libdhcpagent/common/dhcpagent_ipc.c

48  * the protocol used here is a simple request/reply scheme: a client
55  * the format of a request consists of a single dhcp_ipc_request_t;
88  *   input: dhcp_ipc_type_t: the type of ipc request to allocate
89  *	    const char *: the interface to associate the request with
93  *  output: dhcp_ipc_request_t *: the request on success, NULL on failure
100 	dhcp_ipc_request_t *request = calloc(1, DHCP_IPC_REQUEST_SIZE +
103 	if (request == NULL)
106 	request->message_type   = type;
107 	request->data_length    = buffer_size;
108 	request->data_type	= data_type;
111 		(void) strlcpy(request->ifname, ifname, LIFNAMSIZ);
114 		(void) memcpy(request->buffer, buffer, buffer_size);
116 	return (request);
122  *   input: dhcp_ipc_request_t *: the request the reply is for
131 dhcp_ipc_alloc_reply(dhcp_ipc_request_t *request, int return_code,
139 	reply->message_type	= request->message_type;
140 	reply->ipc_id		= request->ipc_id;
229  * dhcp_ipc_recv_request(): gets a request using the agent's ipc protocol
232  *	    dhcp_ipc_request_t **: address of a pointer to store the request
239 dhcp_ipc_recv_request(int fd, dhcp_ipc_request_t **request, int msec)
243 	retval = dhcp_ipc_recv_msg(fd, (void **)request, DHCP_IPC_REQUEST_SIZE,
248 		(*request)->ifname[LIFNAMSIZ - 1] = '\0';
274 	 * original request, so the only time we give up is when the daemon is
278 	 * so it's unlikely that any request will actually be that long, and
279 	 * it's unlikely that anyone will care if we wait forever on a request
335  * dhcp_ipc_send_request(): transmits a request using the agent's ipc protocol
338  *	    dhcp_ipc_request_t *: the request to send
343 dhcp_ipc_send_request(int fd, dhcp_ipc_request_t *request)
351 	request->ipc_id = gethrtime();
353 	return (dhcp_ipc_send_msg(fd, request, DHCP_IPC_REQUEST_SIZE +
354 	    request->data_length));
358  * dhcp_ipc_make_request(): sends the provided request to the agent and reaps
361  *   input: dhcp_ipc_request_t *: the request to make
369 dhcp_ipc_make_request(dhcp_ipc_request_t *request, dhcp_ipc_reply_t **reply,
401 	request->timeout = timeout;
403 	retval = dhcp_ipc_send_request(fd, request);
650 		error_string = "DHCP server refused request";
670  * dhcp_string_to_request(): maps a string into a request code
673  *   output: dhcp_ipc_type_t: the request code, or -1 if unknown
677 dhcp_string_to_request(const char *request)
682 		if (strcmp(ipc_typestr[i], request) == 0)
720 	dhcp_ipc_request_t	*request;
732 	request = dhcp_ipc_alloc_request(DHCP_GET_TAG, "", optnum,
735 	if (request == NULL) {
746 		(void) strlcpy(request->ifname, ifnames, LIFNAMSIZ);
747 		retval = dhcp_ipc_make_request(request, &reply, 0);
770 	free(request);
851 	dhcp_ipc_request_t	*request;
910 	request = dhcp_ipc_alloc_request(DHCP_INFORM, "", NULL, 0,
912 	if (request == NULL) {
920 		(void) strlcpy(request->ifname, ifnames_copy, LIFNAMSIZ);
921 		if (dhcp_ipc_make_request(request, &reply, 0) == 0)
945 	request->message_type = DHCP_DROP;
950 		(void) strlcpy(request->ifname, ifnames_copy, LIFNAMSIZ);
951 		if (dhcp_ipc_make_request(request, &reply, 0) == 0)
955 	free(request);