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#include "tunnel.h"
void data_from_local_or_fec_timeout(conn_info_t &conn_info, int is_time_out) {
fd64_t &remote_fd64 = conn_info.remote_fd64;
int &local_listen_fd = conn_info.local_listen_fd;
char data[buf_len];
int data_len;
address_t addr;
u32_t conv;
int out_n;
char **out_arr;
int *out_len;
my_time_t *out_delay;
dest_t dest;
dest.type = type_fd64;
dest.inner.fd64 = remote_fd64;
dest.cook = 1;
if (is_time_out) {
// fd64_t fd64=events[idx].data.u64;
mylog(log_trace, "events[idx].data.u64 == conn_info.fec_encode_manager.get_timer_fd64()\n");
// uint64_t value;
// if(!fd_manager.exist(fd64)) //fd64 has been closed
//{
// mylog(log_trace,"!fd_manager.exist(fd64)");
// continue;
// }
// if((ret=read(fd_manager.to_fd(fd64), &value, 8))!=8)
//{
// mylog(log_trace,"(ret=read(fd_manager.to_fd(fd64), &value, 8))!=8,ret=%d\n",ret);
// continue;
// }
// if(value==0)
//{
// mylog(log_debug,"value==0\n");
// continue;
// }
// assert(value==1);
from_normal_to_fec(conn_info, 0, 0, out_n, out_arr, out_len, out_delay);
} else // events[idx].data.u64 == (u64_t)local_listen_fd
{
mylog(log_trace, "events[idx].data.u64 == (u64_t)local_listen_fd\n");
address_t::storage_t udp_new_addr_in = {0};
socklen_t udp_new_addr_len = sizeof(address_t::storage_t);
if ((data_len = recvfrom(local_listen_fd, data, max_data_len + 1, 0,
(struct sockaddr *)&udp_new_addr_in, &udp_new_addr_len)) == -1) {
mylog(log_debug, "recv_from error,this shouldnt happen,err=%s,but we can try to continue\n", get_sock_error());
return;
};
if (data_len == max_data_len + 1) {
mylog(log_warn, "huge packet from upper level, data_len > %d, packet truncated, dropped\n", max_data_len);
return;
}
if (!disable_mtu_warn && data_len >= mtu_warn) {
mylog(log_warn, "huge packet,data len=%d (>=%d).strongly suggested to set a smaller mtu at upper level,to get rid of this warn\n ", data_len, mtu_warn);
}
addr.from_sockaddr((struct sockaddr *)&udp_new_addr_in, udp_new_addr_len);
mylog(log_trace, "Received packet from %s, len: %d\n", addr.get_str(), data_len);
// u64_t u64=ip_port.to_u64();
if (!conn_info.conv_manager.c.is_data_used(addr)) {
if (conn_info.conv_manager.c.get_size() >= max_conv_num) {
mylog(log_warn, "ignored new udp connect bc max_conv_num exceed\n");
return;
}
conv = conn_info.conv_manager.c.get_new_conv();
conn_info.conv_manager.c.insert_conv(conv, addr);
mylog(log_info, "new packet from %s,conv_id=%x\n", addr.get_str(), conv);
} else {
conv = conn_info.conv_manager.c.find_conv_by_data(addr);
mylog(log_trace, "conv=%d\n", conv);
}
conn_info.conv_manager.c.update_active_time(conv);
char *new_data;
int new_len;
put_conv(conv, data, data_len, new_data, new_len);
mylog(log_trace, "data_len=%d new_len=%d\n", data_len, new_len);
from_normal_to_fec(conn_info, new_data, new_len, out_n, out_arr, out_len, out_delay);
}
mylog(log_trace, "out_n=%d\n", out_n);
for (int i = 0; i < out_n; i++) {
delay_send(out_delay[i], dest, out_arr[i], out_len[i]);
}
}
static void local_listen_cb(struct ev_loop *loop, struct ev_io *watcher, int revents) {
assert(!(revents & EV_ERROR));
conn_info_t &conn_info = *((conn_info_t *)watcher->data);
data_from_local_or_fec_timeout(conn_info, 0);
}
static void remote_cb(struct ev_loop *loop, struct ev_io *watcher, int revents) {
assert(!(revents & EV_ERROR));
conn_info_t &conn_info = *((conn_info_t *)watcher->data);
char data[buf_len];
if (!fd_manager.exist(watcher->u64)) // fd64 has been closed
{
mylog(log_trace, "!fd_manager.exist(events[idx].data.u64)");
return;
}
fd64_t &remote_fd64 = conn_info.remote_fd64;
int &remote_fd = conn_info.remote_fd;
assert(watcher->u64 == remote_fd64);
int fd = fd_manager.to_fd(remote_fd64);
int data_len = recv(fd, data, max_data_len + 1, 0);
if (data_len == max_data_len + 1) {
mylog(log_warn, "huge packet, data_len > %d, packet truncated, dropped\n", max_data_len);
return;
}
mylog(log_trace, "received data from udp fd %d, len=%d\n", remote_fd, data_len);
