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udp2raw/server.cpp

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/*
* server.cpp
*
* Created on: Aug 29, 2018
* Author: root
*/
#ifndef UDP2RAW_MP
#include "common.h"
#include "network.h"
#include "connection.h"
#include "misc.h"
#include "log.h"
#include "lib/md5.h"
#include "encrypt.h"
#include "fd_manager.h"
int server_on_timer_multi(conn_info_t &conn_info) // for server. called when a timer is ready in epoll.for server,there will be one timer for every connection
// there is also a global timer for server,but its not handled here
{
char ip_port[max_addr_len];
// u32_t ip=conn_info.raw_info.send_info.dst_ip;
// u32_t port=conn_info.raw_info.send_info.dst_port;
address_t tmp_addr;
tmp_addr.from_ip_port_new(raw_ip_version, &conn_info.raw_info.send_info.new_dst_ip, conn_info.raw_info.send_info.dst_port);
// sprintf(ip_port,"%s:%d",my_ntoa(ip),port);
tmp_addr.to_str(ip_port);
// keep_iptables_rule();
mylog(log_trace, "server timer!\n");
raw_info_t &raw_info = conn_info.raw_info;
assert(conn_info.state.server_current_state == server_ready);
if (conn_info.state.server_current_state == server_ready) {
conn_info.blob->conv_manager.s.clear_inactive(ip_port);
/*
if( get_current_time()-conn_info.last_hb_recv_time>heartbeat_timeout )
{
mylog(log_trace,"%lld %lld\n",get_current_time(),conn_info.last_state_time);
conn_info.server_current_state=server_nothing;
//conn_manager.current_ready_ip=0;
//conn_manager.current_ready_port=0;
mylog(log_info,"changed state to server_nothing\n");
return 0;
}*/
// dont need to do this at server,conn_manger will clear expired connections
if (get_current_time() - conn_info.last_hb_sent_time < heartbeat_interval) {
return 0;
}
if (hb_mode == 0)
send_safer(conn_info, 'h', hb_buf, 0); /////////////send
else
send_safer(conn_info, 'h', hb_buf, hb_len);
conn_info.last_hb_sent_time = get_current_time();
mylog(log_debug, "heart beat sent<%x,%x>\n", conn_info.my_id, conn_info.oppsite_id);
} else {
mylog(log_fatal, "this shouldnt happen!\n");
myexit(-1);
}
return 0;
}
int server_on_raw_recv_ready(conn_info_t &conn_info, char *ip_port, char type, char *data, int data_len) // called while the state for a connection is server_ready
// receives data and heart beat by recv_safer.
{
raw_info_t &raw_info = conn_info.raw_info;
packet_info_t &send_info = conn_info.raw_info.send_info;
packet_info_t &recv_info = conn_info.raw_info.recv_info;
// char ip_port[40];
// sprintf(ip_port,"%s:%d",my_ntoa(recv_info.src_ip),recv_info.src_port);
/*
if (recv_info.src_ip != send_info.dst_ip
|| recv_info.src_port != send_info.dst_port) {
mylog(log_debug, "unexpected adress\n");
return 0;
}*/
if (type == 'h' && data_len >= 0) {
// u32_t tmp = ntohl(*((u32_t *) &data[sizeof(u32_t)]));
mylog(log_debug, "[%s][hb]received hb \n", ip_port);
conn_info.last_hb_recv_time = get_current_time();
return 0;
} else if (type == 'd' && data_len >= int(sizeof(u32_t))) {
// u32_t tmp_conv_id = ntohl(*((u32_t *) &data[0]));
my_id_t tmp_conv_id;
memcpy(&tmp_conv_id, &data[0], sizeof(tmp_conv_id));
tmp_conv_id = ntohl(tmp_conv_id);
if (hb_mode == 0)
conn_info.last_hb_recv_time = get_current_time();
mylog(log_trace, "conv:%u\n", tmp_conv_id);
if (!conn_info.blob->conv_manager.s.is_conv_used(tmp_conv_id)) {
if (conn_info.blob->conv_manager.s.get_size() >= max_conv_num) {
mylog(log_warn,
"[%s]ignored new conv %x connect bc max_conv_num exceed\n", ip_port,
