diff options
| -rw-r--r-- | sys/netinet/sctp_indata.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/sys/netinet/sctp_indata.c b/sys/netinet/sctp_indata.c index e6713a3..83ab59f 100644 --- a/sys/netinet/sctp_indata.c +++ b/sys/netinet/sctp_indata.c @@ -2245,15 +2245,19 @@ sctp_slide_mapping_arrays(struct sctp_tcb *stcb) /* * Now we also need to check the mapping array in a couple of ways. * 1) Did we move the cum-ack point? + * + * When you first glance at this you might think that all entries that + * make up the postion of the cum-ack would be in the nr-mapping + * array only.. i.e. things up to the cum-ack are always + * deliverable. Thats true with one exception, when its a fragmented + * message we may not deliver the data until some threshold (or all + * of it) is in place. So we must OR the nr_mapping_array and + * mapping_array to get a true picture of the cum-ack. */ struct sctp_association *asoc; int at; + uint8_t val; int slide_from, slide_end, lgap, distance; - - /* EY nr_mapping array variables */ - /* int nr_at; */ - /* int nr_last_all_ones = 0; */ - /* int nr_slide_from, nr_slide_end, nr_lgap, nr_distance; */ uint32_t old_cumack, old_base, old_highest, highest_tsn; asoc = &stcb->asoc; @@ -2268,11 +2272,12 @@ sctp_slide_mapping_arrays(struct sctp_tcb *stcb) */ at = 0; for (slide_from = 0; slide_from < stcb->asoc.mapping_array_size; slide_from++) { - if (asoc->nr_mapping_array[slide_from] == 0xff) { + val = asoc->nr_mapping_array[slide_from] | asoc->mapping_array[slide_from]; + if (val == 0xff) { at += 8; } else { /* there is a 0 bit */ - at += sctp_map_lookup_tab[asoc->nr_mapping_array[slide_from]]; + at += sctp_map_lookup_tab[val]; break; } } |
