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control.c
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control.c
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/* vim: set et ts=4 sts=4 sw=4 : */
/********************************************************************\
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License as *
* published by the Free Software Foundation; either version 2 of *
* the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License*
* along with this program; if not, contact: *
* *
* Free Software Foundation Voice: +1-617-542-5942 *
* 59 Temple Place - Suite 330 Fax: +1-617-542-2652 *
* Boston, MA 02111-1307, USA [email protected] *
* *
\********************************************************************/
/** @file control.c
@brief xfrp control protocol implemented
@author Copyright (C) 2016 Dengfeng Liu <[email protected]>
*/
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <assert.h>
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <json-c/json.h>
#include <syslog.h>
#include <event2/bufferevent.h>
#include <event2/buffer.h>
#include <event2/listener.h>
#include <event2/util.h>
#include <event2/event.h>
#include <event2/dns.h>
#include <event2/event_struct.h>
#include "debug.h"
#include "client.h"
#include "uthash.h"
#include "config.h"
#include "const.h"
#include "msg.h"
#include "control.h"
#include "uthash.h"
#include "frame.h"
#include "crypto.h"
#include "utils.h"
#include "session.h"
#include "common.h"
#include "login.h"
static struct control *main_ctl;
static int clients_conn_signel = 0;
static void sync_new_work_connection(struct bufferevent *bev);
static void recv_cb(struct bufferevent *bev, void *ctx);
static int is_client_connected()
{
return clients_conn_signel;
}
static int client_connected(int is_connected)
{
if (is_connected)
clients_conn_signel = 1;
else
clients_conn_signel = 0;
return clients_conn_signel;
}
static int set_client_work_start(struct proxy_client *client, int is_start_work)
{
if (is_start_work) {
assert(client->ps);
client->work_started = 1;
}else
client->work_started = 0;
return client->work_started;
}
static int is_client_work_started(struct proxy_client *client) {
return client->work_started && client->ps;
}
static void client_start_event_cb(struct bufferevent *bev, short what, void *ctx)
{
struct proxy_client *client = ctx;
assert(client);
struct common_conf *c_conf = get_common_config();
if (what & (BEV_EVENT_EOF|BEV_EVENT_ERROR)) {
if (client->ctl_bev != bev) {
debug(LOG_ERR, "Error: should be equal");
bufferevent_free(client->ctl_bev);
client->ctl_bev = NULL;
}
debug(LOG_ERR, "Proxy connect server [%s:%d] error", c_conf->server_addr, c_conf->server_port);
bufferevent_free(bev);
free_proxy_client(client);
} else if (what & BEV_EVENT_CONNECTED) {
bufferevent_setcb(bev, recv_cb, NULL, client_start_event_cb, client);
bufferevent_enable(bev, EV_READ|EV_WRITE);
sync_new_work_connection(bev);
debug(LOG_INFO, "proxy service start");
}
}
static void new_client_connect()
{
struct proxy_client *client = new_proxy_client();
struct common_conf *c_conf = get_common_config();
assert(c_conf);
client->base = main_ctl->connect_base;
