Wed, 09 Apr 2014 12:07:47 +0200
added nonblocking read for network games + minor build system fixes
1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2014 Mike Becker. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 */
30 #include <stdlib.h>
31 #include <string.h>
32 #include <fcntl.h>
33 #include "network.h"
35 #define new_socket() socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
37 int net_create(Server *server, char* port) {
38 server->info = NULL;
40 struct sockaddr_in addr;
41 addr.sin_family = AF_INET;
42 addr.sin_addr.s_addr = INADDR_ANY;
43 addr.sin_port = htons(atoi(port));
45 server->fd = new_socket();
46 if (server->fd > -1) {
47 int true = 1;
48 setsockopt(server->fd, SOL_SOCKET, SO_REUSEADDR, &true, sizeof(int));
49 if (bind(server->fd, (struct sockaddr*)&addr, sizeof(addr))) {
50 server->fd = -1;
51 return 1;
52 } else {
53 return 0;
54 }
55 } else {
56 return 1;
57 }
58 }
60 int getaddrinfo_intrnl(char *host, char *port, struct addrinfo **info) {
61 struct addrinfo hints;
62 memset(&hints, 0, sizeof(hints));
63 hints.ai_socktype = SOCK_STREAM;
64 hints.ai_protocol = IPPROTO_TCP;
66 return getaddrinfo(host, port, &hints, info);
67 }
69 int net_find(Server *server, char *host, char* port) {
70 memset(server, 0, sizeof(Server));
71 server->fd = -1;
73 return getaddrinfo_intrnl(host, port, &(server->info));
74 }
76 int net_listen(Server *server) {
77 listen(server->fd, 1);
78 Client* client = calloc(1, sizeof(Client));
79 client->fd = -1;
80 server->client = client;
82 client->fd = accept(server->fd,
83 &(client->address), &(client->address_len));
85 return client->fd == -1;
86 }
88 int net_connect(Server *server) {
90 Client* client = calloc(1, sizeof(Client));
91 client->fd = -1;
92 server->fd = new_socket();
93 server->client = client;
95 if (server->fd == -1) {
96 return 1;
97 }
99 return connect(server->fd, server->info->ai_addr, server->info->ai_addrlen);
100 }
102 int net_destroy(Server *server) {
103 if (server->info) {
104 freeaddrinfo(server->info);
105 }
106 if (server->client) {
107 shutdown(server->client->fd, SHUT_RDWR);
108 free(server->client);
109 }
110 if (server->fd > -1) {
111 return shutdown(server->fd, SHUT_RDWR);
112 }
114 return EXIT_SUCCESS;
115 }
117 void net_send_code(int socket, uint8_t code) {
118 send(socket, &code, sizeof(uint8_t), 0);
119 }
121 void net_send_data(int socket, uint8_t code, void *data, size_t len) {
122 uint8_t pkg[len+1];
123 pkg[0] = code;
124 memcpy(pkg+1, data, len);
125 send(socket, pkg, len+1, 0);
126 }
128 uint8_t net_recieve_code(int socket) {
129 uint8_t code;
130 recv(socket, &code, sizeof(uint8_t), 0);
131 return code;
132 }
134 void net_recieve_data(int socket, void *data, size_t len) {
135 recv(socket, data, len, 0);
136 }
138 int net_setnonblocking(int socket, _Bool nonblocking) {
139 int opts = fcntl(socket, F_GETFL);
140 if (opts < 0) {
141 return 1;
142 }
144 if (nonblocking) {
145 opts |= O_NONBLOCK;
146 } else {
147 opts &= ~O_NONBLOCK;
148 }
149 if (fcntl(socket, F_SETFL, opts) < 0) {
150 return 1;
151 }
153 return 0;
154 }