/**
* 只会在USR端被调用
*/
void accept_conn_cb(struct evconnlistener *listener,
evutil_socket_t fd, struct sockaddr *address, int socklen,
void *ctx)
{
P_PORTMAP p_map = (P_PORTMAP)ctx;
char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV];
getnameinfo (address, socklen,
hbuf, sizeof(hbuf),sbuf, sizeof(sbuf),
NI_NUMERICHOST | NI_NUMERICSERV);
st_print("WELCOME NEW CONNECT (HOST=%s, PORT=%s)\n", hbuf, sbuf);
/* We got a new connection! Set up a bufferevent for it. */
struct event_base *base = evconnlistener_get_base(listener);
int srv_fd = socket(AF_INET, SOCK_STREAM, 0);
if(sc_connect_srv(srv_fd) != RET_YES)
{
st_d_error("连接服务器失败！");
return;
}
P_PORTTRANS p_trans = sc_create_trans(atoi(sbuf));
if (!p_trans)
{
st_d_error("本地无空闲TRANS!");
return;
}
struct bufferevent *local_bev =
bufferevent_socket_new(base, fd, BEV_OPT_CLOSE_ON_FREE);
assert(local_bev);
bufferevent_setcb(local_bev, bufferread_cb, NULL, bufferevent_cb, p_trans);
//bufferevent_enable(local_bev, EV_READ|EV_WRITE);
struct bufferevent *srv_bev =
bufferevent_socket_new(base, srv_fd, BEV_OPT_CLOSE_ON_FREE);
assert(srv_bev);
bufferevent_setcb(srv_bev, bufferread_cb, NULL, bufferevent_cb, p_trans);
//bufferevent_enable(srv_bev, EV_READ|EV_WRITE);
p_trans->is_enc = 0;
p_trans->l_port = atoi(sbuf);
p_trans->local_bev = local_bev;
p_trans->srv_bev = srv_bev;
st_d_print("DDDDD: 当前活动连接数：[[[ %d ]]]",
slist_count(&cltopt.trans));
/* 向服务器报告连接请求 */
CTL_HEAD ret_head;
memset(&ret_head, 0, CTL_HEAD_LEN);
ret_head.cmd = HD_CMD_CONN;
ret_head.daemonport = p_map->daemonport;
ret_head.usrport = p_map->usrport;
ret_head.extra_param = atoi(sbuf);
ret_head.mach_uuid = cltopt.session_uuid;
ret_head.direct = USR_DAEMON;
bufferevent_write(srv_bev, &ret_head, CTL_HEAD_LEN);
st_d_print("客户端创建BEV OK！");
/**
* 有些服务是conn连接之后，服务端先发消息，然后客户端再进行响应的，所以
* 为了避免这种情况，客户端接收到conn消息之后，需要先向DAEMON端发送一个控制
* 消息，打通DAEMON端的数据传输接口
*/
return;
}
int main(int argc, char* argv[])
{
#if 1
// For debug with segment fault
struct sigaction sa;
sa.sa_handler = backtrace_info;
sigaction(SIGSEGV, &sa, NULL);
// ignore SIGPIPE
signal(SIGPIPE, SIG_IGN);
signal(SIGCHLD, SIG_IGN);
signal(SIGABRT, SIG_IGN);
#endif
int opt_g = 0;
memset(&cltopt, 0, sizeof(CLT_OPT));
cltopt.C_TYPE = C_USR;
while( (opt_g = getopt(argc, argv, "Dh")) != -1 )
{
switch(opt_g)
{
case 'D':
cltopt.C_TYPE = C_DAEMON;
break;
case 'h':
default:
usage();
exit(EXIT_SUCCESS);
}
}
if(load_settings_client(&cltopt) == RET_NO)
{
st_d_error("加载配置文件settings.json出错！");
exit(EXIT_FAILURE);
}
OpenSSL_add_ssl_algorithms();
SSL_load_error_strings();
SSL_library_init(); //SSL_library_init() always returns "1"
//int sd_id128_from_string(const char *s, sd_id128_t *ret);
sd_id128_get_machine(&cltopt.mach_uuid);
gethostname(cltopt.hostname, sizeof(cltopt.hostname));
st_d_print("CURRENT MACH_ID:%s, HOSTNAME:%s", SD_ID128_CONST_STR(cltopt.mach_uuid),
cltopt.hostname);
