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/*
* (C) 2012 by Pablo Neira Ayuso <pablo@gnumonks.org>
* (C) 2012 by On Waves ehf <http://www.on-waves.com>
*
* This program 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.
*/
#include <stdio.h>
#include <pcap.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <string.h>
#include <dlfcn.h>
#include <unistd.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/timer.h>
#include <osmocom/core/select.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/application.h>
#include <osmocom/core/talloc.h>
#include <osmocom/netif/rtp.h>
#include <osmocom/netif/osmux.h>
#include "osmo_pcap.h"
/*
* This is the output handle for osmux, it stores last RTP sequence and
* timestamp that has been used. There should be one per circuit ID.
*/
static struct osmux_out_handle h_output;
static void tx_cb(struct msgb *msg, void *data)
{
printf("now sending message scheduled [emulated], msg=%p\n", msg);
/*
* Here we should call the real function that sends the message
* instead of releasing it.
*/
msgb_free(msg);
}
static void deliver(struct msgb *batch_msg)
{
struct osmux_hdr *osmuxh;
struct llist_head list;
printf("sending batch (len=%d) [emulated]\n", batch_msg->len);
/* This code below belongs to the osmux receiver */
while((osmuxh = osmux_xfrm_output_pull(batch_msg)) != NULL) {
osmux_xfrm_output(osmuxh, &h_output, &list);
osmux_tx_sched(&list, tx_cb, NULL);
}
msgb_free(batch_msg);
}
/*
* This is the input handle for osmux. It stores the last osmux sequence that
* has been used and the deliver function that sends the osmux batch.
*/
struct osmux_in_handle h_input = {
.osmux_seq = 0, /* sequence number to start OSmux message from */
.batch_factor = 4, /* batch up to 4 RTP messages */
.deliver = deliver,
};
#define MAX_CONCURRENT_CALLS 8
static int ccid[MAX_CONCURRENT_CALLS];
static void register_ccid(uint32_t ssrc)
{
int i, found = 0;
for (i=0; i<MAX_CONCURRENT_CALLS; i++) {
if (ccid[i] == ssrc)
continue;
if (ccid[i] < 0) {
found = 1;
break;
}
}
if (found) {
ccid[i] = ssrc;
LOGP(DOSMUXTEST, LOGL_DEBUG, "mapping ssrc=%u to ccid=%d\n",
ntohl(ssrc), i);
} else {
LOGP(DOSMUXTEST, LOGL_ERROR, "cannot map ssrc to ccid!\n");
}
}
static int get_ccid(uint32_t ssrc)
{
int i, found = 0;
for (i=0; i<MAX_CONCURRENT_CALLS; i++) {
if (ccid[i] == ssrc) {
found = 1;
break;
}
}
return found ? i : -1;
}
static int pcap_test_run(struct msgb *msg)
{
int ret, ccid;
struct rtp_hdr *rtph;
rtph = osmo_rtp_get_hdr(msg);
if (rtph == NULL)
return 0;
ccid = get_ccid(&h_input, rtph->ssrc);
if (ccid < 0)
register_ccid(&h_input, rtph->ssrc);
while ((ret = osmux_xfrm_input(&h_input, msg, ccid)) > 1) {
/* batch full, deliver it */
osmux_xfrm_input_deliver(&h_input);
}
if (ret == -1)
printf("something is wrong\n");
return 0;
}
static struct osmo_pcap osmo_pcap;
static void osmo_pcap_pkt_timer_cb(void *data)
{
if (osmo_pcap_test_run(&osmo_pcap, IPPROTO_UDP, pcap_test_run) < 0) {
osmo_pcap_stats_printf();
printf("\e[1;34mDone.\e[0m\n");
osmo_pcap_test_close(osmo_pcap.h);
exit(EXIT_SUCCESS);
}
}
#define DOSMUXTEST 0
struct log_info_cat osmux_test_cat[] = {
[DOSMUXTEST] = {
.name = "DOSMUXTEST",
.description = "osmux test",
.color = "\033[1;35m",
.enabled = 1, .loglevel = LOGL_NOTICE,
},
};
const struct log_info osmux_log_info = {
.filter_fn = NULL,
.cat = osmux_test_cat,
.num_cat = ARRAY_SIZE(osmux_test_cat),
};
static void *tall_test;
int main(int argc, char *argv[])
{
int ret;
if (argc != 2) {
fprintf(stderr, "Wrong usage:\n");
fprintf(stderr, "%s <pcap_file>\n", argv[0]);
fprintf(stderr, "example: %s file.pcap\n", argv[0]);
exit(EXIT_FAILURE);
}
tall_test = talloc_named_const(NULL, 1, "osmux_pcap_test");
osmo_init_logging(&osmux_log_info);
log_set_log_level(osmo_stderr_target, LOGL_DEBUG);
osmo_pcap_init();
printf("\e[1;34mStarting test...\e[0m\n");
osmo_pcap.h = osmo_pcap_test_open(argv[1]);
if (osmo_pcap.h == NULL)
exit(EXIT_FAILURE);
osmo_pcap.timer.cb = osmo_pcap_pkt_timer_cb;
osmux_xfrm_input_init(&h_input);
osmux_xfrm_output_init(&h_output);
/* first run */
osmo_pcap_pkt_timer_cb(NULL);
while(1) {
osmo_select_main(0);
}
return ret;
}
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