Function sys_getaddrinfo

components/lwp/lwp_syscall.c:7051–7215

* @brief Resolves network addresses and service names into a list of address structures. * * This function provides a mechanism for resolving a host name and service name (or port number) * into a list of address structures suitable for use with socket-based communication. The function * can handle both IPv4 and IPv6 addresses and provides a flexible way to specify different types * of addres

 * @see freeaddrinfo(), sys_socket(), sys_connect(), sys_gethostbyname(), sys_gethostbyaddr()
 */
sysret_t sys_getaddrinfo(const char *nodename,
        const char *servname,
        const struct musl_addrinfo *hints,
        struct musl_addrinfo *res)
{
    int ret = -1;
    struct addrinfo *k_res = NULL;
    char *k_nodename = NULL;
    char *k_servname = NULL;
    struct addrinfo *k_hints = NULL;
#ifdef ARCH_MM_MMU
    int len = 0;
#endif

#ifdef ARCH_MM_MMU
    if (!lwp_user_accessable((void *)res, sizeof(*res)))
    {
        SET_ERRNO(EFAULT);
        goto exit;
    }
#endif
    if (nodename)
    {
#ifdef ARCH_MM_MMU
        len = lwp_user_strlen(nodename);
        if (len <= 0)
        {
            SET_ERRNO(EFAULT);
            goto exit;
        }

        k_nodename = (char *)kmem_get(len + 1);
        if (!k_nodename)
        {
            SET_ERRNO(ENOMEM);
            goto exit;
        }

        if (lwp_get_from_user(k_nodename, (void *)nodename, len + 1) != len + 1)
        {
            SET_ERRNO(EFAULT);
            goto exit;
        }
#else
        k_nodename = rt_strdup(nodename);
        if (!k_nodename)
        {
            SET_ERRNO(ENOMEM);
            goto exit;
        }
#endif
    }
    if (servname)
    {
#ifdef ARCH_MM_MMU
        len = lwp_user_strlen(servname);
        if (len <= 0)
        {