terminal-chess: src/network.c@e5fbb8f9edbe

     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 "network.h"

    34 int server_bind(Server *server) {

    35     server->fd = socket(server->info->ai_family,

    36         server->info->ai_socktype, server->info->ai_protocol);

    37     if (server->fd > -1) {

    38         int true = 1;

    39         setsockopt(server->fd, SOL_SOCKET, SO_REUSEADDR, &true, sizeof(int));

    40         if (bind(server->fd,

    41                 server->info->ai_addr, server->info->ai_addrlen)) {

    42             server->fd = -1;

    43             return 1;

    44         } else {

    45             return 0;

    46         }

    47     } else {

    48         return 1;

    49     }

    50 }

    52 int net_create(Server *server, char* port) {

    53     return net_find(server, "localhost", port) || server_bind(server);

    54 }

    56 int getaddrinfo_intrnl(char *host, char *port, struct addrinfo **info) {

    57     struct addrinfo hints;

    58     memset(&hints, 0, sizeof(hints));

    59     hints.ai_socktype = SOCK_STREAM;

    60     hints.ai_protocol = IPPROTO_TCP;

    62     return getaddrinfo(host, port, &hints, info);

    63 }

    65 int net_find(Server *server, char *host, char* port) {

    66     memset(server, 0, sizeof(Server));

    67     server->fd = -1;

    69     return getaddrinfo_intrnl(host, port, &(server->info));

    70 }

    72 int net_listen(Server *server) {

    73     listen(server->fd, 1);

    74     Client* client = calloc(1, sizeof(Client));

    75     client->fd = -1;

    76     server->client = client;

    78     client->fd = accept(server->fd,

    79         &(client->address), &(client->address_len));

    81     return client->fd == -1;

    82 }

    84 int net_connect(Server *server) {

    85     struct addrinfo *info;

    86     if (getaddrinfo_intrnl("localhost", NULL, &info)) {

    87         return 1;

    88     }

    90     Client* client = calloc(1, sizeof(Client));

    91     client->fd = socket(info->ai_family, info->ai_socktype, info->ai_protocol);

    92     server->client = client;

    94     freeaddrinfo(info);

    95     if (client->fd == -1) {

    96         return 1;

    97     }

    99     return connect(client->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 }

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