GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

sctp: add sctp_auth_init and sctp_auth_free

Browse source 
This patch is to factor out sctp_auth_init and sctp_auth_free
functions, and sctp_auth_init will also be used in the next
patch for SCTP_AUTH_SUPPORTED sockopt.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2019-08-19 22:02:48 +08:00 • committed by David S. Miller
parent 219f9ea4d3
commit 03f961270f
3 changed files with 76 additions and 56 deletions
Download patch file Download diff file Expand all files Collapse all files

69
net/sctp/auth.c
View file

@ -1007,3 +1007,72 @@ int sctp_auth_deact_key_id(struct sctp_endpoint *ep,
return 0;
}
int sctp_auth_init(struct sctp_endpoint *ep, gfp_t gfp)
{
int err = -ENOMEM;
/* Allocate space for HMACS and CHUNKS authentication
* variables. There are arrays that we encode directly
* into parameters to make the rest of the operations easier.
*/
if (!ep->auth_hmacs_list) {
struct sctp_hmac_algo_param *auth_hmacs;
auth_hmacs = kzalloc(struct_size(auth_hmacs, hmac_ids,
SCTP_AUTH_NUM_HMACS), gfp);
if (!auth_hmacs)
goto nomem;
/* Initialize the HMACS parameter.
* SCTP-AUTH: Section 3.3
* Every endpoint supporting SCTP chunk authentication MUST
* support the HMAC based on the SHA-1 algorithm.
*/
auth_hmacs->param_hdr.type = SCTP_PARAM_HMAC_ALGO;
auth_hmacs->param_hdr.length =
htons(sizeof(struct sctp_paramhdr) + 2);
auth_hmacs->hmac_ids[0] = htons(SCTP_AUTH_HMAC_ID_SHA1);
ep->auth_hmacs_list = auth_hmacs;
}
if (!ep->auth_chunk_list) {
struct sctp_chunks_param *auth_chunks;
auth_chunks = kzalloc(sizeof(*auth_chunks) +
SCTP_NUM_CHUNK_TYPES, gfp);
if (!auth_chunks)
goto nomem;
/* Initialize the CHUNKS parameter */
auth_chunks->param_hdr.type = SCTP_PARAM_CHUNKS;
auth_chunks->param_hdr.length =
htons(sizeof(struct sctp_paramhdr));
ep->auth_chunk_list = auth_chunks;
}
/* Allocate and initialize transorms arrays for supported
* HMACs.
*/
err = sctp_auth_init_hmacs(ep, gfp);
if (err)
goto nomem;
return 0;
nomem:
/* Free all allocations */
kfree(ep->auth_hmacs_list);
kfree(ep->auth_chunk_list);
ep->auth_hmacs_list = NULL;
ep->auth_chunk_list = NULL;
return err;
}
void sctp_auth_free(struct sctp_endpoint *ep)
{
kfree(ep->auth_hmacs_list);
kfree(ep->auth_chunk_list);
ep->auth_hmacs_list = NULL;
ep->auth_chunk_list = NULL;
sctp_auth_destroy_hmacs(ep->auth_hmacs);
ep->auth_hmacs = NULL;
}