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freeswitch/scripts/c/socket2me/socket2me.c

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/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* * Neither the name of [original copyright holder] nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*
* Copyright (C) 2007, Anthony Minessale II <anthmct@yahoo.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <sys/wait.h>
#include <string.h>
#include <unistd.h>
#include <spandsp.h>
#define SOCKET2ME_DEBUG 0
#define MAXPENDING 10000
#define RCVBUFSIZE 4198
#define PORT_MIN 9000
#define PORT_MAX 10000
static int use_port = PORT_MIN;
static void phase_b_handler(t30_state_t *s, void *user_data, int result)
{
int session;
session = (intptr_t) user_data;
printf("Phase B handler on session %d - (0x%X) %s\n", session, result, t30_frametype(result));
}
static void phase_d_handler(t30_state_t *s, void *user_data, int result)
{
int session;
char ident[21];
t30_stats_t t;
session = (intptr_t) user_data;
printf("Phase D handler on session %d - (0x%X) %s\n", session, result, t30_frametype(result));
t30_get_transfer_statistics(s, &t);
printf( "Phase D: bit rate %d\n", t.bit_rate);
printf( "Phase D: ECM %s\n", (t.error_correcting_mode) ? "on" : "off");
printf( "Phase D: pages transferred %d\n", t.pages_transferred);
printf( "Phase D: image size %d x %d\n", t.width, t.length);
printf( "Phase D: image resolution %d x %d\n", t.x_resolution, t.y_resolution);
printf( "Phase D: bad rows %d\n", t.bad_rows);
printf( "Phase D: longest bad row run %d\n", t.longest_bad_row_run);
printf( "Phase D: compression type %d\n", t.encoding);
printf( "Phase D: image size %d\n", t.image_size);
t30_get_local_ident(s, ident);
printf( "Phase D: local ident '%s'\n", ident);
t30_get_far_ident(s, ident);
printf( "Phase D: remote ident '%s'\n", ident);
}
static void phase_e_handler(t30_state_t *s, void *user_data, int result)
{
int session;
t30_stats_t t;
const char *u;
char ident[21];
session = (intptr_t) user_data;
printf("Phase E handler on session %d - (%d) %s\n", session, result, t30_completion_code_to_str(result));
t30_get_transfer_statistics(s, &t);
printf( "Phase E: bit rate %d\n", t.bit_rate);
printf( "Phase E: ECM %s\n", (t.error_correcting_mode) ? "on" : "off");
printf( "Phase E: pages transferred %d\n", t.pages_transferred);
printf( "Phase E: image size %d x %d\n", t.width, t.length);
printf( "Phase E: image resolution %d x %d\n", t.x_resolution, t.y_resolution);
printf( "Phase E: bad rows %d\n", t.bad_rows);
printf( "Phase E: longest bad row run %d\n", t.longest_bad_row_run);
printf( "Phase E: coding method %s\n", t4_encoding_to_str(t.encoding));
printf( "Phase E: image size %d bytes\n", t.image_size);
t30_get_local_ident(s, ident);
printf( "Phase E: local ident '%s'\n", ident);
t30_get_far_ident(s, ident);
printf( "Phase E: remote ident '%s'\n", ident);
if ((u = t30_get_far_country(s)))
printf( "Phase E: Remote was made in '%s'\n", u);
if ((u = t30_get_far_vendor(s)))
printf( "Phase E: Remote was made by '%s'\n", u);
