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authordimitri staessens <dimitri.staessens@ugent.be>2017-09-23 10:33:54 +0200
committerdimitri staessens <dimitri.staessens@ugent.be>2017-09-23 10:33:54 +0200
commit17ab2b6d6bc95337d5fd54e058c0822260dbacf1 (patch)
treeba23c49b6b7c19394bdfcd65f9e088c878f3d374 /src
parent30b6998337635a37db93680760637dae759c951d (diff)
downloadouroboros-17ab2b6d6bc95337d5fd54e058c0822260dbacf1.tar.gz
ouroboros-17ab2b6d6bc95337d5fd54e058c0822260dbacf1.zip
ipcpd: Lock dht before reading parameters
Diffstat (limited to 'src')
-rw-r--r--src/ipcpd/normal/dht.c21
1 files changed, 14 insertions, 7 deletions
diff --git a/src/ipcpd/normal/dht.c b/src/ipcpd/normal/dht.c
index af1686a9..2e6f60ab 100644
--- a/src/ipcpd/normal/dht.c
+++ b/src/ipcpd/normal/dht.c
@@ -1961,7 +1961,7 @@ static int kad_handle_join_resp(struct dht * dht,
return -1;
}
- pthread_rwlock_wrlock(&dht->lock);
+ pthread_rwlock_rdlock(&dht->lock);
dht->buckets = bucket_create();
if (dht->buckets == NULL) {
@@ -1992,8 +1992,6 @@ static int kad_handle_join_resp(struct dht * dht,
kad_req_respond(req);
- dht_update_bucket(dht, msg->s_id.data, msg->s_addr);
-
pthread_rwlock_unlock(&dht->lock);
log_dbg("Enrollment of DHT completed.");
@@ -2223,6 +2221,8 @@ static void * dht_handle_sdu(void * o)
uint64_t addr;
buffer_t buf;
size_t i;
+ size_t b;
+ size_t t_expire;
assert(o);
@@ -2247,13 +2247,20 @@ static void * dht_handle_sdu(void * o)
return (void *) -1;
}
- if (msg->has_key && msg->key.len != dht->b) {
+ pthread_rwlock_rdlock(&dht->lock);
+
+ b = dht->b;
+ t_expire = dht->t_expire;
+
+ pthread_rwlock_unlock(&dht->lock);
+
+ if (msg->has_key && msg->key.len != b) {
kad_msg__free_unpacked(msg, NULL);
log_warn("Bad key in message.");
return (void *) -1;
}
- if (msg->has_s_id && !msg->has_b && msg->s_id.len != dht->b) {
+ if (msg->has_s_id && !msg->has_b && msg->s_id.len != b) {
kad_msg__free_unpacked(msg, NULL);
log_warn("Bad source ID in message of type %d.", msg->code);
return (void *) -1;
@@ -2299,9 +2306,9 @@ static void * dht_handle_sdu(void * o)
resp_msg.has_t_refresh = true;
resp_msg.has_t_replicate = true;
resp_msg.alpha = KAD_ALPHA;
- resp_msg.b = dht->b;
+ resp_msg.b = b;
resp_msg.k = KAD_K;
- resp_msg.t_expire = dht->t_expire;
+ resp_msg.t_expire = t_expire;
resp_msg.t_refresh = KAD_T_REFR;
resp_msg.t_replicate = KAD_T_REPL;
break;