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tun_dev_server.cpp
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325 lines (248 loc) · 9.83 KB
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#include "tun_dev.h"
static dest_t udp_dest;
static dest_t tun_dest;
static void local_listen_cb(struct ev_loop *loop, struct ev_io *watcher, int revents) {
char data[buf_len];
int len;
assert(!(revents & EV_ERROR));
conn_info_t &conn_info = *((conn_info_t *)watcher->data);
int local_listen_fd = watcher->fd;
// struct sockaddr_in udp_new_addr_in={0};
// socklen_t udp_new_addr_len = sizeof(sockaddr_in);
address_t::storage_t udp_new_addr_in = {0};
socklen_t udp_new_addr_len = sizeof(address_t::storage_t);
if ((len = recvfrom(local_listen_fd, data, max_data_len + 1, 0,
(struct sockaddr *)&udp_new_addr_in, &udp_new_addr_len)) < 0) {
mylog(log_error, "recv_from error,this shouldnt happen,err=%s,but we can try to continue\n", strerror(errno));
return;
// myexit(1);
};
address_t new_addr;
new_addr.from_sockaddr((struct sockaddr *)&udp_new_addr_in, udp_new_addr_len);
if (len == max_data_len + 1) {
mylog(log_warn, "huge packet, data_len > %d,dropped\n", max_data_len);
return;
}
if (de_cook(data, len) < 0) {
mylog(log_warn, "de_cook(data,len)failed \n");
return;
}
char header = 0;
if (get_header(header, data, len) != 0) {
mylog(log_warn, "get_header() failed\n");
return;
}
if (udp_dest.inner.fd_addr.addr == new_addr) {
if (header == header_keep_alive) {
mylog(log_trace, "got keep_alive packet\n");
return;
}
if (header != header_new_connect && header != header_normal) {
mylog(log_warn, "invalid header\n");
return;
}
} else {
if (header == header_keep_alive) {
mylog(log_debug, "got keep_alive packet from unexpected client\n");
return;
}
if (header == header_new_connect) {
mylog(log_info, "new connection from %s\n", new_addr.get_str());
udp_dest.inner.fd_addr.addr = new_addr;
// udp_dest.inner.fd_ip_port.ip_port.ip=udp_new_addr_in.sin_addr.s_addr;
// udp_dest.inner.fd_ip_port.ip_port.port=ntohs(udp_new_addr_in.sin_port);
conn_info.fec_decode_manager.clear();
conn_info.fec_encode_manager.clear_data();
conn_info.stat.clear();
} else if (header == header_normal) {
mylog(log_debug, "rejected connection from %s\n", new_addr.get_str());
len = 1;
data[0] = header_reject;
do_cook(data, len);
dest_t tmp_dest;
tmp_dest.type = type_fd_addr;
tmp_dest.inner.fd_addr.fd = local_listen_fd;
tmp_dest.inner.fd_addr.addr = new_addr;
delay_manager.add(0, tmp_dest, data, len);
;
return;
} else {
mylog(log_warn, "invalid header\n");
}
}
mylog(log_trace, "Received packet from %s,len: %d\n", new_addr.get_str(), len);
from_fec_to_normal2(conn_info, tun_dest, data, len);
}
static void tun_fd_cb(struct ev_loop *loop, struct ev_io *watcher, int revents) {
char data[buf_len];
int len;
assert(!(revents & EV_ERROR));
conn_info_t &conn_info = *((conn_info_t *)watcher->data);
int tun_fd = watcher->fd;
len = read(tun_fd, data, max_data_len + 1);
if (len == max_data_len + 1) {
mylog(log_warn, "huge packet, data_len > %d,dropped\n", max_data_len);
return;
}
if (len < 0) {
mylog(log_warn, "read from tun_fd return %d,errno=%s\n", len, strerror(errno));
return;
}
do_mssfix(data, len);
mylog(log_trace, "Received packet from tun,len: %d\n", len);
if (udp_dest.inner.fd_addr.addr.is_vaild() == 0) {