if ((u = t30_get_far_model(s)))
printf( "Phase E: Remote is model '%s'\n", u);
}
static int document_handler(t30_state_t *s, void *user_data, int event)
{
int session;
session = (intptr_t) user_data;
printf("Document handler on session %d - event %d\n", session, event);
return FALSE;
}
void die(char *error_str)
{
perror(error_str);
exit(1);
}
static void set_vars(char *data)
{
char *start, *end, *p=malloc(strlen(data)+1);
char name[8192],value[8192];
if(!p) {
perror("malloc");
exit(1);
}
memcpy(p,data,strlen(data)+1);
start=p;
while(start != 0 && *start != '\0') {
if(end = strchr(start,'\r')) {
*end = '\0';
if(*(end + 1) == '\n') {
end+=2;
} else {
end++;
}
} else {
return;
}
sscanf(start,"%s: %s",name,value);
setenv(name,value,1);
start = end;
}
free(p);
}
static int cheezy_get_var(char *data, char *name, char *buf, size_t buflen)
{
char *p=data;
/* the old way didnt make sure that variable values were used for the name hunt
* and didnt ensure that only a full match of the variable name was used
*/
do {
if(!strncmp(p,name,strlen(name)) && *(p+strlen(name))==':') break;
} while((p = (strstr(p,"\n")+1))!=(char *)1);
if (p != (char *)1 && *p!='\0') {
char *v, *e;
if ((v = strchr(p, ':'))) {
v++;
while(v && *v == ' ') {
v++;
}
if (v) {
if (!(e = strchr(v, '\r'))) {
e = strchr(v, '\n');
}
}
if (v && e) {
int cplen;
int len = e - v;
if (len > buflen - 1) {
cplen = buflen -1;
} else {
cplen = len;
}
strncpy(buf, v, cplen);
*(buf+cplen) = '\0';
return 1;
}
}
}
return 0;
}
void client_run(int client_socket, char *local_ip, int local_port, char *remote_ip, int remote_port)
{
char sendbuf[RCVBUFSIZE], recvbuf[RCVBUFSIZE], infobuf[RCVBUFSIZE];
struct sockaddr_in addr = {0}, sendaddr = {0};
int read_bytes;
int usock;
int reuse_addr = 1;
fax_state_t fax;
char tmp[512], fn[512], *file_name = "/tmp/test.tiff";
int send_fax = FALSE;
int g711 = 0;
int pcmu = 0;
snprintf(sendbuf, sizeof(sendbuf), "connect\n\n");
send(client_socket, sendbuf, strlen(sendbuf), 0);
if ((read_bytes = recv(client_socket, infobuf, sizeof(infobuf), 0)) < 0) {
die("recv() failed");
}
#if SOCKET2ME_DEBUG
printf("READ [%s]\n", infobuf);
#endif
if (cheezy_get_var(infobuf, "Channel-Read-Codec-Name", tmp, sizeof(tmp))) {
if (!strcasecmp(tmp, "pcmu")) {
g711 = 1;
pcmu = 1;
} else if (!strcasecmp(tmp, "pcma")) {
g711 = 1;
}
}
snprintf(sendbuf, sizeof(sendbuf), "sendmsg\n"
"call-command: unicast\n"
"local-ip: %s\n"
"local-port: %d\n"
"remote-ip: %s\n"
"remote-port: %d\n"
"transport: udp\n"
"%s"
"\n",
local_ip, local_port,
remote_ip, remote_port,
g711 ? "flags: native\n" : ""
);
if (cheezy_get_var(infobuf, "variable_fax_file_name", fn, sizeof(fn))) {
file_name = fn;
}
if (cheezy_get_var(infobuf, "variable_fax_mode", tmp, sizeof(tmp))) {
if (!strcasecmp(tmp, "send")) {
send_fax = TRUE;
}
}
if (cheezy_get_var(infobuf, "variable_fax_preexec", tmp, sizeof(tmp))) {
set_vars(infobuf);
system(tmp);
}
#if SOCKET2ME_DEBUG
printf("SEND: [%s]\n", sendbuf);
#endif
send(client_socket, sendbuf, strlen(sendbuf), 0);
memset(recvbuf, 0, sizeof(recvbuf));
