source: benchmark/io/http/socket.cfa@ b51b2a6

#define _GNU_SOURCE

#include "socket.hfa"

#include <errno.h>
#include <string.h>
extern "C" {
        #include <sys/socket.h>
        #include <netinet/in.h>
        #include <netinet/tcp.h>
}

#include <fstream.hfa>
#include <time.hfa>
#include <thread.hfa>

#include "options.hfa"

int prepaddr(struct sockaddr_in & address) {
        int addrlen = sizeof(address);
        memset( (char *)&address, '\0', addrlen );
        address.sin_family = AF_INET;
        address.sin_addr.s_addr = htonl(INADDR_ANY);
        address.sin_port = htons( options.socket.port );
        return addrlen;
}

int listener(struct sockaddr_in & address, int addrlen) {
        int type = SOCK_STREAM;
        // if(options.socket.reuseport) type |= SOCK_NONBLOCK;
        int sockfd = socket(AF_INET, type, 0);
        if(sockfd < 0) {
                abort( "socket error: (%d) %s\n", (int)errno, strerror(errno) );
        }

        int on = 1;
        const struct linger l = { 1, 0 };
        if (setsockopt(sockfd, SOL_SOCKET, SO_LINGER, &l, sizeof(l)) < 0)
                abort( "setsockopt SO_LINGER error: (%d) %s\n", (int)errno, strerror(errno) );

        if (setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, (const void*)&on, sizeof(on)) < 0)
                abort( "setsockopt SO_LINGER error: (%d) %s\n", (int)errno, strerror(errno) );

        if(options.socket.reuseport) {
                // if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const void*)&on, sizeof(on)))
                //      abort( "setsockopt SO_REUSEADDR error: (%d) %s\n", (int)errno, strerror(errno) );
                if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEPORT, &on, sizeof(on)) < 0)
                        abort( "setsockopt SO_REUSEPORT error: (%d) %s\n", (int)errno, strerror(errno) );
        }

        int ret = 0;
        int waited = 0;
        for() {
                __CONST_SOCKADDR_ARG addr;
                addr.__sockaddr__ = (struct sockaddr *)&address;
                socklen_t addrlen = sizeof(address);
                ret = bind( sockfd, addr, addrlen );
                if(ret < 0) {
                        if(errno == EADDRINUSE) {
                                if(waited == 0) {
                                        if(!options.interactive) abort | "Port already in use in non-interactive mode. Aborting";
                                        sout | "Waiting for port";
                                } else {
                                        sout | "\r" | waited | nonl;
                                        flush( sout );
                                }
                                waited ++;
                                sleep( 1`s );
                                continue;
                        }
                        abort( "bind error: (%d) %s\n", (int)errno, strerror(errno) );
                }
                break;
        }

        ret = listen( sockfd, options.socket.backlog );
        if(ret < 0) {
                abort( "listen error: (%d) %s\n", (int)errno, strerror(errno) );
        }

        return sockfd;
}