Created
May 12, 2018 09:02
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NEP Ue2
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| #include<sys/types.h> | |
| #include<stdio.h> | |
| #include<stdlib.h> | |
| #include<unistd.h> | |
| #include<string.h> | |
| #include<sys/socket.h> | |
| #include<netdb.h> | |
| extern void server_process(int); | |
| void main (int argc, char *argv[]){ | |
| struct addrinfo hints; | |
| struct addrinfo *results, *rp; | |
| struct sockaddr_storage peer_addr; | |
| int peer_addr_len; | |
| memset(&hints, 0, sizeof(hints)); | |
| int ret_val, main_sock, client_sock; | |
| if(argc != 2){ | |
| fprintf(stderr, "Usage: u2 <port>\n"); | |
| exit(EXIT_FAILURE); | |
| } | |
| hints.ai_family = AF_UNSPEC; //AFINET = ipv4, AFINET6 = ipv6 | |
| hints.ai_socktype = SOCK_STREAM; // SOCK_STREAM = tcp, SOCK_DGRAM = udp | |
| hints.ai_flags = AI_PASSIVE; //passive open = server | |
| ret_val = getaddrinfo(NULL, argv[1], &hints, &results); | |
| for(rp = results; rp != NULL; rp = rp->ai_next){ | |
| main_sock = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol); | |
| if(main_sock < 0){ | |
| continue; | |
| } | |
| if(bind(main_sock, rp->ai_addr, rp->ai_addrlen) == 0){ | |
| //bind successful | |
| break; | |
| }else{ | |
| close(main_sock); | |
| } | |
| } | |
| freeaddrinfo(results); | |
| if(rp == NULL){ | |
| // no configuration was successfully | |
| perror("bind"); | |
| exit(EXIT_FAILURE); | |
| } | |
| if(listen(main_sock, 10)){ | |
| perror("listen"); | |
| exit(EXIT_FAILURE); | |
| } | |
| for(;;){ | |
| peer_addr_len = sizeof(peer_addr); | |
| client_sock = accept(main_sock,(struct sockaddr*)&peer_addr,&peer_addr_len); | |
| if(client_sock < 0){ | |
| perror("accept"); | |
| exit(EXIT_FAILURE); | |
| } | |
| server_process(client_sock); | |
| close(client_sock); | |
| } | |
| } |
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