struct bufferevent *bev = connect_server(client->base, c_conf->server_addr, c_conf->server_port);
if (!bev) {
debug(LOG_DEBUG, "Connect server [%s:%d] failed", c_conf->server_addr, c_conf->server_port);
return;
}
debug(LOG_INFO, "work connection: connect server [%s:%d] ......", c_conf->server_addr, c_conf->server_port);
client->ctl_bev = bev;
bufferevent_enable(bev, EV_WRITE);
bufferevent_setcb(bev, NULL, NULL, client_start_event_cb, client);
}
static void start_proxy_services()
{
struct proxy_service *all_ps = get_all_proxy_services();
assert(all_ps);
struct proxy_service *ps = NULL, *tmp = NULL;
debug(LOG_INFO, "Start xfrp proxy services ...");
HASH_ITER(hh, all_ps, ps, tmp) {
if(ps == NULL) {
debug(LOG_ERR, "proxy service is invalid!");
return;
}
send_new_proxy(ps);
}
}
#ifdef USEENCRYPTION
static void init_msg_writer()
{
if (! is_encoder_inited()) {
struct frp_coder * e = init_main_encoder();
if (e)
sync_iv(e->iv);
}
}
static void init_msg_reader(unsigned char *iv)
{
if (! is_decoder_inited()) {
struct frp_coder *d = init_main_decoder(iv);
if (!d) {
debug(LOG_DEBUG, "reader init faild!");
}
}
}
#endif // USEENCRYPTION
static size_t request(struct bufferevent *bev, struct frame *f)
{
size_t write_len = 0;
struct bufferevent *bout = NULL;
if (bev) {
bout = bev;
} else {
bout = main_ctl->connect_bev;
}
if ( ! bout)
return 0;
struct common_conf *c = get_common_config();
if ( ! c)
return 0;
write_len = (size_t)f->len;
if ( 0 == write_len)
return 0;
bufferevent_write(bout, f->data, write_len);
return write_len;
}
static void base_control_ping(struct bufferevent *bev) {
if ( ! is_client_connected())
return;
struct bufferevent *bout = NULL;
if (bev) {
bout = bev;
} else {
bout = main_ctl->connect_bev;
}
if ( ! bout) {
debug(LOG_ERR, "bufferevent is not legal!");
return;
}
struct frame *f = new_frame(cmdNOP, 0); //ping sid is 0
assert(f);
request(bout, f);
free_frame(f);
}
static void ping(struct bufferevent *bev)
{
struct bufferevent *bout = NULL;
if (bev) {
bout = bev;
} else {
bout = main_ctl->connect_bev;
}
if ( ! bout) {
debug(LOG_ERR, "bufferevent is not legal!");
return;
}
/* tcp-mux using frame */
if (get_common_config()->tcp_mux) {
struct frame *f = new_frame(cmdNOP, 0); //ping sid is 0
assert(f);
request(bout, f);
free_frame(f);
}
uint32_t sid = get_main_control()->session_id;
char *ping_msg = "{}";
send_msg_frp_server(bev, TypePing, ping_msg, strlen(ping_msg), sid);
}
static void pong(struct bufferevent *bev, struct frame *f)
{
struct bufferevent *bout = NULL;
if (bev) {
bout = bev;
} else {
bout = main_ctl->connect_bev;
}
if ( ! bout) {
debug(LOG_ERR, "bufferevent is not legal!");
return;
}
uint32_t sid = 0;
if (!f || f->sid == 0)
sid = get_main_control()->session_id;
else
sid = f->sid;
char *pong_msg = "{}";
send_msg_frp_server(bev, TypePong, pong_msg, strlen(pong_msg), sid);
}
static void sync_new_work_connection(struct bufferevent *bev)
{
struct bufferevent *bout = NULL;
if (bev) {
bout = bev;
} else {
bout = main_ctl->connect_bev;
}
if ( ! bout) {
debug(LOG_ERR, "bufferevent is not legal!");
return;
}
/* send new work session regist request to frps*/
uint32_t sid = 5;
