lbbs/src/net_server.c

/***************************************************************************
                                                  net_server.c  -  description
                                                         -------------------
        Copyright            : (C) 2004-2025 by Leaflet
        Email                : leaflet@leafok.com
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 3 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#define _XOPEN_SOURCE 500
#define _POSIX_C_SOURCE 200809L
#define _GNU_SOURCE

#include "net_server.h"
#include "common.h"
#include "log.h"
#include "io.h"
#include "init.h"
#include "fork.h"
#include "menu.h"
#include "file_loader.h"
#include "section_list_loader.h"
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/syscall.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <sys/epoll.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <systemd/sd-daemon.h>

struct process_sockaddr_t
{
        pid_t pid;
        in_addr_t s_addr;
};
typedef struct process_sockaddr_t PROCESS_SOCKADDR;

static PROCESS_SOCKADDR process_sockaddr_pool[MAX_CLIENT_LIMIT];

int net_server(const char *hostaddr, in_port_t port[])
{
        unsigned int addrlen;
        int ret;
        int flags[2];
        struct sockaddr_in sin;
        struct epoll_event ev, events[MAX_EVENTS];
        int nfds, epollfd;
        siginfo_t siginfo;
        int sd_notify_stopping = 0;
        MENU_SET *p_bbs_menu_new;
        int i, j;
        pid_t pid;
        int ssh_log_level = SSH_LOG_NOLOG;

        ssh_init();

        sshbind = ssh_bind_new();

        if (ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BINDADDR, hostaddr) < 0 ||
                ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BINDPORT, &port) < 0 ||
                ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY, SSH_HOST_KEYFILE) < 0 ||
                ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_LOG_VERBOSITY, &ssh_log_level) < 0)
        {
                log_error("Error setting SSH bind options: %s\n", ssh_get_error(sshbind));
                ssh_bind_free(sshbind);
                return -1;
        }

        epollfd = epoll_create1(0);
        if (epollfd < 0)
        {
                log_error("epoll_create1() error (%d)\n", errno);
                return -1;
        }

        // Server socket
        for (i = 0; i < 2; i++)
        {
                socket_server[i] = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

                if (socket_server[i] < 0)
                {
                        log_error("Create socket_server error (%d)\n", errno);
                        return -1;
                }

                sin.sin_family = AF_INET;
                sin.sin_addr.s_addr = (hostaddr[0] != '\0' ? inet_addr(hostaddr) : INADDR_ANY);
                sin.sin_port = htons(port[i]);

                // Reuse address and port
                flags[i] = 1;
                if (setsockopt(socket_server[i], SOL_SOCKET, SO_REUSEADDR, &flags[i], sizeof(flags[i])) < 0)
                {
                        log_error("setsockopt SO_REUSEADDR error (%d)\n", errno);
                }
                if (setsockopt(socket_server[i], SOL_SOCKET, SO_REUSEPORT, &flags[i], sizeof(flags[i])) < 0)
                {
                        log_error("setsockopt SO_REUSEPORT error (%d)\n", errno);
                }

                if (bind(socket_server[i], (struct sockaddr *)&sin, sizeof(sin)) < 0)
                {
                        log_error("Bind address %s:%u error (%d)\n",
                                          inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), errno);
                        return -1;
                }

                if (listen(socket_server[i], 10) < 0)
                {
                        log_error("Telnet socket listen error (%d)\n", errno);
                        return -1;
                }

                log_common("Listening at %s:%u\n", inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));

                ev.events = EPOLLIN;
                ev.data.fd = socket_server[i];
                if (epoll_ctl(epollfd, EPOLL_CTL_ADD, socket_server[i], &ev) == -1)
                {
                        log_error("epoll_ctl(socket_server[%d]) error (%d)\n", i, errno);
                        if (close(epollfd) < 0)
                        {
                                log_error("close(epoll) error (%d)\n");
                        }
                        return -1;
                }

                flags[i] = fcntl(socket_server[i], F_GETFL, 0);
                fcntl(socket_server[i], F_SETFL, flags[i] | O_NONBLOCK);
        }

