Route & Record-Route parser

parser/parse_rr.c

@@ -0,0 +1,171 @@
+/*
+ * $Id$
+ *
+ * Route & Record-Route header field parser
+ *
+ * Copyright (C) 2001-2003 Fhg Fokus
+ *
+ * This file is part of ser, a free SIP server.
+ *
+ * ser is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version
+ *
+ * For a license to use the ser software under conditions
+ * other than those described here, or to purchase support for this
+ * software, please contact iptel.org by e-mail at the following addresses:
+ *    [email protected]
+ *
+ * ser is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License 
+ * along with this program; if not, write to the Free Software 
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include "parse_rr.h"
+#include "../../mem/mem.h"
+#include "../../dprint.h"
+#include "../../trim.h"
+
+
+/*
+ * Parse Route and Record-Route header fields
+ */
+int parse_rr(str* _s, rr_t** _r)
+{
+	rr_t* r, *res, *last;
+	str s;
+	param_hooks_t hooks;
+
+	if (!_s || !_r) {
+		LOG(L_ERR, "parse_rr(): Invalid parameter value\n");
+		return -1;
+	}
+
+	     /* Make a temporary copy of the string */
+	s.s = _s->s;
+	s.len = _s->len;
+
+	res = last = 0;
+
+	while(1) {
+		     /* Allocate and clear rr stucture */
+		r = (rr_t*)pkg_malloc(sizeof(rr_t));
+		if (!r) {
+			LOG(L_ERR, "parse_rr(): No memory left\n");
+			goto error;
+		}
+
+		memset(r, 0, sizeof(rr_t));
+		
+		     /* Parse name-addr part of the header */
+		if (parse_nameaddr(_s, &r->nameaddr) < 0) {
+			LOG(L_ERR, "parse_rr(): Error while parsing name-addr\n");
+			goto error;
+		}
+		
+		     /* Shift just behind the closing > */
+		s.s = r->nameaddr.uri.s + r->nameaddr.uri.len + 1; /* Point just behind > */
+		s.len -= r->nameaddr.name.len + r->nameaddr.uri.len + 2;
+
+		     /* Nothing left, finish */
+		if (s.len == 0) goto ok;
+		
+		if (s.s[0] == ';') {         /* Contact parameter found */
+			s.s++;
+			s.len--;
+			trim_leading(&s);
+			
+			if (s.len == 0) {
+				LOG(L_ERR, "parse_rr(): Error while parsing params\n");
+				goto error;
+			}
+
+			     /* Parse all parameters */
+			if (parse_params(&s, CLASS_RR, &hooks, &r->params) < 0) {
+				LOG(L_ERR, "parse_rr(): Error while parsing params\n");
+				goto error;
+			}
+
+			     /* Copy hooks */
+			r->lr = hooks.rr.lr;
+			r->r2 = hooks.rr.r2;
+
+			if (s.len == 0) goto ok;
+		}
+
+		     /* Next character is comma or end of header*/
+		s.s++;
+		s.len--;
+		trim_leading(&s);
+
+		if (s.len == 0) {
+			LOG(L_ERR, "parse_rr(): Text after comma missing\n");
+			goto error;
+		}
+
+		     /* Append the structure as last parameter of the linked list */
+		if (!res) res = r;
+		if (last) last->next = r;
+		last = r;
+	}
+
+ error:
+	if (r) pkg_free(r);
+	free_rr(res); /* Free any contacts created so far */
+	return -1;
+
+ ok:
+	if (last) last->next = r;
+	*_r = res;
+	return 0;
+}
+
+
+/*
+ * Free list of rrs
+ * _r is head of the list
+ */
+void free_rr(rr_t* _r)
+{
+	rr_t* ptr;
+
+	while(_r) {
+		ptr = _r;
+		_r = _r->next;
+		if (ptr->params) {
+			free_params(ptr->params);
+		}
+		pkg_free(ptr);
+	}
+}
+
+
+/*
+ * Print list of RRs, just for debugging
+ */
+void print_rr(rr_t* _r)
+{
+	rr_t* ptr;
+
+	ptr = _r;
+
+	while(ptr) {
+		printf("---RR---\n");
+		print_nameaddr(&ptr->nameaddr);
+		printf("lr : %p\n", ptr->lr);
+		printf("r2 : %p\n", ptr->r2);
+		if (ptr->params) {
+			print_params(ptr->params);
+		}
+		printf("---/RR---\n");
+		ptr = ptr->next;
+	}
+}

parser/parse_rr.h

@@ -0,0 +1,70 @@
+/*
+ * $Id$
+ *
+ * Route & Record-Route Parser
+ *
+ * Copyright (C) 2001-2003 Fhg Fokus
+ *
+ * This file is part of ser, a free SIP server.
+ *
+ * ser is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version
+ *
+ * For a license to use the ser software under conditions
+ * other than those described here, or to purchase support for this
+ * software, please contact iptel.org by e-mail at the following addresses:
+ *    [email protected]
+ *
+ * ser is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License 
+ * along with this program; if not, write to the Free Software 
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+#ifndef PARSE_RR_H
+#define PARSE_RR_H
+
+#include "../../str.h"
+#include "../parse_nameaddr.h"
+#include "../parse_param.h"
+
+
+/*
+ * Structure representing a Route & Record-Route HF body
+ */
+typedef struct rr {
+	name_addr_t nameaddr; /* Name-addr part */
+	param_t* lr;          /* Hook to lr parameter */
+	param_t* r2;          /* Hook to r2 parameter */
+	param_t* params;      /* Linked list of other parameters */
+        struct rr* next;      /* Next RR in the list */
+} rr_t;
+
+
+/*
+ * Parse Route & Record-Route header fields
+ */
+int parse_rr(str* _s, rr_t** _r);
+
+
+/*
+ * Free list of rr
+ * _c is head of the list
+ */
+void free_rr(rr_t* _r);
+
+
+/*
+ * Print list of rrs, just for debugging
+ */
+void print_rr(rr_t* _r);
+
+
+#endif /* PARSE_RR_H */