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-rw-r--r--src/ipcpd/shim-eth-llc/main.c130
1 files changed, 101 insertions, 29 deletions
diff --git a/src/ipcpd/shim-eth-llc/main.c b/src/ipcpd/shim-eth-llc/main.c
index d9f2d49f..651429e6 100644
--- a/src/ipcpd/shim-eth-llc/main.c
+++ b/src/ipcpd/shim-eth-llc/main.c
@@ -117,11 +117,21 @@ struct {
pthread_t sdu_writer;
pthread_t sdu_reader;
+
+ /* Handle mgmt frames in a different thread */
+ pthread_t mgmt_frame_handler;
+ pthread_mutex_t mgmt_frame_lock;
+ pthread_cond_t mgmt_frame_cond;
+ uint8_t mgmt_frame_r_addr[MAC_SIZE];
+ uint8_t mgmt_frame_buf[ETH_FRAME_SIZE];
+ size_t mgmt_frame_len;
+ bool mgmt_frame_arrived;
} eth_llc_data;
static int eth_llc_data_init(void)
{
int i;
+ int ret = -1;
eth_llc_data.fd_to_ef = malloc(sizeof(struct ef) * IRMD_MAX_FLOWS);
if (eth_llc_data.fd_to_ef == NULL)
@@ -129,32 +139,26 @@ static int eth_llc_data_init(void)
eth_llc_data.ef_to_fd = malloc(sizeof(struct ef) * MAX_SAPS);
if (eth_llc_data.ef_to_fd == NULL) {
- free(eth_llc_data.fd_to_ef);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto free_fd_to_ef;
}
eth_llc_data.saps = bmp_create(MAX_SAPS, 2);
if (eth_llc_data.saps == NULL) {
- free(eth_llc_data.ef_to_fd);
- free(eth_llc_data.fd_to_ef);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto free_ef_to_fd;
}
eth_llc_data.np1_flows = flow_set_create();
if (eth_llc_data.np1_flows == NULL) {
- bmp_destroy(eth_llc_data.saps);
- free(eth_llc_data.ef_to_fd);
- free(eth_llc_data.fd_to_ef);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto bmp_destroy;
}
eth_llc_data.fq = fqueue_create();
if (eth_llc_data.fq == NULL) {
- flow_set_destroy(eth_llc_data.np1_flows);
- bmp_destroy(eth_llc_data.saps);
- free(eth_llc_data.ef_to_fd);
- free(eth_llc_data.fd_to_ef);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto flow_set_destroy;
}
for (i = 0; i < MAX_SAPS; ++i)
@@ -166,26 +170,57 @@ static int eth_llc_data_init(void)
memset(&eth_llc_data.fd_to_ef[i].r_addr, 0, MAC_SIZE);
}
- pthread_rwlock_init(&eth_llc_data.flows_lock, NULL);
+ if (pthread_rwlock_init(&eth_llc_data.flows_lock, NULL))
+ goto fqueue_destroy;
+
+ if (pthread_mutex_init(&eth_llc_data.mgmt_frame_lock, NULL))
+ goto flow_lock_destroy;
+
+ if (pthread_cond_init(&eth_llc_data.mgmt_frame_cond, NULL))
+ goto mgmt_frame_lock_destroy;
#if defined(PACKET_RX_RING) && defined(PACKET_TX_RING)
- pthread_mutex_init(&eth_llc_data.tx_lock, NULL);
+ if (pthread_mutex_init(&eth_llc_data.tx_lock, NULL))
+ goto mgmt_frame_cond_destroy;
#endif
return 0;
+
+#if defined(PACKET_RX_RING) && defined(PACKET_TX_RING)
+ mgmt_frame_cond_destroy:
+ pthread_cond_destroy(&eth_llc_data.mgmt_frame_cond);
+#endif
+ mgmt_frame_lock_destroy:
+ pthread_mutex_destroy(&eth_llc_data.mgmt_frame_lock);
+ flow_lock_destroy:
+ pthread_rwlock_destroy(&eth_llc_data.flows_lock);
+ fqueue_destroy:
+ fqueue_destroy(eth_llc_data.fq);
+ flow_set_destroy:
+ flow_set_destroy(eth_llc_data.np1_flows);
+ bmp_destroy:
+ bmp_destroy(eth_llc_data.saps);
+ free_ef_to_fd:
+ free(eth_llc_data.ef_to_fd);
+ free_fd_to_ef:
+ free(eth_llc_data.fd_to_ef);
+
+ return ret;
}
void eth_llc_data_fini(void)
{
- bmp_destroy(eth_llc_data.saps);
- flow_set_destroy(eth_llc_data.np1_flows);
- fqueue_destroy(eth_llc_data.fq);
