mirror of
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268 lines
6.9 KiB
C
268 lines
6.9 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2013, Digium, Inc.
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*
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* Mark Michelson <mmichelson@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*** MODULEINFO
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<depend>pjproject</depend>
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<depend>res_pjsip</depend>
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<defaultenabled>yes</defaultenabled>
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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ASTERISK_REGISTER_FILE()
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#include <pjsip.h>
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#include "asterisk/res_pjsip.h"
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#include "asterisk/module.h"
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#include "asterisk/logger.h"
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#include "asterisk/cli.h"
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#include "asterisk/netsock2.h"
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enum pjsip_logging_mode {
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LOGGING_MODE_DISABLED, /* No logging is enabled */
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LOGGING_MODE_ENABLED, /* Logging is enabled */
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};
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static enum pjsip_logging_mode logging_mode;
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static struct ast_sockaddr log_addr;
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/*! \brief Return the first entry from ast_sockaddr_resolve filtered by address family
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*
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* \warning Using this function probably means you have a faulty design.
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* \note This function was taken from the function of the same name in chan_sip.c
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*/
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static int ast_sockaddr_resolve_first_af(struct ast_sockaddr *addr,
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const char* name, int flag, int family)
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{
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struct ast_sockaddr *addrs;
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int addrs_cnt;
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addrs_cnt = ast_sockaddr_resolve(&addrs, name, flag, family);
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if (addrs_cnt <= 0) {
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return 1;
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}
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if (addrs_cnt > 1) {
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ast_debug(1, "Multiple addresses, using the first one only\n");
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}
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ast_sockaddr_copy(addr, &addrs[0]);
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ast_free(addrs);
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return 0;
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}
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/*! \brief See if we pass debug IP filter */
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static inline int pjsip_log_test_addr(const char *address, int port)
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{
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struct ast_sockaddr test_addr;
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if (logging_mode == LOGGING_MODE_DISABLED) {
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return 0;
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}
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/* A null logging address means we'll debug any address */
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if (ast_sockaddr_isnull(&log_addr)) {
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return 1;
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}
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/* A null address was passed in. Just reject it. */
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if (ast_strlen_zero(address)) {
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return 0;
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}
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ast_sockaddr_parse(&test_addr, address, PARSE_PORT_IGNORE);
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ast_sockaddr_set_port(&test_addr, port);
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/* If no port was specified for a debug address, just compare the
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* addresses, otherwise compare the address and port
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*/
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if (ast_sockaddr_port(&log_addr)) {
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return !ast_sockaddr_cmp(&log_addr, &test_addr);
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} else {
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return !ast_sockaddr_cmp_addr(&log_addr, &test_addr);
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}
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}
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static pj_status_t logging_on_tx_msg(pjsip_tx_data *tdata)
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{
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if (!pjsip_log_test_addr(tdata->tp_info.dst_name, tdata->tp_info.dst_port)) {
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return PJ_SUCCESS;
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}
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ast_verbose("<--- Transmitting SIP %s (%d bytes) to %s:%s:%d --->\n%.*s\n",
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tdata->msg->type == PJSIP_REQUEST_MSG ? "request" : "response",
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(int) (tdata->buf.cur - tdata->buf.start),
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tdata->tp_info.transport->type_name,
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tdata->tp_info.dst_name,
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tdata->tp_info.dst_port,
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(int) (tdata->buf.end - tdata->buf.start), tdata->buf.start);
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return PJ_SUCCESS;
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}
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static pj_bool_t logging_on_rx_msg(pjsip_rx_data *rdata)
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{
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if (!pjsip_log_test_addr(rdata->pkt_info.src_name, rdata->pkt_info.src_port)) {
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return PJ_FALSE;
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}
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if (!rdata->msg_info.msg) {
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return PJ_FALSE;
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}
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ast_verbose("<--- Received SIP %s (%d bytes) from %s:%s:%d --->\n%s\n",
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rdata->msg_info.msg->type == PJSIP_REQUEST_MSG ? "request" : "response",
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rdata->msg_info.len,
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rdata->tp_info.transport->type_name,
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rdata->pkt_info.src_name,
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rdata->pkt_info.src_port,
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rdata->pkt_info.packet);
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return PJ_FALSE;
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}
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static pjsip_module logging_module = {
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.name = { "Logging Module", 14 },
