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Reworked bnep_send().

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Some smaller fixes.
This commit is contained in:
ole.reinhardt@googlemail.com 2014-10-28 01:16:50 +00:00
parent 8aebd932dc
commit 69b6ff0287
2 changed files with 89 additions and 38 deletions
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119
src/bnep.c
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@ -67,6 +67,7 @@ static void (*app_packet_handler)(void * connection, uint8_t packet_type,
uint16_t channel, uint8_t *packet, uint16_t size);
static bnep_channel_t * bnep_channel_for_l2cap_cid(uint16_t l2cap_cid);
static void bnep_run(void);
/* Emit service registered event */
@ -94,7 +95,7 @@ static void bnep_emit_open_channel_complete(bnep_channel_t *channel, uint8_t sta
bt_store_16(event, 7, channel->max_frame_size);
BD_ADDR_COPY(&event[9], channel->remote_addr);
hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
(*app_packet_handler)(channel->connection, HCI_EVENT_PACKET, 0, (uint8_t *) event, sizeof(event));
(*app_packet_handler)(channel->connection, HCI_EVENT_PACKET, channel->l2cap_cid, (uint8_t *) event, sizeof(event));
}
static void bnep_emit_incoming_connection(bnep_channel_t *channel)
@ -108,7 +109,7 @@ static void bnep_emit_incoming_connection(bnep_channel_t *channel)
bt_store_16(event, 7, channel->max_frame_size);
BD_ADDR_COPY(&event[9], channel->remote_addr);
hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
(*app_packet_handler)(channel->connection, HCI_EVENT_PACKET, 0, (uint8_t *) event, sizeof(event));
(*app_packet_handler)(channel->connection, HCI_EVENT_PACKET, channel->l2cap_cid, (uint8_t *) event, sizeof(event));
}
static void bnep_emit_channel_closed(bnep_channel_t *channel)
@ -121,7 +122,16 @@ static void bnep_emit_channel_closed(bnep_channel_t *channel)
bt_store_16(event, 4, channel->uuid_dest);
BD_ADDR_COPY(&event[6], channel->remote_addr);
hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
(*app_packet_handler)(channel->connection, HCI_EVENT_PACKET, 0, (uint8_t *) event, sizeof(event));
(*app_packet_handler)(channel->connection, HCI_EVENT_PACKET, channel->l2cap_cid, (uint8_t *) event, sizeof(event));
}
static void bnep_emit_ready_to_send(bnep_channel_t *channel)
{
uint8_t event[2];
event[0] = BNEP_EVENT_READY_TO_SEND;
event[1] = sizeof(event) - 2;
hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
(*app_packet_handler)(channel->connection, HCI_EVENT_PACKET, channel->l2cap_cid, (uint8_t *) event, sizeof(event));
}
/* Send BNEP connection request */
@ -304,18 +314,41 @@ static int bnep_send_filter_multi_addr_response(bnep_channel_t *channel, uint16_
return err;
}
/* Send BNEP ethernet packet */
// TODO: Make static later?
int bnep_send(bnep_channel_t *channel, uint8_t *src_addr, uint8_t *dest_addr, uint16_t protocol_type, uint8_t *payload, uint16_t len)
int bnep_can_send_packet_now(uint16_t bnep_cid)
{
uint8_t *bnep_out_buffer = NULL;
uint16_t pos = 0;
int err = 0;
int has_src;
int has_dest;
bnep_channel_t *channel = bnep_channel_for_l2cap_cid(bnep_cid);
if (!channel){
log_error("bnep_can_send_packet_now cid 0x%02x doesn't exist!", bnep_cid);
return 0;
}
if (channel->state == BNEP_CHANNEL_STATE_CLOSED) {
return -1; // TODO
return l2cap_can_send_packet_now(channel->l2cap_cid);
}
/* Send BNEP ethernet packet */
int bnep_send(uint16_t bnep_cid, uint8_t *packet, uint16_t len)
{
bnep_channel_t *channel;
uint8_t *bnep_out_buffer = NULL;
uint16_t pos = 0;
uint16_t pos_out = 0;
int err = 0;
int has_source;
int has_dest;
bd_addr_t addr_dest;
bd_addr_t addr_source;
uint16_t network_protocol_type;
channel = bnep_channel_for_l2cap_cid(bnep_cid);
if (channel == NULL) {
log_error("bnep_can_send_packet_now cid 0x%02x doesn't exist!", bnep_cid);
return 1;
}
if (channel->state != BNEP_CHANNEL_STATE_CONNECTED) {
return BNEP_CHANNEL_NOT_CONNECTED;
}
/* Check for free ACL buffers */
@ -326,56 +359,65 @@ int bnep_send(bnep_channel_t *channel, uint8_t *src_addr, uint8_t *dest_addr, ui
l2cap_reserve_packet_buffer();
bnep_out_buffer = l2cap_get_outgoing_buffer();
/* Extract destination and source address from the ethernet packet */
pos = 0;
BD_ADDR_COPY(addr_dest, &packet[pos]);
pos += sizeof(bd_addr_t);
BD_ADDR_COPY(addr_source, &packet[pos]);
pos += sizeof(bd_addr_t);
