Function bind_socket_ai

src/commons/support/events.cpp:126–175

Create a non-blocking socket and bind it */ todo: rename this function */

/* Create a non-blocking socket and bind it */
/* todo: rename this function */
static evutil_socket_t bind_socket_ai(struct evutil_addrinfo* ai, int reuse) {
    evutil_socket_t fd;

    int on = 1, r;

    /* Create listen socket */
    fd = evutil_socket_(ai ? ai->ai_family : AF_INET,
                        SOCK_STREAM | EVUTIL_SOCK_NONBLOCK | EVUTIL_SOCK_CLOEXEC, 0);
    if (fd == -1) {
        // event_sock_warn(-1, "socket");
        return (-1);
    }

    if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void*)&on, sizeof(on)) < 0) {
        LogPrint(BCLog::ERROR, "bind_socket_ai setsockopt(%d, SOL_SOCKET, SO_KEEPALIVE) failed\n", fd);
        evutil_closesocket(fd);
        return (-1);
    }

    if (evutil_make_listen_socket_reuseable(fd) < 0) {
        LogPrint(BCLog::ERROR, "bind_socket_ai evutil_make_listen_socket_reuseable failed\n");
        evutil_closesocket(fd);
        return (-1);
    }

#if defined(IPV6_V6ONLY)
    int ai_family = ai ? ai->ai_family : AF_INET;
    // AF_INET6
    if (ai_family == PF_INET6) {
        on = 1;
        if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&on, (ev_socklen_t)sizeof(on)) < 0) {
            LogPrint(BCLog::ERROR, "bind_socket_ai evutil_make_listen_socket_ipv6only failed\n");
            return (-1);
        }
    }
#endif

    if (ai != NULL) {
        r = bind(fd, ai->ai_addr, (ev_socklen_t)ai->ai_addrlen);
        if (r == -1) {
            int serrno = EVUTIL_SOCKET_ERROR();
            LogPrint(BCLog::ERROR, "bind_socket_ai bind failed, err: %s\n",
                     evutil_socket_error_to_string(serrno));
            evutil_closesocket(fd);
            return (-1);
        }
    }

    return (fd);
}

static evutil_socket_t bind_socket(const char* address, ev_uint16_t port, int reuse) {
    evutil_socket_t fd;