mylog(log_debug, "received packet from tun,but there is no client yet,dropped packet\n");
return;
}
from_normal_to_fec2(conn_info, udp_dest, data, len, header_normal);
}
static void delay_manager_cb(struct ev_loop *loop, struct ev_timer *watcher, int revents) {
assert(!(revents & EV_ERROR));
// do nothing
}
static void fec_encode_cb(struct ev_loop *loop, struct ev_timer *watcher, int revents) {
assert(!(revents & EV_ERROR));
mylog(log_trace, "fec_encode_cb() called\n");
conn_info_t &conn_info = *((conn_info_t *)watcher->data);
assert(udp_dest.inner.fd_addr.addr.is_vaild() != 0);
/// mylog(log_trace,"events[idx].data.u64 == conn_info.fec_encode_manager.get_timer_fd64()\n");
/// uint64_t fd64=events[idx].data.u64;
/// 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_fec2(conn_info, udp_dest, 0, 0, header_normal);
}
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, strerror(errno));
return;
}
buf[len] = 0;
handle_command(buf);
}
static void conn_timer_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);
mylog(log_trace, "conn_timer_cb() called\n");
// uint64_t value;
// read(conn_info.timer.get_timer_fd(), &value, 8);
if (udp_dest.inner.fd_addr.addr.is_vaild() == 0) {
return;
}
conn_info.stat.report_as_server(udp_dest.inner.fd_addr.addr);
do_keep_alive(udp_dest);
}
static void prepare_cb(struct ev_loop *loop, struct ev_prepare *watcher, int revents) {
assert(!(revents & EV_ERROR));
delay_manager.check();
}
int tun_dev_server_event_loop() {
int i, j, k, ret;
int tun_fd;
int local_listen_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
tun_fd = get_tun_fd(tun_dev);
assert(tun_fd > 0);
assert(new_listen_socket2(local_listen_fd, local_addr) == 0);
assert(set_tun(tun_dev, htonl((ntohl(sub_net_uint32) & 0xFFFFFF00) | 1), htonl((ntohl(sub_net_uint32) & 0xFFFFFF00) | 2), tun_mtu) == 0);
udp_dest.cook = 1;
udp_dest.type = type_fd_addr;
udp_dest.inner.fd_addr.fd = local_listen_fd;
udp_dest.inner.fd_addr.addr.clear();
tun_dest.type = type_write_fd;
tun_dest.inner.fd = tun_fd;
/// 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);
/// ev.events = EPOLLIN;
/// ev.data.u64 = tun_fd;
/// ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, tun_fd, &ev);
/// if (ret!=0) {
/// mylog(log_fatal,"add tun_fd error\n");
/// myexit(-1);
/// }
struct ev_io tun_fd_watcher;
tun_fd_watcher.data = &conn_info;
ev_io_init(&tun_fd_watcher, tun_fd_cb, tun_fd, EV_READ);
ev_io_start(loop, &tun_fd_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);
/// u64_t tmp_timer_fd64=conn_info.fec_encode_manager.get_timer_fd64();
/// ev.events = EPOLLIN;
/// ev.data.u64 = tmp_timer_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_timer_fd64), &ev);
/// if (ret!= 0) {
/// mylog(log_fatal,"add fec_encode_manager.get_timer_fd64() error\n");
/// myexit(-1);
/// }
conn_info.fec_encode_manager.set_data(&conn_info);
conn_info.fec_encode_manager.set_loop_and_cb(loop, fec_encode_cb);
/// conn_info.timer.add_fd_to_epoll(epoll_fd);
/// conn_info.timer.set_timer_repeat_us(timer_interval*1000);
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);
struct ev_io fifo_watcher;
int fifo_fd = -1;
if (fifo_file[0] != 0) {
fifo_fd = create_fifo(fifo_file);
ev_io_init(&fifo_watcher, fifo_cb, fifo_fd, EV_READ);
ev_io_start(loop, &fifo_watcher);
mylog(log_info, "fifo_file=%s\n", fifo_file);
}
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);
return 0;
}