struct frame *f = new_frame(cmdSYN, sid);
assert(f);
struct work_conn *work_c = new_work_conn();
assert(work_c);
work_c->run_id = get_run_id();
if (! work_c->run_id) {
debug(LOG_ERR, "cannot found run ID, it should inited when login!");
SAFE_FREE(work_c);
return;
}
char *new_work_conn_request_message = NULL;
int nret = new_work_conn_marshal(work_c, &new_work_conn_request_message);
if (0 == nret) {
debug(LOG_ERR, "new work connection request run_id marshal failed!");
return;
}
send_msg_frp_server(bev, TypeNewWorkConn, new_work_conn_request_message, nret, f->sid);
request(bout, f);
free_frame(f);
SAFE_FREE(work_c);
}
struct bufferevent *
connect_server(struct event_base *base, const char *name, const int port)
{
struct bufferevent *bev = bufferevent_socket_new(base, -1, BEV_OPT_CLOSE_ON_FREE);
assert(bev);
if (bufferevent_socket_connect_hostname(bev,
main_ctl->dnsbase,
AF_INET,
name,
port) < 0 ) {
bufferevent_free(bev);
return NULL;
}
return bev;
}
static void set_ticker_ping_timer(struct event *timeout)
{
struct timeval tv;
struct common_conf *c_conf = get_common_config();
evutil_timerclear(&tv);
tv.tv_sec = c_conf->heartbeat_interval;
event_add(timeout, &tv);
}
static void hb_sender_cb(evutil_socket_t fd, short event, void *arg)
{
base_control_ping(NULL);
if (is_client_connected())
ping(NULL);
set_ticker_ping_timer(main_ctl->ticker_ping);
}
// return: 0: raw succeed 1: raw failed
static int proxy_service_resp_raw(struct new_proxy_response *npr)
{
if (npr->error && strlen(npr->error) > 2) {
debug(LOG_ERR, "error: new proxy response error_field:%s", npr->error);
return 1;
}
if ((! npr->proxy_name) || (strlen(npr->proxy_name) <= 0)) {
debug(LOG_ERR, "error: new proxy response proxy name unmarshal failed!");
return 1;
}
struct proxy_service *ps = NULL;
ps = get_proxy_service(npr->proxy_name);
if (! ps) {
debug(LOG_ERR, "error: proxy_name responsed by TypeNewProxyResp not found!");
return 1;
}
if (! ps->proxy_type) {
debug(LOG_ERR, "error: proxy_type is NULL, it should be never happend!");
return 1;
}
if (ps->ftp_cfg_proxy_name) {
struct proxy_service *main_ps = get_proxy_service(ps->ftp_cfg_proxy_name);
if (main_ps) {
debug(LOG_DEBUG, "find main ftp proxy service name [%s]", main_ps->proxy_name);
} else {
debug(LOG_ERR, "error: cannot find main ftp proxy service!");
return 1;
}
if (npr->remote_port <= 0) {
debug(LOG_ERR, "error: ftp remote_data_port [%d] that request from server is invalid!", npr->remote_port);
return 1;
}
main_ps->remote_data_port = npr->remote_port;
}
return 0;
}
static void
raw_message(struct message *msg, struct bufferevent *bev, struct proxy_client *client)
{
if (client) {
if (client->work_started) {
debug(LOG_DEBUG, "raw client [%s] control message.", client->ps->proxy_name);
}
}
struct start_work_conn_resp *sr = NULL; //used in TypeStartWorkConn
switch(msg->type) {
case TypeLoginResp:
if (msg->data_p == NULL) {
debug(LOG_ERR,
"recved TypeLoginResp but no data, it should be never happend!");
break;
}
struct login_resp *lr = login_resp_unmarshal(msg->data_p);
if (lr == NULL) {
debug(LOG_ERR, "login response buffer init faild!");
return;
}
int is_logged = login_resp_check(lr);
