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 <systemd/sd-daemon.h>
#include <libssh/libssh.h>
#include <libssh/server.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_CLIENTS_LIMIT];

int net_server(const char *hostaddr, in_port_t port)
{
        unsigned int namelen;
        int ret;
        int flags;
        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;

        socket_server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

        if (socket_server < 0)
        {
                log_error("Create socket failed\n");
                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);

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

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

        if (listen(socket_server, 10) < 0)
        {
                log_error("Socket listen failed (%d)\n", errno);
                return -1;
        }

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

        port_server = ntohs(sin.sin_port);
        namelen = sizeof(sin);

        log_std("Listening at %s:%d\n", hostaddr_server, port_server);

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

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

        flags = fcntl(socket_server, F_GETFL, 0);
        fcntl(socket_server, F_SETFL, flags | O_NONBLOCK);

        // Startup complete
        sd_notifyf(0, "READY=1\n"
                                  "STATUS=Listening at %s:%d\n"
                                  "MAINPID=%d",
                           hostaddr_server, port_server, 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_std("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_std("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_std("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_std("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)
                        {
                                while (!SYS_server_exit) // Accept all incoming connections until error
                                {
                                        socket_client = accept(socket_server, (struct sockaddr *)&sin, &namelen);
                                        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_std("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_error("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");
        }

        fcntl(socket_server, F_SETFL, flags);