tmp_conv_id);
return 0;
}
/*
struct sockaddr_in remote_addr_in={0};
socklen_t slen = sizeof(sockaddr_in);
//memset(&remote_addr_in, 0, sizeof(remote_addr_in));
remote_addr_in.sin_family = AF_INET;
remote_addr_in.sin_port = htons(remote_port);
remote_addr_in.sin_addr.s_addr = remote_ip_uint32;
int new_udp_fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (new_udp_fd < 0) {
mylog(log_warn, "[%s]create udp_fd error\n",ip_port);
return -1;
}
setnonblocking(new_udp_fd);
set_buf_size(new_udp_fd,socket_buf_size);
mylog(log_debug, "[%s]created new udp_fd %d\n",ip_port, new_udp_fd);
int ret = connect(new_udp_fd, (struct sockaddr *) &remote_addr_in,
slen);
if (ret != 0) {
mylog(log_warn, "udp fd connect fail\n");
close(new_udp_fd);
return -1;
}*/
int new_udp_fd = remote_addr.new_connected_udp_fd();
if (new_udp_fd < 0) {
mylog(log_warn, "[%s]new_connected_udp_fd() failed\n", ip_port);
return -1;
}
struct epoll_event ev;
fd64_t new_udp_fd64 = fd_manager.create(new_udp_fd);
fd_manager.get_info(new_udp_fd64).p_conn_info = &conn_info;
mylog(log_trace, "[%s]u64: %lld\n", ip_port, new_udp_fd64);
ev.events = EPOLLIN;
ev.data.u64 = new_udp_fd64;
int ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, new_udp_fd, &ev);
if (ret != 0) {
mylog(log_warn, "[%s]add udp_fd error\n", ip_port);
close(new_udp_fd);
return -1;
}
conn_info.blob->conv_manager.s.insert_conv(tmp_conv_id, new_udp_fd64);
// assert(conn_manager.udp_fd_mp.find(new_udp_fd)==conn_manager.udp_fd_mp.end());
// conn_manager.udp_fd_mp[new_udp_fd] = &conn_info;
// pack_u64(conn_info.raw_info.recv_info.src_ip,conn_info.raw_info.recv_info.src_port);
mylog(log_info, "[%s]new conv conv_id=%x, assigned fd=%d\n", ip_port,
tmp_conv_id, new_udp_fd);
}
fd64_t fd64 = conn_info.blob->conv_manager.s.find_data_by_conv(tmp_conv_id);
conn_info.blob->conv_manager.s.update_active_time(tmp_conv_id);
int fd = fd_manager.to_fd(fd64);
mylog(log_trace, "[%s]received a data from fake tcp,len:%d\n", ip_port, data_len);
int ret = send(fd, data + sizeof(u32_t),
data_len - (sizeof(u32_t)), 0);
mylog(log_trace, "[%s]%d byte sent ,fd :%d\n ", ip_port, ret, fd);
if (ret < 0) {
mylog(log_warn, "send returned %d\n", ret);
// perror("what happened????");
}
return 0;
}
return 0;
}
int server_on_raw_recv_pre_ready(conn_info_t &conn_info, char *ip_port, u32_t tmp_oppsite_const_id) // do prepare work before state change to server ready for a specifc connection
// connection recovery is also handle here
{
// u32_t ip;uint16_t port;
// ip=conn_info.raw_info.recv_info.src_ip;
// port=conn_info.raw_info.recv_info.src_port;
// char ip_port[40];
// sprintf(ip_port,"%s:%d",my_ntoa(ip),port);
mylog(log_info, "[%s]received handshake oppsite_id:%x my_id:%x\n", ip_port, conn_info.oppsite_id, conn_info.my_id);
mylog(log_info, "[%s]oppsite const_id:%x \n", ip_port, tmp_oppsite_const_id);
if (conn_manager.const_id_mp.find(tmp_oppsite_const_id) == conn_manager.const_id_mp.end()) {
// conn_manager.const_id_mp=
if (conn_manager.ready_num >= max_ready_conn_num) {
mylog(log_info, "[%s]max_ready_conn_num,cant turn to ready\n", ip_port);
conn_info.state.server_current_state = server_idle;
return 0;
}
conn_info.prepare();
conn_info.state.server_current_state = server_ready;
conn_info.oppsite_const_id = tmp_oppsite_const_id;
conn_manager.ready_num++;
conn_manager.const_id_mp[tmp_oppsite_const_id] = &conn_info;
// conn_info.last_state_time=get_current_time(); //dont change this!!!!!!!!!!!!!!!!!!!!!!!!!
