static void ssh_loop_read(ssh_channel channel, FILE* fp, const guint32 count)
{
char line[SSH_READ_BLOCK_SIZE];
char chr;
unsigned offset = 0;
unsigned packet_size = 0;
guint8* packet;
time_t curtime = time(NULL);
int err;
guint64 bytes_written;
long unsigned packets = 0;
int status = CISCODUMP_PARSER_STARTING;
/* This is big enough to put on the heap */
packet = (guint8*)g_malloc(PACKET_MAX_SIZE);
do {
if (ssh_channel_read_timeout(channel, &chr, 1, FALSE, SSH_READ_TIMEOUT) == SSH_ERROR) {
g_warning("Error reading from channel");
g_free(packet);
return;
}
if (chr != '\n') {
line[offset] = chr;
offset++;
} else {
/* Parse the current line */
line[offset] = '\0';
status = parse_line(packet, &packet_size, line, status);
if (status == CISCODUMP_PARSER_END_PACKET) {
/* dump the packet to the pcap file */
if (!libpcap_write_packet(fp, curtime, (guint32)(curtime / 1000), packet_size,
packet_size, packet, &bytes_written, &err)) {
g_debug("Error in libpcap_write_packet(): %s", g_strerror(err));
break;
}
g_debug("Dumped packet %lu size: %u", packets, packet_size);
packet_size = 0;
status = CISCODUMP_PARSER_STARTING;
packets++;
}
offset = 0;
}
} while(packets < count);
g_free(packet);
}
/* Read bytes from the channel. If bytes == -1, read all data (until timeout). If outbuf != NULL, data are stored there */
static int read_output_bytes(ssh_channel channel, int bytes, char* outbuf)
{
char chr;
int total;
int bytes_read;
total = (bytes > 0 ? bytes : G_MAXINT);
bytes_read = 0;
while(ssh_channel_read_timeout(channel, &chr, 1, 0, 2000) > 0 && bytes_read < total) {
g_debug("%c", chr);
if (chr == '^')
return EXIT_FAILURE;
if (outbuf)
outbuf[bytes_read] = chr;
bytes_read++;
}
return EXIT_SUCCESS;
}
static void *nogvl_read(void *ptr) {
struct nogvl_read_args *args = ptr;
args->rc = ssh_channel_read_timeout(args->channel, args->buf, args->count,
args->is_stderr, args->timeout);
return NULL;
}