        // Startup complete
        sd_notifyf(0, "READY=1\n"
                                  "STATUS=Listening at %s:%d (Telnet) and %s:%d (SSH2)\n"
                                  "MAINPID=%d",
                           hostaddr, port[0], hostaddr, port[1], getpid());

        while (!SYS_server_exit || SYS_child_process_count > 0)
        {
                if (SYS_server_exit && !sd_notify_stopping)
                {
                        sd_notify(0, "STOPPING=1");
                        sd_notify_stopping = 1;
                }

                while ((SYS_child_exit || SYS_server_exit) && SYS_child_process_count > 0)
                {
                        SYS_child_exit = 0;

                        siginfo.si_pid = 0;
                        ret = waitid(P_ALL, 0, &siginfo, WEXITED | WNOHANG);
                        if (ret == 0 && siginfo.si_pid > 0)
                        {
                                SYS_child_exit = 1; // Retry waitid

                                SYS_child_process_count--;
                                log_common("Child process (%d) exited\n", siginfo.si_pid);

                                if (siginfo.si_pid != section_list_loader_pid)
                                {
                                        i = 0;
                                        for (; i < BBS_max_client; i++)
                                        {
                                                if (process_sockaddr_pool[i].pid == siginfo.si_pid)
                                                {
                                                        process_sockaddr_pool[i].pid = 0;
                                                        break;
                                                }
                                        }
                                        if (i >= BBS_max_client)
                                        {
                                                log_error("Child process (%d) not found in process sockaddr pool\n", siginfo.si_pid);
                                        }
                                }
                        }
                        else if (ret == 0)
                        {
                                break;
                        }
                        else if (ret < 0)
                        {
                                log_error("Error in waitid: %d\n", errno);
                                break;
                        }
                }

                if (SYS_server_exit && !SYS_child_exit && SYS_child_process_count > 0)
                {
                        log_common("Notify %d child process to exit\n", SYS_child_process_count);
                        if (kill(0, SIGTERM) < 0)
                        {
                                log_error("Send SIGTERM signal failed (%d)\n", errno);
                        }

                        sd_notifyf(0, "STATUS=Waiting for %d child process to exit", SYS_child_process_count);
                }

                if (SYS_conf_reload && !SYS_server_exit)
                {
                        SYS_conf_reload = 0;
                        sd_notify(0, "RELOADING=1");

                        // Reload configuration
                        if (load_conf(CONF_BBSD) < 0)
                        {
                                log_error("Reload conf failed\n");
                        }

                        p_bbs_menu_new = calloc(1, sizeof(MENU_SET));
                        if (p_bbs_menu_new == NULL)
                        {
                                log_error("OOM: calloc(MENU_SET)\n");
                        }
                        else if (load_menu(p_bbs_menu_new, CONF_MENU) < 0)
                        {
                                unload_menu(p_bbs_menu_new);
                                free(p_bbs_menu_new);
                                p_bbs_menu_new = NULL;

                                log_error("Reload menu failed\n");
                        }
                        else
                        {
                                unload_menu(p_bbs_menu);
                                free(p_bbs_menu);

                                p_bbs_menu = p_bbs_menu_new;
                                p_bbs_menu_new = NULL;

                                log_common("Reload menu successfully\n");
                        }

                        sd_notify(0, "READY=1");
                }

                if (SYS_data_file_reload && !SYS_server_exit)
                {
                        SYS_data_file_reload = 0;
                        sd_notify(0, "RELOADING=1");

                        for (int i = 0; i < data_files_load_startup_count; i++)
                        {
                                if (load_file(data_files_load_startup[i]) < 0)
                                {
                                        log_error("load_file_mmap(%s) error\n", data_files_load_startup[i]);
                                }
                        }

                        log_common("Reload data files successfully\n");
                        sd_notify(0, "READY=1");
                }

                if (SYS_section_list_reload && !SYS_server_exit)
                {
                        SYS_section_list_reload = 0;

                        if (section_list_loader_reload() < 0)
                        {
                                log_error("ksection_list_loader_reload() failed\n");
                        }
                }

                nfds = epoll_wait(epollfd, events, MAX_EVENTS, 100); // 0.1 second

                if (nfds < 0)
                {
                        if (errno != EINTR)
                        {
                                log_error("epoll_wait() error (%d)\n", errno);
                                break;
                        }
                        continue;
                }

