static int
tc_device_set(tc_event_loop_t *event_loop, device_t *device)
{
int fd;
tc_event_t *ev;
fd = tc_pcap_socket_in_init(&(device->pcap), device->name,
REP_RCV_BUF_SIZE, TC_PCAP_BUF_SIZE, srv_settings.filter);
if (fd == TC_INVALID_SOCK) {
return TC_ERR;
}
pcap_map[fd] = device->pcap;
ev = tc_event_create(event_loop->pool, fd, tc_proc_resp_packet, NULL);
if (ev == NULL) {
return TC_ERR;
}
ev->low_prior = 1;
if (tc_event_add(event_loop, ev, TC_EVENT_READ) == TC_EVENT_ERROR) {
tc_log_info(LOG_ERR, 0, "add socket(%d) to event loop failed.", fd);
return TC_ERR;
}
return TC_OK;
}
static int
tc_msg_event_accept(tc_event_t *rev)
{
int fd;
tc_event_t *ev;
if ((fd = tc_socket_accept(rev->fd)) == TC_INVALID_SOCKET) {
tc_log_info(LOG_ERR, 0, "msg accept failed, from listen:%d", rev->fd);
return TC_ERROR;
}
if (tc_socket_set_nodelay(fd) == TC_ERROR) {
tc_log_info(LOG_ERR, 0, "Set no delay to socket(%d) failed.", rev->fd);
return TC_ERROR;
}
ev = tc_event_create(fd, tc_msg_event_process, NULL);
if (ev == NULL) {
tc_log_info(LOG_ERR, 0, "Msg event create failed.");
return TC_ERROR;
}
if (tc_event_add(rev->loop, ev, TC_EVENT_READ) == TC_EVENT_ERROR) {
return TC_ERROR;
}
return TC_OK;
}
static int
tc_device_set(tc_event_loop_t *event_loop, device_t *device)
{
int fd;
tc_event_t *ev;
fd = tc_pcap_socket_in_init(&(device->pcap), device->name,
PCAP_RECV_BUF_SIZE, TCPCOPY_PCAP_BUF_SIZE, clt_settings.filter);
if (fd == TC_INVALID_SOCKET) {
return TC_ERROR;
}
pcap_map[fd] = device->pcap;
ev = tc_event_create(fd, tc_process_pcap_socket_packet, NULL);
if (ev == NULL) {
return TC_ERROR;
}
if (tc_event_add(event_loop, ev, TC_EVENT_READ) == TC_EVENT_ERROR) {
tc_log_info(LOG_ERR, 0, "add socket(%d) to event loop failed.", fd);
return TC_ERROR;
}
return TC_OK;
}
static int
tc_msg_event_accept(tc_event_t *rev)
{
int fd;
tc_event_t *ev;
if ((fd = tc_socket_accept(rev->fd)) == TC_INVALID_SOCKET) {
tc_log_info(LOG_ERR, 0, "msg accept failed, from listen:%d", rev->fd);
return TC_ERROR;
}
if (tc_socket_set_nodelay(fd) == TC_ERROR) {
tc_log_info(LOG_ERR, 0, "Set no delay to socket(%d) failed.", rev->fd);
return TC_ERROR;
}
ev = tc_event_create(fd, tc_msg_event_process, NULL);
if (ev == NULL) {
tc_log_info(LOG_ERR, 0, "msg event create failed.");
return TC_ERROR;
}
if (tc_event_add(rev->loop, ev, TC_EVENT_READ) == TC_EVENT_ERROR) {
return TC_ERROR;
}
#if (TCPCOPY_SINGLE)
if (srv_settings.router_fd > 0) {
tc_log_info(LOG_WARN, 0, "it does not support distributed tcpcopy");
}
srv_settings.router_fd = fd;
#endif
return TC_OK;
}
static int
tc_msg_event_accept(tc_event_t *rev)
{
tc_event_t *ev;
register int fd;
tunnel_basic_t *tunnel;
if ((fd = tc_socket_accept(rev->fd)) == TC_INVALID_SOCK) {
tc_log_info(LOG_ERR, 0, "msg accept failed, from listen:%d", rev->fd);
return TC_ERR;
}
tc_log_info(LOG_NOTICE, 0, "it adds fd:%d", fd);
if (tc_socket_set_nodelay(fd) == TC_ERR) {
