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Answer requests for single announcements

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This commit is contained in:
Matthias Schiffer 2012-10-08 02:45:07 +02:00
parent 46a05f9664
commit 26f5dc2ab0
4 changed files with 109 additions and 46 deletions
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25
ffd/announce.c
View file

@ -138,3 +138,28 @@ ffd_announce_t* ffd_announce_new(void) {
return a;
}
ffd_announce_t* ffd_announce_find(const ffd_node_id_t *node, uint16_t type, uint16_t key) {
ffd_announce_t *announce;
for (announce = announce_list; announce; announce = announce->next) {
if (ffd_are_node_ids_equal(&announce->node, node)
&& announce->type == type
&& announce->key == key)
return announce;
}
return NULL;
}
ffd_announce_t* ffd_announce_get(const ffd_node_id_t *node, uint16_t type, uint16_t key) {
ffd_announce_t *announce = ffd_announce_find(node, type, key);
if (!announce) {
announce = ffd_announce_new();
announce->node = *node;
announce->type = type;
announce->key = key;
}
return announce;
}

36
ffd/ffd.c
View file

@ -198,7 +198,7 @@ static void handle_tlv_ack_req(const ffd_tlv_ack_req_t *tlv_req, size_t len, han
ffd_neigh_t *neigh = get_tlv_neigh(arg);
ffd_send_ack(arg->iface, neigh, ntohs(tlv_req->nonce));
ffd_send_ack(neigh, ntohs(tlv_req->nonce));
}
static void handle_tlv_hello(const ffd_tlv_hello_t *tlv_hello, size_t len, handle_tlv_arg_t *arg) {
@ -284,24 +284,6 @@ static void handle_tlv_node_id(const ffd_tlv_node_id_t *tlv_node_id, size_t len,
arg->node_id = tlv_node_id->id;
}
static ffd_announce_t* get_announce(const ffd_node_id_t *node, uint16_t type, uint16_t key) {
ffd_announce_t *announce;
for (announce = announce_list; announce; announce = announce->next) {
if (ffd_are_node_ids_equal(&announce->node, node)
&& announce->type == type
&& announce->key == key)
return announce;
}
/* not found */
announce = ffd_announce_new();
announce->node = *node;
announce->type = type;
announce->key = key;
return announce;
}
static ffd_nexthop_t* find_nexthop(const ffd_announce_t *announce, ffd_neigh_t *neigh) {
ffd_nexthop_t *nexthop;
for (nexthop = announce->nexthop_list; nexthop; nexthop = nexthop->next) {
@ -342,7 +324,7 @@ static void handle_tlv_update(const ffd_tlv_update_t *tlv_update, size_t len, ha
fprintf(stderr, "debug: update received from %04x%04x.\n", ntohl(*(uint32_t*)arg->node_id.id), ntohl(*(uint32_t*)(arg->node_id.id+4)));
ffd_announce_t *announce = get_announce(&arg->node_id, ntohs(tlv_update->type), ntohs(tlv_update->key));
ffd_announce_t *announce = ffd_announce_get(&arg->node_id, ntohs(tlv_update->type), ntohs(tlv_update->key));
ffd_metric_seqno_t ms = { ntohs(tlv_update->metric), ntohs(tlv_update->seqno) };
bool feasible = ffd_is_feasible(announce, ms);
@ -387,13 +369,17 @@ static void handle_tlv_announce_req(const ffd_tlv_announce_req_t *tlv_req, size_
return;
}
ffd_announce_t *announce = NULL;
if (!ffd_is_node_id_unspec(&tlv_req->node)) {
announce = NULL;
if (ffd_is_node_id_unspec(&tlv_req->node)) {
ffd_send_update(NULL, get_tlv_neigh(arg), NULL, tlv_req->flags & FFD_UPDATE_WITH_DATA);
}
else {
ffd_announce_t *announce = ffd_announce_find(&tlv_req->node, ntohs(tlv_req->type), ntohs(tlv_req->key));
ffd_send_update(arg->iface, get_tlv_neigh(arg), announce, tlv_req->flags & FFD_UPDATE_WITH_DATA);
if (announce)
ffd_send_update(NULL, get_tlv_neigh(arg), announce, tlv_req->flags & FFD_UPDATE_WITH_DATA);
else
ffd_send_retract(get_tlv_neigh(arg), tlv_req->node, ntohs(tlv_req->type), ntohs(tlv_req->key));
}
}
static void handle_tlv(ffd_tlv_type_t type, const void *data, size_t len, void *arg) {

