84 lines
1.7 KiB
C++
84 lines
1.7 KiB
C++
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#include <sys/wait.h>
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#include <signal.h>
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#define PORT "1337"
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#define BACKLOG 10 // pending connection queue
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void sigchld_handler(int s)
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{
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int saved_errno = errno;
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while (waitpid(-1, NULL, WNOHANG) > 0);
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errno = saved_errno;
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}
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void *get_in_addr(struct sockaddr *sa)
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{
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if (sa->sa_family == AF_INET)
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{
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return &(((struct sockaddr_in*)sa)->sin_addr);
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}
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}
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int main(void)
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{
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int sockfd, new_fd;
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struct addrinfo hints, *servinfo, *p;
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struct sockaddr_storage their_addr;
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socklen_t sin_size;
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struct sigaction sa;
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int yes = 1;
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char s[INET6_ADDRSTRLEN];
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int rv;
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_flags = AI_PASSIVE;
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if ((rv = getaddrinfo(NULL, PORT, &hints, &servinfo)) != 0)
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{
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fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
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return 1;
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}
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// Loop through all results until we bind
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for (p = servinfo; p != NULL; p = p->ai_next)
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{
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if ((sockfd = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1)
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{
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perror("server: socket");
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continue;
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}
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if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1)
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{
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perror("setsockopt");
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exit(1);
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}
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if (bind(sockfd, p->ai_addr, p->ai_addrlen) == -1)
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{
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close(sockfd);
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perror("server: bind");
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continue;
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}
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break;
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}
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freeaddrinfo(servinfo);
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}
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