f':
+	case 'F':
+		if ((p->name.len == 8) &&
+		    (!strncasecmp(p->name.s + 1, "rom-tag", 7))) {
+			p->type = P_FROM_TAG;
+			h->event_dialog.from_tag = p;
+		}
+		break;
+
+	case 't':
+	case 'T':
+		if ((p->name.len == 6) &&
+		    (!strncasecmp(p->name.s + 1, "o-tag", 5))) {
+			p->type = P_TO_TAG;
+			h->event_dialog.to_tag = p;
+		}
+		break;
+
+	case 'i':
+	case 'I':
+		if ((p->name.len == 27) &&
+		    (!strncasecmp(p->name.s + 1, "nclude-session-description", 26))) {
+			p->type = P_ISD;
+			h->event_dialog.include_session_description = p;
+		}
+		break;
+
+	case 's':
+	case 'S':
+		if ((p->name.len == 3) &&
+		    (!strncasecmp(p->name.s + 1, "la", 2))) {
+			p->type = P_SLA;
+			h->event_dialog.sla = p;
+		}
+		break;
+	}
+}
+
+
 /*
  * Try to find out parameter name, recognized parameters
  * are q, expires and method
@@ -328,6 +388,7 @@ static inline void parse_param_name(str* _s, pclass_t _c, param_hooks_t* _h, par
 	switch(_c) {
 	case CLASS_CONTACT: parse_contact_class(_h, _p); break;
 	case CLASS_URI:     parse_uri_class(_h, _p);     break;
+	case CLASS_EVENT_DIALOG: parse_event_dialog_class(_h, _p); break;
 	default: break;
 	}
 }
@@ -545,6 +606,11 @@ static inline void print_param(FILE* _o, param_t* _p)
 	case P_DSTPORT:   type = "P_DSTPORT";   break;
 	case P_INSTANCE:  type = "P_INSTANCE";  break;
 	case P_FTAG:      type = "P_FTAG";      break;
+	case P_CALL_ID:   type = "P_CALL_ID";   break;
+	case P_FROM_TAG:  type = "P_FROM_TAG";  break;
+	case P_TO_TAG:    type = "P_TO_TAG";    break;
+	case P_ISD:       type = "P_ISD";       break;
+	case P_SLA:       type = "P_SLA";       break;
 	default:          type = "UNKNOWN";     break;
 	}
 	

parser/parse_param.h

@@ -56,7 +56,12 @@ typedef enum ptype {
 	P_DSTIP,     /* URI: dstip parameter */
 	P_DSTPORT,   /* URi: dstport parameter */
 	P_INSTANCE,  /* Contact: sip.instance parameter */
-	P_FTAG       /* URI: ftag parameter */
+	P_FTAG,      /* URI: ftag parameter */
+	P_CALL_ID,   /* Dialog event package: call-id */
+	P_FROM_TAG,  /* Dialog event package: from-tag */
+	P_TO_TAG,    /* Dialog event package: to-tag */
+	P_ISD,       /* Dialog event package: include-session-description */
+	P_SLA        /* Dialog event package: sla */
 } ptype_t;
 
 
@@ -64,9 +69,10 @@ typedef enum ptype {
  * Class of parameters
  */
 typedef enum pclass {
-	CLASS_ANY = 0,  /* Any parameters, well-known hooks will be not used */
-	CLASS_CONTACT,  /* Contact parameters */
-	CLASS_URI       /* URI parameters */
+	CLASS_ANY = 0,      /* Any parameters, well-known hooks will be not used */
+	CLASS_CONTACT,      /* Contact parameters */
+	CLASS_URI,          /* URI parameters */
+	CLASS_EVENT_DIALOG  /* Event dialog parameters */
 } pclass_t;
 
 
@@ -109,12 +115,21 @@ struct uri_hooks {
 };
 
 
+struct event_dialog_hooks {
+	struct param* call_id;
+	struct param* from_tag;
+	struct param* to_tag;
+	struct param* include_session_description;
+	struct param* sla;
+};
+
 /*
  * Union of hooks structures for all classes
  */
 typedef union param_hooks {
 	struct contact_hooks contact; /* Contact hooks */
 	struct uri_hooks uri;         /* URI hooks */
+	struct event_dialog_hooks event_dialog;
 } param_hooks_t;
 
 /**