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 <netinet/in.h>
#include <arpa/inet.h>

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