#ifdef USEENCRYPTION
if (is_logged) {
init_msg_writer();
}
#endif // USEENCRYPTION
if ( ! is_logged) {
debug(LOG_ERR, "xfrp login failed, try again!");
login();
SAFE_FREE(lr);
return;
}
SAFE_FREE(lr);
break;
case TypeReqWorkConn:
if (! is_client_connected()) {
start_proxy_services();
client_connected(1);
ping(bev);
}
new_client_connect();
break;
case TypeNewProxyResp:
{
if (msg->data_p == NULL) {
debug(LOG_ERR,
"recved TypeNewProxyResp but no data, it should be never happend!");
break;
}
struct new_proxy_response *npr = new_proxy_resp_unmarshal(msg->data_p);
if (npr == NULL) {
debug(LOG_ERR, "new proxy response buffer unmarshal faild!");
return;
}
proxy_service_resp_raw(npr);
SAFE_FREE(npr);
break;
}
case TypeStartWorkConn:
sr = start_work_conn_resp_unmarshal(msg->data_p);
if (! sr) {
debug(LOG_ERR,
"TypeStartWorkConn unmarshal failed, it should never be happend!");
break;
}
struct proxy_service *ps = get_proxy_service(sr->proxy_name);
if (! ps) {
debug(LOG_ERR,
"TypeStartWorkConn requested proxy service [%s] not found, it should nerver be happend!",
sr->proxy_name);
break;
}
client->ps = ps;
debug(LOG_INFO,
"proxy service [%s] [%s:%d] start work connection.",
sr->proxy_name,
ps->local_ip,
ps->local_port);
start_xfrp_tunnel(client);
set_client_work_start(client, 1);
break;
case TypePong:
pong(bev, NULL);
break;
default:
break;
}
SAFE_FREE(sr);
}
static size_t data_handler(unsigned char *buf, ushort len, struct proxy_client *client)
{
struct bufferevent *bev = NULL;
if (client) {
debug(LOG_DEBUG, "client(%s): recved control data",
is_client_work_started(client)?"work":"free");
bev = client->ctl_bev;
}
unsigned char *ret_buf = NULL;
struct frame *f = NULL;
#ifdef RECV_DEBUG
/* debug showing */
unsigned int j = 0;
debug(LOG_DEBUG, "RECV from frps:");
printf("[");
for(j = 0; j<len; j++) {
printf("%d ", (unsigned char)buf[j]);
}
printf("]\n");
/* debug show over */
#endif // RECV_DEBUG
int min_buf_len = 0;
if (get_common_config()->tcp_mux) {
f = raw_frame(buf, len);
min_buf_len = get_header_size();
} else {
f = raw_frame_only_msg(buf, len);
set_frame_cmd(f, cmdPSH);
}
if (f == NULL) {
debug(LOG_ERR, "raw_frame faild!");
goto DATA_H_END;
}
#ifdef USEENCRYPTION
if (! is_decoder_inited() && f->len == get_block_size()) {
init_msg_reader((unsigned char *)f->data);
debug(LOG_DEBUG, "first recv stream message, init decoder iv succeed!");
goto DATA_H_END;
}
#endif // USEENCRYPTION
if (len <= min_buf_len) {
if (f->cmd == 3) {
base_control_ping(bev);
}
goto DATA_H_END;
}
#ifdef ENCRYPTO
size_t ret_len3 = encrypt_data(f->data, (size_t)f->len, get_main_encoder(), &ret_buf);
if (ret_len3 <= 0) {
debug(LOG_ERR, "message recved decrypt result is 0 bit");
goto DATA_H_END;
}
debug(LOG_DEBUG, "message after test1:");
for(i=0; i<ret_len3; i++) {
printf("%u ", (unsigned char)ret_buf[i]);
}
printf("\n");
size_t ret_len2 = decrypt_data(f->data, (size_t)f->len, get_main_encoder(), &ret_buf);
debug(LOG_DEBUG, "message after test2:");
if (ret_len2 <= 0) {
debug(LOG_ERR, "message recved decrypt result is 0 bit");
goto DATA_H_END;
}
for(i=0; i<ret_len2; i++) {
printf("%u ", (unsigned char)ret_buf[i]);
}
printf("\n");