// conn_manager.current_ready_ip=ip;
// conn_manager.current_ready_port=port;
// my_id=conn_info.my_id;
// oppsite_id=conn_info.oppsite_id;
conn_info.last_hb_recv_time = get_current_time();
conn_info.last_hb_sent_time = conn_info.last_hb_recv_time; //=get_current_time()
if (hb_mode == 0)
send_safer(conn_info, 'h', hb_buf, 0); /////////////send
else
send_safer(conn_info, 'h', hb_buf, hb_len);
mylog(log_info, "[%s]changed state to server_ready\n", ip_port);
conn_info.blob->anti_replay.re_init();
// g_conn_info=conn_info;
int new_timer_fd;
set_timer_server(epollfd, new_timer_fd, conn_info.timer_fd64);
fd_manager.get_info(conn_info.timer_fd64).p_conn_info = &conn_info;
// assert(conn_manager.timer_fd_mp.find(new_timer_fd)==conn_manager.timer_fd_mp.end());
// conn_manager.timer_fd_mp[new_timer_fd] = &conn_info;//pack_u64(ip,port);
// timer_fd_mp[new_timer_fd]
/*
if(oppsite_const_id!=0&&tmp_oppsite_const_id!=oppsite_const_id) //TODO MOVE TO READY
{
mylog(log_info,"cleared all conv bc of const id doesnt match\n");
conv_manager.clear();
}*/
// oppsite_const_id=tmp_oppsite_const_id;
} else {
conn_info_t &ori_conn_info = *conn_manager.const_id_mp[tmp_oppsite_const_id];
if (ori_conn_info.state.server_current_state == server_ready) {
if (conn_info.last_state_time < ori_conn_info.last_state_time) {
mylog(log_info, "[%s]conn_info.last_state_time<ori_conn_info.last_state_time. ignored new handshake\n", ip_port);
conn_info.state.server_current_state = server_idle;
conn_info.oppsite_const_id = 0;
return 0;
}
address_t addr1;
addr1.from_ip_port_new(raw_ip_version, &ori_conn_info.raw_info.recv_info.new_src_ip, ori_conn_info.raw_info.recv_info.src_port);
if (!conn_manager.exist(addr1)) // TODO remove this
{
mylog(log_fatal, "[%s]this shouldnt happen\n", ip_port);
myexit(-1);
}
address_t addr2;
addr2.from_ip_port_new(raw_ip_version, &conn_info.raw_info.recv_info.new_src_ip, conn_info.raw_info.recv_info.src_port);
if (!conn_manager.exist(addr2)) // TODO remove this
{
mylog(log_fatal, "[%s]this shouldnt happen2\n", ip_port);
myexit(-1);
}
conn_info_t *&p_ori = conn_manager.find_insert_p(addr1);
conn_info_t *&p = conn_manager.find_insert_p(addr2);
conn_info_t *tmp = p;
p = p_ori;
p_ori = tmp;
mylog(log_info, "[%s]grabbed a connection\n", ip_port);
// ori_conn_info.state.server_current_state=server_ready;
ori_conn_info.recover(conn_info);
// send_safer(ori_conn_info, 'h',hb_buf, hb_len);
// ori_conn_info.blob->anti_replay.re_init();
if (hb_mode == 0)
send_safer(ori_conn_info, 'h', hb_buf, 0); /////////////send
else
send_safer(ori_conn_info, 'h', hb_buf, hb_len);
ori_conn_info.last_hb_recv_time = get_current_time();
conn_info.state.server_current_state = server_idle;
conn_info.oppsite_const_id = 0;
} else {
mylog(log_fatal, "[%s]this should never happen\n", ip_port);
myexit(-1);
}
return 0;
}
return 0;
}
int server_on_raw_recv_handshake1(conn_info_t &conn_info, char *ip_port, char *data, int data_len) // called when server received a handshake1 packet from client
{
packet_info_t &send_info = conn_info.raw_info.send_info;
packet_info_t &recv_info = conn_info.raw_info.recv_info;
raw_info_t &raw_info = conn_info.raw_info;
// u32_t ip=conn_info.raw_info.recv_info.src_ip;
// uint16_t port=conn_info.raw_info.recv_info.src_port;
// char ip_port[40];
// sprintf(ip_port,"%s:%d",my_ntoa(ip),port);
if (data_len < int(3 * sizeof(my_id_t))) {