if (cltopt.C_TYPE == C_DAEMON)
{
cltopt.session_uuid = cltopt.mach_uuid;
st_d_print("PLEASE REMEMEBER SET MACH_ID FOR USER TYPE!");
}
dump_clt_opts(&cltopt);
/*带配置产生event_base对象*/
struct event_config *cfg;
cfg = event_config_new();
event_config_avoid_method(cfg, "select"); //避免使用select
event_config_require_features(cfg, EV_FEATURE_ET); //使用边沿触发类型
base = event_base_new_with_config(cfg);
event_config_free(cfg);
st_d_print("当前复用Event模式: %s", event_base_get_method(base)); // epoll
/*连接服务器*/
int srv_fd = socket(AF_INET, SOCK_STREAM, 0);
unsigned int optval = 1;
setsockopt(srv_fd, IPPROTO_TCP, TCP_NODELAY, &optval, sizeof(optval));//禁用NAGLE算法
if(sc_connect_srv(srv_fd) != RET_YES)
{
SYS_ABORT("连接服务器失败！");
}
if(cltopt.C_TYPE == C_DAEMON)
{
if (sc_daemon_init_srv(srv_fd) != RET_YES)
SYS_ABORT("(Daemon) 服务器返回错误！");
}
else
{
if (sc_usr_init_srv(srv_fd) != RET_YES)
SYS_ABORT("(Usr) 服务器返回错误！");
}
st_d_print("客户端连接服务器OK！");
/**
* USR 建立本地Listen侦听套接字
*/
if (cltopt.C_TYPE == C_USR)
{
int i = 0;
for (i=0; i<MAX_PORT_NUM; i++)
{
if (cltopt.maps[i].usrport)
{
struct evconnlistener *listener;
struct sockaddr_in sin;
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = htonl(0);
sin.sin_port = htons(cltopt.maps[i].usrport); /* Port Num */
listener = evconnlistener_new_bind(base, accept_conn_cb, &cltopt.maps[i],
LEV_OPT_CLOSE_ON_FREE|LEV_OPT_REUSEABLE, -1/*backlog 连接无限制*/,
(struct sockaddr*)&sin, sizeof(sin));
if (!listener)
{
st_d_error("[USR]创建侦听套接字失败 %d:%d",
cltopt.maps[i].usrport, cltopt.maps[i].daemonport);
continue;
}
evconnlistener_set_error_cb(listener, accept_error_cb);
st_d_print("[USR]创建侦听套接字 %d:%d OK",
cltopt.maps[i].usrport, cltopt.maps[i].daemonport);
}
else
break;
}
}
encrypt_init(SD_ID128_CONST_STR(cltopt.mach_uuid), cltopt.enc_key);
if (cltopt.C_TYPE == C_DAEMON && cltopt.ss5_port )
{
/**
* 目前只考虑将sockets5代理使用线程池来处理，其它的端口暴露
* 基本都是长连接，不单独处理
*/
cltopt.thread_num = 5;
cltopt.main_thread_id = pthread_self();
cltopt.thread_objs = (P_THREAD_OBJ)calloc(sizeof(THREAD_OBJ), cltopt.thread_num);
if (!cltopt.thread_objs)
{
SYS_ABORT("申请THREAD_OBJ出错");
}
sc_create_ss5_worker_threads(cltopt.thread_num, cltopt.thread_objs);
st_d_print("[DAEMON]创建sockets5代理端口：%d", cltopt.ss5_port);
struct evconnlistener *listener;
struct sockaddr_in sin;
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = htonl(0);
sin.sin_port = htons(cltopt.ss5_port); /* Port Num */
listener = evconnlistener_new_bind(base, ss5_accept_conn_cb, NULL,
LEV_OPT_LEAVE_SOCKETS_BLOCKING/* 阻塞 */|LEV_OPT_CLOSE_ON_FREE|LEV_OPT_REUSEABLE,
-1/*backlog 连接无限制*/,
(struct sockaddr*)&sin, sizeof(sin));
if (!listener)
{
st_d_error("[DAEMON]sockets5代理创建侦听套接字失败 %d", cltopt.ss5_port);
exit(EXIT_FAILURE);
}
evconnlistener_set_error_cb(listener, accept_error_cb);
st_d_print("[DAEMON]sockets5代理创建侦听套接字OK %d", cltopt.ss5_port);
}
if (cltopt.C_TYPE == C_DAEMON && cltopt.dns_port)
{