                // Stop accept new connection on exit
                if (SYS_server_exit)
                {
                        continue;
                }

                for (int i = 0; i < nfds; i++)
                {
                        if (events[i].data.fd == socket_server[0] || events[i].data.fd == socket_server[1])
                        {
                                SSH_v2 = (events[i].data.fd == socket_server[1] ? 1 : 0);

                                while (!SYS_server_exit) // Accept all incoming connections until error
                                {
                                        addrlen = sizeof(sin);
                                        socket_client = accept(socket_server[SSH_v2], (struct sockaddr *)&sin, &addrlen);
                                        if (socket_client < 0)
                                        {
                                                if (errno == EAGAIN || errno == EWOULDBLOCK)
                                                {
                                                        break;
                                                }
                                                else if (errno == EINTR)
                                                {
                                                        continue;
                                                }
                                                else
                                                {
                                                        log_error("accept(socket_server) error (%d)\n", errno);
                                                        break;
                                                }
                                        }

                                        strncpy(hostaddr_client, inet_ntoa(sin.sin_addr), sizeof(hostaddr_client) - 1);
                                        hostaddr_client[sizeof(hostaddr_client) - 1] = '\0';

                                        port_client = ntohs(sin.sin_port);

                                        log_common("Accept connection from %s:%d\n", hostaddr_client, port_client);

                                        if (SYS_child_process_count - 1 < BBS_max_client)
                                        {
                                                j = 0;
                                                for (i = 0; i < BBS_max_client; i++)
                                                {
                                                        if (process_sockaddr_pool[i].pid != 0 && process_sockaddr_pool[i].s_addr == sin.sin_addr.s_addr)
                                                        {
                                                                j++;
                                                                if (j >= BBS_max_client_per_ip)
                                                                {
                                                                        log_common("Too many client connections (%d) from %s\n", j, hostaddr_client);
                                                                        break;
                                                                }
                                                        }
                                                }

                                                if (j < BBS_max_client_per_ip)
                                                {
                                                        if ((pid = fork_server()) < 0)
                                                        {
                                                                log_error("fork_server() error\n");
                                                        }
                                                        else if (pid > 0)
                                                        {
                                                                i = 0;
                                                                for (; i < BBS_max_client; i++)
                                                                {
                                                                        if (process_sockaddr_pool[i].pid == 0)
                                                                        {
                                                                                break;
                                                                        }
                                                                }

                                                                if (i >= BBS_max_client)
                                                                {
                                                                        log_error("Process sockaddr pool depleted\n");
                                                                }
                                                                else
                                                                {
                                                                        process_sockaddr_pool[i].pid = pid;
                                                                        process_sockaddr_pool[i].s_addr = sin.sin_addr.s_addr;
                                                                }
                                                        }
                                                }
                                        }
                                        else
                                        {
                                                log_error("Rejected client connection over limit (%d)\n", SYS_child_process_count - 1);
                                        }

                                        if (close(socket_client) == -1)
                                        {
                                                log_error("close(socket_lient) error (%d)\n", errno);
                                        }
                                }
                        }
                }
        }

        if (close(epollfd) < 0)
        {
                log_error("close(epoll) error (%d)\n");
        }

        for (i = 0; i < 2; i++)
        {
                fcntl(socket_server[i], F_SETFL, flags[i]);

                if (close(socket_server[i]) == -1)
                {
                        log_error("Close server socket failed\n");
                }
        }

        ssh_bind_free(sshbind);
        ssh_finalize();