mylog(log_debug, "[%s] data_len=%d too short to be a handshake\n", ip_port, data_len);
return -1;
}
// id_t tmp_oppsite_id= ntohl(* ((u32_t *)&data[0]));
my_id_t tmp_oppsite_id;
memcpy(&tmp_oppsite_id, (u32_t *)&data[0], sizeof(tmp_oppsite_id));
tmp_oppsite_id = ntohl(tmp_oppsite_id);
// id_t tmp_my_id=ntohl(* ((u32_t *)&data[sizeof(id_t)]));
my_id_t tmp_my_id;
memcpy(&tmp_my_id, &data[sizeof(my_id_t)], sizeof(tmp_my_id));
tmp_my_id = ntohl(tmp_my_id);
if (tmp_my_id == 0) // received init handshake again
{
if (raw_mode == mode_faketcp) {
send_info.seq = recv_info.ack_seq;
send_info.ack_seq = recv_info.seq + raw_info.recv_info.data_len;
send_info.ts_ack = recv_info.ts;
}
if (raw_mode == mode_icmp) {
send_info.my_icmp_seq = recv_info.my_icmp_seq;
}
send_handshake(raw_info, conn_info.my_id, tmp_oppsite_id, const_id); //////////////send
mylog(log_info, "[%s]changed state to server_handshake1,my_id is %x\n", ip_port, conn_info.my_id);
} else if (tmp_my_id == conn_info.my_id) {
conn_info.oppsite_id = tmp_oppsite_id;
// id_t tmp_oppsite_const_id=ntohl(* ((u32_t *)&data[sizeof(id_t)*2]));
my_id_t tmp_oppsite_const_id;
memcpy(&tmp_oppsite_const_id, &data[sizeof(my_id_t) * 2], sizeof(tmp_oppsite_const_id));
tmp_oppsite_const_id = ntohl(tmp_oppsite_const_id);
if (raw_mode == mode_faketcp) {
send_info.seq = recv_info.ack_seq;
send_info.ack_seq = recv_info.seq + raw_info.recv_info.data_len;
send_info.ts_ack = recv_info.ts;
}
if (raw_mode == mode_icmp) {
send_info.my_icmp_seq = recv_info.my_icmp_seq;
}
server_on_raw_recv_pre_ready(conn_info, ip_port, tmp_oppsite_const_id);
} else {
mylog(log_debug, "[%s]invalid my_id %x,my_id is %x\n", ip_port, tmp_my_id, conn_info.my_id);
}
return 0;
}
int server_on_recv_safer_multi(conn_info_t &conn_info, char type, char *data, int data_len) {
return 0;
}
int server_on_raw_recv_multi() // called when server received an raw packet
{
char dummy_buf[buf_len];
raw_info_t peek_raw_info;
peek_raw_info.peek = 1;
packet_info_t &peek_info = peek_raw_info.recv_info;
mylog(log_trace, "got a packet\n");
if (pre_recv_raw_packet() < 0) return -1;
if (peek_raw(peek_raw_info) < 0) {
discard_raw_packet();
// recv(raw_recv_fd, 0,0, 0 );//
// struct sockaddr saddr;
// socklen_t saddr_size=sizeof(saddr);
/// recvfrom(raw_recv_fd, 0,0, 0 ,&saddr , &saddr_size);//
mylog(log_trace, "peek_raw failed\n");
return -1;
} else {
mylog(log_trace, "peek_raw success\n");
}
// u32_t ip=peek_info.src_ip;uint16_t port=peek_info.src_port;
int data_len;
char *data;
address_t addr;
addr.from_ip_port_new(raw_ip_version, &peek_info.new_src_ip, peek_info.src_port);
char ip_port[max_addr_len];
addr.to_str(ip_port);
// sprintf(ip_port,"%s:%d",my_ntoa(ip),port);
mylog(log_trace, "[%s]peek_raw\n", ip_port);
if (raw_mode == mode_faketcp && peek_info.syn == 1) {
if (!conn_manager.exist(addr) || conn_manager.find_insert(addr).state.server_current_state != server_ready) { // reply any syn ,before state become ready
raw_info_t tmp_raw_info;
if (recv_raw0(tmp_raw_info, data, data_len) < 0) {
return 0;
}
if (data_len >= max_data_len + 1) {
mylog(log_debug, "data_len=%d >= max_data_len+1,ignored", data_len);
return -1;
}
if (use_tcp_dummy_socket != 0)
return 0;
raw_info_t &raw_info = tmp_raw_info;
packet_info_t &send_info = raw_info.send_info;
packet_info_t &recv_info = raw_info.recv_info;
