src/network.c

Sat, 12 Apr 2014 13:42:57 +0200

author
Mike Becker <universe@uap-core.de>
date
Sat, 12 Apr 2014 13:42:57 +0200
changeset 38
75ee459ba941
parent 34
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child 45
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permissions
-rw-r--r--

fixed memory underflow bug in mvwasyncgetnstr

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2014 Mike Becker. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 *
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28 */
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29
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30 #include <stdlib.h>
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31 #include <string.h>
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32 #include <fcntl.h>
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33 #include "network.h"
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34
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35 #define new_socket() socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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36
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37 int net_create(Server *server, char* port) {
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38 server->info = NULL;
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39
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40 struct sockaddr_in addr;
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41 addr.sin_family = AF_INET;
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42 addr.sin_addr.s_addr = INADDR_ANY;
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43 addr.sin_port = htons(atoi(port));
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44
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45 server->fd = new_socket();
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46 if (server->fd > -1) {
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47 int true = 1;
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48 setsockopt(server->fd, SOL_SOCKET, SO_REUSEADDR, &true, sizeof(int));
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49 if (bind(server->fd, (struct sockaddr*)&addr, sizeof(addr))) {
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50 server->fd = -1;
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51 return 1;
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52 } else {
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53 return 0;
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54 }
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55 } else {
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56 return 1;
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57 }
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58 }
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59
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60 int getaddrinfo_intrnl(char *host, char *port, struct addrinfo **info) {
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61 struct addrinfo hints;
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62 memset(&hints, 0, sizeof(hints));
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63 hints.ai_socktype = SOCK_STREAM;
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64 hints.ai_protocol = IPPROTO_TCP;
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65
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66 return getaddrinfo(host, port, &hints, info);
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67 }
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68
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69 int net_find(Server *server, char *host, char* port) {
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70 memset(server, 0, sizeof(Server));
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71 server->fd = -1;
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72
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73 return getaddrinfo_intrnl(host, port, &(server->info));
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74 }
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75
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76 int net_listen(Server *server) {
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77 listen(server->fd, 1);
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78 Client* client = calloc(1, sizeof(Client));
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79 client->fd = -1;
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80 server->client = client;
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81
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82 client->fd = accept(server->fd,
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83 &(client->address), &(client->address_len));
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84
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85 return client->fd == -1;
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86 }
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87
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88 int net_connect(Server *server) {
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89
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90 Client* client = calloc(1, sizeof(Client));
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91 client->fd = -1;
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92 server->fd = new_socket();
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93 server->client = client;
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94
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95 if (server->fd == -1) {
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96 return 1;
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97 }
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98
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99 return connect(server->fd, server->info->ai_addr, server->info->ai_addrlen);
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100 }
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101
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102 int net_destroy(Server *server) {
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103 if (server->info) {
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104 freeaddrinfo(server->info);
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105 }
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106 if (server->client) {
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107 shutdown(server->client->fd, SHUT_RDWR);
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108 free(server->client);
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109 }
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110 if (server->fd > -1) {
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111 return shutdown(server->fd, SHUT_RDWR);
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112 }
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113
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114 return EXIT_SUCCESS;
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115 }
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116
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117 void net_send_code(int socket, uint8_t code) {
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118 send(socket, &code, sizeof(uint8_t), 0);
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119 }
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120
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121 void net_send_data(int socket, uint8_t code, void *data, size_t len) {
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122 uint8_t pkg[len+1];
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123 pkg[0] = code;
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124 memcpy(pkg+1, data, len);
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125 send(socket, pkg, len+1, 0);
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126 }
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127
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128 uint8_t net_recieve_code(int socket) {
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129 uint8_t code;
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130 recv(socket, &code, sizeof(uint8_t), 0);
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131 return code;
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132 }
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133
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134 void net_recieve_data(int socket, void *data, size_t len) {
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135 recv(socket, data, len, 0);
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136 }
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137
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138 int net_setnonblocking(int socket, _Bool nonblocking) {
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139 int opts = fcntl(socket, F_GETFL);
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140 if (opts < 0) {
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141 return 1;
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142 }
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143
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144 if (nonblocking) {
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145 opts |= O_NONBLOCK;
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146 } else {
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parents: 22
diff changeset
147 opts &= ~O_NONBLOCK;
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parents: 22
diff changeset
148 }
c4d4b8a8f902 added nonblocking read for network games + minor build system fixes
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parents: 22
diff changeset
149 if (fcntl(socket, F_SETFL, opts) < 0) {
c4d4b8a8f902 added nonblocking read for network games + minor build system fixes
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parents: 22
diff changeset
150 return 1;
c4d4b8a8f902 added nonblocking read for network games + minor build system fixes
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parents: 22
diff changeset
151 }
c4d4b8a8f902 added nonblocking read for network games + minor build system fixes
Mike Becker <universe@uap-core.de>
parents: 22
diff changeset
152
c4d4b8a8f902 added nonblocking read for network games + minor build system fixes
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parents: 22
diff changeset
153 return 0;
c4d4b8a8f902 added nonblocking read for network games + minor build system fixes
Mike Becker <universe@uap-core.de>
parents: 22
diff changeset
154 }

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