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.priority = 0,
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.on_rx_request = logging_on_rx_msg,
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.on_rx_response = logging_on_rx_msg,
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.on_tx_request = logging_on_tx_msg,
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.on_tx_response = logging_on_tx_msg,
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};
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static char *pjsip_enable_logger_host(int fd, const char *arg)
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{
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if (ast_sockaddr_resolve_first_af(&log_addr, arg, 0, AST_AF_UNSPEC)) {
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return CLI_SHOWUSAGE;
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}
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ast_cli(fd, "PJSIP Logging Enabled for host: %s\n", ast_sockaddr_stringify_addr(&log_addr));
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logging_mode = LOGGING_MODE_ENABLED;
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return CLI_SUCCESS;
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}
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static char *pjsip_set_logger(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
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{
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const char *what;
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if (cmd == CLI_INIT) {
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e->command = "pjsip set logger {on|off|host}";
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e->usage =
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"Usage: pjsip set logger {on|off|host <name>}\n"
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" Enables or disabling logging of SIP packets\n"
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" read on ports bound to PJSIP transports either\n"
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" globally or enables logging for an individual\n"
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" host.\n";
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return NULL;
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} else if (cmd == CLI_GENERATE) {
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return NULL;
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}
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what = a->argv[e->args - 1]; /* Guaranteed to exist */
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if (a->argc == e->args) { /* on/off */
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if (!strcasecmp(what, "on")) {
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logging_mode = LOGGING_MODE_ENABLED;
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ast_cli(a->fd, "PJSIP Logging enabled\n");
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ast_sockaddr_setnull(&log_addr);
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return CLI_SUCCESS;
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} else if (!strcasecmp(what, "off")) {
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logging_mode = LOGGING_MODE_DISABLED;
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ast_cli(a->fd, "PJSIP Logging disabled\n");
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return CLI_SUCCESS;
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}
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} else if (a->argc == e->args + 1) {
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if (!strcasecmp(what, "host")) {
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return pjsip_enable_logger_host(a->fd, a->argv[e->args]);
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}
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}
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return CLI_SHOWUSAGE;
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}
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static struct ast_cli_entry cli_pjsip[] = {
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AST_CLI_DEFINE(pjsip_set_logger, "Enable/Disable PJSIP Logger Output")
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};
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static void check_debug(void)
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{
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RAII_VAR(char *, debug, ast_sip_get_debug(), ast_free);
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if (ast_false(debug)) {
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logging_mode = LOGGING_MODE_DISABLED;
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return;
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}
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logging_mode = LOGGING_MODE_ENABLED;
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if (ast_true(debug)) {
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ast_sockaddr_setnull(&log_addr);
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return;
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}
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/* assume host */
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if (ast_sockaddr_resolve_first_af(&log_addr, debug, 0, AST_AF_UNSPEC)) {
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ast_log(LOG_WARNING, "Could not resolve host %s for debug "
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"logging\n", debug);
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}
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}
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static void global_reloaded(const char *object_type)
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{
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check_debug();
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}
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static const struct ast_sorcery_observer global_observer = {
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.loaded = global_reloaded
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};
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static int load_module(void)
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{
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CHECK_PJSIP_MODULE_LOADED();
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if (ast_sorcery_observer_add(ast_sip_get_sorcery(), "global", &global_observer)) {
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ast_log(LOG_WARNING, "Unable to add global observer\n");
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return AST_MODULE_LOAD_DECLINE;
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}
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check_debug();
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ast_sip_register_service(&logging_module);
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ast_cli_register_multiple(cli_pjsip, ARRAY_LEN(cli_pjsip));
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return AST_MODULE_LOAD_SUCCESS;
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}
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static int unload_module(void)
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{
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ast_cli_unregister_multiple(cli_pjsip, ARRAY_LEN(cli_pjsip));
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ast_sip_unregister_service(&logging_module);
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ast_sorcery_observer_remove(
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ast_sip_get_sorcery(), "global", &global_observer);
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return 0;
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}
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AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "PJSIP Packet Logger",
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.support_level = AST_MODULE_SUPPORT_CORE,
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.load = load_module,
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.unload = unload_module,
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.load_pri = AST_MODPRI_APP_DEPEND,
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);
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