send_info.new_src_ip = recv_info.new_dst_ip;
send_info.src_port = recv_info.dst_port;
send_info.dst_port = recv_info.src_port;
send_info.new_dst_ip = recv_info.new_src_ip;
if (lower_level) {
handle_lower_level(raw_info);
}
if (data_len == 0 && raw_info.recv_info.syn == 1 && raw_info.recv_info.ack == 0) {
send_info.ack_seq = recv_info.seq + 1;
send_info.psh = 0;
send_info.syn = 1;
send_info.ack = 1;
send_info.ts_ack = recv_info.ts;
mylog(log_info, "[%s]received syn,sent syn ack back\n", ip_port);
send_raw0(raw_info, 0, 0);
return 0;
}
} else {
discard_raw_packet();
// recv(raw_recv_fd, 0,0,0);
}
return 0;
}
if (!conn_manager.exist(addr)) {
if (conn_manager.mp.size() >= max_handshake_conn_num) {
mylog(log_info, "[%s]reached max_handshake_conn_num,ignored new handshake\n", ip_port);
discard_raw_packet();
// recv(raw_recv_fd, 0,0, 0 );//
return 0;
}
raw_info_t tmp_raw_info;
if (raw_mode == mode_icmp) {
tmp_raw_info.send_info.dst_port = tmp_raw_info.send_info.src_port = addr.get_port();
}
if (recv_bare(tmp_raw_info, data, data_len) < 0) {
return 0;
}
if (data_len < int(3 * sizeof(my_id_t))) {
mylog(log_debug, "[%s]too short to be a handshake\n", ip_port);
return -1;
}
// id_t zero=ntohl(* ((u32_t *)&data[sizeof(id_t)]));
my_id_t zero;
memcpy(&zero, &data[sizeof(my_id_t)], sizeof(zero));
zero = ntohl(zero);
if (zero != 0) {
mylog(log_debug, "[%s]not a invalid initial handshake\n", ip_port);
return -1;
}
mylog(log_info, "[%s]got packet from a new ip\n", ip_port);
conn_info_t &conn_info = conn_manager.find_insert(addr);
conn_info.raw_info = tmp_raw_info;
raw_info_t &raw_info = conn_info.raw_info;
packet_info_t &send_info = conn_info.raw_info.send_info;
packet_info_t &recv_info = conn_info.raw_info.recv_info;
// conn_info.ip_port.ip=ip;
// conn_info.ip_port.port=port;
send_info.new_src_ip = recv_info.new_dst_ip;
send_info.src_port = recv_info.dst_port;
send_info.dst_port = recv_info.src_port;
send_info.new_dst_ip = recv_info.new_src_ip;
if (lower_level) {
handle_lower_level(raw_info);
}
// id_t tmp_oppsite_id= ntohl(* ((u32_t *)&data[0]));
// mylog(log_info,"[%s]handshake1 received %x\n",ip_port,tmp_oppsite_id);
conn_info.my_id = get_true_random_number_nz();
mylog(log_info, "[%s]created new conn,state: server_handshake1,my_id is %x\n", ip_port, conn_info.my_id);
conn_info.state.server_current_state = server_handshake1;
conn_info.last_state_time = get_current_time();
server_on_raw_recv_handshake1(conn_info, ip_port, data, data_len);
return 0;
}
conn_info_t &conn_info = conn_manager.find_insert(addr); // insert if not exist
packet_info_t &send_info = conn_info.raw_info.send_info;
packet_info_t &recv_info = conn_info.raw_info.recv_info;
raw_info_t &raw_info = conn_info.raw_info;
if (conn_info.state.server_current_state == server_handshake1) {
if (recv_bare(raw_info, data, data_len) != 0) {
return -1;
}
return server_on_raw_recv_handshake1(conn_info, ip_port, data, data_len);
}
if (conn_info.state.server_current_state == server_ready) {
vector<char> type_vec;
vector<string> data_vec;
recv_safer_multi(conn_info, type_vec, data_vec);
if (data_vec.empty()) {
mylog(log_debug, "recv_safer failed!\n");
return -1;
}
for (int i = 0; i < (int)type_vec.size(); i++) {
char type = type_vec[i];
char *data = (char *)data_vec[i].c_str(); // be careful, do not append data to it
int data_len = data_vec[i].length();