- free(eth_llc_data.fd_to_ef);
- free(eth_llc_data.ef_to_fd);
- pthread_rwlock_destroy(&eth_llc_data.flows_lock);
#if defined(PACKET_RX_RING) && defined(PACKET_TX_RING)
pthread_mutex_destroy(&eth_llc_data.tx_lock);
#endif
+ pthread_cond_destroy(&eth_llc_data.mgmt_frame_cond);
+ pthread_mutex_destroy(&eth_llc_data.mgmt_frame_lock);
+ pthread_rwlock_destroy(&eth_llc_data.flows_lock);
+ fqueue_destroy(eth_llc_data.fq);
+ flow_set_destroy(eth_llc_data.np1_flows);
+ bmp_destroy(eth_llc_data.saps);
+ free(eth_llc_data.fd_to_ef);
+ free(eth_llc_data.ef_to_fd);
}
static uint8_t reverse_bits(uint8_t b)
@@ -374,16 +409,16 @@ static int eth_llc_ipcp_sap_req(uint8_t r_sap,
{
int fd;
- /* reply to IRM */
+ pthread_rwlock_rdlock(&ipcpi.state_lock);
+ pthread_rwlock_wrlock(&eth_llc_data.flows_lock);
+
+ /* reply to IRM, called under lock to prevent race */
fd = ipcp_flow_req_arr(getpid(), dst_name, cube);
if (fd < 0) {
log_err("Could not get new flow from IRMd.");
return -1;
}
- pthread_rwlock_rdlock(&ipcpi.state_lock);
- pthread_rwlock_wrlock(&eth_llc_data.flows_lock);
-
eth_llc_data.fd_to_ef[fd].r_sap = r_sap;
memcpy(eth_llc_data.fd_to_ef[fd].r_addr, r_addr, MAC_SIZE);
@@ -512,6 +547,28 @@ static int eth_llc_ipcp_mgmt_frame(uint8_t * buf,
return 0;
}
+static void * eth_llc_ipcp_mgmt_frame_handler(void * o)
+{
+ (void) o;
+
+ while (true) {
+ pthread_mutex_lock(&eth_llc_data.mgmt_frame_lock);
+
+ pthread_cleanup_push((void(*)(void *)) pthread_mutex_unlock,
+ (void *) &eth_llc_data.mgmt_frame_lock);
+
+ while (eth_llc_data.mgmt_frame_arrived == false)
+ pthread_cond_wait(&eth_llc_data.mgmt_frame_cond,
+ &eth_llc_data.mgmt_frame_lock);
+
+ eth_llc_ipcp_mgmt_frame(eth_llc_data.mgmt_frame_buf,
+ eth_llc_data.mgmt_frame_len,
+ eth_llc_data.mgmt_frame_r_addr);
+ eth_llc_data.mgmt_frame_arrived = false;
+ pthread_cleanup_pop(true);
+ }
+}
+
static void * eth_llc_ipcp_sdu_reader(void * o)
{
uint8_t br_addr[MAC_SIZE];
@@ -609,9 +666,17 @@ static void * eth_llc_ipcp_sdu_reader(void * o)
ssap = reverse_bits(llc_frame->ssap);
if (ssap == MGMT_SAP && dsap == MGMT_SAP) {
- eth_llc_ipcp_mgmt_frame(&llc_frame->payload,
- length,
- llc_frame->src_hwaddr);
+ pthread_mutex_lock(&eth_llc_data.mgmt_frame_lock);
+ memcpy(eth_llc_data.mgmt_frame_buf,
+ &llc_frame->payload,
+ length);
+ memcpy(eth_llc_data.mgmt_frame_r_addr,
+ llc_frame->src_hwaddr,
+ MAC_SIZE);
+ eth_llc_data.mgmt_frame_len = length;
+ eth_llc_data.mgmt_frame_arrived = true;
+ pthread_cond_signal(&eth_llc_data.mgmt_frame_cond);
+ pthread_mutex_unlock(&eth_llc_data.mgmt_frame_lock);
} else {
pthread_rwlock_rdlock(&eth_llc_data.flows_lock);
@@ -893,6 +958,11 @@ static int eth_llc_ipcp_bootstrap(struct dif_config * conf)
ipcp_set_state(IPCP_OPERATIONAL);
+ pthread_create(&eth_llc_data.mgmt_frame_handler,
+ NULL,
+ eth_llc_ipcp_mgmt_frame_handler,
+ NULL);
+
pthread_create(&eth_llc_data.sdu_reader,
NULL,
eth_llc_ipcp_sdu_reader,
@@ -1203,8 +1273,10 @@ int main(int argc,
if (ipcp_get_state() == IPCP_SHUTDOWN) {
pthread_cancel(eth_llc_data.sdu_reader);
pthread_cancel(eth_llc_data.sdu_writer);
+ pthread_cancel(eth_llc_data.mgmt_frame_handler);
pthread_join(eth_llc_data.sdu_writer, NULL);
pthread_join(eth_llc_data.sdu_reader, NULL);
+ pthread_join(eth_llc_data.mgmt_frame_handler, NULL);
}
eth_llc_data_fini();