if (data_len < 0) {
if (get_sock_errno() == ECONNREFUSED) {
mylog(log_debug, "recv failed %d ,udp_fd%d,errno:%s\n", data_len, remote_fd, get_sock_error());
}
mylog(log_warn, "recv failed %d ,udp_fd%d,errno:%s\n", data_len, remote_fd, get_sock_error());
return;
}
if (!disable_mtu_warn && data_len > mtu_warn) {
mylog(log_warn, "huge packet,data len=%d (>%d).strongly suggested to set a smaller mtu at upper level,to get rid of this warn\n ", data_len, mtu_warn);
}
if (de_cook(data, data_len) != 0) {
mylog(log_debug, "de_cook error");
return;
}
int out_n;
char **out_arr;
int *out_len;
my_time_t *out_delay;
from_fec_to_normal(conn_info, data, data_len, out_n, out_arr, out_len, out_delay);
mylog(log_trace, "out_n=%d\n", out_n);
for (int i = 0; i < out_n; i++) {
u32_t conv;
char *new_data;
int new_len;
if (get_conv(conv, out_arr[i], out_len[i], new_data, new_len) != 0) {
mylog(log_debug, "get_conv(conv,out_arr[i],out_len[i],new_data,new_len)!=0");
continue;
}
if (!conn_info.conv_manager.c.is_conv_used(conv)) {
mylog(log_trace, "!conn_info.conv_manager.is_conv_used(conv)");
continue;
}
conn_info.conv_manager.c.update_active_time(conv);
address_t addr = conn_info.conv_manager.c.find_data_by_conv(conv);
dest_t dest;
dest.inner.fd_addr.fd = conn_info.local_listen_fd;
dest.inner.fd_addr.addr = addr;
dest.type = type_fd_addr;
delay_send(out_delay[i], dest, new_data, new_len);
}
}
static void fifo_cb(struct ev_loop *loop, struct ev_io *watcher, int revents) {
assert(!(revents & EV_ERROR));
int fifo_fd = watcher->fd;
char buf[buf_len];
int len = read(fifo_fd, buf, sizeof(buf));
if (len < 0) {
mylog(log_warn, "fifo read failed len=%d,errno=%s\n", len, get_sock_error());
return;
}
buf[len] = 0;
handle_command(buf);
}
static void delay_manager_cb(struct ev_loop *loop, struct ev_timer *watcher, int revents) {
assert(!(revents & EV_ERROR));
// uint64_t value;
// read(delay_manager.get_timer_fd(), &value, 8);
// mylog(log_trace,"events[idx].data.u64 == (u64_t)delay_manager.get_timer_fd()\n");
// do nothing
}
static void fec_encode_cb(struct ev_loop *loop, struct ev_timer *watcher, int revents) {
assert(!(revents & EV_ERROR));
conn_info_t &conn_info = *((conn_info_t *)watcher->data);
data_from_local_or_fec_timeout(conn_info, 1);
}
static void conn_timer_cb(struct ev_loop *loop, struct ev_timer *watcher, int revents) {
assert(!(revents & EV_ERROR));
uint64_t value;
conn_info_t &conn_info = *((conn_info_t *)watcher->data);
// read(conn_info.timer.get_timer_fd(), &value, 8);
conn_info.conv_manager.c.clear_inactive();
mylog(log_trace, "events[idx].data.u64==(u64_t)conn_info.timer.get_timer_fd()\n");
conn_info.stat.report_as_client();
if (debug_force_flush_fec) {
int out_n;
char **out_arr;
int *out_len;
my_time_t *out_delay;
dest_t dest;
dest.type = type_fd64;
dest.inner.fd64 = conn_info.remote_fd64;
dest.cook = 1;
from_normal_to_fec(conn_info, 0, 0, out_n, out_arr, out_len, out_delay);
for (int i = 0; i < out_n; i++) {
delay_send(out_delay[i], dest, out_arr[i], out_len[i]);
}
}
}
static void prepare_cb(struct ev_loop *loop, struct ev_prepare *watcher, int revents) {
assert(!(revents & EV_ERROR));
delay_manager.check();
}
int tunnel_client_event_loop() {
int i, j, k;
int ret;
int yes = 1;
// int epoll_fd;
conn_info_t *conn_info_p = new conn_info_t;
conn_info_t &conn_info = *conn_info_p; // huge size of conn_info,do not allocate on stack
int &local_listen_fd = conn_info.local_listen_fd;
new_listen_socket2(local_listen_fd, local_addr);
// epoll_fd = epoll_create1(0);
// assert(epoll_fd>0);
// const int max_events = 4096;
// struct epoll_event ev, events[max_events];
// if (epoll_fd < 0) {
// mylog(log_fatal,"epoll return %d\n", epoll_fd);
// myexit(-1);
// }
struct ev_loop *loop = ev_default_loop(0);
assert(loop != NULL);
conn_info.loop = loop;
// ev.events = EPOLLIN;
// ev.data.u64 = local_listen_fd;
// ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, local_listen_fd, &ev);