st_d_print("[DAEMON]创建DNS代理端口：%d", cltopt.dns_port);
if (cltopt.dns_port != 53)
{
st_d_print("[DAEMON]请注意标准DNS侦听#53端口！");
}
int dns_socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (dns_socket < 0 )
{
st_d_error("Create DNS socket error!");
exit(EXIT_FAILURE);
}
unsigned int optval = 1;
setsockopt(dns_socket, IPPROTO_TCP, TCP_NODELAY, &optval, sizeof(optval));//禁用NAGLE算法
setsockopt(dns_socket, SOL_SOCKET, SO_REUSEPORT, &optval, sizeof(optval));
evutil_make_socket_closeonexec(dns_socket);
evutil_make_socket_nonblocking(dns_socket);
struct sockaddr_in sin;
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = htonl(0);
sin.sin_port = htons(cltopt.dns_port); /* Port Num */
if (bind(dns_socket, (struct sockaddr *)&sin, sizeof(sin)))
{
st_d_error("Bind DNS socket error!");
exit(EXIT_FAILURE);
}
cltopt.dns_transid_port_map = (unsigned short*)malloc(sizeof(unsigned short) * 0xFFFF);
if (!cltopt.dns_transid_port_map)
{
st_d_error("Malloc for requestid-port failed!");
exit(EXIT_FAILURE);
}
P_PORTTRANS p_trans = sc_create_trans(cltopt.dns_port);
if (!p_trans)
{
st_d_error("本地无空闲TRANS!");
exit(EXIT_FAILURE);
}
p_trans->is_enc = 1;
p_trans->l_port = cltopt.dns_port;
encrypt_ctx_init(&p_trans->ctx_enc, p_trans->l_port, cltopt.enc_key, 1);
encrypt_ctx_init(&p_trans->ctx_dec, p_trans->l_port, cltopt.enc_key, 0);
// 建立DNS UDP事件侦听
p_trans->extra_ev = event_new(base, dns_socket, EV_READ | EV_PERSIST,
dns_client_to_proxy_cb, p_trans);
int dns_srv_fd = socket(AF_INET, SOCK_STREAM, 0);
if(sc_connect_srv(dns_srv_fd) != RET_YES)
{
SYS_ABORT("连接服务器失败！");
}
sc_daemon_dns_init_srv(dns_srv_fd, p_trans->l_port, 12333);
evutil_make_socket_nonblocking(dns_srv_fd);
// later enabled
//event_add(p_trans->extra_ev, NULL) != 0);
p_trans->srv_bev = bufferevent_socket_new(base, dns_srv_fd, BEV_OPT_CLOSE_ON_FREE);
bufferevent_setcb(p_trans->srv_bev, dns_bufferread_cb_enc, NULL, dns_bufferevent_cb, p_trans);
st_d_print("[DAEMON]DNS代理创建侦听套接字OK %d", cltopt.dns_port);
}
sc_set_eventcb_srv(srv_fd, base);
/**
* Main Loop Here
*/
event_base_loop(base, 0);
event_base_free(base);
st_d_print("程序退出！！！！");
return 0;
}
/**
* 客户端和远程服务器的交互
*/
void srv_bufferread_cb(struct bufferevent *bev, void *ptr)
{
size_t n = 0;
CTL_HEAD head;
struct evbuffer *input = bufferevent_get_input(bev);
struct evbuffer *output = bufferevent_get_output(bev);
if ( evbuffer_remove(input, &head, CTL_HEAD_LEN) != CTL_HEAD_LEN)
{
st_d_print("读取数据包头%d错误!", CTL_HEAD_LEN);
return;
}
if (!sd_id128_equal(head.mach_uuid, cltopt.session_uuid))
{
SYS_ABORT("服务端返回UUID校验失败：%s-%s",
SD_ID128_CONST_STR(head.mach_uuid), SD_ID128_CONST_STR(cltopt.session_uuid));
}
if (head.cmd == HD_CMD_ERROR)
{
st_d_error("SERVER RETURNED ERROR!");
exit(EXIT_SUCCESS);
}
if (head.cmd == HD_CMD_CONN_ACT)
{
P_PORTTRANS p_trans = sc_find_trans(head.extra_param);
if (!p_trans)
{
SYS_ABORT("本地未找到连接信息：%d", head.extra_param);
