[SR-Dev] git:janakj/kcore: Adding the supported parser from kamailio core
Jan Janak
jan at iptel.org
Sun Mar 29 22:03:00 CEST 2009
Module: sip-router
Branch: janakj/kcore
Commit: cb0dd941f2b0d9a579bb98c6689ecabaf7189a6c
URL: http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=cb0dd941f2b0d9a579bb98c6689ecabaf7189a6c
Author: Jan Janak <jan at iptel.org>
Committer: Jan Janak <jan at iptel.org>
Date: Sun Mar 29 21:50:15 2009 +0200
Adding the supported parser from kamailio core
---
lib/kcore/parse_supported.c | 143 +++++++++++++++++++++++++++++++++++++++++++
lib/kcore/parse_supported.h | 84 +++++++++++++++++++++++++
2 files changed, 227 insertions(+), 0 deletions(-)
diff --git a/lib/kcore/parse_supported.c b/lib/kcore/parse_supported.c
new file mode 100644
index 0000000..ddecf50
--- /dev/null
+++ b/lib/kcore/parse_supported.c
@@ -0,0 +1,143 @@
+/*
+ * $Id$
+ *
+ * Copyright (C) 2006 Andreas Granig <agranig at linguin.org>
+ *
+ * This file is part of Kamailio, a free SIP server.
+ *
+ * Kamailio 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
+ *
+ * Kamailio 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
+ */
+
+/*!
+ * \file
+ * \brief Supported parser
+ * \ingroup parser
+ */
+
+#include "../mem/mem.h"
+#include "keys.h"
+#include "parse_supported.h"
+
+#define IS_DELIM(c) (*(c) == ' ' || *(c) == '\t' || *(c) == '\r' || *(c) == '\n' || *(c) == ',')
+
+/* from parser/parse_hname2.c: */
+#define LOWER_BYTE(b) ((b) | 0x20)
+#define LOWER_DWORD(d) ((d) | 0x20202020)
+#define READ(val) \
+ (*(val + 0) + (*(val + 1) << 8) + (*(val + 2) << 16) + (*(val + 3) << 24))
+
+
+/*!
+ * Parse Supported HF body.
+ */
+static inline int parse_supported_body(str *body, unsigned int *sup)
+{
+ register char* p;
+ register unsigned int val;
+ int len, pos = 0;
+
+ *sup = 0;
+
+ p = body->s;
+ len = body->len;
+
+ while (pos < len) {
+ /* skip spaces and commas */
+ for (; pos < len && IS_DELIM(p); ++pos, ++p);
+
+ val = LOWER_DWORD(READ(p));
+ switch (val) {
+
+ /* "path" */
+ case _path_:
+ if(pos + 4 <= len && IS_DELIM(p+4)) {
+ *sup |= F_SUPPORTED_PATH;
+ pos += 5; p += 5;
+ }
+ break;
+
+ /* "100rel" */
+ case _100r_:
+ if ( pos+6 <= len
+ && LOWER_BYTE(*(p+4))=='e' && LOWER_BYTE(*(p+5))=='l'
+ && IS_DELIM(p+6)) {
+ *sup |= F_SUPPORTED_100REL;
+ pos += SUPPORTED_100REL_LEN + 1;
+ p += SUPPORTED_100REL_LEN + 1;
+ }
+ break;
+
+ /* "timer" */
+ case _time_:
+ if ( pos+5 <= len && LOWER_BYTE(*(p+4))=='r'
+ && IS_DELIM(p+5) ) {
+ *sup |= F_SUPPORTED_TIMER;
+ pos += SUPPORTED_TIMER_LEN + 1;
+ p += SUPPORTED_TIMER_LEN + 1;
+ }
+ break;
+
+ /* unknown */
+ default:
+ /* skip element */
+ for (; pos < len && !IS_DELIM(p); ++pos, ++p);
+ break;
+ }
+ }
+
+ return 0;
+}
+
+/*!
