Function sys_connect

components/lwp/lwp_syscall.c:5508–5540

* @brief Establishes a connection to a remote socket. * * This system call attempts to establish a connection to a remote socket specified by the `name` parameter. * It is typically used for client-side socket operations to connect to a server. The connection is established * by using the specified socket descriptor and the address of the remote server. * * @param[in] socket The socket de

 *          The `name` parameter must point to a valid `sockaddr` structure that contains a correctly formatted address.
 */
sysret_t sys_connect(int socket, const struct musl_sockaddr *name, socklen_t namelen)
{
    int ret = 0;
    rt_uint16_t family = 0;
    struct sockaddr sa;
    struct musl_sockaddr kname;
    struct sockaddr_un addr_un;

    if (!lwp_user_accessable((void *)name, namelen))
    {
        return -EFAULT;
    }

    lwp_get_from_user(&family, (void *)name, 2);
    if (family == AF_UNIX)
    {
        if (!lwp_user_accessable((void *)name, sizeof(struct sockaddr_un)))
        {
            return -EFAULT;
        }

        lwp_get_from_user(&addr_un, (void *)name, sizeof(struct sockaddr_un));
        ret = connect(socket, (struct sockaddr *)(&addr_un), namelen);
    }
    else
    {
        lwp_get_from_user(&kname, (void *)name, namelen);
        sockaddr_tolwip(&kname, &sa);
        ret = connect(socket, &sa, namelen);
    }

    return ret;
}

/**
 * @brief Prepares a socket to accept incoming connection requests.