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

        return 0;
}
1	sysadm	1.1	/***************************************************************************
2	sysadm	1.13	net_server.c - description
3			-------------------
4	sysadm	1.18	Copyright : (C) 2004-2025 by Leaflet
5			Email : leaflet@leafok.com
6	sysadm	1.1	***************************************************************************/
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	sysadm	1.18	* the Free Software Foundation; either version 3 of the License, or *
13	sysadm	1.1	* (at your option) any later version. *
14			* *
15			***************************************************************************/
16
17	sysadm	1.19	#define _XOPEN_SOURCE 500
18			#define _POSIX_C_SOURCE 200809L
19			#define _GNU_SOURCE
20
21	sysadm	1.14	#include "net_server.h"
22	sysadm	1.1	#include "common.h"
23	sysadm	1.14	#include "log.h"
24	sysadm	1.7	#include "io.h"
25	sysadm	1.44	#include "init.h"
26	sysadm	1.14	#include "fork.h"
27	sysadm	1.19	#include "menu.h"
28	sysadm	1.35	#include "file_loader.h"
29	sysadm	1.42	#include "section_list_loader.h"
30	sysadm	1.20	#include <errno.h>
31			#include <fcntl.h>
32			#include <string.h>
33	sysadm	1.19	#include <signal.h>
34	sysadm	1.20	#include <stdlib.h>
35	sysadm	1.19	#include <unistd.h>
36			#include <sys/syscall.h>
37	sysadm	1.7	#include <sys/socket.h>
38	sysadm	1.19	#include <sys/wait.h>
39	sysadm	1.25	#include <sys/epoll.h>
40	sysadm	1.9	#include <arpa/inet.h>
41	sysadm	1.31	#include <systemd/sd-daemon.h>
42	sysadm	1.46	#include <libssh/libssh.h>
43			#include <libssh/server.h>
44	sysadm	1.3
45	sysadm	1.44	struct process_sockaddr_t
46			{
47			pid_t pid;
48			in_addr_t s_addr;
49			};
50			typedef struct process_sockaddr_t PROCESS_SOCKADDR;
51
52			static PROCESS_SOCKADDR process_sockaddr_pool[MAX_CLIENTS_LIMIT];
53
54	sysadm	1.17	int net_server(const char *hostaddr, in_port_t port)
55	sysadm	1.1	{
56	sysadm	1.15	unsigned int namelen;
57	sysadm	1.19	int ret;
58	sysadm	1.15	int flags;
59	sysadm	1.13	struct sockaddr_in sin;
60	sysadm	1.25	struct epoll_event ev, events[MAX_EVENTS];
61			int nfds, epollfd;
62	sysadm	1.19	siginfo_t siginfo;
63	sysadm	1.31	int sd_notify_stopping = 0;
64	sysadm	1.34	MENU_SET *p_bbs_menu_new;
65	sysadm	1.44	int i, j;
66			pid_t pid;
67	sysadm	1.10
68	sysadm	1.13	socket_server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
69	sysadm	1.10
70	sysadm	1.13	if (socket_server < 0)
71			{
72			log_error("Create socket failed\n");
73	sysadm	1.27	return -1;
74	sysadm	1.13	}
75	sysadm	1.10
76	sysadm	1.13	sin.sin_family = AF_INET;
77	sysadm	1.23	sin.sin_addr.s_addr = (hostaddr[0] != '\0' ? inet_addr(hostaddr) : INADDR_ANY);
78	sysadm	1.13	sin.sin_port = htons(port);
79
80	sysadm	1.23	// Reuse address and port
81			flags = 1;
82			if (setsockopt(socket_server, SOL_SOCKET, SO_REUSEADDR, &flags, sizeof(flags)) < 0)
83			{
84			log_error("setsockopt SO_REUSEADDR error (%d)\n", errno);
85			}
86			if (setsockopt(socket_server, SOL_SOCKET, SO_REUSEPORT, &flags, sizeof(flags)) < 0)
87			{
88			log_error("setsockopt SO_REUSEPORT error (%d)\n", errno);
89			}
90
91	sysadm	1.13	if (bind(socket_server, (struct sockaddr *)&sin, sizeof(sin)) < 0)
92	sysadm	1.10	{
93	sysadm	1.23	log_error("Bind address %s:%u failed (%d)\n",
94			inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), errno);
95	sysadm	1.27	return -1;
96	sysadm	1.10	}
97
98	sysadm	1.13	if (listen(socket_server, 10) < 0)
99	sysadm	1.10	{
100	sysadm	1.23	log_error("Socket listen failed (%d)\n", errno);
101	sysadm	1.27	return -1;
102	sysadm	1.10	}
103	sysadm	1.1
104	sysadm	1.16	strncpy(hostaddr_server, inet_ntoa(sin.sin_addr), sizeof(hostaddr_server) - 1);
105			hostaddr_server[sizeof(hostaddr_server) - 1] = '\0';
106
107	sysadm	1.13	port_server = ntohs(sin.sin_port);
108	sysadm	1.19	namelen = sizeof(sin);