        return 0;
}
1	/***************************************************************************
2	net_server.c - description
3	-------------------
4	Copyright : (C) 2004-2025 by Leaflet
5	Email : leaflet@leafok.com
6	***************************************************************************/
7
8	/***************************************************************************
9	* *
10	* This program is free software; you can redistribute it and/or modify *
11	* it under the terms of the GNU General Public License as published by *
12	* the Free Software Foundation; either version 3 of the License, or *
13	* (at your option) any later version. *
14	* *
15	***************************************************************************/
16
17	#define _XOPEN_SOURCE 500
18	#define _POSIX_C_SOURCE 200809L
19	#define _GNU_SOURCE
20
21	#include "net_server.h"
22	#include "common.h"
23	#include "log.h"
24	#include "io.h"
25	#include "init.h"
26	#include "fork.h"
27	#include "menu.h"
28	#include "file_loader.h"
29	#include "section_list_loader.h"
30	#include <errno.h>
31	#include <fcntl.h>
32	#include <string.h>
33	#include <signal.h>
34	#include <stdlib.h>
35	#include <unistd.h>
36	#include <sys/syscall.h>
37	#include <sys/socket.h>
38	#include <sys/wait.h>
39	#include <sys/epoll.h>
40	#include <arpa/inet.h>
41	#include <netinet/in.h>
42	#include <systemd/sd-daemon.h>
43
44	struct process_sockaddr_t
45	{
46	pid_t pid;
47	in_addr_t s_addr;
48	};
49	typedef struct process_sockaddr_t PROCESS_SOCKADDR;
50
51	static PROCESS_SOCKADDR process_sockaddr_pool[MAX_CLIENT_LIMIT];
52
53	int net_server(const char *hostaddr, in_port_t port[])
54	{
55	unsigned int addrlen;
56	int ret;
57	int flags[2];
58	struct sockaddr_in sin;
59	struct epoll_event ev, events[MAX_EVENTS];
60	int nfds, epollfd;
61	siginfo_t siginfo;
62	int sd_notify_stopping = 0;
63	MENU_SET *p_bbs_menu_new;
64	int i, j;
65	pid_t pid;
66	int ssh_log_level = SSH_LOG_NOLOG;
67
68	ssh_init();
69
70	sshbind = ssh_bind_new();
71
72	if (ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BINDADDR, hostaddr) < 0 \|\|
73	ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BINDPORT, &port) < 0 \|\|
74	ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY, SSH_HOST_KEYFILE) < 0 \|\|
75	ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_LOG_VERBOSITY, &ssh_log_level) < 0)
76	{
77	log_error("Error setting SSH bind options: %s\n", ssh_get_error(sshbind));
78	ssh_bind_free(sshbind);
79	return -1;
80	}
81
82	epollfd = epoll_create1(0);
83	if (epollfd < 0)
84	{
85	log_error("epoll_create1() error (%d)\n", errno);
86	return -1;
87	}
88
89	// Server socket
90	for (i = 0; i < 2; i++)
91	{
92	socket_server[i] = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
93
94	if (socket_server[i] < 0)
95	{
96	log_error("Create socket_server error (%d)\n", errno);
97	return -1;
98	}
99
100	sin.sin_family = AF_INET;
101	sin.sin_addr.s_addr = (hostaddr[0] != '\0' ? inet_addr(hostaddr) : INADDR_ANY);
102	sin.sin_port = htons(port[i]);
103
104	// Reuse address and port
105	flags[i] = 1;
106	if (setsockopt(socket_server[i], SOL_SOCKET, SO_REUSEADDR, &flags[i], sizeof(flags[i])) < 0)
107	{
108	log_error("setsockopt SO_REUSEADDR error (%d)\n", errno);
109	}
110	if (setsockopt(socket_server[i], SOL_SOCKET, SO_REUSEPORT, &flags[i], sizeof(flags[i])) < 0)
111	{
112	log_error("setsockopt SO_REUSEPORT error (%d)\n", errno);
113	}
114
