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 "common.h"
#include "io.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)
{
        int namelen, seq, netint, result, flags;
        struct sockaddr_in sin;
        char temp[256];
        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 =
                (strlen(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);
        }

        strcpy(hostaddr_server, inet_ntoa(sin.sin_addr));
        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;
                }

                strcpy(hostaddr_client, (const char *)inet_ntoa(sin.sin_addr));
                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			#include "common.h"
19	sysadm	1.7	#include "io.h"
20	sysadm	1.11	#include "tcplib.h"
21	sysadm	1.7	#include <sys/socket.h>
22			#include <netinet/in.h>
23	sysadm	1.9	#include <arpa/inet.h>
24	sysadm	1.3
25	sysadm	1.13	int net_server(const char *hostaddr, unsigned int port)
26	sysadm	1.1	{
27	sysadm	1.13	int namelen, seq, netint, result, flags;
28			struct sockaddr_in sin;
29			char temp[256];
30			fd_set testfds;
31			struct timeval timeout;
32	sysadm	1.10
33	sysadm	1.13	socket_server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
34	sysadm	1.10
35	sysadm	1.13	if (socket_server < 0)
36			{
37			log_error("Create socket failed\n");
38			exit(1);
39			}
40	sysadm	1.10
41	sysadm	1.13	sin.sin_family = AF_INET;
42			sin.sin_addr.s_addr =
43			(strlen(hostaddr) > 0 ? inet_addr(hostaddr) : INADDR_ANY);
44			sin.sin_port = htons(port);
45
46			if (bind(socket_server, (struct sockaddr *)&sin, sizeof(sin)) < 0)
47	sysadm	1.10	{
48	sysadm	1.13	log_error("Bind address %s:%u failed\n",
49			inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
50			exit(2);
51	sysadm	1.10	}
52
53	sysadm	1.13	if (listen(socket_server, 10) < 0)
54	sysadm	1.10	{
55	sysadm	1.13	log_error("Socket listen failed\n");
56			exit(3);
57	sysadm	1.10	}
58	sysadm	1.1
59	sysadm	1.13	strcpy(hostaddr_server, inet_ntoa(sin.sin_addr));
60			port_server = ntohs(sin.sin_port);
61
62			log_std("Listening at %s:%d\n", hostaddr_server, port_server);
63
64			namelen = sizeof(sin);
65			while (!SYS_exit)
66			{
67			FD_ZERO(&testfds);
68			FD_SET(socket_server, &testfds);
69
70			timeout.tv_sec = 1;
71			timeout.tv_usec = 0;
72
73			result = SignalSafeSelect(FD_SETSIZE, &testfds, NULL, NULL, &timeout);
74			if (result < 0)
75			{
76			log_error("Accept connection error\n");
77			continue;
78			}
79
80			if (result == 0)
81			{
82			continue;
83			}
84
85			if (FD_ISSET(socket_server, &testfds))
86			{
87			flags = fcntl(socket_server, F_GETFL, 0);
88			fcntl(socket_server, F_SETFL, flags \| O_NONBLOCK);
89			while ((socket_client =
90			accept(socket_server, (struct sockaddr *)&sin, &namelen)) < 0)
91			{
92			if (errno != EWOULDBLOCK && errno != ECONNABORTED && errno != EINTR)
93			{
94			log_error("Accept connection error\n");
95			break;
96			}
97			}
98			fcntl(socket_server, F_SETFL, flags);
99			}
100
101			if (socket_client < 0)
102			{
103			log_error("Accept connection error\n");
104			continue;
105			}
106
107			strcpy(hostaddr_client, (const char *)inet_ntoa(sin.sin_addr));
108			port_client = ntohs(sin.sin_port);
109
110			log_std("Accept connection from %s:%d\n", hostaddr_client,
111			port_client);
112
113			if (fork_server() < 0)
114			{
115			log_error("Fork error\n");
116			}
117
118			if (close(socket_client) == -1)
119			{
120			log_error("Close client socket failed\n");
121			}
122			}
123
124			if (close(socket_server) == -1)
125			{
126			log_error("Close server socket failed\n");
127			}
128	sysadm	1.7
129	sysadm	1.13	return 0;
130	sysadm	1.1	}
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