tc_log_info(LOG_ERR, 0, "Set no delay to socket(%d) failed.", rev->fd);
tc_log_info(LOG_NOTICE, 0, "it close socket:%d", fd);
tc_socket_close(fd);
return TC_ERR;
}
#if (TC_SINGLE)
if (!tc_intercept_check_tunnel_for_single(fd)) {
tc_log_info(LOG_WARN, 0, "sth tries to connect to server.");
tc_log_info(LOG_NOTICE, 0, "it close socket:%d", fd);
tc_socket_close(fd);
return TC_ERR;
}
#endif
ev = tc_event_create(rev->loop->pool, fd, tc_msg_event_proc, NULL);
if (ev == NULL) {
tc_log_info(LOG_ERR, 0, "Msg event create failed.");
return TC_ERR;
}
if (tc_event_add(rev->loop, ev, TC_EVENT_READ) == TC_EVENT_ERROR) {
return TC_ERR;
}
tunnel = srv_settings.tunnel;
tunnel[fd].ev = ev;
tunnel[fd].first_in = 1;
tunnel[fd].fd_valid = 1;
return TC_OK;
}
int
tc_message_init(tc_event_loop_t *event_loop, uint32_t ip, uint16_t port)
{
int fd;
tc_event_t *ev;
#if (TCPCOPY_DR)
socklen_t len;
struct timeval timeout = {3,0};
#endif
if ((fd = tc_socket_init()) == TC_INVALID_SOCKET) {
return TC_INVALID_SOCKET;
}
if (tc_socket_connect(fd, ip, port) == TC_ERROR) {
return TC_INVALID_SOCKET;
}
if (tc_socket_set_nodelay(fd) == TC_ERROR) {
return TC_INVALID_SOCKET;
}
#if (TCPCOPY_COMBINED)
if (tc_socket_set_nonblocking(fd) == TC_ERROR) {
return TC_INVALID_SOCKET;
}
#endif
#if (TCPCOPY_DR)
len = (socklen_t) sizeof(struct timeval);
setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, (char *)&timeout, len);
#endif
ev = tc_event_create(fd, tc_process_server_msg, NULL);
if (ev == NULL) {
return TC_INVALID_SOCKET;
}
if (tc_event_add(event_loop, ev, TC_EVENT_READ) == TC_EVENT_ERROR) {
return TC_INVALID_SOCKET;
}
return fd;
}
/* initiate for tcpcopy server */
int
interception_init(tc_event_loop_t *event_loop, char *ip, uint16_t port)
{
int fd;
tc_event_t *ev;
delay_table_init(srv_settings.hash_size);
if (router_init() != TC_OK) {
return TC_ERROR;
}
/* init the listening socket */
if ((fd = tc_socket_init()) == TC_INVALID_SOCKET) {
return TC_ERROR;
} else {
if (tc_socket_listen(fd, ip, port) == TC_ERROR) {
return TC_ERROR;
}
tc_log_info(LOG_NOTICE, 0, "msg listen socket:%d", fd);
ev = tc_event_create(fd, tc_msg_event_accept, NULL);
if (ev == NULL) {
return TC_ERROR;
}
if (tc_event_add(event_loop, ev, TC_EVENT_READ) == TC_EVENT_ERROR) {
return TC_ERROR;
}
}
if (sniff_init(event_loop) != TC_OK) {
return TC_ERROR;
}
return TC_OK;
}
/* This is for copying multiple ports */
int
address_add_msg_conn(tc_event_loop_t *event_loop, uint16_t local_port,
uint32_t dst_ip, uint16_t dst_port)
{
int fd;
tc_event_t *msg_socket_event;
if ((fd = tc_socket_init()) == TC_INVALID_SOCKET) {
return TC_ERROR;
}
if (tc_socket_connect(fd, dst_ip, dst_port) == TC_ERROR) {
return TC_ERROR;
}
if (tc_socket_set_nodelay(fd) == TC_ERROR) {
return TC_ERROR;
}
msg_socket_event = tc_event_create(fd, dispose_event_wrapper, NULL);
if (msg_socket_event == NULL) {
return TC_ERROR;
}
if (tc_event_add(event_loop, msg_socket_event, TC_EVENT_READ)