5
ffd/ffd.h
View file

@ -186,10 +186,13 @@ static inline bool ffd_is_feasible(const ffd_announce_t *announce, ffd_metric_se
void ffd_announce_update(ffd_announce_t *announce);
void ffd_announce_update_nexthop(ffd_announce_t *announce, ffd_nexthop_t *nexthop, ffd_metric_seqno_t ms, uint16_t interval);
ffd_announce_t* ffd_announce_new(void);
ffd_announce_t* ffd_announce_find(const ffd_node_id_t *node, uint16_t type, uint16_t key);
ffd_announce_t* ffd_announce_get(const ffd_node_id_t *node, uint16_t type, uint16_t key);
void ffd_send_ack(ffd_iface_t *iface, ffd_neigh_t *neigh, uint16_t nonce);
void ffd_send_ack(ffd_neigh_t *neigh, uint16_t nonce);
void ffd_send_hellos(void);
void ffd_send_update(ffd_iface_t *iface, ffd_neigh_t *neigh, ffd_announce_t *announce, bool with_data);
void ffd_send_retract(ffd_neigh_t *neigh, ffd_node_id_t node, uint16_t type, uint16_t key);
void ffd_send_announce_request(ffd_iface_t *iface, ffd_neigh_t *neigh, ffd_node_id_t node, uint16_t type, uint16_t key, bool with_data);
#endif /* _FFD_FFD_H_ */