// if (ret!=0) {
// mylog(log_fatal,"add udp_listen_fd error\n");
// myexit(-1);
// }
struct ev_io local_listen_watcher;
local_listen_watcher.data = &conn_info;
ev_io_init(&local_listen_watcher, local_listen_cb, local_listen_fd, EV_READ);
ev_io_start(loop, &local_listen_watcher);
int &remote_fd = conn_info.remote_fd;
fd64_t &remote_fd64 = conn_info.remote_fd64;
assert(new_connected_socket2(remote_fd, remote_addr, out_addr, out_interface) == 0);
remote_fd64 = fd_manager.create(remote_fd);
mylog(log_debug, "remote_fd64=%llu\n", remote_fd64);
// ev.events = EPOLLIN;
// ev.data.u64 = remote_fd64;
// ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, remote_fd, &ev);
// if (ret!= 0) {
// mylog(log_fatal,"add raw_fd error\n");
// myexit(-1);
// }
struct ev_io remote_watcher;
remote_watcher.data = &conn_info;
remote_watcher.u64 = remote_fd64;
ev_io_init(&remote_watcher, remote_cb, remote_fd, EV_READ);
ev_io_start(loop, &remote_watcher);
// ev.events = EPOLLIN;
// ev.data.u64 = delay_manager.get_timer_fd();
// mylog(log_debug,"delay_manager.get_timer_fd()=%d\n",delay_manager.get_timer_fd());
// ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, delay_manager.get_timer_fd(), &ev);
// if (ret!= 0) {
// mylog(log_fatal,"add delay_manager.get_timer_fd() error\n");
// myexit(-1);
// }
delay_manager.set_loop_and_cb(loop, delay_manager_cb);
conn_info.fec_encode_manager.set_data(&conn_info);
conn_info.fec_encode_manager.set_loop_and_cb(loop, fec_encode_cb);
// u64_t tmp_fd64=conn_info.fec_encode_manager.get_timer_fd64();
// ev.events = EPOLLIN;
// ev.data.u64 = tmp_fd64;
// mylog(log_debug,"conn_info.fec_encode_manager.get_timer_fd64()=%llu\n",conn_info.fec_encode_manager.get_timer_fd64());
// ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fd_manager.to_fd(tmp_fd64), &ev);
// if (ret!= 0) {
// mylog(log_fatal,"add fec_encode_manager.get_timer_fd64() error\n");
// myexit(-1);
// }
conn_info.timer.data = &conn_info;
ev_init(&conn_info.timer, conn_timer_cb);
ev_timer_set(&conn_info.timer, 0, timer_interval / 1000.0);
ev_timer_start(loop, &conn_info.timer);
// conn_info.timer.add_fd_to_epoll(epoll_fd);
// conn_info.timer.set_timer_repeat_us(timer_interval*1000);
// mylog(log_debug,"conn_info.timer.get_timer_fd()=%d\n",conn_info.timer.get_timer_fd());
struct ev_io fifo_watcher;
int fifo_fd = -1;
if (fifo_file[0] != 0) {
fifo_fd = create_fifo(fifo_file);
// ev.events = EPOLLIN;
// ev.data.u64 = fifo_fd;
// ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fifo_fd, &ev);
// if (ret!= 0) {
// mylog(log_fatal,"add fifo_fd to epoll error %s\n",strerror(errno));
// myexit(-1);
// }
mylog(log_info, "fifo_file=%s\n", fifo_file);
ev_io_init(&fifo_watcher, fifo_cb, fifo_fd, EV_READ);
ev_io_start(loop, &fifo_watcher);
}
ev_prepare prepare_watcher;
ev_init(&prepare_watcher, prepare_cb);
ev_prepare_start(loop, &prepare_watcher);
mylog(log_info, "now listening at %s\n", local_addr.get_str());
ev_run(loop, 0);
mylog(log_warn, "ev_run returned\n");
myexit(0);
/*
while(1)////////////////////////
{
if(about_to_exit) myexit(0);
int nfds = epoll_wait(epoll_fd, events, max_events, 180 * 1000);
if (nfds < 0) { //allow zero
if(errno==EINTR )
{
mylog(log_info,"epoll interrupted by signal continue\n");
}
else
{
mylog(log_fatal,"epoll_wait return %d,%s\n", nfds,strerror(errno));
myexit(-1);
}
}
int idx;
for (idx = 0; idx < nfds; ++idx) {
if(events[idx].data.u64==(u64_t)conn_info.timer.get_timer_fd())
{
}
else if (events[idx].data.u64 == (u64_t)fifo_fd)
{
}
else if (events[idx].data.u64 == (u64_t)local_listen_fd||events[idx].data.u64 == conn_info.fec_encode_manager.get_timer_fd64())
{
}
else if (events[idx].data.u64 == (u64_t)delay_manager.get_timer_fd()) {
}
else if(events[idx].data.u64>u32_t(-1) )
{
}
else
{
mylog(log_fatal,"unknown fd,this should never happen\n");
myexit(-1);
}
}
//delay_manager.check();
}*/
return 0;
}
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