== TC_EVENT_ERROR)
{
return TC_ERROR;
}
addr[local_port].ip = dst_ip;
addr[local_port].port = dst_port;
addr[local_port].sock = fd;
return TC_OK;
}
int
tc_packets_init(tc_event_loop_t *event_loop)
{
int fd;
#if (TCPCOPY_PCAP)
int i = 0;
bool work;
char ebuf[PCAP_ERRBUF_SIZE];
devices_t *devices;
pcap_if_t *alldevs, *d;
#else
tc_event_t *ev;
#endif
/* init the raw socket to send packets */
if ((fd = tc_raw_socket_out_init()) == TC_INVALID_SOCKET) {
return TC_ERROR;
} else {
tc_raw_socket_out = fd;
}
#if (TCPCOPY_PCAP)
devices = &(clt_settings.devices);
if (clt_settings.raw_device == NULL) {
if (pcap_findalldevs(&alldevs, ebuf) == -1) {
tc_log_info(LOG_ERR, 0, "error in pcap_findalldevs:%s", ebuf);
return TC_ERROR;
}
for (d = alldevs; d; d = d->next)
{
if (strcmp(d->name, DEFAULT_DEVICE) == 0) {
continue;
}
if (i >= MAX_DEVICE_NUM) {
tc_log_info(LOG_ERR, 0, "It has too many devices");
return TC_ERROR;
}
strcpy(devices->device[i++].name, d->name);
}
devices->device_num = i;
}
for (i = 0; i < devices->device_num; i++) {
if (tc_device_set(event_loop, &(devices->device[i]))
== TC_ERROR)
{
tc_log_info(LOG_WARN, 0, "device could not work:%s", d->name);
} else {
work = true;
}
}
if (work == false) {
tc_log_info(LOG_ERR, 0, "no device available for snooping packets");
return TC_ERROR;
}
#else
/* init the raw socket to recv packets */
if ((fd = tc_raw_socket_in_init()) == TC_INVALID_SOCKET) {
return TC_ERROR;
}
tc_socket_set_nonblocking(fd);
ev = tc_event_create(fd, tc_process_raw_socket_packet, NULL);
if (ev == NULL) {
return TC_ERROR;
}
if (tc_event_add(event_loop, ev, TC_EVENT_READ) == TC_EVENT_ERROR) {
tc_log_info(LOG_ERR, 0, "add socket(%d) to event loop failed.", fd);
return TC_ERROR;
}
#endif
return TC_OK;
}
/* initiate for tcpcopy server */
int
interception_init(tc_event_loop_t *event_loop, char *ip, uint16_t port)
{
int fd;
#if (INTERCEPT_THREAD)
pthread_t thread;
#endif
tc_event_t *ev;
router_init(srv_settings.hash_size);
pid = getpid();
/* init the listening socket */
if ((fd = tc_socket_init()) == TC_INVALID_SOCKET) {
return TC_ERROR;
} else {
if (tc_socket_listen(fd, ip, port) == TC_ERROR) {
return TC_ERROR;
}
tc_log_info(LOG_NOTICE, 0, "msg listen socket:%d", fd);
ev = tc_event_create(fd, tc_msg_event_accept, NULL);
if (ev == NULL) {
return TC_ERROR;
}
if (tc_event_add(event_loop, ev, TC_EVENT_READ) == TC_EVENT_ERROR) {
return TC_ERROR;
}
}
/* init the netlink socket */
if ((fd = tc_nl_socket_init()) == TC_INVALID_SOCKET) {
return TC_ERROR;
} else {
tc_log_info(LOG_NOTICE, 0, "firewall socket:%d", fd);
ev = tc_event_create(fd, tc_nl_event_process, NULL);
if (ev == NULL) {
return TC_ERROR;
}
if (tc_event_add(event_loop, ev, TC_EVENT_READ) == TC_EVENT_ERROR) {
return TC_ERROR;
}
}
#if (INTERCEPT_THREAD)
pthread_mutex_init(&mutex, NULL);
pthread_cond_init(&full, NULL);
pthread_cond_init(&empty, NULL);
