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sctp: Add ip option support

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Add ip option support to allow LSM security modules to utilise CIPSO/IPv4
and CALIPSO/IPv6 services.

Signed-off-by: Richard Haines <richard_c_haines@btinternet.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Richard Haines
2018-02-24 16:18:51 +00:00
committed by Paul Moore
parent 72e89f5008
commit b7e10c25b8
7 changed files with 122 additions and 27 deletions
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4
include/net/sctp/sctp.h
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@@ -441,9 +441,11 @@ static inline int sctp_list_single_entry(struct list_head *head)
static inline int sctp_frag_point(const struct sctp_association *asoc, int pmtu)
{
struct sctp_sock *sp = sctp_sk(asoc->base.sk);
struct sctp_af *af = sp->pf->af;
int frag = pmtu;
frag -= sp->pf->af->net_header_len;
frag -= af->ip_options_len(asoc->base.sk);
frag -= af->net_header_len;
frag -= sizeof(struct sctphdr) + sctp_datachk_len(&asoc->stream);
if (asoc->user_frag)