84 lines
1.7 KiB
C
84 lines
1.7 KiB
C
#include "server.h"
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <sys/epoll.h>
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#include <sys/socket.h>
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#include <unistd.h>
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/*
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* Macros
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*/
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#define LISTEN_BACKLOG (2048)
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/*
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* Data
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*/
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static int _fd = -1;
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/*
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* Private API
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*/
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bool _accept() {
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close(accept(_fd, 0, 0));
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return true;
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}
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/*
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* Public API
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*/
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int server_open(const char* host, int port) {
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struct hostent *he = gethostbyname(host);
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if (!he) {
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fprintf(stderr, "[!] gethostbyname failed: %d (h_errno)\n", h_errno);
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return -1;
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}
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_fd = socket(
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AF_INET,
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SOCK_STREAM | SOCK_NONBLOCK,
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IPPROTO_TCP
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);
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if (_fd == -1) {
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fprintf(stderr, "[!] socket failed: %d\n", errno);
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return -1;
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}
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const int opt = 1;
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if (setsockopt(_fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
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close(_fd);
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fprintf(stderr, "[!] setsockopt failed: %d\n", errno);
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return -1;
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}
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struct sockaddr_in addr;
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addr.sin_family = AF_INET;
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addr.sin_port = htobe16(port);
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memcpy(&addr.sin_addr, he->h_addr, he->h_length);
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if (bind(_fd, (const void *)&addr, sizeof(addr)) == -1) {
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close(_fd);
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fprintf(stderr, "[!] bind failed: %d\n", errno);
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return -1;
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}
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if (listen(_fd, LISTEN_BACKLOG) == -1) {
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close(_fd);
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fprintf(stderr, "[!] listen failed: %d\n", errno);
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return -1;
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}
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return _fd;
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}
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void server_close() {
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shutdown(_fd, SHUT_RDWR);
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close(_fd);
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}
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bool server_event(uint32_t events) {
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if (events & EPOLLIN) {
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return _accept();
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}
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// we assume any event other than EPOLLIN is error
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return false;
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}
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