server_on_raw_recv_ready(conn_info, ip_port, type, data, data_len);
}
return 0;
}
if (conn_info.state.server_current_state == server_idle) {
discard_raw_packet();
// recv(raw_recv_fd, 0,0, 0 );//
return 0;
}
mylog(log_fatal, "we should never run to here\n");
myexit(-1);
return -1;
}
int server_on_udp_recv(conn_info_t &conn_info, fd64_t fd64) {
char buf[buf_len];
if (conn_info.state.server_current_state != server_ready) // TODO remove this for peformance
{
mylog(log_fatal, "p_conn_info->state.server_current_state!=server_ready!!!this shouldnt happen\n");
myexit(-1);
}
// conn_info_t &conn_info=*p_conn_info;
assert(conn_info.blob->conv_manager.s.is_data_used(fd64));
u32_t conv_id = conn_info.blob->conv_manager.s.find_conv_by_data(fd64);
int fd = fd_manager.to_fd(fd64);
int recv_len = recv(fd, buf, max_data_len + 1, 0);
mylog(log_trace, "received a packet from udp_fd,len:%d\n", recv_len);
if (recv_len == max_data_len + 1) {
mylog(log_warn, "huge packet, data_len > %d,dropped\n", max_data_len);
return -1;
}
if (recv_len < 0) {
mylog(log_debug, "udp fd,recv_len<0 continue,%s\n", strerror(errno));
return -1;
}
if (recv_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 ", recv_len, mtu_warn);
}
// conn_info.conv_manager->update_active_time(conv_id); server dosnt update from upd side,only update from raw side. (client updates at both side)
if (conn_info.state.server_current_state == server_ready) {
send_data_safer(conn_info, buf, recv_len, conv_id);
// send_data(g_packet_info_send,buf,recv_len,my_id,oppsite_id,conv_id);
mylog(log_trace, "send_data_safer ,sent !!\n");
}
return 0;
}
int server_event_loop() {
char buf[buf_len];
int i, j, k;
int ret;
if (raw_ip_version == AF_INET) {
if (local_addr.inner.ipv4.sin_addr.s_addr != 0) {
bind_addr_used = 1;
bind_addr.v4 = local_addr.inner.ipv4.sin_addr.s_addr;
}
} else {
assert(raw_ip_version == AF_INET6);
char zero_arr[16] = {0};
if (memcmp(&local_addr.inner.ipv6.sin6_addr, zero_arr, 16) != 0) {
bind_addr_used = 1;
bind_addr.v6 = local_addr.inner.ipv6.sin6_addr;
}
}
// bind_address_uint32=local_ip_uint32;//only server has bind adress,client sets it to zero
if (lower_level) {
if (lower_level_manual) {
init_ifindex(if_name, raw_send_fd, ifindex);
mylog(log_info, "we are running at lower-level (manual) mode\n");
} else {
mylog(log_info, "we are running at lower-level (auto) mode\n");
}
}
if (raw_mode == mode_faketcp) {
bind_fd = socket(local_addr.get_type(), SOCK_STREAM, 0);
} else if (raw_mode == mode_udp || raw_mode == mode_icmp) // bind an adress to avoid collision,for icmp,there is no port,just bind a udp port
{
bind_fd = socket(local_addr.get_type(), SOCK_DGRAM, 0);
}
// struct sockaddr_in temp_bind_addr={0};
// bzero(&temp_bind_addr, sizeof(temp_bind_addr));
// temp_bind_addr.sin_family = AF_INET;
// temp_bind_addr.sin_port = local_addr.get_port();
// temp_bind_addr.sin_addr.s_addr = local_addr.inner.ipv4.sin_addr.s_addr;
if (bind(bind_fd, (struct sockaddr *)&local_addr.inner, local_addr.get_len()) != 0) {
mylog(log_fatal, "bind fail\n");
myexit(-1);
}
if (raw_mode == mode_faketcp) {
if (listen(bind_fd, SOMAXCONN) != 0) {
mylog(log_fatal, "listen fail\n");
myexit(-1);
}
}
// init_raw_socket();
init_filter(local_addr.get_port()); // bpf filter
epollfd = epoll_create1(0);
const int max_events = 4096;
struct epoll_event ev, events[max_events];
if (epollfd < 0) {