if ((read_bytes = recv(client_socket, recvbuf, sizeof(recvbuf), 0)) < 0) {
die("recv() failed");
}
#if SOCKET2ME_DEBUG
printf("READ [%s]\n", recvbuf);
#endif
if ((usock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
die("socket() failed");
}
setsockopt(usock, SOL_SOCKET, SO_REUSEADDR, &reuse_addr, sizeof(reuse_addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_ANY);
/*addr.sin_addr.s_addr = inet_addr(remote_ip);*/
addr.sin_port = htons(remote_port);
sendaddr.sin_family = AF_INET;
sendaddr.sin_addr.s_addr = inet_addr(local_ip);
sendaddr.sin_port = htons(local_port);
if (bind(usock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
die("bind() failed");
}
printf("%s Fax filename: [%s] from %s:%d -> %s:%d\n", send_fax ? "Sending" : "Receiving", file_name, local_ip, local_port, remote_ip, remote_port);
fax_init(&fax, send_fax);
t30_set_local_ident(&fax.t30_state, "Socket 2 ME");
t30_set_header_info(&fax.t30_state, "Socket 2 ME");
if (send_fax) {
t30_set_tx_file(&fax.t30_state, file_name, -1, -1);
} else {
t30_set_rx_file(&fax.t30_state, file_name, -1);
}
t30_set_phase_b_handler(&fax.t30_state, phase_b_handler, NULL);
t30_set_phase_d_handler(&fax.t30_state, phase_d_handler, NULL);
t30_set_phase_e_handler(&fax.t30_state, phase_e_handler, NULL);
t30_set_document_handler(&fax.t30_state, document_handler, NULL);
t30_set_ecm_capability(&fax.t30_state, TRUE);
t30_set_supported_compressions(&fax.t30_state, T30_SUPPORT_T4_1D_COMPRESSION | T30_SUPPORT_T4_2D_COMPRESSION | T30_SUPPORT_T6_COMPRESSION);
t30_set_supported_image_sizes(&fax.t30_state, T30_SUPPORT_US_LETTER_LENGTH | T30_SUPPORT_US_LEGAL_LENGTH | T30_SUPPORT_UNLIMITED_LENGTH
| T30_SUPPORT_215MM_WIDTH | T30_SUPPORT_255MM_WIDTH | T30_SUPPORT_303MM_WIDTH);
t30_set_supported_resolutions(&fax.t30_state, T30_SUPPORT_STANDARD_RESOLUTION | T30_SUPPORT_FINE_RESOLUTION | T30_SUPPORT_SUPERFINE_RESOLUTION
| T30_SUPPORT_R8_RESOLUTION | T30_SUPPORT_R16_RESOLUTION);
for (;;) {
struct sockaddr_in local_addr = {0};
size_t cliAddrLen = sizeof(local_addr);
unsigned char audiobuf[1024], rawbuf[1024], outbuf[1024];
short *usebuf = NULL;
int tx, tx_bytes, bigger, sample_count;
fd_set ready;
FD_ZERO(&ready);
FD_SET(usock, &ready);
FD_SET(client_socket, &ready);
bigger = usock > client_socket ? usock : client_socket;
select(++bigger, &ready, NULL, NULL, NULL);
if (FD_ISSET(client_socket, &ready)) {
memset(recvbuf, 0, sizeof(recvbuf));
if ((read_bytes = recv(client_socket, recvbuf, sizeof(recvbuf), 0)) < 0) {
die("recv() failed");
}
if (read_bytes == 0) {
break;
}
#if SOCKET2ME_DEBUG
printf("READ [%s]\n", recvbuf);
#endif
}
if (!FD_ISSET(usock, &ready)) {
continue;
}
if ((read_bytes = recvfrom(usock, audiobuf, sizeof(audiobuf), 0, (struct sockaddr *) &local_addr, &cliAddrLen)) < 0) {
die("recvfrom() failed");
}
if (g711) {
int i;
short *rp = (short *) rawbuf;
for (i = 0; i < read_bytes; i++) {
if (pcmu) {
rp[i] = ulaw_to_linear(audiobuf[i]);
} else {
rp[i] = alaw_to_linear(audiobuf[i]);
}
}
usebuf = rp;
sample_count = read_bytes;
} else {
usebuf = (short *) audiobuf;
sample_count = read_bytes / 2;