115	if (bind(socket_server[i], (struct sockaddr *)&sin, sizeof(sin)) < 0)
116	{
117	log_error("Bind address %s:%u error (%d)\n",
118	inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), errno);
119	return -1;
120	}
121
122	if (listen(socket_server[i], 10) < 0)
123	{
124	log_error("Telnet socket listen error (%d)\n", errno);
125	return -1;
126	}
127
128	log_common("Listening at %s:%u\n", inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
129
130	ev.events = EPOLLIN;
131	ev.data.fd = socket_server[i];
132	if (epoll_ctl(epollfd, EPOLL_CTL_ADD, socket_server[i], &ev) == -1)
133	{
134	log_error("epoll_ctl(socket_server[%d]) error (%d)\n", i, errno);
135	if (close(epollfd) < 0)
136	{
137	log_error("close(epoll) error (%d)\n");
138	}
139	return -1;
140	}
141
142	flags[i] = fcntl(socket_server[i], F_GETFL, 0);
143	fcntl(socket_server[i], F_SETFL, flags[i] \| O_NONBLOCK);
144	}
145
146	// Startup complete
147	sd_notifyf(0, "READY=1\n"
148	"STATUS=Listening at %s:%d (Telnet) and %s:%d (SSH2)\n"
149	"MAINPID=%d",
150	hostaddr, port[0], hostaddr, port[1], getpid());
151
152	while (!SYS_server_exit \|\| SYS_child_process_count > 0)
153	{
154	if (SYS_server_exit && !sd_notify_stopping)
155	{
156	sd_notify(0, "STOPPING=1");
157	sd_notify_stopping = 1;
158	}
159
160	while ((SYS_child_exit \|\| SYS_server_exit) && SYS_child_process_count > 0)
161	{
162	SYS_child_exit = 0;
163
164	siginfo.si_pid = 0;
165	ret = waitid(P_ALL, 0, &siginfo, WEXITED \| WNOHANG);
166	if (ret == 0 && siginfo.si_pid > 0)
167	{
168	SYS_child_exit = 1; // Retry waitid
169
170	SYS_child_process_count--;
171	log_common("Child process (%d) exited\n", siginfo.si_pid);
172
173	if (siginfo.si_pid != section_list_loader_pid)
174	{
175	i = 0;
176	for (; i < BBS_max_client; i++)
177	{
178	if (process_sockaddr_pool[i].pid == siginfo.si_pid)
179	{
180	process_sockaddr_pool[i].pid = 0;
181	break;
182	}
183	}
184	if (i >= BBS_max_client)
185	{
186	log_error("Child process (%d) not found in process sockaddr pool\n", siginfo.si_pid);
187	}
188	}
189	}
190	else if (ret == 0)
191	{
192	break;
193	}
194	else if (ret < 0)
195	{
196	log_error("Error in waitid: %d\n", errno);
197	break;
198	}
199	}
200
201	if (SYS_server_exit && !SYS_child_exit && SYS_child_process_count > 0)
202	{
203	log_common("Notify %d child process to exit\n", SYS_child_process_count);
204	if (kill(0, SIGTERM) < 0)
205	{
206	log_error("Send SIGTERM signal failed (%d)\n", errno);
207	}
208
209	sd_notifyf(0, "STATUS=Waiting for %d child process to exit", SYS_child_process_count);
210	}
211
212	if (SYS_conf_reload && !SYS_server_exit)
213	{
214	SYS_conf_reload = 0;
215	sd_notify(0, "RELOADING=1");
216
217	// Reload configuration
218	if (load_conf(CONF_BBSD) < 0)
219	{
220	log_error("Reload conf failed\n");
221	}
222
223	p_bbs_menu_new = calloc(1, sizeof(MENU_SET));
224	if (p_bbs_menu_new == NULL)
225	{
226	log_error("OOM: calloc(MENU_SET)\n");
227	}
228	else if (load_menu(p_bbs_menu_new, CONF_MENU) < 0)
229	{
230	unload_menu(p_bbs_menu_new);
231	free(p_bbs_menu_new);
232	p_bbs_menu_new = NULL;
233
234	log_error("Reload menu failed\n");
235	}
236	else
237	{
238	unload_menu(p_bbs_menu);
239	free(p_bbs_menu);
240
241	p_bbs_menu = p_bbs_menu_new;
242	p_bbs_menu_new = NULL;
243
244	log_common("Reload menu successfully\n");
245	}
246
247	sd_notify(0, "READY=1");
248	}
249
250	if (SYS_data_file_reload && !SYS_server_exit)
251	{
