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genl: add parser for nlsysevent

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genl monitor nlsysevent is now able to print the messages received

(cherry picked from commit 883722891a)
This commit is contained in:
Baptiste Daroussin 2024-10-07 11:43:50 +02:00
parent 58aca16340
commit 379b9c6e7c
1 changed files with 34 additions and 0 deletions
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34
usr.bin/genl/genl.c
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@ -40,10 +40,12 @@
#include <netlink/netlink_generic.h>
#include <netlink/netlink_snl.h>
#include <netlink/netlink_snl_generic.h>
#include <netlink/netlink_sysevent.h>
static int monitor_mcast(int argc, char **argv);
static int list_families(int argc, char **argv);
static void parser_nlctrl_notify(struct snl_state *ss, struct nlmsghdr *hdr);
static void parser_nlsysevent(struct snl_state *ss, struct nlmsghdr *hdr);
static void parser_fallback(struct snl_state *ss, struct nlmsghdr *hdr);
static struct commands {
@ -60,8 +62,25 @@ static struct mcast_parsers {
void (*parser)(struct snl_state *ss, struct nlmsghdr *hdr);
} mcast_parsers [] = {
{ "nlctrl", parser_nlctrl_notify },
{ "nlsysevent", parser_nlsysevent },
};
struct nlevent {
const char *name;
const char *subsystem;
const char *type;
const char *data;
};
#define _OUT(_field) offsetof(struct nlevent, _field)
static struct snl_attr_parser ap_nlevent_get[] = {
{ .type = NLSE_ATTR_SYSTEM, .off = _OUT(name), .cb = snl_attr_get_string },
{ .type = NLSE_ATTR_SUBSYSTEM, .off = _OUT(subsystem), .cb = snl_attr_get_string },
{ .type = NLSE_ATTR_TYPE, .off = _OUT(type), .cb = snl_attr_get_string },
{ .type = NLSE_ATTR_DATA, .off = _OUT(data), .cb = snl_attr_get_string },
};
#undef _OUT
SNL_DECLARE_GENL_PARSER(nlevent_get_parser, ap_nlevent_get);
struct genl_ctrl_op {
uint32_t id;
uint32_t flags;
@ -183,6 +202,20 @@ parser_nlctrl_notify(struct snl_state *ss, struct nlmsghdr *hdr)
dump_family(&family);
}
void
parser_nlsysevent(struct snl_state *ss, struct nlmsghdr *hdr)
{
struct nlevent ne = {};
if (snl_parse_nlmsg(ss, hdr, &nlevent_get_parser, &ne)) {
printf("system=%s subsystem=%s type=%s", ne.name, ne.subsystem, ne.type);
if (ne.data) {
printf(" %s", ne.data);
if (ne.data[strlen(ne.data) -1] != '\n')
printf("\n");
}
}
}
void
parser_fallback(struct snl_state *ss __unused, struct nlmsghdr *hdr __unused)
{
@ -209,6 +242,7 @@ monitor_mcast(int argc __unused, char **argv)
usage();
return (EXIT_FAILURE);
}
if (!snl_get_genl_family_info(&ss, argv[0], &attrs))
errx(EXIT_FAILURE, "Unknown family '%s'", argv[0]);
if (argc == 1)