pthread_create(&thread, NULL, interception_process_msg, NULL);
pthread_mutex_init(&nl_mutex, NULL);
pthread_cond_init(&nl_full, NULL);
pthread_cond_init(&nl_empty, NULL);
pthread_create(&thread, NULL, interception_dispose_nl_verdict, NULL);
#endif
return TC_OK;
}
/* initiate for tcpcopy server */
int
interception_init(tc_event_loop_t *event_loop, char *ip, uint16_t port)
{
int fd;
tc_event_t *ev;
#if (!TCPCOPY_SINGLE)
delay_table_init(srv_settings.hash_size);
if (router_init() != TC_OK) {
return TC_ERROR;
}
#endif
pid = getpid();
/* init the listening socket */
if ((fd = tc_socket_init()) == TC_INVALID_SOCKET) {
return TC_ERROR;
} else {
if (tc_socket_listen(fd, ip, port) == TC_ERROR) {
return TC_ERROR;
}
tc_log_info(LOG_NOTICE, 0, "msg listen socket:%d", fd);
ev = tc_event_create(fd, tc_msg_event_accept, NULL);
if (ev == NULL) {
return TC_ERROR;
}
if (tc_event_add(event_loop, ev, TC_EVENT_READ) == TC_EVENT_ERROR) {
return TC_ERROR;
}
}
#if (INTERCEPT_NFQUEUE)
/* init the nfq socket */
if ((fd = tc_nfq_socket_init(&srv_settings.nfq_handler,
&srv_settings.nfq_q_handler, tc_nfq_process_packet))
== TC_INVALID_SOCKET)
{
return TC_ERROR;
} else {
tc_log_info(LOG_NOTICE, 0, "nfq socket:%d", fd);
ev = tc_event_create(fd, tc_nfq_event_process, NULL);
if (ev == NULL) {
return TC_ERROR;
}
if (tc_event_add(event_loop, ev, TC_EVENT_READ) == TC_EVENT_ERROR) {
return TC_ERROR;
}
}
#else
/* init the netlink socket */
if ((fd = tc_nl_socket_init()) == TC_INVALID_SOCKET) {
return TC_ERROR;
} else {
tc_log_info(LOG_NOTICE, 0, "firewall socket:%d", fd);
ev = tc_event_create(fd, tc_nl_event_process, NULL);
if (ev == NULL) {
return TC_ERROR;
}
if (tc_event_add(event_loop, ev, TC_EVENT_READ) == TC_EVENT_ERROR) {
return TC_ERROR;
}
}
#endif
return TC_OK;
}
/* Initiate udpcopy client */
int udp_copy_init(tc_event_loop_t *event_loop)
{
#if (UDPCOPY_OFFLINE)
char *pcap_file, ebuf[PCAP_ERRBUF_SIZE];
#endif
tc_event_t *raw_socket_event;
/* keep it temporarily */
select_server_set_callback(dispose_event);
localhost = inet_addr("127.0.0.1");
/* Init output raw socket info */
send_init();
#if (!UDPCOPY_OFFLINE)
/* Init input raw socket info */
raw_sock = init_input_raw_socket();
#endif
if (raw_sock != -1){
/* Add the input raw socket to select */
raw_socket_event = tc_event_create(raw_sock, dispose_event_wrapper,
NULL);
if (raw_socket_event == NULL) {
return FAILURE;
}
if (tc_event_add(event_loop, raw_socket_event, TC_EVENT_READ)
== TC_EVENT_ERROR)
{
log_info(LOG_ERR, "add raw socket(%d) to event loop failed.",
raw_socket_event->fd);
return FAILURE;
}
/* Init output raw socket info */
send_init();
return SUCCESS;
}else{
#if (UDPCOPY_OFFLINE)
select_offline_set_callback(send_packets_from_pcap);
pcap_file = clt_settings.pcap_file;
if (pcap_file != NULL){
if ((pcap = pcap_open_offline(pcap_file, ebuf)) == NULL){
log_info(LOG_ERR, "open %s" , ebuf);
fprintf(stderr, "open %s\n", ebuf);
return FAILURE;
