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xfrm security context support

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Adds security context support to ip xfrm policy.

Signed-off-by: Joy Latten <latten@austin.ibm.com>
This commit is contained in:
Joy Latten 2011-02-02 17:32:18 -06:00 committed by Stephen Hemminger
parent 2c319e1ab7
commit e5055b591b
1 changed files with 60 additions and 2 deletions
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62
ip/xfrm_policy.c
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@ -48,14 +48,15 @@
#define NLMSG_BUF_SIZE 4096 #define NLMSG_BUF_SIZE 4096
#define RTA_BUF_SIZE 2048 #define RTA_BUF_SIZE 2048
#define XFRM_TMPLS_BUF_SIZE 1024 #define XFRM_TMPLS_BUF_SIZE 1024
#define CTX_BUF_SIZE 256
static void usage(void) __attribute__((noreturn)); static void usage(void) __attribute__((noreturn));
static void usage(void) static void usage(void)
{ {
fprintf(stderr, "Usage: ip xfrm policy { add | update } dir DIR SELECTOR [ index INDEX ] [ ptype PTYPE ]\n"); fprintf(stderr, "Usage: ip xfrm policy { add | update } dir DIR SELECTOR [ ctx SEC_CTX ][ index INDEX ] [ ptype PTYPE ]\n");
fprintf(stderr, " [ action ACTION ] [ priority PRIORITY ] [ flag FLAG-LIST ] [ LIMIT-LIST ] [ TMPL-LIST ] [mark MARK [mask MASK]]\n"); fprintf(stderr, " [ action ACTION ] [ priority PRIORITY ] [ flag FLAG-LIST ] [ LIMIT-LIST ] [ TMPL-LIST ] [mark MARK [mask MASK]]\n");
fprintf(stderr, "Usage: ip xfrm policy { delete | get } dir DIR [ SELECTOR | index INDEX ] [ ptype PTYPE ] [mark MARK [mask MASK]]\n"); fprintf(stderr, "Usage: ip xfrm policy { delete | get } dir DIR [ SELECTOR | index INDEX ] [ ctx SEC_CTX ][ ptype PTYPE ] [mark MARK [mask MASK]]\n");
fprintf(stderr, "Usage: ip xfrm policy { deleteall | list } [ dir DIR ] [ SELECTOR ]\n"); fprintf(stderr, "Usage: ip xfrm policy { deleteall | list } [ dir DIR ] [ SELECTOR ]\n");
fprintf(stderr, " [ index INDEX ] [ action ACTION ] [ priority PRIORITY ] [ flag FLAG-LIST ]\n"); fprintf(stderr, " [ index INDEX ] [ action ACTION ] [ priority PRIORITY ] [ flag FLAG-LIST ]\n");
fprintf(stderr, "Usage: ip xfrm policy flush [ ptype PTYPE ]\n"); fprintf(stderr, "Usage: ip xfrm policy flush [ ptype PTYPE ]\n");
@ -222,6 +223,23 @@ static int xfrm_tmpl_parse(struct xfrm_user_tmpl *tmpl,
return 0; return 0;
} }
int xfrm_sctx_parse(char *ctxstr, char *s,
struct xfrm_user_sec_ctx *sctx)
{
int slen;
slen = strlen(s) + 1;
sctx->exttype = XFRMA_SEC_CTX;
sctx->ctx_doi = 1;
sctx->ctx_alg = 1;
sctx->ctx_len = slen;
sctx->len = sizeof(struct xfrm_user_sec_ctx) + slen;
memcpy(ctxstr, s, slen);
return 0;
}
static int xfrm_policy_modify(int cmd, unsigned flags, int argc, char **argv) static int xfrm_policy_modify(int cmd, unsigned flags, int argc, char **argv)
{ {
struct rtnl_handle rth; struct rtnl_handle rth;
@ -233,14 +251,20 @@ static int xfrm_policy_modify(int cmd, unsigned flags, int argc, char **argv)
char *dirp = NULL; char *dirp = NULL;
char *selp = NULL; char *selp = NULL;
char *ptypep = NULL; char *ptypep = NULL;
char *sctxp = NULL;
struct xfrm_userpolicy_type upt; struct xfrm_userpolicy_type upt;
char tmpls_buf[XFRM_TMPLS_BUF_SIZE]; char tmpls_buf[XFRM_TMPLS_BUF_SIZE];
int tmpls_len = 0; int tmpls_len = 0;
struct xfrm_mark mark = {0, 0}; struct xfrm_mark mark = {0, 0};