mylog(log_fatal, "epoll return %d\n", epollfd);
myexit(-1);
}
ev.events = EPOLLIN;
ev.data.u64 = raw_recv_fd;
ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, raw_recv_fd, &ev);
if (ret != 0) {
mylog(log_fatal, "add raw_fd error\n");
myexit(-1);
}
int timer_fd;
set_timer(epollfd, timer_fd);
u64_t begin_time = 0;
u64_t end_time = 0;
mylog(log_info, "now listening at %s\n", local_addr.get_str());
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(epollfd, 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);
}
while (1) ////////////////////////
{
if (about_to_exit) myexit(0);
int nfds = epoll_wait(epollfd, events, max_events, 180 * 1000);
if (nfds < 0) { // allow zero
if (errno == EINTR) {
mylog(log_info, "epoll interrupted by signal,continue\n");
// myexit(0);
} else {
mylog(log_fatal, "epoll_wait return %d,%s\n", nfds, strerror(errno));
myexit(-1);
}
}
int idx;
for (idx = 0; idx < nfds; ++idx) {
// mylog(log_debug,"ndfs: %d \n",nfds);
epoll_trigger_counter++;
// printf("%d %d %d %d\n",timer_fd,raw_recv_fd,raw_send_fd,n);
if ((events[idx].data.u64) == (u64_t)timer_fd) {
if (debug_flag) begin_time = get_current_time();
conn_manager.clear_inactive();
u64_t dummy;
int unused = read(timer_fd, &dummy, 8);
// current_time_rough=get_current_time();
if (debug_flag) {
end_time = get_current_time();
mylog(log_debug, "timer_fd,%llu,%llu,%llu\n", begin_time, end_time, end_time - begin_time);
}
mylog(log_trace, "epoll_trigger_counter: %d \n", epoll_trigger_counter);
epoll_trigger_counter = 0;
} else if (events[idx].data.u64 == (u64_t)raw_recv_fd) {
if (debug_flag) begin_time = get_current_time();
server_on_raw_recv_multi();
if (debug_flag) {
end_time = get_current_time();
mylog(log_debug, "raw_recv_fd,%llu,%llu,%llu \n", begin_time, end_time, end_time - begin_time);
}
} else if (events[idx].data.u64 == (u64_t)fifo_fd) {
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));
continue;
}
// assert(len>=0);
buf[len] = 0;
while (len >= 1 && buf[len - 1] == '\n')
buf[len - 1] = 0;
mylog(log_info, "got data from fifo,len=%d,s=[%s]\n", len, buf);
mylog(log_info, "unknown command\n");
} else if (events[idx].data.u64 > u32_t(-1)) {
fd64_t fd64 = events[idx].data.u64;
if (!fd_manager.exist(fd64)) {
mylog(log_trace, "fd64 no longer exist\n");
return -1;
}
assert(fd_manager.exist_info(fd64));
conn_info_t *p_conn_info = fd_manager.get_info(fd64).p_conn_info;
conn_info_t &conn_info = *p_conn_info;
if (fd64 == conn_info.timer_fd64) //////////timer_fd64
{
if (debug_flag) begin_time = get_current_time();
int fd = fd_manager.to_fd(fd64);
u64_t dummy;
int unused = read(fd, &dummy, 8);
assert(conn_info.state.server_current_state == server_ready); // TODO remove this for peformance
server_on_timer_multi(conn_info);
if (debug_flag) {
end_time = get_current_time();
mylog(log_debug, "(events[idx].data.u64 >>32u) == 2u ,%llu,%llu,%llu \n", begin_time, end_time, end_time - begin_time);
}
} else // udp_fd64
{
if (debug_flag) begin_time = get_current_time();
server_on_udp_recv(conn_info, fd64);
if (debug_flag) {
end_time = get_current_time();
mylog(log_debug, "(events[idx].data.u64 >>32u) == 1u,%lld,%lld,%lld \n", begin_time, end_time, end_time - begin_time);
}
}
} else {
mylog(log_fatal, "unknown fd,this should never happen\n");
myexit(-1);
}
}
}
return 0;
}
#endif
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