diff options
Diffstat (limited to 'sys/netinet/sctp_constants.h')
| -rw-r--r-- | sys/netinet/sctp_constants.h | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/sys/netinet/sctp_constants.h b/sys/netinet/sctp_constants.h index 97b8c87..9cd5432 100644 --- a/sys/netinet/sctp_constants.h +++ b/sys/netinet/sctp_constants.h @@ -40,26 +40,22 @@ __FBSDID("$FreeBSD$"); #define SCTP_DEFAULT_SACK_FREQ 2 /* Address limit - This variable is calculated - * based on an 1500 byte mtu. We take out 100 bytes + * based on an 65535 byte max ip packet. We take out 100 bytes * for the cookie, 40 bytes for a v6 header and 32 * bytes for the init structure. A second init structure * for the init-ack and then finally a third one for the * imbedded init. This yeilds 100+40+(3 * 32) = 236 bytes. - * This leaves 1264 bytes for addresses. Now whatever we - * send in the INIT() we need to allow to get back in the + * This leaves 65299 bytes for addresses. We throw out the 299 bytes. + * Now whatever we send in the INIT() we need to allow to get back in the * INIT-ACK plus all the values from INIT and INIT-ACK * listed in the cookie. Plus we need some overhead for * maybe copied parameters in the COOKIE. If we - * allow 20 addresses, and each side has 20 V6 addresses - * that will be 400 bytes. In the INIT-ACK we will - * see the INIT-ACK 400 + 800 in the cookie. This leaves - * 64 bytes slack for misc things in the cookie. Otherwise - * we need to allow IP fragmentation.. which I believe - * the INIT-ACK and COOKIE do, I don't think we do that - * to the INIT though. So the max you could make this - * value is 60 addresses. + * allow 1080 addresses, and each side has 1080 V6 addresses + * that will be 21600 bytes. In the INIT-ACK we will + * see the INIT-ACK 21600 + 43200 in the cookie. This leaves + * about 500 bytes slack for misc things in the cookie. */ -#define SCTP_ADDRESS_LIMIT 20 +#define SCTP_ADDRESS_LIMIT 1080 /* Number of addresses where we just skip the counting */ #define SCTP_COUNT_LIMIT 40 |
