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Fix control & data keep alive message

This commit is contained in:
vemax78 2013-05-29 22:35:11 +02:00
parent b99a52ee9d
commit 96eda13334
3 changed files with 16 additions and 18 deletions
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9
src/common/capwap_element.c
View File

@ -148,7 +148,7 @@ int capwap_parsing_packet(struct capwap_packet_rxmng* rxmngpacket, struct capwap
memcpy(&rxmngpacket->readpos, &rxmngpacket->readbodypos, sizeof(struct read_block_from_pos));
if (rxmngpacket->isctrlpacket) {
unsigned short bodylength = rxmngpacket->ctrlmsg.length;
unsigned short bodylength = rxmngpacket->ctrlmsg.length - CAPWAP_CONTROL_MESSAGE_MIN_LENGTH;
while (bodylength > 0) {
uint16_t type;
uint16_t msglength;
@ -435,12 +435,7 @@ int capwap_parsing_packet(struct capwap_packet_rxmng* rxmngpacket, struct capwap
uint16_t type;
uint16_t msglength;
struct capwap_message_elements_ops* read_ops;
unsigned short bodylength = rxmngpacket->datamsg.length;
if (!bodylength) {
/* TODO */
return 1;
}
unsigned short bodylength = rxmngpacket->datamsg.length - CAPWAP_DATA_MESSAGE_KEEPALIVE_MIN_LENGTH;
/* Get type and length */
rxmngpacket->readerpacketallowed = sizeof(struct capwap_message_element);

19
src/common/capwap_protocol.c
View File

@ -410,7 +410,7 @@ static int capwap_fragment_write_block_from_pos(struct capwap_packet_txmng* txmn
fragmentpacket->offset = available + packetpos;
if (txmngpacket->isctrlpacket) {
txmngpacket->ctrlmsg->length = htons(ntohs(txmngpacket->ctrlmsg->length) + (fragmentpacket->offset - oldoffset));
} else {
} else if (IS_FLAG_K_HEADER(txmngpacket->header)) {
txmngpacket->datamsg->length = htons(ntohs(txmngpacket->datamsg->length) + (fragmentpacket->offset - oldoffset));
}
}
@ -557,7 +557,7 @@ struct capwap_packet_txmng* capwap_packet_txmng_create_ctrl_message(struct capwa
txmngpacket->ctrlmsg = (struct capwap_control_message*)&fragmentpacket->buffer[fragmentpacket->offset];
txmngpacket->ctrlmsg->type = htonl(type);
txmngpacket->ctrlmsg->seq = seq;
txmngpacket->ctrlmsg->length = 0;
txmngpacket->ctrlmsg->length = htons(CAPWAP_CONTROL_MESSAGE_MIN_LENGTH); /* sizeof(Msg Element Length) + sizeof(Flags) */
txmngpacket->ctrlmsg->flags = 0;
/* Prepare for save capwap element */
@ -593,14 +593,13 @@ struct capwap_packet_txmng* capwap_packet_txmng_create_data_message(struct capwa
fragmentpacket = (struct capwap_fragment_packet_item*)txmngpacket->fragmentlist->last->item;
ASSERT((fragmentpacket->offset + sizeof(struct capwap_data_message)) < fragmentpacket->size);
/* Create message */
/* */
txmngpacket->isctrlpacket = 0;
txmngpacket->datamsg = (struct capwap_data_message*)&fragmentpacket->buffer[fragmentpacket->offset];
txmngpacket->datamsg->length = 0;
/* Prepare for save frame */
fragmentpacket->offset += sizeof(struct capwap_data_message);
if (IS_FLAG_K_HEADER(data)) {
txmngpacket->datamsg = (struct capwap_data_message*)&fragmentpacket->buffer[fragmentpacket->offset];
txmngpacket->datamsg->length = CAPWAP_DATA_MESSAGE_KEEPALIVE_MIN_LENGTH;
fragmentpacket->offset += sizeof(struct capwap_data_message);
}
return txmngpacket;
}
@ -834,7 +833,7 @@ static void capwap_packet_rxmng_complete(struct capwap_packet_rxmng* rxmngpacket
rxmngpacket->read_ops.read_u8((capwap_message_elements_handle)rxmngpacket, &rxmngpacket->ctrlmsg.seq);
rxmngpacket->read_ops.read_u16((capwap_message_elements_handle)rxmngpacket, &rxmngpacket->ctrlmsg.length);
rxmngpacket->read_ops.read_u8((capwap_message_elements_handle)rxmngpacket, &rxmngpacket->ctrlmsg.flags);
} else {
} else if (IS_FLAG_K_HEADER(rxmngpacket->header)) {
rxmngpacket->readerpacketallowed = sizeof(struct capwap_data_message);
rxmngpacket->read_ops.read_u16((capwap_message_elements_handle)rxmngpacket, &rxmngpacket->datamsg.length);
}

6
src/common/capwap_rfc.h
View File

@ -118,6 +118,8 @@ struct capwap_message_element {
#define CAPWAP_LAST_MESSAGE_TYPE 26
/* Control Message */
#define CAPWAP_CONTROL_MESSAGE_MIN_LENGTH 3
struct capwap_control_message {
uint32_t type;
uint8_t seq;
@ -126,7 +128,9 @@ struct capwap_control_message {
int8_t elements[0];
} STRUCT_PACKED;
/* Data Message */
/* Data Message Keep-Alive*/
#define CAPWAP_DATA_MESSAGE_KEEPALIVE_MIN_LENGTH 2
struct capwap_data_message {
uint16_t length;
int8_t elements[0];