Function udp_socket_create

libavformat/udp.c:363–403

}

static int udp_socket_create(URLContext *h, struct sockaddr_storage *addr,
                             socklen_t *addr_len, const char *localaddr)
{
    UDPContext *s = h->priv_data;
    int udp_fd = -1;
    struct addrinfo *res0, *res;
    int family = AF_UNSPEC;

    if (((struct sockaddr *) &s->dest_addr)->sa_family)
        family = ((struct sockaddr *) &s->dest_addr)->sa_family;
    res0 = ff_ip_resolve_host(h, (localaddr && localaddr[0]) ? localaddr : NULL,
                            s->local_port,
                            SOCK_DGRAM, family, AI_PASSIVE);
    if (!res0)
        goto fail;
    for (res = res0; res; res=res->ai_next) {
        if (s->udplite_coverage)
            udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, IPPROTO_UDPLITE, h);
        else
            udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, 0, h);
        if (udp_fd != -1) break;
        ff_log_net_error(h, AV_LOG_ERROR, "socket");
    }

    if (udp_fd < 0)
        goto fail;

    memcpy(addr, res->ai_addr, res->ai_addrlen);
    *addr_len = res->ai_addrlen;

    freeaddrinfo(res0);

    return udp_fd;

 fail:
    if (udp_fd >= 0)
        closesocket(udp_fd);
    if(res0)
        freeaddrinfo(res0);
    return -1;
}

static int udp_port(struct sockaddr_storage *addr, int addr_len)
{