network_protocol_type = READ_BT_16(packet, pos);
pos += sizeof(uint16_t);
/* Check if source address is the same as our local address and if the
destination address is the same as the remote addr. Maybe we can use
the compressed data format
*/
has_src = (memcmp(src_addr, channel->local_addr, ETHER_ADDR_LEN) != 0);
has_dest = (memcmp(dest_addr, channel->remote_addr, ETHER_ADDR_LEN) != 0);
has_source = (memcmp(addr_source, channel->local_addr, ETHER_ADDR_LEN) != 0);
has_dest = (memcmp(addr_dest, channel->remote_addr, ETHER_ADDR_LEN) != 0);
/* Fill in the package type depending on the given source and destination address */
if (has_src && has_dest) {
bnep_out_buffer[pos++] = BNEP_PKT_TYPE_GENERAL_ETHERNET;
if (has_source && has_dest) {
bnep_out_buffer[pos_out++] = BNEP_PKT_TYPE_GENERAL_ETHERNET;
} else
if (has_src && !has_dest) {
bnep_out_buffer[pos++] = BNEP_PKT_TYPE_COMPRESSED_ETHERNET_SOURCE_ONLY;
if (has_source && !has_dest) {
bnep_out_buffer[pos_out++] = BNEP_PKT_TYPE_COMPRESSED_ETHERNET_SOURCE_ONLY;
} else
if (!has_src && has_dest) {
bnep_out_buffer[pos++] = BNEP_PKT_TYPE_COMPRESSED_ETHERNET_DEST_ONLY;
if (!has_source && has_dest) {
bnep_out_buffer[pos_out++] = BNEP_PKT_TYPE_COMPRESSED_ETHERNET_DEST_ONLY;
} else {
bnep_out_buffer[pos++] = BNEP_PKT_TYPE_COMPRESSED_ETHERNET;
bnep_out_buffer[pos_out++] = BNEP_PKT_TYPE_COMPRESSED_ETHERNET;
}
/* Add the destination address if needed */
if (has_dest) {
BD_ADDR_COPY(bnep_out_buffer + pos, dest_addr);
pos += sizeof(bd_addr_t);
BD_ADDR_COPY(bnep_out_buffer + pos_out, addr_dest);
pos_out += sizeof(bd_addr_t);
}
/* Add the source address if needed */
if (has_src) {
BD_ADDR_COPY(bnep_out_buffer + pos, src_addr);
pos += sizeof(bd_addr_t);
if (has_source) {
BD_ADDR_COPY(bnep_out_buffer + pos_out, addr_source);
pos_out += sizeof(bd_addr_t);
}
/* Add protocol type */
bnep_out_buffer[pos++] = (protocol_type >> 8) & 0xFF;
bnep_out_buffer[pos++] = protocol_type & 0xFF;
bt_store_16(bnep_out_buffer, pos_out, network_protocol_type);
pos_out += 2;
/* TODO: Add extension headers, if we may support them at a later stage */
/* Check for MTU limits add the payload and then send out the package */
if (pos + len <= channel->max_frame_size) {
memcpy(bnep_out_buffer + pos, payload, len);
pos += len;
if (len - pos <= channel->max_frame_size) {
memcpy(bnep_out_buffer + pos_out, packet + pos, len - pos);
pos_out += len - pos;
err = l2cap_send_prepared(channel->l2cap_cid, pos);
err = l2cap_send_prepared(channel->l2cap_cid, pos_out);
} else {
// TODO: Error, MTU exceeded
return BNEP_DATA_LEN_EXCEEDS_MTU;
}
if (err) {
// TODO: Log error
log_info("bnep_send: error %d", err);
}
return err;
}
@ -953,7 +995,7 @@ static int bnep_hci_event_handler(uint8_t *packet, uint16_t size)
channel->l2cap_cid = l2cap_cid;
channel->con_handle = con_handle;
// TODO: Should we now send the connect request ?
/* Initiate the connection request */
channel->state = BNEP_CHANNEL_STATE_WAIT_FOR_CONNECTION_RESPONSE;
bnep_channel_state_add(channel, BNEP_CHANNEL_STATE_VAR_SND_CONNECTION_REQUEST);
channel->max_frame_size = bnep_max_frame_size_for_l2cap_mtu(READ_BT_16(packet, 17));
@ -1133,6 +1175,9 @@ static void bnep_channel_state_machine(bnep_channel_t* channel, bnep_channel_eve
bnep_send_filter_multi_addr_response(channel, channel->response_code);
return;
}
/* If the event was not yet handled, notify the application layer */
bnep_emit_ready_to_send(channel);
}
}

8
src/bnep.h
View File

@ -177,7 +177,7 @@ typedef struct {
linked_item_t item; // linked list - assert: first field
void *connection; // client connection
uint16_t service_uuid; // Service class: PANU, NAP, GN
uint16_t max_frame_size; // incomming max. frame size
uint16_t max_frame_size; // incomming max. frame size
// internal connection
btstack_packet_handler_t packet_handler;
@ -191,6 +191,12 @@ void bnep_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet,
/* Set up BNEP. */
void bnep_init(void);
/* Check if a data packet can be send out */
int bnep_can_send_packet_now(uint16_t bnep_cid);
/* Send a data packet */
int bnep_send(uint16_t bnep_cid, uint8_t *packet, uint16_t len);
/* Set security level required for incoming connections, need to be called before registering services */
void bnep_set_required_security_level(gap_security_level_t security_level);