size_t ret_len1 = encrypt_data(f->data, (size_t)f->len, get_main_decoder(), &ret_buf);
if (ret_len1 <= 0) {
debug(LOG_ERR, "message recved decrypt result is 0 bit");
goto DATA_H_END;
}
debug(LOG_DEBUG, "message after test3:");
for(i=0; i<f->len; i++) {
printf("%u ", (unsigned char)ret_buf[i]);
}
printf("\n encrypto test end \n");
struct frp_coder *d = get_main_decoder();
if (! d) {
debug(LOG_ERR, "decoder (message reader) is not inited!");
goto DATA_H_END;
}
size_t ret_len = decrypt_data(f->data, (size_t)f->len, d, &ret_buf);
if (ret_len <= 0) {
debug(LOG_ERR, "message recved decrypt result is 0 bit");
goto DATA_H_END;
}
debug(LOG_DEBUG, "message after decode:");
for(i=0; i<f->len; i++) {
printf("%u ", (unsigned char)ret_buf[i]);
}
printf("\n\n");
#endif // ENCRYPTO
if (! ret_buf)
ret_buf = f->data; //test: no crypto
struct message *msg = NULL;
switch(f->cmd) {
case cmdNOP: //3 no options
break;
case cmdSYN: //0 create a new session
break;
case cmdFIN: //1 close session
break;
case cmdPSH: //2
msg = unpack(ret_buf, f->len);
if ( ! (msg && msg->data_p)) {
debug(LOG_ERR, "message received format invalid");
goto DATA_H_END;
}
debug(LOG_DEBUG, "recv <---- %c: %s", msg->type, msg->data_p);
if (msg->data_p == NULL)
goto DATA_H_END;
raw_message(msg, bev, client);
break;
default:
break;
}
SAFE_FREE(msg);
DATA_H_END:
free_frame(f);
return len;
}
// ctx: if recv_cb was called by common control, ctx is NULL
// when ctx is not NULL it was called by client struct
static unsigned char
*multy_recv_buffer_raw(unsigned char *buf, size_t buf_len, size_t *ret_len, void *ctx)
{
unsigned char *unraw_buf_p = NULL;
unsigned char *raw_buf = NULL;
size_t split_lv = sizeof(msg_size_t); // latest buffer split level
size_t split_len = 0;
size_t raw_static_size = 1 + sizeof(msg_size_t); //type 1 + bigend 8
int splited = 0; // signal argument, ==1 after buffer split
*ret_len = 0;
if (ctx) {
struct proxy_client *client = (struct proxy_client *)ctx;
if (is_client_work_started(client)) {
debug(LOG_DEBUG,
"client [%s] send all work data to proxy tunnel.",
client->ps->proxy_name);
return NULL;
}
}
for(;;) {
if (buf_len > split_lv) {
if (! is_logged()) {
if (buf[0] == 49) {
msg_size_t data_len_bigend;
data_len_bigend = *(msg_size_t *)(buf + MSG_LEN_I);
msg_size_t data_len = msg_ntoh(data_len_bigend);
split_len = raw_static_size + data_len;
splited = 1;
break;
}
}
#ifdef USEENCRYPTION
if (! is_decoder_inited()) {
raw_static_size = get_block_size();
if (buf_len < raw_static_size) {
break;
}
debug(LOG_DEBUG, "mulity raw decoder IV...");
split_len = raw_static_size;
splited = 1;
break;
}
#endif // USEENCRYPTION
if (! splited) { //ordinary message split
char msg_type = buf[0];
int type_valid = msg_type_valid_check(msg_type);
if (type_valid) {
msg_size_t data_len_bigend;
data_len_bigend = *(msg_size_t *)(buf + MSG_LEN_I);
msg_size_t data_len = msg_ntoh(data_len_bigend);
split_len = raw_static_size + data_len;
splited = 1;
} else {
debug(LOG_ERR, "buffer type [%c] raw failed!", msg_type);
}
break;
}
}
break;
}
if (! splited) {
data_handler(buf, buf_len, ctx);
*ret_len = 0;
return NULL;
} else if (split_len){
raw_buf =calloc(1, split_len);
