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)
{
        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	/***************************************************************************
2	net_server.c - description
3	-------------------
4	begin : Mon Oct 11 2004
5	copyright : (C) 2004 by Leaflet
6	email : leaflet@leafok.com
7	***************************************************************************/
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 "net_server.h"
19	#include "common.h"
20	#include "log.h"
21	#include "io.h"
22	#include "fork.h"
23	#include "tcplib.h"
24	#include <sys/socket.h>
25	#include <netinet/in.h>
26	#include <arpa/inet.h>
27
28	int net_server(const char *hostaddr, unsigned int port)
29	{
30	int namelen, seq, netint, result, flags;
31	struct sockaddr_in sin;
32	char temp[256];
33	fd_set testfds;
34	struct timeval timeout;
35
36	socket_server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
37
38	if (socket_server < 0)
39	{
40	log_error("Create socket failed\n");
41	exit(1);
42	}
43
44	sin.sin_family = AF_INET;
45	sin.sin_addr.s_addr =
46	(strlen(hostaddr) > 0 ? inet_addr(hostaddr) : INADDR_ANY);
47	sin.sin_port = htons(port);
48
49	if (bind(socket_server, (struct sockaddr *)&sin, sizeof(sin)) < 0)
50	{
51	log_error("Bind address %s:%u failed\n",
52	inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
53	exit(2);
54	}
55
56	if (listen(socket_server, 10) < 0)
57	{
58	log_error("Socket listen failed\n");
59	exit(3);
60	}
61
62	strcpy(hostaddr_server, inet_ntoa(sin.sin_addr));
63	port_server = ntohs(sin.sin_port);
64
65	log_std("Listening at %s:%d\n", hostaddr_server, port_server);
66
67	namelen = sizeof(sin);
68	while (!SYS_exit)
69	{
70	FD_ZERO(&testfds);
71	FD_SET(socket_server, &testfds);
72
73	timeout.tv_sec = 1;
74	timeout.tv_usec = 0;
75
76	result = SignalSafeSelect(FD_SETSIZE, &testfds, NULL, NULL, &timeout);
77	if (result < 0)
78	{
79	log_error("Accept connection error\n");
80	continue;
81	}
82
83	if (result == 0)
84	{
85	continue;
86	}
87
88	if (FD_ISSET(socket_server, &testfds))
89	{
90	flags = fcntl(socket_server, F_GETFL, 0);
91	fcntl(socket_server, F_SETFL, flags \| O_NONBLOCK);
92	while ((socket_client =
93	accept(socket_server, (struct sockaddr *)&sin, &namelen)) < 0)
94	{
95	if (errno != EWOULDBLOCK && errno != ECONNABORTED && errno != EINTR)
96	{
97	log_error("Accept connection error\n");
98	break;
99	}
100	}
101	fcntl(socket_server, F_SETFL, flags);
102	}
103
104	if (socket_client < 0)
105	{
106	log_error("Accept connection error\n");
107	continue;
108	}
109
110	strcpy(hostaddr_client, (const char *)inet_ntoa(sin.sin_addr));
111	port_client = ntohs(sin.sin_port);
112
113	log_std("Accept connection from %s:%d\n", hostaddr_client,
114	port_client);
115
116	if (fork_server() < 0)
117	{
118	log_error("Fork error\n");
119	}
120
121	if (close(socket_client) == -1)
122	{
123	log_error("Close client socket failed\n");
124	}
125	}
126
127	if (close(socket_server) == -1)
128	{
129	log_error("Close server socket failed\n");
130	}
131
132	return 0;
133	}
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