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| author | Vlad Yasevich <vladislav.yasevich@hp.com> | 2007-09-17 02:53:56 +0400 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-11 03:51:23 +0400 |
| commit | 131a47e31ab1a9defd50ff16b04008ab94c21c0d (patch) | |
| tree | 8ac3eb522333d1b6f9bd5741a8decbfb4220f432 /include | |
| parent | 76c72d4f44ec5fb7f88eda8a0d3aa30922c891d1 (diff) | |
| download | linux-131a47e31ab1a9defd50ff16b04008ab94c21c0d.tar.xz | |
[SCTP]: Implement the Supported Extensions Parameter
SCTP Supported Extenions parameter is specified in Section 4.2.7
of the ADD-IP draft (soon to be RFC). The parameter is
encoded as:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Parameter Type = 0x8008 | Parameter Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| CHUNK TYPE 1 | CHUNK TYPE 2 | CHUNK TYPE 3 | CHUNK TYPE 4 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| .... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| CHUNK TYPE N | PAD | PAD | PAD |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
It contains a list of chunks that a particular SCTP extension
uses. Current extensions supported are Partial Reliability
(FWD-TSN) and ADD-IP (ASCONF and ASCONF-ACK).
When implementing new extensions (AUTH, PKT-DROP, etc..), new
chunks need to be added to this parameter. Parameter processing
would be modified to negotiate support for these new features.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/sctp.h | 9 | ||||
| -rw-r--r-- | include/net/sctp/structs.h | 1 |
2 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/sctp.h b/include/linux/sctp.h index d70df61a029f..f4d717b72ddd 100644 --- a/include/linux/sctp.h +++ b/include/linux/sctp.h @@ -180,6 +180,9 @@ typedef enum { SCTP_PARAM_SUPPORTED_ADDRESS_TYPES = __constant_htons(12), SCTP_PARAM_ECN_CAPABLE = __constant_htons(0x8000), + /* Add-IP: Supported Extensions, Section 4.2 */ + SCTP_PARAM_SUPPORTED_EXT = __constant_htons(0x8008), + /* PR-SCTP Sec 3.1 */ SCTP_PARAM_FWD_TSN_SUPPORT = __constant_htons(0xc000), @@ -296,6 +299,12 @@ typedef struct sctp_adaptation_ind_param { __be32 adaptation_ind; } __attribute__((packed)) sctp_adaptation_ind_param_t; +/* ADDIP Section 4.2.7 Supported Extensions Parameter */ +typedef struct sctp_supported_ext_param { + struct sctp_paramhdr param_hdr; + __u8 chunks[0]; +} __attribute__((packed)) sctp_supported_ext_param_t; + /* RFC 2960. Section 3.3.3 Initiation Acknowledgement (INIT ACK) (2): * The INIT ACK chunk is used to acknowledge the initiation of an SCTP * association. diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index 67c91d01b635..b4812a2d3bb0 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -440,6 +440,7 @@ union sctp_params { struct sctp_ipv6addr_param *v6; union sctp_addr_param *addr; struct sctp_adaptation_ind_param *aind; + struct sctp_supported_ext_param *ext; }; /* RFC 2960. Section 3.3.5 Heartbeat. |