assert(raw_buf);
memcpy(raw_buf, buf, split_len);
}
if (split_len != 0 && raw_buf != NULL){
data_handler(raw_buf, split_len, ctx);
free(raw_buf);
*ret_len = buf_len - split_len;
if (split_len < buf_len) {
unraw_buf_p = buf+ split_len;
}
}
return unraw_buf_p;
}
// ctx: if recv_cb was called by common control, ctx == NULL
// else ctx == client struct
static void recv_cb(struct bufferevent *bev, void *ctx)
{
struct evbuffer *input = bufferevent_get_input(bev);
int len = evbuffer_get_length(input);
if (len < 0) {
return;
}
unsigned char *buf = calloc(1, len);
assert(buf);
size_t read_n = 0;
size_t ret_len = 0;
read_n = evbuffer_remove(input, buf, len);
struct proxy_client *client = (struct proxy_client *)ctx;
if (read_n) {
unsigned char *raw_buf_p = buf;
for( ; raw_buf_p && read_n ; ) {
// #define CONN_DEBUG 1
#ifdef CONN_DEBUG
unsigned int i = 0;
char *dbg_buf = calloc(1, read_n * 4 + 1);
assert(dbg_buf);
for(i = 0; i<read_n && ((2 * i) < (read_n * 2 + 1)); i++) {
snprintf(dbg_buf + 4*i, 5, "%3u ", (unsigned char)raw_buf_p[i]);
}
debug(LOG_DEBUG, "[%s]: RECV ctl byte:%s", client?"client":"control", dbg_buf);
SAFE_FREE(dbg_buf);
#endif //CONN_DEBUG
raw_buf_p = multy_recv_buffer_raw(raw_buf_p, read_n, &ret_len, client);
read_n = ret_len;
if (ctx &&
is_client_work_started(client) &&
raw_buf_p &&
ret_len) {
debug(LOG_WARNING, "warning: data recved from frps is not split clear");
unsigned char *dtail = calloc(1, read_n);
assert(dtail);
memcpy(dtail, raw_buf_p, read_n);
client->data_tail = dtail;
client->data_tail_size = ret_len;
send_client_data_tail(client);
SAFE_FREE(dtail);
client->data_tail = NULL;
client->data_tail_size = 0;
}
}
} else {
debug(LOG_DEBUG, "recved message but evbuffer_remove faild!");
}
SAFE_FREE(buf);
return;
}
static void open_connection_session(struct bufferevent *bev)
{
struct frame *f = new_frame(cmdSYN, main_ctl->session_id);
assert(f);
request(bev, f);
free_frame(f);
}
static void connect_event_cb (struct bufferevent *bev, short what, void *ctx)
{
struct common_conf *c_conf = get_common_config();
static int retry_times = 0;
if (what & (BEV_EVENT_EOF|BEV_EVENT_ERROR)) {
if (retry_times >= 10) { // only try 10 times consecutively
debug(LOG_ERR,
"have retry connect to xfrp server for %d times, exit!",
retry_times);
exit(0);
}
retry_times++;
debug(LOG_ERR, "error: connect server [%s:%d] failed",
c_conf->server_addr,
c_conf->server_port);
free_control();
init_main_control();
start_base_connect();
close_main_control();
} else if (what & BEV_EVENT_CONNECTED) {
retry_times = 0;
// recv login-response message before recving othfer fprs messages,
bufferevent_setcb(bev, recv_cb, NULL, connect_event_cb, NULL);
bufferevent_enable(bev, EV_READ|EV_WRITE|EV_PERSIST);
if (get_common_config()->tcp_mux)
open_connection_session(bev);
login();
}
}
static void keep_control_alive()
{
main_ctl->ticker_ping = evtimer_new(main_ctl->connect_base,
hb_sender_cb,
NULL);
if ( ! main_ctl->ticker_ping) {
debug(LOG_ERR, "Ping Ticker init failed!");
return;
}
set_ticker_ping_timer(main_ctl->ticker_ping);
}
static void server_dns_cb(int event_code, struct evutil_addrinfo *addr, void *ctx)
{
if (event_code) {
