150 lines
2.5 KiB
C
150 lines
2.5 KiB
C
#include <errno.h>
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#include <netdb.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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// accept
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// atoi
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// bind
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// bzero
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// calloc
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// close
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// exit
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// free
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// listen
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// malloc
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// memset
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// realloc
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// recv
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// select
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// send
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// socket
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// sprintf
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// strcat
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// strcpy
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// strlen
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// strstr
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// write
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#define BUFSIZE 1024
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typedef struct s_client {
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int fd;
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int id;
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char *msg;
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struct s_client *next;
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} t_client;
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void error(char *msg) {
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write(2, msg, strlen(msg));
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exit(1);
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}
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int extract_message(char **buf, char **msg)
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{
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char *newbuf;
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int i;
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*msg = 0;
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if (*buf == 0)
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return (0);
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i = 0;
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while ((*buf)[i])
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{
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if ((*buf)[i] == '\n')
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{
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newbuf = calloc(1, sizeof(*newbuf) * (strlen(*buf + i + 1) + 1));
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if (newbuf == 0)
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return (-1);
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strcpy(newbuf, *buf + i + 1);
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*msg = *buf;
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(*msg)[i + 1] = 0;
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*buf = newbuf;
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return (1);
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}
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i++;
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}
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return (0);
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}
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char *str_join(char *buf, char *add)
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{
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char *newbuf;
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int len;
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if (buf == 0)
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len = 0;
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else
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len = strlen(buf);
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newbuf = malloc(sizeof(*newbuf) * (len + strlen(add) + 1));
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if (newbuf == 0)
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return (0);
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newbuf[0] = 0;
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if (buf != 0)
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strcat(newbuf, buf);
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free(buf);
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strcat(newbuf, add);
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return (newbuf);
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}
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int main(int ac, char **av) {
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int sockfd;
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int client_fd;
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int maxfd;
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struct sockaddr_in servaddr;
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fd_set read_set;
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fd_set write_set;
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t_client *client;
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t_client *first_client;
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if (ac != 2)
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error("Wrong number of arguments\n");
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client = NULL;
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first_client = client;
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// socket create and verification
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sockfd = socket(AF_INET, SOCK_STREAM, 0);
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if (sockfd == -1)
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error("Fatal error\n");
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bzero(&servaddr, sizeof(servaddr));
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// assign IP, PORT
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servaddr.sin_family = AF_INET;
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servaddr.sin_addr.s_addr = htonl(2130706433); //127.0.0.1
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servaddr.sin_port = htons(atoi(av[1]));
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// Binding newly created socket to given IP and verification
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if ((bind(sockfd, (const struct sockaddr *)&servaddr, sizeof(servaddr))) == -1)
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error("Fatal error\n");
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if (listen(sockfd, 10) == -1)
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error("Fatal error\n");
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while(1) {
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maxfd = sockfd;
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FD_ZERO(&read_set);
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FD_ZERO(&write_set);
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client = first_client;
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while(client) {
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FD_SET(client->fd, &read_set);
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FD_SET(client->fd, &write_set);
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if (client->fd > maxfd)
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maxfd = client_fd;
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client = client->next;
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}
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select(maxfd + 1, &read_set, &write_set, NULL, NULL);
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if (FD_ISSET(sockfd, &read_set)) {
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client_fd = accept(sockfd, NULL, NULL);
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}
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}
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return (0);
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}
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