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Babel: Simplify auth expiration

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Just use hello_expiry for that, keep init_expiry for initial
unauthentized neighbors.
This commit is contained in:
Ondrej Zajicek (work) 2021-06-09 19:31:55 +02:00
parent 8eea396baf
commit 6d26f85395
2 changed files with 11 additions and 25 deletions
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32
proto/babel/babel.c
View file

@ -57,7 +57,6 @@ static void babel_send_seqno_request(struct babel_proto *p, struct babel_entry *
static void babel_update_cost(struct babel_neighbor *n);
static inline void babel_kick_timer(struct babel_proto *p);
static inline void babel_iface_kick_timer(struct babel_iface *ifa);
static void babel_auth_init_neighbor(struct babel_neighbor *n);
/*
* Functions to maintain data structures
@ -428,10 +427,10 @@ babel_get_neighbor(struct babel_iface *ifa, ip_addr addr)
nbr->rxcost = BABEL_INFINITY;
nbr->txcost = BABEL_INFINITY;
nbr->cost = BABEL_INFINITY;
nbr->init_expiry = current_time() + BABEL_INITIAL_NEIGHBOR_TIMEOUT;
init_list(&nbr->routes);
init_list(&nbr->requests);
add_tail(&ifa->neigh_list, NODE nbr);
babel_auth_init_neighbor(nbr);
return nbr;
}
@ -511,11 +510,11 @@ babel_expire_neighbors(struct babel_proto *p)
if (nbr->ihu_expiry && nbr->ihu_expiry <= now_)
babel_expire_ihu(p, nbr);
if (nbr->hello_expiry && nbr->hello_expiry <= now_)
babel_expire_hello(p, nbr, now_);
if (nbr->init_expiry && nbr->init_expiry <= now_)
{ babel_flush_neighbor(p, nbr); continue; }
if (nbr->auth_expiry && nbr->auth_expiry <= now_)
babel_flush_neighbor(p, nbr);
if (nbr->hello_expiry && nbr->hello_expiry <= now_)
{ babel_expire_hello(p, nbr, now_); continue; }
}
}
}
@ -1115,6 +1114,9 @@ babel_update_hello_history(struct babel_neighbor *n, u16 seqno, uint interval)
/* Update expiration */
n->hello_expiry = current_time() + BABEL_HELLO_EXPIRY_FACTOR(interval);
n->last_hello_int = interval;
/* Disable initial timeout */
n->init_expiry = 0;
}
@ -1413,20 +1415,6 @@ babel_auth_reset_index(struct babel_iface *ifa)
ifa->auth_pc = 1;
}
/**
* babel_auth_init_neighbor - Initialise authentication data for neighbor
* @n: Neighbor to initialise
*
* This function initialises the authentication-related state for a new neighbor
* that has just been created.
*/
void
babel_auth_init_neighbor(struct babel_neighbor *n)
{
if (n->ifa->cf->auth_type != BABEL_AUTH_NONE)
n->auth_expiry = current_time() + BABEL_AUTH_NEIGHBOR_TIMEOUT;
}
static void
babel_auth_send_challenge_request(struct babel_iface *ifa, struct babel_neighbor *n)
{
@ -1499,7 +1487,6 @@ babel_auth_check_pc(struct babel_iface *ifa, struct babel_msg_auth *msg)
memcpy(n->auth_index, msg->index, msg->index_len);
n->auth_pc = msg->pc;
n->auth_expiry = current_time() + BABEL_AUTH_NEIGHBOR_TIMEOUT;
n->auth_passed = 1;
return 1;
@ -1528,7 +1515,6 @@ babel_auth_check_pc(struct babel_iface *ifa, struct babel_msg_auth *msg)
}
n->auth_pc = msg->pc;
n->auth_expiry = current_time() + BABEL_AUTH_NEIGHBOR_TIMEOUT;
n->auth_passed = 1;
return 1;
@ -2116,7 +2102,7 @@ babel_show_neighbors(struct proto *P, const char *iff)
rts++;
uint hellos = u32_popcount(n->hello_map);
btime timer = (n->hello_expiry ?: n->auth_expiry) - current_time();
btime timer = (n->hello_expiry ?: n->init_expiry) - current_time();
cli_msg(-1024, "%-25I %-10s %6u %6u %6u %7t %-4s",
n->addr, ifa->iface->name, n->cost, rts, hellos, MAX(timer, 0),
n->auth_passed ? "Yes" : "No");

4
proto/babel/babel.h
View file

@ -52,6 +52,7 @@
#define BABEL_RXCOST_WIRELESS 256
#define BABEL_INITIAL_HOP_COUNT 255
#define BABEL_MAX_SEND_INTERVAL 5 /* Unused ? */
#define BABEL_INITIAL_NEIGHBOR_TIMEOUT (60 S_)
/* Max interval that will not overflow when carried as 16-bit centiseconds */
#define BABEL_TIME_UNITS 10000 /* On-wire times are counted in centiseconds */
@ -67,7 +68,6 @@
#define BABEL_AUTH_NONCE_LEN 10 /* we send 80 bit nonces */
#define BABEL_AUTH_MAX_NONCE_LEN 192 /* max allowed by spec */
#define BABEL_AUTH_INDEX_LEN 32 /* max size in spec */
#define BABEL_AUTH_NEIGHBOR_TIMEOUT (300 S_)
#define BABEL_AUTH_CHALLENGE_TIMEOUT (30 S_)
#define BABEL_AUTH_CHALLENGE_INTERVAL (300 MS_) /* used for both challenges and replies */
@ -236,7 +236,7 @@ struct babel_neighbor {
/* expiry timers */
btime hello_expiry;
btime ihu_expiry;
btime auth_expiry;
btime init_expiry;
list routes; /* Routes this neighbour has sent us (struct babel_route) */
list requests; /* Seqno requests bound to this neighbor */