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authordimitri staessens <dimitri.staessens@intec.ugent.be>2016-10-31 18:35:17 +0100
committerdimitri staessens <dimitri.staessens@intec.ugent.be>2016-10-31 18:43:04 +0100
commit86b6d0ca1b871e629a95c9cf0ddceeeb7e1bd345 (patch)
tree02f048b2b148ad9426194967cbc332a93742ac52 /src/ipcpd/shim-eth-llc/main.c
parentadd7d5f1e59c661b431ba86ba80d62badc14e762 (diff)
downloadouroboros-86b6d0ca1b871e629a95c9cf0ddceeeb7e1bd345.tar.gz
ouroboros-86b6d0ca1b871e629a95c9cf0ddceeeb7e1bd345.zip
lib, ipcpd: Improve flow allocation
All calls for opening rbuffs are now concentrated on the dev side. This allows some simplifications in the np1 calls. The ipcp_fini call will not destroy the mutex associated with the state, since the final state needs to be checked before shutting down an IPCP.
Diffstat (limited to 'src/ipcpd/shim-eth-llc/main.c')
-rw-r--r--src/ipcpd/shim-eth-llc/main.c30
1 files changed, 21 insertions, 9 deletions
diff --git a/src/ipcpd/shim-eth-llc/main.c b/src/ipcpd/shim-eth-llc/main.c
index 0d4c3903..3f3c0e1e 100644
--- a/src/ipcpd/shim-eth-llc/main.c
+++ b/src/ipcpd/shim-eth-llc/main.c
@@ -624,18 +624,22 @@ static void * eth_llc_ipcp_sdu_writer(void * o)
(void) o;
- while (true) {
- if (flow_event_wait(eth_llc_data.np1_flows,
- eth_llc_data.fq,
- &timeout) == -ETIMEDOUT)
- continue;
+ while (flow_event_wait(eth_llc_data.np1_flows,
+ eth_llc_data.fq,
+ &timeout)) {
+ pthread_rwlock_rdlock(&ipcpi.state_lock);
+
+ if (ipcp_get_state() != IPCP_ENROLLED) {
+ pthread_rwlock_unlock(&ipcpi.state_lock);
+ return (void *) -1; /* -ENOTENROLLED */
+ }
while ((fd = fqueue_next(eth_llc_data.fq)) >= 0) {
if (ipcp_flow_read(fd, &sdb)) {
LOG_ERR("Bad read from fd %d.", fd);
continue;
}
- pthread_rwlock_rdlock(&ipcpi.state_lock);
+
pthread_rwlock_rdlock(&eth_llc_data.flows_lock);
ssap = reverse_bits(eth_llc_data.fd_to_ef[fd].sap);
@@ -645,7 +649,6 @@ static void * eth_llc_ipcp_sdu_writer(void * o)
MAC_SIZE);
pthread_rwlock_unlock(&eth_llc_data.flows_lock);
- pthread_rwlock_unlock(&ipcpi.state_lock);
eth_llc_ipcp_send_frame(r_addr, dsap, ssap,
shm_du_buff_head(sdb),
@@ -653,6 +656,8 @@ static void * eth_llc_ipcp_sdu_writer(void * o)
- shm_du_buff_head(sdb));
ipcp_flow_del(sdb);
}
+
+ pthread_rwlock_unlock(&ipcpi.state_lock);
}
return (void *) 1;
@@ -1045,6 +1050,13 @@ static int eth_llc_ipcp_flow_dealloc(int fd)
ipcp_flow_fini(fd);
pthread_rwlock_rdlock(&ipcpi.state_lock);
+
+ if (ipcp_get_state() != IPCP_ENROLLED) {
+ pthread_rwlock_unlock(&ipcpi.state_lock);
+ LOG_DBG("Won't register with non-enrolled IPCP.");
+ return -1; /* -ENOTENROLLED */
+ }
+
pthread_rwlock_wrlock(&eth_llc_data.flows_lock);
flow_set_del(eth_llc_data.np1_flows, fd);
@@ -1058,11 +1070,11 @@ static int eth_llc_ipcp_flow_dealloc(int fd)
eth_llc_data.ef_to_fd[sap] = -1;
+ flow_dealloc(fd);
+
pthread_rwlock_unlock(&eth_llc_data.flows_lock);
pthread_rwlock_unlock(&ipcpi.state_lock);
- flow_dealloc(fd);
-
LOG_DBG("Flow with fd %d deallocated.", fd);
return 0;