From ed63afb8a318f6b3558d76afba7809daee4f28e5 Mon Sep 17 00:00:00 2001 From: Xin Long Date: Mon, 5 Mar 2018 20:44:18 +0800 Subject: sctp: add support for PR-SCTP Information for sendmsg This patch is to add support for PR-SCTP Information for sendmsg, as described in section 5.3.7 of RFC6458. With this option, you can specify pr_policy and pr_value for user data in sendmsg. It's also a necessary send info for sctp_sendv. Signed-off-by: Xin Long Acked-by: Marcelo Ricardo Leitner Signed-off-by: David S. Miller --- include/net/sctp/structs.h | 1 + include/uapi/linux/sctp.h | 15 +++++++++++++++ 2 files changed, 16 insertions(+) (limited to 'include') diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index 03e92dda1813..d40a2a329888 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -2112,6 +2112,7 @@ struct sctp_cmsgs { struct sctp_initmsg *init; struct sctp_sndrcvinfo *srinfo; struct sctp_sndinfo *sinfo; + struct sctp_prinfo *prinfo; }; /* Structure for tracking memory objects */ diff --git a/include/uapi/linux/sctp.h b/include/uapi/linux/sctp.h index 4c4db14786bd..0dd1f82a4fa8 100644 --- a/include/uapi/linux/sctp.h +++ b/include/uapi/linux/sctp.h @@ -260,6 +260,19 @@ struct sctp_nxtinfo { sctp_assoc_t nxt_assoc_id; }; +/* 5.3.7 SCTP PR-SCTP Information Structure (SCTP_PRINFO) + * + * This cmsghdr structure specifies SCTP options for sendmsg(). + * + * cmsg_level cmsg_type cmsg_data[] + * ------------ ------------ ------------------- + * IPPROTO_SCTP SCTP_PRINFO struct sctp_prinfo + */ +struct sctp_prinfo { + __u16 pr_policy; + __u32 pr_value; +}; + /* * sinfo_flags: 16 bits (unsigned integer) * @@ -293,6 +306,8 @@ typedef enum sctp_cmsg_type { #define SCTP_RCVINFO SCTP_RCVINFO SCTP_NXTINFO, /* 5.3.6 SCTP Next Receive Information Structure */ #define SCTP_NXTINFO SCTP_NXTINFO + SCTP_PRINFO, /* 5.3.7 SCTP PR-SCTP Information Structure */ +#define SCTP_PRINFO SCTP_PRINFO } sctp_cmsg_t; /* -- cgit v1.2.3