109	sysadm	1.13
110			log_std("Listening at %s:%d\n", hostaddr_server, port_server);
111
112	sysadm	1.25	epollfd = epoll_create1(0);
113			if (epollfd < 0)
114			{
115			log_error("epoll_create1() error (%d)\n", errno);
116			return -1;
117			}
118
119	sysadm	1.28	ev.events = EPOLLIN;
120	sysadm	1.25	ev.data.fd = socket_server;
121			if (epoll_ctl(epollfd, EPOLL_CTL_ADD, socket_server, &ev) == -1)
122			{
123			log_error("epoll_ctl(socket_server) error (%d)\n", errno);
124	sysadm	1.30	if (close(epollfd) < 0)
125			{
126			log_error("close(epoll) error (%d)\n");
127			}
128	sysadm	1.25	return -1;
129			}
130
131			flags = fcntl(socket_server, F_GETFL, 0);
132			fcntl(socket_server, F_SETFL, flags \| O_NONBLOCK);
133
134	sysadm	1.31	// Startup complete
135			sd_notifyf(0, "READY=1\n"
136	sysadm	1.32	"STATUS=Listening at %s:%d\n"
137	sysadm	1.31	"MAINPID=%d",
138	sysadm	1.32	hostaddr_server, port_server, getpid());
139	sysadm	1.31
140	sysadm	1.19	while (!SYS_server_exit \|\| SYS_child_process_count > 0)
141	sysadm	1.13	{
142	sysadm	1.31	if (SYS_server_exit && !sd_notify_stopping)
143			{
144			sd_notify(0, "STOPPING=1");
145			sd_notify_stopping = 1;
146			}
147	sysadm	1.37
148	sysadm	1.22	while ((SYS_child_exit \|\| SYS_server_exit) && SYS_child_process_count > 0)
149	sysadm	1.19	{
150	sysadm	1.30	SYS_child_exit = 0;
151
152	sysadm	1.19	siginfo.si_pid = 0;
153			ret = waitid(P_ALL, 0, &siginfo, WEXITED \| WNOHANG);
154			if (ret == 0 && siginfo.si_pid > 0)
155			{
156	sysadm	1.30	SYS_child_exit = 1; // Retry waitid
157
158	sysadm	1.19	SYS_child_process_count--;
159			log_std("Child process (%d) exited\n", siginfo.si_pid);
160	sysadm	1.44
161	sysadm	1.45	if (siginfo.si_pid != section_list_loader_pid)
162	sysadm	1.44	{
163	sysadm	1.45	i = 0;
164			for (; i < BBS_max_client; i++)
165	sysadm	1.44	{
166	sysadm	1.45	if (process_sockaddr_pool[i].pid == siginfo.si_pid)
167			{
168			process_sockaddr_pool[i].pid = 0;
169			break;
170			}
171			}
172			if (i >= BBS_max_client)
173			{
174			log_error("Child process (%d) not found in process sockaddr pool\n", siginfo.si_pid);
175	sysadm	1.44	}
176			}
177	sysadm	1.19	}
178			else if (ret == 0)
179			{
180			break;
181			}
182			else if (ret < 0)
183			{
184			log_error("Error in waitid: %d\n", errno);
185			break;
186			}
187			}
188
189	sysadm	1.22	if (SYS_server_exit && !SYS_child_exit && SYS_child_process_count > 0)
190	sysadm	1.21	{
191	sysadm	1.22	log_std("Notify %d child process to exit\n", SYS_child_process_count);
192	sysadm	1.21	if (kill(0, SIGTERM) < 0)
193			{
194			log_error("Send SIGTERM signal failed (%d)\n", errno);
195			}
196	sysadm	1.31
197			sd_notifyf(0, "STATUS=Waiting for %d child process to exit", SYS_child_process_count);
198	sysadm	1.21	}
199
200	sysadm	1.44	if (SYS_conf_reload && !SYS_server_exit)
201	sysadm	1.19	{
202	sysadm	1.44	SYS_conf_reload = 0;
203	sysadm	1.37	sd_notify(0, "RELOADING=1");
204	sysadm	1.30
205	sysadm	1.44	// Reload configuration
206			if (load_conf(CONF_BBSD) < 0)
207			{
208			log_error("Reload conf failed\n");
209			}
210
211	sysadm	1.34	p_bbs_menu_new = calloc(1, sizeof(MENU_SET));
212			if (p_bbs_menu_new == NULL)
213			{
214			log_error("OOM: calloc(MENU_SET)\n");
215			}
216			else if (load_menu(p_bbs_menu_new, CONF_MENU) < 0)
217			{
218			unload_menu(p_bbs_menu_new);
219			free(p_bbs_menu_new);
220	sysadm	1.38	p_bbs_menu_new = NULL;
221	sysadm	1.33
222	sysadm	1.19	log_error("Reload menu failed\n");
223			}
224			else
225			{
226	sysadm	1.34	unload_menu(p_bbs_menu);
227			free(p_bbs_menu);
228
229			p_bbs_menu = p_bbs_menu_new;
230			p_bbs_menu_new = NULL;
231
232	sysadm	1.19	log_std("Reload menu successfully\n");
233			}
234	sysadm	1.37
235			sd_notify(0, "READY=1");
236	sysadm	1.19	}
237
238	sysadm	1.35	if (SYS_data_file_reload && !SYS_server_exit)
239			{
