80 lines
1.4 KiB
C
80 lines
1.4 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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// 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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void putstr(int fd, char *str) {
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write(fd, str, strlen(str));
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}
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void error(char *str) {
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putstr(2, str);
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exit(1);
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}
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int main(int ac, char **av) {
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int port;
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int server_fd;
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int client_fd;
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char buf[1024];
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struct sockaddr_in addr;
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socklen_t len;
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fd_set fds;
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if (ac != 2)
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error("Wrong number of arguments\n");
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if ( (port = atoi(av[1])) == -1)
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error("Fatal error\n");
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if ( (server_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
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error("Fatal error\n");
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bzero(&addr, sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_addr.s_addr = htonl(2130706433); //127.0.0.1
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addr.sin_port = htons(port);
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len = sizeof(addr);
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if (bind(server_fd, (const struct sockaddr *)&addr, len) == -1)
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error("Fatal error\n");
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if (listen(server_fd, 10) == -1)
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error("Fatal error\n");
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while (1) {
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if ( (client_fd = accept(server_fd, (struct sockaddr *)&addr, &len)) == -1)
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error("Fatal error\n");
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FD_ZERO(&fds);
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FD_SET(client_fd, &fds);
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select(client_fd + 1, &fds, NULL, NULL, NULL);
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if (FD_ISSET(client_fd, &fds))
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recv(client_fd, buf, 1024, 0);
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}
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return (0);
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}
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