static int txfax_exec(struct ast_channel *chan, void *data)
{
int res = 0;
char source_file[256];
char *x;
char *s;
char *t;
char *v;
int option;
int len;
t30_state_t fax;
int calling_party;
int verbose;
int samples;
struct localuser *u;
struct ast_frame *inf = NULL;
struct ast_frame outf;
int original_read_fmt;
int original_write_fmt;
uint8_t __buf[sizeof(uint16_t)*MAX_BLOCK_SIZE + 2*AST_FRIENDLY_OFFSET];
uint8_t *buf = __buf + AST_FRIENDLY_OFFSET;
if (chan == NULL)
{
ast_log(LOG_WARNING, "Fax transmit channel is NULL. Giving up.\n");
return -1;
}
span_set_message_handler(span_message);
/* The next few lines of code parse out the filename and header from the input string */
if (data == NULL)
{
/* No data implies no filename or anything is present */
ast_log(LOG_WARNING, "Txfax requires an argument (filename)\n");
return -1;
}
calling_party = FALSE;
verbose = FALSE;
source_file[0] = '\0';
for (option = 0, v = s = data; v; option++, s++)
{
t = s;
v = strchr(s, '|');
s = (v) ? v : s + strlen(s);
strncpy((char *) buf, t, s - t);
buf[s - t] = '\0';
if (option == 0)
{
/* The first option is always the file name */
len = s - t;
if (len > 255)
len = 255;
strncpy(source_file, t, len);
source_file[len] = '\0';
}
else if (strncmp("caller", t, s - t) == 0)
{
calling_party = TRUE;
}
else if (strncmp("debug", t, s - t) == 0)
{
verbose = TRUE;
}
}
/* Done parsing */
LOCAL_USER_ADD(u);
if (chan->_state != AST_STATE_UP)
{
/* Shouldn't need this, but checking to see if channel is already answered
* Theoretically asterisk should already have answered before running the app */
res = ast_answer(chan);
}
if (!res)
{
original_read_fmt = chan->readformat;
if (original_read_fmt != AST_FORMAT_SLINEAR)
{
res = ast_set_read_format(chan, AST_FORMAT_SLINEAR);
if (res < 0)
{
ast_log(LOG_WARNING, "Unable to set to linear read mode, giving up\n");
return -1;
}
}
original_write_fmt = chan->writeformat;
if (original_write_fmt != AST_FORMAT_SLINEAR)
{
res = ast_set_write_format(chan, AST_FORMAT_SLINEAR);
if (res < 0)
{
ast_log(LOG_WARNING, "Unable to set to linear write mode, giving up\n");
res = ast_set_read_format(chan, original_read_fmt);
if (res)
ast_log(LOG_WARNING, "Unable to restore read format on '%s'\n", chan->name);
return -1;
}
}
fax_init(&fax, calling_party, NULL);
if (verbose)
fax.logging.level = SPAN_LOG_SHOW_SEVERITY | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_FLOW;
x = pbx_builtin_getvar_helper(chan, "LOCALSTATIONID");
if (x && x[0])
t30_set_local_ident(&fax, x);
x = pbx_builtin_getvar_helper(chan, "LOCALHEADERINFO");
if (x && x[0])
t30_set_header_info(&fax, x);
t30_set_tx_file(&fax, source_file, -1, -1);
//t30_set_phase_b_handler(&fax, phase_b_handler, chan);
//t30_set_phase_d_handler(&fax, phase_d_handler, chan);
t30_set_phase_e_handler(&fax, phase_e_handler, chan);
while (ast_waitfor(chan, -1) > -1)
{
inf = ast_read(chan);
if (inf == NULL)
{
res = -1;
break;
}
if (inf->frametype == AST_FRAME_VOICE)
{
if (fax_rx(&fax, inf->data, inf->samples))
break;
samples = (inf->samples <= MAX_BLOCK_SIZE) ? inf->samples : MAX_BLOCK_SIZE;
len = fax_tx(&fax, (int16_t *) &buf[AST_FRIENDLY_OFFSET], samples);
if (len)
{
memset(&outf, 0, sizeof(outf));
outf.frametype = AST_FRAME_VOICE;
outf.subclass = AST_FORMAT_SLINEAR;
outf.datalen = len*sizeof(int16_t);
outf.samples = len;
outf.data = &buf[AST_FRIENDLY_OFFSET];
outf.offset = AST_FRIENDLY_OFFSET;
if (ast_write(chan, &outf) < 0)
{
ast_log(LOG_WARNING, "Unable to write frame to channel; %s\n", strerror(errno));
break;
}
}
}
ast_frfree(inf);
}
if (inf == NULL)
{
ast_log(LOG_DEBUG, "Got hangup\n");
res = -1;
}
if (original_read_fmt && original_read_fmt != AST_FORMAT_SLINEAR)
{
res = ast_set_read_format(chan, original_read_fmt);
if (res)
ast_log(LOG_WARNING, "Unable to restore read format on '%s'\n", chan->name);
}
if (original_write_fmt && original_write_fmt != AST_FORMAT_SLINEAR)
{
res = ast_set_write_format(chan, original_write_fmt);
if (res)
ast_log(LOG_WARNING, "Unable to restore write format on '%s'\n", chan->name);
}
fax_release(&fax);
}
else
{
ast_log(LOG_WARNING, "Could not answer channel '%s'\n", chan->name);
}
LOCAL_USER_REMOVE(u);
return res;
}
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);
}