}
bufferevent_enable(p_trans->local_bev, EV_READ|EV_WRITE);
bufferevent_enable(p_trans->srv_bev, EV_READ|EV_WRITE);
st_d_print("开始传输数据：%d", head.extra_param);
}
if (head.cmd == HD_CMD_END_TRANS)
{
P_PORTTRANS p_trans = sc_find_trans(head.extra_param);
if (p_trans)
{
st_d_print("EXTRA CLOSE TRANS: %d", head.extra_param);
sc_free_trans(p_trans);
}
}
if (head.cmd == HD_CMD_SS5_ACT)
{
// OK，返回给本地程序告知可以开始传输了
// 这个绑定地址目前还没利用，主要是需要FTP这类需要带外传输另外连接端口的
char ret_msg[10] = "\x05\x00\x00\x01\x00\x00\x00\x00\x10\x10";
P_PORTTRANS p_trans = sc_find_trans(head.extra_param);
if (!p_trans)
{
SYS_ABORT("本地SS5未找到连接信息：%d", head.extra_param);
}
bufferevent_enable(p_trans->local_bev, EV_READ|EV_WRITE);
bufferevent_enable(p_trans->srv_bev, EV_READ|EV_WRITE);
bufferevent_write(p_trans->local_bev, ret_msg, sizeof(ret_msg));
st_d_print("SS5准备传输数据：%d", head.extra_param);
return;
}
if (head.cmd == HD_CMD_CONN)
{
assert(cltopt.C_TYPE == C_DAEMON);
if (cltopt.C_TYPE == C_DAEMON)
{
sc_find_daemon_portmap(head.daemonport, 1);
P_PORTTRANS p_trans = sc_create_trans(head.extra_param);
p_trans->is_enc = 0;
if (!p_trans)
{
st_d_error("本地无空闲TRANS!");
return;
}
/*建立本地连接*/
int local_fd = socket(AF_INET, SOCK_STREAM, 0);
int reuseaddr_on = 1;
if (setsockopt(local_fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr_on,
sizeof(reuseaddr_on)) == -1)
{
st_d_error("Reuse socket opt faile!\n");
return;
}
struct sockaddr_in local_srv;
local_srv.sin_family = AF_INET;
local_srv.sin_addr.s_addr = inet_addr("127.0.0.1");
local_srv.sin_port = htons(head.daemonport);
if (connect(local_fd, (struct sockaddr *)&local_srv, sizeof(local_srv)))
{
st_d_error("连接本地端口%d失败！", head.daemonport);
return;
}
else
{
st_d_print("连接本地端口%d OK！", head.daemonport);
}
/*建立服务器连接*/
int srv_fd = socket(AF_INET, SOCK_STREAM, 0);
if(sc_connect_srv(srv_fd) != RET_YES)
{
st_d_error("连接服务器失败！");
return;
}
struct event_base *base = bufferevent_get_base(bev);
evutil_make_socket_nonblocking(local_fd);
struct bufferevent *local_bev =
bufferevent_socket_new(base, local_fd, BEV_OPT_CLOSE_ON_FREE);
bufferevent_setcb(local_bev, bufferread_cb, NULL, bufferevent_cb, p_trans);
//bufferevent_enable(local_bev, EV_READ|EV_WRITE);
evutil_make_socket_nonblocking(srv_fd);
struct bufferevent *srv_bev =
bufferevent_socket_new(base, srv_fd, BEV_OPT_CLOSE_ON_FREE);
bufferevent_setcb(srv_bev, bufferread_cb, NULL, bufferevent_cb, p_trans);
//bufferevent_enable(srv_bev, EV_READ|EV_WRITE);
p_trans->l_port = head.extra_param;
p_trans->local_bev = local_bev;
p_trans->srv_bev = srv_bev;
/* 向服务器报告连接请求 */
// 必须要发送CONN包，触发这个连接转移到线程池处理
CTL_HEAD ret_head;
memset(&ret_head, 0, CTL_HEAD_LEN);
ret_head.cmd = HD_CMD_CONN;
ret_head.extra_param = p_trans->l_port;
ret_head.mach_uuid = cltopt.session_uuid;
ret_head.direct = DAEMON_USR;
bufferevent_write(srv_bev, &ret_head, CTL_HEAD_LEN);
st_d_print("DAEMON端准备OK!");
}
}
}