set_common_server_ip((const char *)evutil_gai_strerror(event_code));
} else {
struct evutil_addrinfo *ai;
if (addr->ai_canonname)
debug(LOG_DEBUG, "addr->ai_canonname [%s]", addr->ai_canonname);
for (ai = addr; ai; ai = ai->ai_next) {
char buf[128];
const char *s = NULL;
if (ai->ai_family == AF_INET) {
struct sockaddr_in *sin = (struct sockaddr_in *)ai->ai_addr;
s = evutil_inet_ntop(AF_INET, &sin->sin_addr, buf, 128);
} else if (ai->ai_family == AF_INET6) {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)ai->ai_addr;
s = evutil_inet_ntop(AF_INET6, &sin6->sin6_addr, buf, 128);
}
if (s) set_common_server_ip(s);
}
if (addr) evutil_freeaddrinfo(addr);
}
}
void start_base_connect()
{
struct common_conf *c_conf = get_common_config();
main_ctl->connect_bev = connect_server(main_ctl->connect_base,
c_conf->server_addr,
c_conf->server_port);
if ( ! main_ctl->connect_bev) {
debug(LOG_ERR,
"error: connect server [%s:%d] failed",
c_conf->server_addr,
c_conf->server_port);
exit(0);
}
debug(LOG_INFO, "connect server [%s:%d]...", c_conf->server_addr, c_conf->server_port);
bufferevent_enable(main_ctl->connect_bev, EV_WRITE|EV_READ);
bufferevent_setcb(main_ctl->connect_bev, NULL, NULL, connect_event_cb, NULL);
}
void sync_iv(unsigned char *iv)
{
struct frame *f = new_frame(cmdPSH, main_ctl->session_id);
assert(f);
f->len = (ushort) get_encrypt_block_size();
f->data = calloc(f->len, 1);
memcpy(f->data, iv, f->len);
struct bufferevent *bout = main_ctl->connect_bev;
if ( ! bout) {
return;
}
request(bout, f);
SAFE_FREE(f->data);
free_frame(f);
}
void login()
{
char *lg_msg = NULL;
int len = login_request_marshal(&lg_msg); //marshal login request
if ( ! lg_msg || ! len) {
debug(LOG_ERR,
"error: login_request_marshal failed, it should never be happenned");
exit(0);
}
// using sid = 3 is only for matching fprs, it will change after using tcp-mux
if (get_common_config()->tcp_mux)
sync_session_id(3);
send_msg_frp_server(NULL, TypeLogin, lg_msg, len, main_ctl->session_id);
SAFE_FREE(lg_msg);
}
void sync_session_id(uint32_t sid)
{
struct frame *f = new_frame(cmdNOP, sid);
assert(f);
size_t send_len = request(NULL, f);
debug(LOG_DEBUG, "sync session id %d, len %ld", sid, send_len);
SAFE_FREE(f);
}
void send_msg_frp_server(struct bufferevent *bev,
const enum msg_type type,
const char *msg,
const size_t msg_len,
uint32_t sid)
{
struct bufferevent *bout = NULL;
if (bev) {
bout = bev;
} else {
bout = main_ctl->connect_bev;
}
assert(bout);
debug(LOG_DEBUG, "send ----> [%c: %s]", type, msg);
struct message req_msg;
req_msg.data_p = NULL;
req_msg.type = type;
req_msg.data_len = msg_len;
char frame_type = 0;
struct frame *f = NULL;
// frame_type not truely matter, it will reset by set_frame_cmd
f = new_frame(frame_type, sid);
assert(f);
if (msg) {
req_msg.data_p = strdup(msg);
assert(req_msg.data_p);
}
unsigned char *pack_buf = NULL;
size_t pack_buf_len = pack(&req_msg, &pack_buf);
if ( ! pack_buf_len || ! pack_buf) {
debug(LOG_ERR, "error: send buffer pack failed!");
goto S_M_F_END;
}
set_frame_len(f, (ushort) pack_buf_len);
f->data = pack_buf;
if (get_common_config()->tcp_mux) {
switch (type)
{
case TypeLogin:
case TypePong: