@@ -76,6 +76,19 @@ struct top_srv {
static struct top_srv topsrv = { 0 };
/**
+ * htohl - convert value to endianness used by destination
+ * @in: value to convert
+ * @swap: non-zero if endianness must be reversed
+ *
+ * Returns converted value
+ */
+
+static u32 htohl(u32 in, int swap)
+{
+ return swap ? swab32(in) : in;
+}
+
+/**
* subscr_send_event - send a message containing a tipc_event to the subscriber
*
* Note: Must not hold subscriber's server port lock, since tipc_send() will
@@ -94,11 +107,11 @@ static void subscr_send_event(struct subscription *sub,
msg_sect.iov_base = (void *)&sub->evt;
msg_sect.iov_len = sizeof(struct tipc_event);
- sub->evt.event = htonl(event);
- sub->evt.found_lower = htonl(found_lower);
- sub->evt.found_upper = htonl(found_upper);
- sub->evt.port.ref = htonl(port_ref);
- sub->evt.port.node = htonl(node);
+ sub->evt.event = htohl(event, sub->swap);
+ sub->evt.found_lower = htohl(found_lower, sub->swap);
+ sub->evt.found_upper = htohl(found_upper, sub->swap);
+ sub->evt.port.ref = htohl(port_ref, sub->swap);
+ sub->evt.port.node = htohl(node, sub->swap);
tipc_send(sub->server_ref, 1, &msg_sect);
}
@@ -274,23 +287,16 @@ static void subscr_cancel(struct tipc_subscr *s,
{
struct subscription *sub;
struct subscription *sub_temp;
- __u32 type, lower, upper;
int found = 0;
/* Find first matching subscription, exit if not found */
- type = ntohl(s->seq.type);
- lower = ntohl(s->seq.lower);
- upper = ntohl(s->seq.upper);
-
list_for_each_entry_safe(sub, sub_temp, &subscriber->subscription_list,
subscription_list) {
- if ((type == sub->seq.type) &&
- (lower == sub->seq.lower) &&
- (upper == sub->seq.upper)) {
- found = 1;
- break;
- }
+ if (!memcmp(s, &sub->evt.s, sizeof(struct tipc_subscr))) {
+ found = 1;
+ break;
+ }
}
if (!found)
return;
@@ -319,10 +325,16 @@ static struct subscription *subscr_subscribe(struct tipc_subscr *s,
struct subscriber *subscriber)
{
struct subscription *sub;
+ int swap;
+
+ /* Determine subscriber's endianness */
+
+ swap = !(s->filter & (TIPC_SUB_PORTS | TIPC_SUB_SERVICE));
/* Detect & process a subscription cancellation request */
- if (ntohl(s->filter) & TIPC_SUB_CANCEL) {
+ if (s->filter & htohl(TIPC_SUB_CANCEL, swap)) {
+ s->filter &= ~htohl(TIPC_SUB_CANCEL, swap);
subscr_cancel(s, subscriber);
return NULL;
}
@@ -347,11 +359,11 @@ static struct subscription *subscr_subscribe(struct tipc_subscr *s,
/* Initialize subscription object */
- sub->seq.type = ntohl(s->seq.type);
- sub->seq.lower = ntohl(s->seq.lower);
- sub->seq.upper = ntohl(s->seq.upper);
- sub->timeout = ntohl(s->timeout);
- sub->filter = ntohl(s->filter);
+ sub->seq.type = htohl(s->seq.type, swap);
+ sub->seq.lower = htohl(s->seq.lower, swap);
+ sub->seq.upper = htohl(s->seq.upper, swap);
+ sub->timeout = htohl(s->timeout, swap);
+ sub->filter = htohl(s->filter, swap);
if ((!(sub->filter & TIPC_SUB_PORTS) ==
!(sub->filter & TIPC_SUB_SERVICE)) ||
(sub->seq.lower > sub->seq.upper)) {
@@ -364,6 +376,7 @@ static struct subscription *subscr_subscribe(struct tipc_subscr *s,
INIT_LIST_HEAD(&sub->nameseq_list);
list_add(&sub->subscription_list, &subscriber->subscription_list);
sub->server_ref = subscriber->port_ref;
+ sub->swap = swap;
memcpy(&sub->evt.s, s, sizeof(struct tipc_subscr));
atomic_inc(&topsrv.subscription_count);
if (sub->timeout != TIPC_WAIT_FOREVER) {
@@ -53,6 +53,7 @@ typedef void (*tipc_subscr_event) (struct subscription *sub,
* @nameseq_list: adjacent subscriptions in name sequence's subscription list
* @subscription_list: adjacent subscriptions in subscriber's subscription list
* @server_ref: object reference of server port associated with subscription
+ * @swap: indicates if subscriber uses opposite endianness in its messages
* @evt: template for events generated by subscription
*/
@@ -65,6 +66,7 @@ struct subscription {
struct list_head nameseq_list;
struct list_head subscription_list;
u32 server_ref;
+ int swap;
struct tipc_event evt;
};