lbbs/src/net_server.c

/***************************************************************************
                                                  net_server.c  -  description
                                                         -------------------
        begin                : Mon Oct 11 2004
        copyright            : (C) 2004 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 2 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			begin : Mon Oct 11 2004
5			copyright : (C) 2004 by Leaflet
6			email : leaflet@leafok.com
7	sysadm	1.1	***************************************************************************/
8
9			/***************************************************************************
10			* *
11			* This program is free software; you can redistribute it and/or modify *
12			* it under the terms of the GNU General Public License as published by *
13			* the Free Software Foundation; either version 2 of the License, or *
14			* (at your option) any later version. *
15			* *
16			***************************************************************************/
17
18	sysadm	1.14	#include "net_server.h"
19	sysadm	1.1	#include "common.h"
20	sysadm	1.14	#include "log.h"
21	sysadm	1.7	#include "io.h"
22	sysadm	1.14	#include "fork.h"
23	sysadm	1.11	#include "tcplib.h"
24	sysadm	1.7	#include <sys/socket.h>
25	sysadm	1.9	#include <arpa/inet.h>
26	sysadm	1.3
27	sysadm	1.17	int net_server(const char *hostaddr, in_port_t port)
28	sysadm	1.1	{
29	sysadm	1.15	unsigned int namelen;
30			int result;
31			int flags;
32	sysadm	1.13	struct sockaddr_in sin;
33			fd_set testfds;
34			struct timeval timeout;
35	sysadm	1.10
36	sysadm	1.13	socket_server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
37	sysadm	1.10
38	sysadm	1.13	if (socket_server < 0)
39			{
40			log_error("Create socket failed\n");
41			exit(1);
42			}
43	sysadm	1.10
44	sysadm	1.13	sin.sin_family = AF_INET;
45			sin.sin_addr.s_addr =
46	sysadm	1.16	(strnlen(hostaddr, sizeof(hostaddr)) > 0 ? inet_addr(hostaddr) : INADDR_ANY);
47	sysadm	1.13	sin.sin_port = htons(port);
48
49			if (bind(socket_server, (struct sockaddr *)&sin, sizeof(sin)) < 0)
50	sysadm	1.10	{
51	sysadm	1.13	log_error("Bind address %s:%u failed\n",
52			inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
53			exit(2);
54	sysadm	1.10	}
55
56	sysadm	1.13	if (listen(socket_server, 10) < 0)
57	sysadm	1.10	{
58	sysadm	1.13	log_error("Socket listen failed\n");
59			exit(3);
60	sysadm	1.10	}
61	sysadm	1.1
62	sysadm	1.16	strncpy(hostaddr_server, inet_ntoa(sin.sin_addr), sizeof(hostaddr_server) - 1);
63			hostaddr_server[sizeof(hostaddr_server) - 1] = '\0';
64
65	sysadm	1.13	port_server = ntohs(sin.sin_port);
66
67			log_std("Listening at %s:%d\n", hostaddr_server, port_server);
68
69			namelen = sizeof(sin);
70			while (!SYS_exit)
71			{
72			FD_ZERO(&testfds);
73			FD_SET(socket_server, &testfds);
74
75			timeout.tv_sec = 1;
76			timeout.tv_usec = 0;
77
78			result = SignalSafeSelect(FD_SETSIZE, &testfds, NULL, NULL, &timeout);
79			if (result < 0)
80			{
81			log_error("Accept connection error\n");
82			continue;
83			}
84
85			if (result == 0)
86			{
87			continue;
88			}
89
90			if (FD_ISSET(socket_server, &testfds))
91			{
92			flags = fcntl(socket_server, F_GETFL, 0);
93			fcntl(socket_server, F_SETFL, flags \| O_NONBLOCK);
94			while ((socket_client =
95			accept(socket_server, (struct sockaddr *)&sin, &namelen)) < 0)
96			{
97			if (errno != EWOULDBLOCK && errno != ECONNABORTED && errno != EINTR)
98			{
99			log_error("Accept connection error\n");
100			break;
101			}
102			}
103			fcntl(socket_server, F_SETFL, flags);
104			}
105
106			if (socket_client < 0)
107			{
108			log_error("Accept connection error\n");
109			continue;
110			}
111
112	sysadm	1.16	strncpy(hostaddr_client, inet_ntoa(sin.sin_addr), sizeof(hostaddr_client) - 1);
113			hostaddr_client[sizeof(hostaddr_client) - 1] = '\0';
114
115	sysadm	1.13	port_client = ntohs(sin.sin_port);
116
117			log_std("Accept connection from %s:%d\n", hostaddr_client,
118			port_client);
119
120			if (fork_server() < 0)
121			{
122			log_error("Fork error\n");
123			}
124
125			if (close(socket_client) == -1)
126			{
127			log_error("Close client socket failed\n");
128			}
129			}
130
131			if (close(socket_server) == -1)
132			{
133			log_error("Close server socket failed\n");
134			}
135	sysadm	1.7
136	sysadm	1.13	return 0;
137	sysadm	1.1	}
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