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.                                   *
 *                                                                         *
 ***************************************************************************/

#include "net_server.h"
#include "common.h"
#include "log.h"
#include "io.h"
#include "fork.h"
#include "tcplib.h"
#include <sys/socket.h>
#include <arpa/inet.h>

int net_server(const char *hostaddr, in_port_t port)
{
        unsigned int namelen;
        int result;
        int flags;
        struct sockaddr_in sin;
        fd_set testfds;
        struct timeval timeout;

        socket_server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

        if (socket_server < 0)
        {
                log_error("Create socket failed\n");
                exit(1);
        }

        sin.sin_family = AF_INET;
        sin.sin_addr.s_addr =
                (strnlen(hostaddr, sizeof(hostaddr)) > 0 ? inet_addr(hostaddr) : INADDR_ANY);
        sin.sin_port = htons(port);

        if (bind(socket_server, (struct sockaddr *)&sin, sizeof(sin)) < 0)
        {
                log_error("Bind address %s:%u failed\n",
                                  inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
                exit(2);
        }

        if (listen(socket_server, 10) < 0)
        {
                log_error("Socket listen failed\n");
                exit(3);
        }

        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);

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

        namelen = sizeof(sin);
        while (!SYS_exit)
        {
                FD_ZERO(&testfds);
                FD_SET(socket_server, &testfds);

                timeout.tv_sec = 1;
                timeout.tv_usec = 0;

                result = SignalSafeSelect(FD_SETSIZE, &testfds, NULL, NULL, &timeout);
                if (result < 0)
                {
                        log_error("Accept connection error\n");
                        continue;
                }

                if (result == 0)
                {
                        continue;
                }

                if (FD_ISSET(socket_server, &testfds))
                {
                        flags = fcntl(socket_server, F_GETFL, 0);
                        fcntl(socket_server, F_SETFL, flags | O_NONBLOCK);
                        while ((socket_client =
                                                accept(socket_server, (struct sockaddr *)&sin, &namelen)) < 0)
                        {
                                if (errno != EWOULDBLOCK && errno != ECONNABORTED && errno != EINTR)
                                {
                                        log_error("Accept connection error\n");
                                        break;
                                }
                        }
                        fcntl(socket_server, F_SETFL, flags);
                }

                if (socket_client < 0)
                {
                        log_error("Accept connection error\n");
                        continue;
                }

                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 (fork_server() < 0)
                {
                        log_error("Fork error\n");
                }

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

        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	1.14	#include "net_server.h"
18	sysadm	1.1	#include "common.h"
19	sysadm	1.14	#include "log.h"
20	sysadm	1.7	#include "io.h"
21	sysadm	1.14	#include "fork.h"
22	sysadm	1.11	#include "tcplib.h"
23	sysadm	1.7	#include <sys/socket.h>
24	sysadm	1.9	#include <arpa/inet.h>
25	sysadm	1.3
26	sysadm	1.17	int net_server(const char *hostaddr, in_port_t port)
27	sysadm	1.1	{
28	sysadm	1.15	unsigned int namelen;
29			int result;
30			int flags;
31	sysadm	1.13	struct sockaddr_in sin;
32			fd_set testfds;
33			struct timeval timeout;
34	sysadm	1.10
35	sysadm	1.13	socket_server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
36	sysadm	1.10
37	sysadm	1.13	if (socket_server < 0)
38			{
39			log_error("Create socket failed\n");
40			exit(1);
41			}
42	sysadm	1.10
43	sysadm	1.13	sin.sin_family = AF_INET;
44			sin.sin_addr.s_addr =
45	sysadm	1.16	(strnlen(hostaddr, sizeof(hostaddr)) > 0 ? inet_addr(hostaddr) : INADDR_ANY);
46	sysadm	1.13	sin.sin_port = htons(port);
47
48			if (bind(socket_server, (struct sockaddr *)&sin, sizeof(sin)) < 0)
49	sysadm	1.10	{
50	sysadm	1.13	log_error("Bind address %s:%u failed\n",
51			inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
52			exit(2);
53	sysadm	1.10	}
54
55	sysadm	1.13	if (listen(socket_server, 10) < 0)
56	sysadm	1.10	{
57	sysadm	1.13	log_error("Socket listen failed\n");
58			exit(3);
59	sysadm	1.10	}
60	sysadm	1.1
61	sysadm	1.16	strncpy(hostaddr_server, inet_ntoa(sin.sin_addr), sizeof(hostaddr_server) - 1);
62			hostaddr_server[sizeof(hostaddr_server) - 1] = '\0';
63
64	sysadm	1.13	port_server = ntohs(sin.sin_port);
65
66			log_std("Listening at %s:%d\n", hostaddr_server, port_server);
67
68			namelen = sizeof(sin);
69			while (!SYS_exit)
70			{
71			FD_ZERO(&testfds);
72			FD_SET(socket_server, &testfds);
73
74			timeout.tv_sec = 1;
75			timeout.tv_usec = 0;
76
77			result = SignalSafeSelect(FD_SETSIZE, &testfds, NULL, NULL, &timeout);
78			if (result < 0)
79			{
80			log_error("Accept connection error\n");
81			continue;
82			}
83
84			if (result == 0)
85			{
86			continue;
87			}
88
89			if (FD_ISSET(socket_server, &testfds))
90			{
91			flags = fcntl(socket_server, F_GETFL, 0);
92			fcntl(socket_server, F_SETFL, flags \| O_NONBLOCK);
93			while ((socket_client =
94			accept(socket_server, (struct sockaddr *)&sin, &namelen)) < 0)
95			{
96			if (errno != EWOULDBLOCK && errno != ECONNABORTED && errno != EINTR)
97			{
98			log_error("Accept connection error\n");
99			break;
100			}
101			}
102			fcntl(socket_server, F_SETFL, flags);
103			}
104
105			if (socket_client < 0)
106			{
107			log_error("Accept connection error\n");
108			continue;
109			}
110
111	sysadm	1.16	strncpy(hostaddr_client, inet_ntoa(sin.sin_addr), sizeof(hostaddr_client) - 1);
112			hostaddr_client[sizeof(hostaddr_client) - 1] = '\0';
113
114	sysadm	1.13	port_client = ntohs(sin.sin_port);
115
116			log_std("Accept connection from %s:%d\n", hostaddr_client,
117			port_client);
118
119			if (fork_server() < 0)
120			{
121			log_error("Fork error\n");
122			}
123
124			if (close(socket_client) == -1)
125			{
126			log_error("Close client socket failed\n");
127			}
128			}
129
130			if (close(socket_server) == -1)
131			{
132			log_error("Close server socket failed\n");
133			}
134	sysadm	1.7
135	sysadm	1.13	return 0;
136	sysadm	1.1	}
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