Stephen Seo
13ccc1b3bd
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113 lines
3.1 KiB
C
113 lines
3.1 KiB
C
// ISC License
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//
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// Copyright (c) 2024 Stephen Seo
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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#include "tcp_socket.h"
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// Standard library includes.
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#include <stdio.h>
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#include <string.h>
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// Unix includes.
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <errno.h>
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#include <unistd.h>
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// Local includes.
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#include "big_endian.h"
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int create_tcp_socket(uint16_t port) {
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struct sockaddr_in6 ipv6_addr;
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memset(&ipv6_addr, 0, sizeof(struct sockaddr_in6));
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ipv6_addr.sin6_family = AF_INET6;
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ipv6_addr.sin6_port = u16_be_swap(port);
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ipv6_addr.sin6_addr = in6addr_any;
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int tcp_socket = socket(AF_INET6, SOCK_STREAM | SOCK_NONBLOCK, 6);
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if (tcp_socket == -1) {
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switch (errno) {
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case EACCES:
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puts("ERROR: Socket creation: EACCES");
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break;
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case EAFNOSUPPORT:
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puts("ERROR: Socket creation: EAFNOSUPPORT");
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break;
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case EINVAL:
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puts("ERROR: Socket creation: EINVAL");
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break;
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case EMFILE:
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puts("ERROR: Socket creation: EMFILE");
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break;
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case ENOBUFS:
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puts("ERROR: Socket creation: ENOBUFS");
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break;
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case ENOMEM:
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puts("ERROR: Socket creation: ENOMEM");
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break;
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case EPROTONOSUPPORT:
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puts("ERROR: Socket creation: EPROTONOSUPPORT");
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break;
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default:
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puts("ERROR: Socket creation: Unknown Error");
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break;
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}
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return -1;
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}
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int ret = bind(tcp_socket,
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(const struct sockaddr *)&ipv6_addr,
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sizeof(struct sockaddr_in6));
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if (ret != 0) {
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close(tcp_socket);
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puts("ERROR: Failed to bind socket! (Maybe just attempted to reuse socket "
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"that didn't get \"cleaned up\" yet? Use different port?)");
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return -1;
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}
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ret = listen(tcp_socket, C_SIMPLE_HTTP_TCP_SOCKET_BACKLOG);
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if (ret == 0) {
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return tcp_socket;
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} else {
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switch (errno) {
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case EADDRINUSE:
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puts("ERROR: Socket listen: EADDRINUSE");
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break;
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case EBADF:
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puts("ERROR: Socket listen: EBADF");
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break;
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case ENOTSOCK:
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puts("ERROR: Socket listen: ENOTSOCK");
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break;
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default:
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puts("ERROR: Socket listen: Unknown Error");
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break;
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}
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return -1;
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}
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}
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void cleanup_tcp_socket(int *tcp_socket) {
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if (tcp_socket && *tcp_socket >= 0) {
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close(*tcp_socket);
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*tcp_socket = -1;
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}
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}
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// vim: et ts=2 sts=2 sw=2
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