proxmox-mirrors/mirror_iproute2
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_iproute2 synced 2025-08-14 05:16:11 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

libnetlink: add nl_print_policy() helper

Browse Source 
This prints out the data from the given nested attribute
to the given FILE pointer, interpreting the firmware that
the kernel has for showing netlink policies.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David Ahern <dsahern@gmail.com>
This commit is contained in:
Johannes Berg 2020-08-24 19:51:07 +02:00 committed by David Ahern
parent 784fa9f62f
commit d5acae244f
2 changed files with 75 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/libnetlink.h
View File

@ -289,4 +289,6 @@ int rtnl_from_file(FILE *, rtnl_listen_filter_t handler,
RTA_OK(attr, RTA_PAYLOAD(nest) - ((char *)(attr) - (char *)RTA_DATA((nest)))); \
(attr) = RTA_TAIL((attr)))
void nl_print_policy(const struct rtattr *attr, FILE *fp);
#endif /* __LIBNETLINK_H__ */

73
lib/libnetlink.c
View File

@ -28,6 +28,7 @@
#include <linux/nexthop.h>
#include "libnetlink.h"
#include "utils.h"
#define __aligned(x) __attribute__((aligned(x)))
@ -1440,3 +1441,75 @@ int __parse_rtattr_nested_compat(struct rtattr *tb[], int max,
memset(tb, 0, sizeof(struct rtattr *) * (max + 1));
return 0;
}
static const char *get_nla_type_str(unsigned int attr)
{
switch (attr) {
#define C(x) case NL_ATTR_TYPE_ ## x: return #x
C(U8);
C(U16);
C(U32);
C(U64);
C(STRING);
C(FLAG);
C(NESTED);
C(NESTED_ARRAY);
C(NUL_STRING);
C(BINARY);
C(S8);
C(S16);
C(S32);
C(S64);
C(BITFIELD32);
default:
return "unknown";
}
}
void nl_print_policy(const struct rtattr *attr, FILE *fp)
{
const struct rtattr *pos;
rtattr_for_each_nested(pos, attr) {
const struct rtattr *attr;
fprintf(fp, " policy[%u]:", pos->rta_type & ~NLA_F_NESTED);
rtattr_for_each_nested(attr, pos) {
struct rtattr *tp[NL_POLICY_TYPE_ATTR_MAX + 1];
parse_rtattr_nested(tp, ARRAY_SIZE(tp) - 1, attr);
if (tp[NL_POLICY_TYPE_ATTR_TYPE])
fprintf(fp, "attr[%u]: type=%s",
attr->rta_type & ~NLA_F_NESTED,
get_nla_type_str(rta_getattr_u32(tp[NL_POLICY_TYPE_ATTR_TYPE])));
if (tp[NL_POLICY_TYPE_ATTR_POLICY_IDX])
fprintf(fp, " policy:%u",
rta_getattr_u32(tp[NL_POLICY_TYPE_ATTR_POLICY_IDX]));
if (tp[NL_POLICY_TYPE_ATTR_POLICY_MAXTYPE])
fprintf(fp, " maxattr:%u",
rta_getattr_u32(tp[NL_POLICY_TYPE_ATTR_POLICY_MAXTYPE]));
if (tp[NL_POLICY_TYPE_ATTR_MIN_VALUE_S] && tp[NL_POLICY_TYPE_ATTR_MAX_VALUE_S])
fprintf(fp, " range:[%lld,%lld]",
(signed long long)rta_getattr_u64(tp[NL_POLICY_TYPE_ATTR_MIN_VALUE_S]),
(signed long long)rta_getattr_u64(tp[NL_POLICY_TYPE_ATTR_MAX_VALUE_S]));
if (tp[NL_POLICY_TYPE_ATTR_MIN_VALUE_U] && tp[NL_POLICY_TYPE_ATTR_MAX_VALUE_U])
fprintf(fp, " range:[%llu,%llu]",
(unsigned long long)rta_getattr_u64(tp[NL_POLICY_TYPE_ATTR_MIN_VALUE_U]),
(unsigned long long)rta_getattr_u64(tp[NL_POLICY_TYPE_ATTR_MAX_VALUE_U]));
if (tp[NL_POLICY_TYPE_ATTR_MIN_LENGTH])
fprintf(fp, " min len:%u",
rta_getattr_u32(tp[NL_POLICY_TYPE_ATTR_MIN_LENGTH]));
if (tp[NL_POLICY_TYPE_ATTR_MAX_LENGTH])
fprintf(fp, " max len:%u",
rta_getattr_u32(tp[NL_POLICY_TYPE_ATTR_MAX_LENGTH]));
}
}
}