}else{
gettimeofday(&base_time, NULL);
log_info(LOG_NOTICE, "open pcap success:%s", pcap_file);
log_info(LOG_NOTICE, "send the first packets here");
send_packets_from_pcap(1);
}
}else{
return FAILURE;
}
#else
return FAILURE;
#endif
}
return SUCCESS;
}
/* Initiate tcpcopy client */
int
tcp_copy_init(tc_event_loop_t *event_loop)
{
int i;
#if (TCPCOPY_OFFLINE)
char *pcap_file, ebuf[PCAP_ERRBUF_SIZE];
#endif
uint16_t online_port, target_port;
uint32_t target_ip;
tc_event_t *raw_socket_event;
ip_port_pair_mapping_t *pair, **mappings;
/* keep it temporarily */
select_server_set_callback(dispose_event);
/* Register a timer to check resource every minute */
tc_event_timer_add(event_loop, 60000, check_resource_usage);
/* Init session table*/
init_for_sessions();
localhost = inet_addr("127.0.0.1");
/* Init output raw socket info */
send_init();
/* Add connections to the tested server for exchanging info */
mappings = clt_settings.transfer.mappings;
for (i = 0; i < clt_settings.transfer.num; i++) {
pair = mappings[i];
online_port = pair->online_port;
target_ip = pair->target_ip;
target_port = pair->target_port;
if (address_add_msg_conn(event_loop, online_port, target_ip,
clt_settings.srv_port))
{
return FAILURE;
}
tc_log_info(LOG_NOTICE, 0, "add a tunnel for exchanging info:%u",
ntohs(target_port));
}
#if (!TCPCOPY_OFFLINE)
/* Init input raw socket info */
raw_sock = init_input_raw_socket();
#endif
if (raw_sock != -1) {
/* Add the input raw socket to select */
raw_socket_event = tc_event_create(raw_sock, dispose_event_wrapper,
NULL);
if (raw_socket_event == NULL) {
return FAILURE;
}
if (tc_event_add(event_loop, raw_socket_event, TC_EVENT_READ)
== TC_EVENT_ERROR)
{
tc_log_info(LOG_ERR, 0, "add raw socket(%d) to event loop failed.",
raw_socket_event->fd);
return FAILURE;
}
/* Init output raw socket info */
send_init();
/* Add connections to the tested server for exchanging info */
mappings = clt_settings.transfer.mappings;
for (i = 0; i < clt_settings.transfer.num; i++) {
pair = mappings[i];
online_port = pair->online_port;
target_ip = pair->target_ip;
target_port = pair->target_port;
if (address_add_msg_conn(event_loop, online_port, target_ip,
clt_settings.srv_port) == -1)
{
return FAILURE;
}
tc_log_info(LOG_NOTICE, 0, "add a tunnel for exchanging info:%u",
ntohs(target_port));
}
return SUCCESS;
} else {
#if (TCPCOPY_OFFLINE)
select_offline_set_callback(send_packets_from_pcap);
pcap_file = clt_settings.pcap_file;
if (pcap_file != NULL) {
if ((pcap = pcap_open_offline(pcap_file, ebuf)) == NULL) {
tc_log_info(LOG_ERR, 0, "open %s" , ebuf);
fprintf(stderr, "open %s\n", ebuf);
return FAILURE;
} else {
gettimeofday(&base_time, NULL);
tc_log_info(LOG_NOTICE, 0, "open pcap success:%s", pcap_file);
tc_log_info(LOG_NOTICE, 0, "send the first packets here");
send_packets_from_pcap(1);
}
} else {
return FAILURE;
}
#else
return FAILURE;
#endif
}
return SUCCESS;
}