240			SYS_data_file_reload = 0;
241	sysadm	1.37	sd_notify(0, "RELOADING=1");
242	sysadm	1.35
243			for (int i = 0; i < data_files_load_startup_count; i++)
244			{
245	sysadm	1.39	if (load_file(data_files_load_startup[i]) < 0)
246	sysadm	1.35	{
247			log_error("load_file_mmap(%s) error\n", data_files_load_startup[i]);
248			}
249			}
250
251			log_std("Reload data files successfully\n");
252	sysadm	1.37	sd_notify(0, "READY=1");
253	sysadm	1.35	}
254
255	sysadm	1.42	if (SYS_section_list_reload && !SYS_server_exit)
256			{
257			SYS_section_list_reload = 0;
258
259			if (section_list_loader_reload() < 0)
260			{
261			log_error("ksection_list_loader_reload() failed\n");
262			}
263			}
264
265	sysadm	1.25	nfds = epoll_wait(epollfd, events, MAX_EVENTS, 100); // 0.1 second
266	sysadm	1.22
267	sysadm	1.25	if (nfds < 0)
268	sysadm	1.19	{
269			if (errno != EINTR)
270			{
271	sysadm	1.25	log_error("epoll_wait() error (%d)\n", errno);
272			break;
273	sysadm	1.19	}
274			continue;
275			}
276	sysadm	1.13
277	sysadm	1.19	// Stop accept new connection on exit
278			if (SYS_server_exit)
279	sysadm	1.13	{
280			continue;
281			}
282
283	sysadm	1.25	for (int i = 0; i < nfds; i++)
284	sysadm	1.13	{
285	sysadm	1.25	if (events[i].data.fd == socket_server)
286	sysadm	1.13	{
287	sysadm	1.29	while (!SYS_server_exit) // Accept all incoming connections until error
288	sysadm	1.13	{
289	sysadm	1.25	socket_client = accept(socket_server, (struct sockaddr *)&sin, &namelen);
290			if (socket_client < 0)
291			{
292	sysadm	1.28	if (errno == EAGAIN \|\| errno == EWOULDBLOCK)
293			{
294			break;
295			}
296			else if (errno == EINTR)
297			{
298			continue;
299			}
300			else
301	sysadm	1.25	{
302			log_error("accept(socket_server) error (%d)\n", errno);
303	sysadm	1.28	break;
304	sysadm	1.25	}
305			}
306
307			strncpy(hostaddr_client, inet_ntoa(sin.sin_addr), sizeof(hostaddr_client) - 1);
308			hostaddr_client[sizeof(hostaddr_client) - 1] = '\0';
309
310			port_client = ntohs(sin.sin_port);
311
312			log_std("Accept connection from %s:%d\n", hostaddr_client, port_client);
313
314	sysadm	1.43	if (SYS_child_process_count - 1 < BBS_max_client)
315	sysadm	1.25	{
316	sysadm	1.44	j = 0;
317			for (i = 0; i < BBS_max_client; i++)
318			{
319			if (process_sockaddr_pool[i].pid != 0 && process_sockaddr_pool[i].s_addr == sin.sin_addr.s_addr)
320			{
321			j++;
322			if (j >= BBS_max_client_per_ip)
323			{
324			log_error("Too many client connections (%d) from %s\n", j, hostaddr_client);
325			break;
326			}
327			}
328			}
329
330			if (j < BBS_max_client_per_ip)
331	sysadm	1.43	{
332	sysadm	1.44	if ((pid = fork_server()) < 0)
333			{
334			log_error("fork_server() error\n");
335			}
336			else if (pid > 0)
337			{
338			i = 0;
339			for (; i < BBS_max_client; i++)
340			{
341			if (process_sockaddr_pool[i].pid == 0)
342			{
343			break;
344			}
345			}
346
347			if (i >= BBS_max_client)
348			{
349			log_error("Process sockaddr pool depleted\n");
350			}
351			else
352			{
353			process_sockaddr_pool[i].pid = pid;
354			process_sockaddr_pool[i].s_addr = sin.sin_addr.s_addr;
355			}
356			}
357	sysadm	1.43	}
358			}
359			else
360			{
361			log_error("Rejected client connection over limit (%d)\n", SYS_child_process_count - 1);
362	sysadm	1.25	}
363
364			if (close(socket_client) == -1)
365			{
366			log_error("close(socket_lient) error (%d)\n", errno);
367			}
368	sysadm	1.13	}
369			}
370			}
371	sysadm	1.25	}
372	sysadm	1.13
373	sysadm	1.30	if (close(epollfd) < 0)
374			{
375			log_error("close(epoll) error (%d)\n");
376			}
377
378	sysadm	1.25	fcntl(socket_server, F_SETFL, flags);
379	sysadm	1.13
380			if (close(socket_server) == -1)
381			{
382			log_error("Close server socket failed\n");
383			}
384	sysadm	1.7
385	sysadm	1.13	return 0;
386	sysadm	1.1	}
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