87
ffd/send.c
View file

@ -40,7 +40,7 @@
#include <sys/uio.h>
static bool send_eth(const eth_addr_t *addr, unsigned ifindex, void *buf, size_t len) {
static bool send_eth(const eth_addr_t *addr, unsigned ifindex, const void *buf, size_t len) {
static const uint8_t zeros[46] = {0};
struct sockaddr_ll sa;
@ -52,7 +52,7 @@ static bool send_eth(const eth_addr_t *addr, unsigned ifindex, void *buf, size_t
memcpy(sa.sll_addr, addr->d, ETH_ALEN);
struct iovec vec[2] = {
{ .iov_base = buf, .iov_len = len },
{ .iov_base = (void*)buf, .iov_len = len },
{ .iov_base = (void*)zeros, .iov_len = sizeof(zeros) - len },
};
@ -72,7 +72,43 @@ static bool send_eth(const eth_addr_t *addr, unsigned ifindex, void *buf, size_t
return true;
}
void ffd_send_ack(ffd_iface_t *iface, ffd_neigh_t *neigh, uint16_t nonce) {
static inline bool send_neigh(const ffd_neigh_t *neigh, const ffd_packet_t *packet) {
if (!neigh->iface)
return false;
if (!send_eth(&neigh->addr, neigh->iface->ifindex, packet, sizeof(ffd_packet_t)+ntohs(packet->len))) {
fprintf(stderr, "send_eth: %m\n");
return false;
}
return true;
}
static inline bool send_iface(const ffd_iface_t *iface, const ffd_packet_t *packet) {
if (!send_eth(&ffd_addr, iface->ifindex, packet, sizeof(ffd_packet_t)+ntohs(packet->len))) {
fprintf(stderr, "send_eth: %m\n");
return false;
}
return true;
}
static inline void send_broadcast(const ffd_packet_t *packet) {
ffd_iface_t *iface;
for (iface = iface_list; iface; iface = iface->next)
send_iface(iface, packet);
}
static inline void send_any(const ffd_iface_t *iface, const ffd_neigh_t *neigh, const ffd_packet_t *packet) {
if (neigh)
send_neigh(neigh, packet);
else if(iface)
send_iface(iface, packet);
else
send_broadcast(packet);
}
void ffd_send_ack(ffd_neigh_t *neigh, uint16_t nonce) {
ffd_packet_t *packet = alloca(sizeof(ffd_packet_t)+FFD_PACKET_MAX);
packet->version_magic = htons(FFD_VERSION_MAGIC);
@ -84,8 +120,7 @@ void ffd_send_ack(ffd_iface_t *iface, ffd_neigh_t *neigh, uint16_t nonce) {
ack->nonce = htons(nonce);
if (!send_eth(&neigh->addr, iface->ifindex, packet, sizeof(ffd_packet_t)+ntohs(packet->len)))
fprintf(stderr, "send_eth: %m\n");
send_neigh(neigh, packet);
}
static void add_ihus(ffd_packet_t *packet, size_t max_len, const ffd_iface_t *iface) {
@ -127,8 +162,7 @@ void ffd_send_hellos(void) {
add_ihus(packet, FFD_PACKET_MAX, iface);
if (!send_eth(&ffd_addr, iface->ifindex, packet, sizeof(ffd_packet_t)+ntohs(packet->len)))
fprintf(stderr, "send_eth: %m\n");
send_iface(iface, packet);
}
}
@ -192,11 +226,6 @@ void ffd_send_update(ffd_iface_t *iface, ffd_neigh_t *neigh, ffd_announce_t *ann
packet->version_magic = htons(FFD_VERSION_MAGIC);
packet->len = 0;
const eth_addr_t *addr = &ffd_addr;
if (neigh)
addr = &neigh->addr;
if (announce) {
add_update(packet, FFD_PACKET_MAX, NULL, announce, with_data);
}
@ -206,8 +235,7 @@ void ffd_send_update(ffd_iface_t *iface, ffd_neigh_t *neigh, ffd_announce_t *ann
ffd_announce_t *a;
for (a = announce_list; a; a = a->next) {
if (!add_update(packet, FFD_PACKET_MAX, &node_id, a, with_data)) {
if (!send_eth(addr, iface->ifindex, packet, sizeof(ffd_packet_t)+ntohs(packet->len)))
fprintf(stderr, "send_eth: %m\n");
send_any(iface, neigh, packet);
node_id = FFD_NODE_ID_UNSPEC;
packet->len = 0;
@ -220,10 +248,32 @@ void ffd_send_update(ffd_iface_t *iface, ffd_neigh_t *neigh, ffd_announce_t *ann
}
}
if (packet->len) {
if (!send_eth(addr, iface->ifindex, packet, sizeof(ffd_packet_t)+ntohs(packet->len)))
fprintf(stderr, "send_eth: %m\n");
if (packet->len)
send_any(iface, neigh, packet);
}
void ffd_send_retract(ffd_neigh_t *neigh, ffd_node_id_t node, uint16_t type, uint16_t key) {
ffd_packet_t *packet = alloca(sizeof(ffd_packet_t)+FFD_PACKET_MAX);
packet->version_magic = htons(FFD_VERSION_MAGIC);
packet->len = 0;
if (!add_node_id(packet, FFD_PACKET_MAX, node))
return;
ffd_tlv_update_t *req = ffd_tlv_add(packet, FFD_PACKET_MAX, TLV_UPDATE, sizeof(ffd_tlv_update_t));
if (!req)
return;
req->flags = 0;
req->reserved = 0;
req->interval = htons(FFD_UPDATE_INTERVAL);
req->seqno = 0;
req->metric = 0xffff; /* no need to htons */
req->type = htons(type);
req->key = htons(key);
send_neigh(neigh, packet);
}
void ffd_send_announce_request(ffd_iface_t *iface, ffd_neigh_t *neigh, ffd_node_id_t node, uint16_t type, uint16_t key, bool with_data) {
@ -245,6 +295,5 @@ void ffd_send_announce_request(ffd_iface_t *iface, ffd_neigh_t *neigh, ffd_node_
if (with_data)
req->flags |= FFD_UPDATE_WITH_DATA;
if (!send_eth(&ffd_addr, iface->ifindex, packet, sizeof(ffd_packet_t)+ntohs(packet->len)))
fprintf(stderr, "send_eth: %m\n");
send_any(iface, neigh, packet);
}