+ * Parse all Supported headers
+ */
+int parse_supported( struct sip_msg *msg)
+{
+ unsigned int supported;
+ struct hdr_field *hdr;
+ struct supported_body *sb;
+
+ /* maybe the header is already parsed! */
+ if (msg->supported && msg->supported->parsed)
+ return 0;
+
+ /* parse to the end in order to get all SUPPORTED headers */
+ if (parse_headers(msg,HDR_EOH_F,0)==-1 || !msg->supported)
+ return -1;
+
+ /* bad luck! :-( - we have to parse them */
+ supported = 0;
+ for( hdr=msg->supported ; hdr ; hdr=hdr->sibling) {
+ if (hdr->parsed) {
+ supported |= ((struct supported_body*)hdr->parsed)->supported;
+ continue;
+ }
+
+ sb = (struct supported_body*)pkg_malloc(sizeof(struct supported_body));
+ if (sb == 0) {
+ LM_ERR("out of pkg_memory\n");
+ return -1;
+ }
+
+ parse_supported_body(&(hdr->body), &(sb->supported));
+ sb->supported_all = 0;
+ hdr->parsed = (void*)sb;
+ supported |= sb->supported;
+ }
+
+ ((struct supported_body*)msg->supported->parsed)->supported_all =
+ supported;
+ return 0;
+}
diff --git a/lib/kcore/parse_supported.h b/lib/kcore/parse_supported.h
new file mode 100644
index 0000000..9a177fd
--- /dev/null
+++ b/lib/kcore/parse_supported.h
@@ -0,0 +1,84 @@
+/*
+ * $Id$
+ *
+ * Copyright (C) 2006 Andreas Granig <agranig at linguin.org>
+ *
+ * This file is part of Kamailio, a free SIP server.
+ *
+ * Kamailio 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
+ *
+ * Kamailio 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
+ *
+ *
+ * History:
+ * -------
+ * 2006-03-02 parse_supported() parses and cumulates all SUPPORTED
+ * headers (bogdan)
+ */
+
+/*!
+ * \file
+ * \brief Supported parser
+ * \ingroup parser
+ */
+
+#ifndef PARSE_SUPPORTED_H
+#define PARSE_SUPPORTED_H
+
+#include "msg_parser.h"
+#include "../mem/mem.h"
+
+
+#define F_SUPPORTED_PATH (1 << 0)
+#define F_SUPPORTED_100REL (1 << 1)
+#define F_SUPPORTED_TIMER (1 << 2)
+
+#define SUPPORTED_PATH_STR "path"
+#define SUPPORTED_PATH_LEN (sizeof(SUPPORTED_PATH_STR)-1)
+
+/* RFC 3262 */
+#define SUPPORTED_100REL_STR "100rel"
+#define SUPPORTED_100REL_LEN (sizeof(SUPPORTED_100REL_STR)-1)
+
+/* RFC 4028 */
+#define SUPPORTED_TIMER_STR "timer"
+#define SUPPORTED_TIMER_LEN (sizeof(SUPPORTED_TIMER_STR)-1)
+
+
+#define get_supported(p_msg) \
+ ((p_msg)->supported ? ((struct supported_body*)(p_msg)->supported->parsed)->supported_all : 0)
+
+
+struct supported_body {
+ unsigned int supported; /* supported mask for the current hdr */
+ unsigned int supported_all; /* suppoted mask for the all "supported" hdr
+ * - it's set only for the first hdr in
+ * sibling list*/
+};
+
+
+/*!
+ * Parse all Supported headers.
+ */
+int parse_supported( struct sip_msg *msg);
+
+
+static inline void free_supported(struct supported_body **sb)
+{
+ if (sb && *sb) {
+ pkg_free(*sb);
+ *sb = 0;
+ }
+}
+
+#endif /* PARSE_SUPPORTED_H */
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