Function sys_bind

components/lwp/lwp_syscall.c:5162–5194

* @brief Binds a socket to a local address. * * This system call binds a socket to a specific local address and port. The socket must be created * using `sys_socket` before it can be bound. The `bind` operation allows the application to associate * a socket with a specific address, such as an IP address and port number, which can then be used * for sending or receiving data. * * @param[in]

 *          valid for the socket type.
 */
sysret_t sys_bind(int socket, const struct musl_sockaddr *name, socklen_t namelen)
{
    rt_err_t ret = 0;
    struct sockaddr sa;
    struct sockaddr_un un_addr;
    struct musl_sockaddr kname;
    rt_uint16_t family = 0;

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

    lwp_get_from_user(&family, (void *)name, 2);
    if (family == AF_UNIX)
    {
        lwp_get_from_user(&un_addr, (void *)name, sizeof(struct sockaddr_un));
        ret = bind(socket, (struct sockaddr *)&un_addr, namelen);
    }
    else if (family == AF_NETLINK)
    {
        lwp_get_from_user(&sa, (void *)name, namelen);
        ret = bind(socket, &sa, namelen);
    }
    else
    {
        lwp_get_from_user(&kname, (void *)name, namelen);
        sockaddr_tolwip(&kname, &sa);
        ret = bind(socket, &sa, namelen);
    }

    return (ret < 0 ? GET_ERRNO() : ret);
}

/**
 * @brief Shuts down part of a full-duplex connection.