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180 lines
4.0 KiB
180 lines
4.0 KiB
/*
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* Diversion Header Field Support
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*
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* Copyright (C) 2004 FhG Fokus
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*
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* This file is part of Kamailio, a free SIP server.
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*
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* Kamailio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version
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*
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* Kamailio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include "../../sr_module.h"
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#include "../../error.h"
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#include "../../dprint.h"
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#include "../../mem/mem.h"
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#include "../../data_lump.h"
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#include "../../mod_fix.h"
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MODULE_VERSION
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#define DIVERSION_HF "Diversion"
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#define DIVERSION_HF_LEN (sizeof(DIVERSION_HF) - 1)
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#define DIVERSION_PREFIX DIVERSION_HF ": <"
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#define DIVERSION_PREFIX_LEN (sizeof(DIVERSION_PREFIX) - 1)
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#define DIVERSION_SUFFIX ">;reason="
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#define DIVERSION_SUFFIX_LEN (sizeof(DIVERSION_SUFFIX) - 1)
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str suffix = {"", 0};
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int add_diversion(struct sip_msg* msg, char* r, char* u);
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/*
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* Exported functions
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*/
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static cmd_export_t cmds[] = {
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{"add_diversion", (cmd_function)add_diversion, 1, fixup_spve_null,
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0, REQUEST_ROUTE|FAILURE_ROUTE|BRANCH_ROUTE},
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{"add_diversion", (cmd_function)add_diversion, 2, fixup_spve_spve,
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0, REQUEST_ROUTE|FAILURE_ROUTE|BRANCH_ROUTE},
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{0, 0, 0, 0, 0, 0}
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};
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/*
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* Exported parameters
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*/
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static param_export_t params[] = {
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{"suffix", PARAM_STR, &suffix},
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{0, 0, 0}
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};
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/*
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* Module interface
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*/
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struct module_exports exports = {
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"diversion",
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DEFAULT_DLFLAGS, /* dlopen flags */
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cmds, /* Exported functions */
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params, /* Exported parameters */
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0, /* exported statistics */
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0, /* exported MI functions */
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0, /* exported pseudo-variables */
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0, /* extra processes */
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0, /* module initialization function */
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0, /* response function */
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0, /* destroy function */
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0 /* child initialization function */
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};
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static inline int add_diversion_helper(struct sip_msg* msg, str* s)
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{
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char *ptr;
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int is_ref;
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struct lump* anchor = 0;
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if (!msg->diversion && parse_headers(msg, HDR_DIVERSION_F, 0) == -1) {
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LM_ERR("header parsing failed\n");
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return -1;
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}
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if (msg->diversion) {
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/* Insert just before the topmost Diversion header */
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ptr = msg->diversion->name.s;
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} else {
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/* Insert at the end */
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ptr = msg->unparsed;
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}
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anchor = anchor_lump2(msg, ptr - msg->buf, 0, 0, &is_ref);
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if (!anchor) {
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LM_ERR("can't get anchor\n");
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return -2;
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}
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if (!insert_new_lump_before(anchor, s->s, s->len, 0)) {
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LM_ERR("can't insert lump\n");
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return -3;
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}
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return 0;
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}
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int add_diversion(struct sip_msg* msg, char* r, char* u)
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{
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str div_hf;
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char *at;
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str uri;
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str reason;
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if(fixup_get_svalue(msg, (gparam_t*)r, &reason)<0)
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{
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LM_ERR("cannot get the script\n");
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return -1;
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}
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if(u==NULL) {
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uri = msg->first_line.u.request.uri;
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} else {
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if(fixup_get_svalue(msg, (gparam_t*)u, &uri)<0)
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{
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LM_ERR("cannot get the uri parameter\n");
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return -1;
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}
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}
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div_hf.len = DIVERSION_PREFIX_LEN + uri.len + DIVERSION_SUFFIX_LEN + reason.len + CRLF_LEN;
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div_hf.s = pkg_malloc(div_hf.len);
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if (!div_hf.s) {
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LM_ERR("no pkg memory left\n");
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return -1;
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}
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at = div_hf.s;
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memcpy(at, DIVERSION_PREFIX, DIVERSION_PREFIX_LEN);
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at += DIVERSION_PREFIX_LEN;
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memcpy(at, uri.s, uri.len);
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at += uri.len;
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memcpy(at, DIVERSION_SUFFIX, DIVERSION_SUFFIX_LEN);
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at += DIVERSION_SUFFIX_LEN;
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memcpy(at, reason.s, reason.len);
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at += reason.len;
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memcpy(at, CRLF, CRLF_LEN);
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if (add_diversion_helper(msg, &div_hf) < 0) {
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pkg_free(div_hf.s);
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return -1;
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}
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return 1;
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}
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