}
fax_rx(&fax, usebuf, sample_count);
#if SOCKET2ME_DEBUG
printf("Handling client %s:%d %d bytes\n", inet_ntoa(local_addr.sin_addr), ntohs(local_addr.sin_port), read_bytes);
#endif
if ((tx = fax_tx(&fax, (short *)outbuf, sample_count)) < 0) {
printf("Fax Error\n");
break;
} else if (!tx) {
continue;
}
if (g711) {
int i;
short *bp = (short *) outbuf;
for (i = 0; i < tx; i++) {
if (pcmu) {
rawbuf[i] = linear_to_ulaw(bp[i]);
} else {
rawbuf[i] = linear_to_alaw(bp[i]);
}
}
usebuf = (short *) rawbuf;
tx_bytes = tx;
} else {
usebuf = (short *)outbuf;
tx_bytes = tx * 2;
}
cliAddrLen = sizeof(sendaddr);
if (sendto(usock, usebuf, tx_bytes, 0, (struct sockaddr *) &sendaddr, sizeof(sendaddr)) != tx_bytes) {
die("sendto() sent a different number of bytes than expected");
}
}
close(client_socket);
close(usock);
t30_terminate(&fax.t30_state);
fax_release(&fax);
if (cheezy_get_var(infobuf, "variable_fax_postexec", tmp, sizeof(tmp))) {
set_vars(infobuf);
system(tmp);
}
printf("Done\n");
snprintf(sendbuf, sizeof(sendbuf), "hangup\n\n");
send(client_socket, sendbuf, strlen(sendbuf), 0);
}
int client_accept(int servSock)
{
int client_sock;
struct sockaddr_in echoClntAddr;
unsigned int clntLen;
clntLen = sizeof(echoClntAddr);
if ((client_sock = accept(servSock, (struct sockaddr *) &echoClntAddr, &clntLen)) < 0) {
die("accept() failed");
}
printf("Client Connect: [%s]\n", inet_ntoa(echoClntAddr.sin_addr));
return client_sock;
}
int main(int argc, char *argv[])
{
int servSock, client_sock;
int port = 8084;
struct sockaddr_in addr;
pid_t pid;
unsigned int process_count = 0;
int reuse_addr = 1;
char *local_ip = NULL;
char *remote_ip = NULL;
char *signal_port_name = NULL;
if (argc > 0) {
local_ip = argv[1];
}
if (argc > 1) {
remote_ip = argv[2];
}
if (argc > 2) {
signal_port_name = argv[3];
}
if (!local_ip) {
local_ip = "127.0.0.1";
}
if (!remote_ip) {
remote_ip = "127.0.0.1";
}
if (signal_port_name) {
port = atoi(signal_port_name);
}
if ((servSock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
die("Socket Error!\n");
}
setsockopt(servSock, SOL_SOCKET, SO_REUSEADDR, &reuse_addr, sizeof(reuse_addr));
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_ANY);
addr.sin_port = htons(port);
if (bind(servSock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
die("Bind Error!\n");
return -1;
}
if (listen(servSock, MAXPENDING) < 0) {
die("Listen error\n");
return -1;
}
for (;;) {
int local_port = use_port++;
int remote_port = use_port++;
if (use_port++ >= PORT_MAX) {
use_port = PORT_MIN;
}
client_sock = client_accept(servSock);
if ((pid = fork()) < 0) {
die("fork() failed");
} else if (pid == 0) {
close(servSock);
client_run(client_sock, local_ip, local_port, remote_ip, remote_port);
exit(0);
}
#if SOCKET2ME_DEBUG
printf("with child process: %d\n", (int) pid);
#endif
close(client_sock);
process_count++;
while (process_count) {
pid = waitpid((pid_t) -1, NULL, WNOHANG);
if (pid < 0) {
die("waitpid() failed");
} else if (pid == 0) {
break;
} else {
process_count--;
}
}
}
}
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