struct {
struct xfrm_user_sec_ctx sctx;
char str[CTX_BUF_SIZE];
} ctx;
memset(&req, 0, sizeof(req)); memset(&req, 0, sizeof(req));
memset(&upt, 0, sizeof(upt)); memset(&upt, 0, sizeof(upt));
memset(&tmpls_buf, 0, sizeof(tmpls_buf)); memset(&tmpls_buf, 0, sizeof(tmpls_buf));
memset(&ctx, 0, sizeof(ctx));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpinfo)); req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpinfo));
req.n.nlmsg_flags = NLM_F_REQUEST|flags; req.n.nlmsg_flags = NLM_F_REQUEST|flags;
@ -260,6 +284,15 @@ static int xfrm_policy_modify(int cmd, unsigned flags, int argc, char **argv)
NEXT_ARG(); NEXT_ARG();
xfrm_policy_dir_parse(&req.xpinfo.dir, &argc, &argv); xfrm_policy_dir_parse(&req.xpinfo.dir, &argc, &argv);
} else if (strcmp(*argv, "ctx") == 0) {
char *context;
if (sctxp)
duparg("ctx", *argv);
sctxp = *argv;
NEXT_ARG();
context = *argv;
xfrm_sctx_parse((char *)&ctx.str, context, &ctx.sctx);
} else if (strcmp(*argv, "mark") == 0) { } else if (strcmp(*argv, "mark") == 0) {
xfrm_parse_mark(&mark, &argc, &argv); xfrm_parse_mark(&mark, &argc, &argv);
} else if (strcmp(*argv, "index") == 0) { } else if (strcmp(*argv, "index") == 0) {
@ -347,6 +380,10 @@ static int xfrm_policy_modify(int cmd, unsigned flags, int argc, char **argv)
} }
} }
if (sctxp) {
addattr_l(&req.n, sizeof(req), XFRMA_SEC_CTX,
(void *)&ctx, ctx.sctx.len);
}
if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0) if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
exit(1); exit(1);
@ -528,11 +565,18 @@ static int xfrm_policy_get_or_delete(int argc, char **argv, int delete,
char *selp = NULL; char *selp = NULL;
char *indexp = NULL; char *indexp = NULL;
char *ptypep = NULL; char *ptypep = NULL;
char *sctxp = NULL;
struct xfrm_userpolicy_type upt; struct xfrm_userpolicy_type upt;
struct xfrm_mark mark = {0, 0}; struct xfrm_mark mark = {0, 0};
struct {
struct xfrm_user_sec_ctx sctx;
char str[CTX_BUF_SIZE];
} ctx;
memset(&req, 0, sizeof(req)); memset(&req, 0, sizeof(req));
memset(&upt, 0, sizeof(upt)); memset(&upt, 0, sizeof(upt));
memset(&ctx, 0, sizeof(ctx));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpid)); req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpid));
req.n.nlmsg_flags = NLM_F_REQUEST; req.n.nlmsg_flags = NLM_F_REQUEST;
@ -547,6 +591,15 @@ static int xfrm_policy_get_or_delete(int argc, char **argv, int delete,
NEXT_ARG(); NEXT_ARG();
xfrm_policy_dir_parse(&req.xpid.dir, &argc, &argv); xfrm_policy_dir_parse(&req.xpid.dir, &argc, &argv);
} else if (strcmp(*argv, "ctx") == 0) {
char *context;
if (sctxp)
duparg("ctx", *argv);
sctxp = *argv;
NEXT_ARG();
context = *argv;
xfrm_sctx_parse((char *)&ctx.str, context, &ctx.sctx);
} else if (strcmp(*argv, "mark") == 0) { } else if (strcmp(*argv, "mark") == 0) {
xfrm_parse_mark(&mark, &argc, &argv); xfrm_parse_mark(&mark, &argc, &argv);
} else if (strcmp(*argv, "index") == 0) { } else if (strcmp(*argv, "index") == 0) {
@ -610,6 +663,11 @@ static int xfrm_policy_get_or_delete(int argc, char **argv, int delete,
} }
} }
if (sctxp) {
addattr_l(&req.n, sizeof(req), XFRMA_SEC_CTX,
(void *)&ctx, ctx.sctx.len);
}
if (rtnl_talk(&rth, &req.n, 0, 0, res_nlbuf, NULL, NULL) < 0) if (rtnl_talk(&rth, &req.n, 0, 0, res_nlbuf, NULL, NULL) < 0)
exit(2); exit(2);