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Add cost computation

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This commit is contained in:
Matthias Schiffer 2012-09-29 21:55:38 +02:00
parent 1a8f3c7cef
commit ae4505db19
1 changed files with 16 additions and 3 deletions
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19
ffd/ffd.c
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@ -47,7 +47,7 @@
static const eth_addr_t ffd_addr = {{0x03, 0x00, 0x00, 0x00, 0x0f, 0xfd}}; static const eth_addr_t ffd_addr = {{0x03, 0x00, 0x00, 0x00, 0x0f, 0xfd}};
#define HELLO_INTERVAL 1000 #define HELLO_INTERVAL 400
#define IHU_INTERVAL (3*HELLO_INTERVAL) #define IHU_INTERVAL (3*HELLO_INTERVAL)
#define PACKET_MAX 1000 #define PACKET_MAX 1000
@ -199,6 +199,19 @@ static uint16_t get_neigh_rxcost(const ffd_neigh_t *neigh) {
return (0x1000/received); return (0x1000/received);
} }
static uint16_t get_neigh_cost(const ffd_neigh_t *neigh) {
uint16_t txcost = neigh->txcost;
if (txcost < 256)
txcost = 256;
uint32_t cost = (txcost * get_neigh_rxcost(neigh)) >> 8;
if (cost > 0xffff)
return 0xffff;
else
return cost;
}
static void update_netifs() { static void update_netifs() {
ffd_iface_t *iface, **cur; ffd_iface_t *iface, **cur;
@ -339,7 +352,7 @@ static void handle_tlv_hello(const ffd_tlv_hello_t *tlv_hello, size_t len, const
neigh->last_seqno = seqno; neigh->last_seqno = seqno;
neigh->last_hello = now; neigh->last_hello = now;
fprintf(stderr, "debug: accepted hello, log %04x, rxcost is %u now.\n", neigh->hello_log, get_neigh_rxcost(neigh)); fprintf(stderr, "debug: accepted hello, log %04x, rxcost is %u, cost is %u now.\n", neigh->hello_log, get_neigh_rxcost(neigh), get_neigh_cost(neigh));
} }
static void handle_tlv_ihu(const ffd_tlv_ihu_t *tlv_ihu, size_t len, const eth_addr_t *addr, ffd_iface_t *iface) { static void handle_tlv_ihu(const ffd_tlv_ihu_t *tlv_ihu, size_t len, const eth_addr_t *addr, ffd_iface_t *iface) {
@ -365,7 +378,7 @@ static void handle_tlv_ihu(const ffd_tlv_ihu_t *tlv_ihu, size_t len, const eth_a
neigh->last_ihu = now; neigh->last_ihu = now;
neigh->txcost = ntohs(tlv_ihu->rxcost); neigh->txcost = ntohs(tlv_ihu->rxcost);
fprintf(stderr, "debug: accepted IHU, txcost is %u now.\n", neigh->txcost); fprintf(stderr, "debug: accepted IHU, txcost is %u, cost is %u now.\n", neigh->txcost, get_neigh_cost(neigh));
} }
static void handle_tlv(ffd_tlv_type_t type, const void *data, size_t len, void *arg) { static void handle_tlv(ffd_tlv_type_t type, const void *data, size_t len, void *arg) {