xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

sctp: add support for SCTP AUTH Information for sendmsg

Browse Source 
This patch is to add support for SCTP AUTH Information for sendmsg,
as described in section 5.3.8 of RFC6458.

With this option, you can provide shared key identifier used for
sending the user message.

It's also a necessary send info for sctp_sendv.

Note that it reuses sinfo->sinfo_tsn to indicate if this option is
set and sinfo->sinfo_ssn to save the shkey ID which can be 0.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long
2018-03-14 19:05:31 +08:00
committed by David S. Miller
parent 1b1e0bc994
commit 3ff547c06a
4 changed files with 47 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
net/sctp/socket.c
View File

@@ -1987,6 +1987,14 @@ static void sctp_sendmsg_update_sinfo(struct sctp_association *asoc,
if (!cmsgs->srinfo && !cmsgs->prinfo)
sinfo->sinfo_timetolive = asoc->default_timetolive;
if (cmsgs->authinfo) {
/* Reuse sinfo_tsn to indicate that authinfo was set and
* sinfo_ssn to save the keyid on tx path.
*/
sinfo->sinfo_tsn = 1;
sinfo->sinfo_ssn = cmsgs->authinfo->auth_keynumber;
}
}
static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len)
@@ -7874,6 +7882,21 @@ static int sctp_msghdr_parse(const struct msghdr *msg, struct sctp_cmsgs *cmsgs)
if (cmsgs->prinfo->pr_policy == SCTP_PR_SCTP_NONE)
cmsgs->prinfo->pr_value = 0;
break;
case SCTP_AUTHINFO:
/* SCTP Socket API Extension
* 5.3.8 SCTP AUTH Information Structure (SCTP_AUTHINFO)
*
* This cmsghdr structure specifies SCTP options for sendmsg().
*
* cmsg_level cmsg_type cmsg_data[]
* ------------ ------------ ---------------------
* IPPROTO_SCTP SCTP_AUTHINFO struct sctp_authinfo
*/
if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_authinfo)))
return -EINVAL;
cmsgs->authinfo = CMSG_DATA(cmsg);
break;
case SCTP_DSTADDRV4:
case SCTP_DSTADDRV6:
/* SCTP Socket API Extension