252	SYS_data_file_reload = 0;
253	sd_notify(0, "RELOADING=1");
254
255	for (int i = 0; i < data_files_load_startup_count; i++)
256	{
257	if (load_file(data_files_load_startup[i]) < 0)
258	{
259	log_error("load_file_mmap(%s) error\n", data_files_load_startup[i]);
260	}
261	}
262
263	log_common("Reload data files successfully\n");
264	sd_notify(0, "READY=1");
265	}
266
267	if (SYS_section_list_reload && !SYS_server_exit)
268	{
269	SYS_section_list_reload = 0;
270
271	if (section_list_loader_reload() < 0)
272	{
273	log_error("ksection_list_loader_reload() failed\n");
274	}
275	}
276
277	nfds = epoll_wait(epollfd, events, MAX_EVENTS, 100); // 0.1 second
278
279	if (nfds < 0)
280	{
281	if (errno != EINTR)
282	{
283	log_error("epoll_wait() error (%d)\n", errno);
284	break;
285	}
286	continue;
287	}
288
289	// Stop accept new connection on exit
290	if (SYS_server_exit)
291	{
292	continue;
293	}
294
295	for (int i = 0; i < nfds; i++)
296	{
297	if (events[i].data.fd == socket_server[0] \|\| events[i].data.fd == socket_server[1])
298	{
299	SSH_v2 = (events[i].data.fd == socket_server[1] ? 1 : 0);
300
301	while (!SYS_server_exit) // Accept all incoming connections until error
302	{
303	addrlen = sizeof(sin);
304	socket_client = accept(socket_server[SSH_v2], (struct sockaddr *)&sin, &addrlen);
305	if (socket_client < 0)
306	{
307	if (errno == EAGAIN \|\| errno == EWOULDBLOCK)
308	{
309	break;
310	}
311	else if (errno == EINTR)
312	{
313	continue;
314	}
315	else
316	{
317	log_error("accept(socket_server) error (%d)\n", errno);
318	break;
319	}
320	}
321
322	strncpy(hostaddr_client, inet_ntoa(sin.sin_addr), sizeof(hostaddr_client) - 1);
323	hostaddr_client[sizeof(hostaddr_client) - 1] = '\0';
324
325	port_client = ntohs(sin.sin_port);
326
327	log_common("Accept connection from %s:%d\n", hostaddr_client, port_client);
328
329	if (SYS_child_process_count - 1 < BBS_max_client)
330	{
331	j = 0;
332	for (i = 0; i < BBS_max_client; i++)
333	{
334	if (process_sockaddr_pool[i].pid != 0 && process_sockaddr_pool[i].s_addr == sin.sin_addr.s_addr)
335	{
336	j++;
337	if (j >= BBS_max_client_per_ip)
338	{
339	log_common("Too many client connections (%d) from %s\n", j, hostaddr_client);
340	break;
341	}
342	}
343	}
344
345	if (j < BBS_max_client_per_ip)
346	{
347	if ((pid = fork_server()) < 0)
348	{
349	log_error("fork_server() error\n");
350	}
351	else if (pid > 0)
352	{
353	i = 0;
354	for (; i < BBS_max_client; i++)
355	{
356	if (process_sockaddr_pool[i].pid == 0)
357	{
358	break;
359	}
360	}
361
362	if (i >= BBS_max_client)
363	{
364	log_error("Process sockaddr pool depleted\n");
365	}
366	else
367	{
368	process_sockaddr_pool[i].pid = pid;
369	process_sockaddr_pool[i].s_addr = sin.sin_addr.s_addr;
370	}
371	}
372	}
373	}
374	else
375	{
376	log_error("Rejected client connection over limit (%d)\n", SYS_child_process_count - 1);
377	}
378
379	if (close(socket_client) == -1)
380	{
381	log_error("close(socket_lient) error (%d)\n", errno);
382	}
383	}
384	}
385	}
386	}
387
388	if (close(epollfd) < 0)
389	{
390	log_error("close(epoll) error (%d)\n");
391	}
392
393	for (i = 0; i < 2; i++)
394	{
395	fcntl(socket_server[i], F_SETFL, flags[i]);
396
397	if (close(socket_server[i]) == -1)
398	{
399	log_error("Close server socket failed\n");
400	}
401	}
402
403	ssh_bind_free(sshbind);
404	ssh_finalize();
405
406	return 0;
407	}
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