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[sys/net/sixlowpan/sixlowedge.h sys/net/sixlowpan/sixlowedge.c]

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* Edge router functionalities implemented
This commit is contained in:
mlenders 2011-06-22 21:09:06 +02:00
parent 5e572fe6f7
commit b345138510
3 changed files with 185 additions and 1 deletions
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2
sys/net/sixlowpan/Jamfile
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@ -2,7 +2,7 @@ SubDir TOP sys net sixlowpan ;
# HDRS += $(TOP)/sys/net/sixlowpan/ ;
Module 6lowpan : sixlowpan.c sixlowip.c sixlowmac.c sixlownd.c ieee802154_frame.c serialnumber.c ;
Module 6lowpan : sixlowpan.c sixlowip.c sixlowmac.c sixlownd.c sixlowedge.c ieee802154_frame.c serialnumber.c ;
UseModule vtimer ;
UseModule transceiver ;

136
sys/net/sixlowpan/sixlowedge.c Normal file
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@ -0,0 +1,136 @@
#include <stdint.h>
#include <stdlib.h>
#include "ieee802154_frame.h"
#include "sixlowedge.h"
#include "sixlowip.h"
#include "serialnumber.h"
#include "sixlowerror.h"
abr_cache_t *abr_info;
uint16_t abro_version;
uint16_t get_next_abro_version();
void init_edge_router_info(ipv6_addr_t *abr_addr);
uint8_t abr_info_add_context(lowpan_context_t *context);
uint8_t abr_info_add_prefix(plist_t *prefix);
uint16_t get_next_abro_version() {
abro_version = serial_add16(abro_version, 1);
return abro_version;
}
uint8_t edge_initialize(transceiver_type_t trans,ipv6_addr_t *edge_router_addr) {
/* only allow addresses generated accoding to
* RFC 4944 (Section 6) & RFC 2464 (Section 4) from short address
* -- for now
*/
if ( edge_router_addr->uint16[4] != HTONS(IEEE_802154_PAN_ID ^ 0x0200) ||
edge_router_addr->uint16[5] != HTONS(0x00FF) ||
edge_router_addr->uint16[6] != HTONS(0xFE00)
) {
return SIXLOWERROR_ADDRESS;
}
// radio-address is 8-bit so this must be tested extra
if (edge_router_addr->uint8[14] != 0) {
return SIXLOWERROR_ADDRESS;
}
sixlowpan_init(trans,edge_router_addr->uint8[15]);
init_edge_router_info(edge_router_addr);
ipv6_init_iface_as_router();
return SUCCESS;
}
lowpan_context_t *edge_define_context(uint8_t cid, ipv6_addr_t *prefix, uint8_t prefix_len, uint16_t lifetime) {
lowpan_context_t *context;
context = lowpan_context_update(cid, prefix, prefix_len, OPT_6CO_FLAG_C_VALUE_SET, lifetime);
abr_info_add_context(context);
return context;
}
lowpan_context_t *edge_alloc_context(ipv6_addr_t *prefix, uint8_t prefix_len, uint16_t lifetime) {
lowpan_context_t *context = lowpan_context_lookup(prefix);
if (context != NULL && context->length == prefix_len) {
context = edge_define_context(context->num, prefix, prefix_len, lifetime);
}
context = NULL;
for (int i = 0; i < LOWPAN_CONTEXT_MAX; i++) {
if (lowpan_context_num_lookup(i) != NULL) {
context = edge_define_context(i, prefix, prefix_len, lifetime);
}
}
return context;
}
uint8_t abr_info_add_context(lowpan_context_t *context) {
if (context == NULL) return SIXLOWERROR_NULLPTR;
uint16_t abro_version = get_next_abro_version();
int i;
for (i = 0; i < abr_info->contexts_num; i++) {
if (abr_info->contexts[i]->num == context->num) {
abr_info->contexts[i] = context;
abr_info->version = abro_version;
return SUCCESS;
}
}
if (abr_info->contexts_num == LOWPAN_CONTEXT_MAX) {
return SIXLOWERROR_ARRAYFULL;
}
abr_info->contexts[abr_info->contexts_num++] = context;
abr_info->version = abro_version;
return SUCCESS;
}
uint8_t abr_info_add_prefix(plist_t *prefix) {
if (prefix == NULL) return SIXLOWERROR_NULLPTR;
if (abr_info->prefixes_num == OPT_PI_LIST_LEN) {
return SIXLOWERROR_ARRAYFULL;
}
uint16_t abro_version = get_next_abro_version();
abr_info->prefixes[abr_info->prefixes_num++] = prefix;
abr_info->version = abro_version;
return SUCCESS;
}
void init_edge_router_info(ipv6_addr_t *abr_addr) {
uint16_t abro_version = get_next_abro_version();
ipv6_addr_t prefix;
plist_t *prefix_info;
lowpan_context_t *context;
if (abr_info == NULL)
abr_info = abr_update_cache(abro_version,abr_addr,NULL,0,NULL,0);
else
abr_info = abr_update_cache(
abro_version,
abr_addr,
abr_info->contexts,
abr_info->contexts_num,
abr_info->prefixes,
abr_info->prefixes_num
);
ipv6_iface_add_addr(abr_addr,ADDR_STATE_PREFERRED,0,0,ADDR_TYPE_UNICAST);
ipv6_set_prefix(abr_addr, &prefix);
prefix_info = plist_add(&prefix, 64, OPT_PI_VLIFETIME_INFINITE,0,1,OPT_PI_FLAG_A);
abr_info_add_prefix(prefix_info);
context = edge_define_context(0, &prefix, 64, 5); // has to be reset some time later
abr_info_add_context(context);
}
abr_cache_t *get_edge_router_info() {
return abr_info;
}

48
sys/net/sixlowpan/sixlowedge.h Normal file
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@ -0,0 +1,48 @@
/* 6LoWPAN Edge Router header file */
#ifndef SIXLOWEDGE_H
#define SIXLOWEDGE_H
#include <stdint.h>
#include "sixlowip.h"
#include "sixlowpan.h"
#include "sixlownd.h"
/* constants for conjestion control [rfc2581 section 1] */
#define EDGE_CC_SMSS 1500
#define EDGE_CC_RMSS 1500
#define EDGE_CC_IW 3000 // 2*SMSS
#define EDGE_CC_LW 1500 // 1*SMSS
/* packet types of tty-packets */
#define EDGE_PACKET_TYPE_CONF 0
#define EDGE_PACKET_TYPE_L3 3
/* ethertypes for L3 packets */
#define EDGE_ETHERTYPE_IPV6 0x86DD
extern uint16_t abro_version;
typedef struct edge_packet_t {
uint8_t type;
uint8_t seq_num;
} edge_packet_t;
typedef struct edge_l3_header_t {
uint8_t type;
uint8_t seq_num;
uint16_t ethertype;
} edge_l3_header_t;
uint8_t edge_initialize(transceiver_type_t trans,ipv6_addr_t *edge_router_addr);
void edge_send_ipv6_over_tty(uint8_t *packet);
void edge_process_tty(void);
void edge_send_ipv6_over_lowpan(uint8_t *packet);
void edge_process_lowpan(void);
abr_cache_t *get_edge_router_info();
lowpan_context_t *edge_define_context(uint8_t cid, ipv6_addr_t *prefix, uint8_t prefix_len, uint16_t lifetime);
lowpan_context_t *edge_alloc_context(ipv6_addr_t *prefix, uint8_t prefix_len, uint16_t lifetime);
#endif /* SIXLOWEDGE_H*/