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-rw-r--r--ip/ipnetconf.c88
1 files changed, 60 insertions, 28 deletions
diff --git a/ip/ipnetconf.c b/ip/ipnetconf.c
index eca6eeee..696e3dd5 100644
--- a/ip/ipnetconf.c
+++ b/ip/ipnetconf.c
@@ -19,13 +19,13 @@
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
+#include <errno.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
-static struct
-{
+static struct {
int family;
int ifindex;
} filter;
@@ -38,15 +38,25 @@ static void usage(void)
exit(-1);
}
-#define NETCONF_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct netconfmsg))))
+static void print_onoff(FILE *f, const char *flag, __u32 val)
+{
+ fprintf(f, "%s %s ", flag, val ? "on" : "off");
+}
+
+static struct rtattr *netconf_rta(struct netconfmsg *ncm)
+{
+ return (struct rtattr *)((char *)ncm
+ + NLMSG_ALIGN(sizeof(struct netconfmsg)));
+}
int print_netconf(const struct sockaddr_nl *who, struct rtnl_ctrl_data *ctrl,
struct nlmsghdr *n, void *arg)
{
- FILE *fp = (FILE*)arg;
+ FILE *fp = (FILE *)arg;
struct netconfmsg *ncm = NLMSG_DATA(n);
int len = n->nlmsg_len;
struct rtattr *tb[NETCONFA_MAX+1];
+ int ifindex = 0;
if (n->nlmsg_type == NLMSG_ERROR)
return -1;
@@ -65,9 +75,15 @@ int print_netconf(const struct sockaddr_nl *who, struct rtnl_ctrl_data *ctrl,
if (filter.family && filter.family != ncm->ncm_family)
return 0;
- parse_rtattr(tb, NETCONFA_MAX, NETCONF_RTA(ncm),
+ parse_rtattr(tb, NETCONFA_MAX, netconf_rta(ncm),
NLMSG_PAYLOAD(n, sizeof(*ncm)));
+ if (tb[NETCONFA_IFINDEX])
+ ifindex = rta_getattr_u32(tb[NETCONFA_IFINDEX]);
+
+ if (filter.ifindex && filter.ifindex != ifindex)
+ return 0;
+
switch (ncm->ncm_family) {
case AF_INET:
fprintf(fp, "ipv4 ");
@@ -75,15 +91,16 @@ int print_netconf(const struct sockaddr_nl *who, struct rtnl_ctrl_data *ctrl,
case AF_INET6:
fprintf(fp, "ipv6 ");
break;
+ case AF_MPLS:
+ fprintf(fp, "mpls ");
+ break;
default:
fprintf(fp, "unknown ");
break;
}
if (tb[NETCONFA_IFINDEX]) {
- int *ifindex = (int *)RTA_DATA(tb[NETCONFA_IFINDEX]);
-
- switch (*ifindex) {
+ switch (ifindex) {
case NETCONFA_IFINDEX_ALL:
fprintf(fp, "all ");
break;
@@ -91,16 +108,16 @@ int print_netconf(const struct sockaddr_nl *who, struct rtnl_ctrl_data *ctrl,
fprintf(fp, "default ");
break;
default:
- fprintf(fp, "dev %s ", ll_index_to_name(*ifindex));
+ fprintf(fp, "dev %s ", ll_index_to_name(ifindex));
break;
}
}
if (tb[NETCONFA_FORWARDING])
- fprintf(fp, "forwarding %s ",
- *(int *)RTA_DATA(tb[NETCONFA_FORWARDING])?"on":"off");
+ print_onoff(fp, "forwarding",
+ rta_getattr_u32(tb[NETCONFA_FORWARDING]));
if (tb[NETCONFA_RP_FILTER]) {
- int rp_filter = *(int *)RTA_DATA(tb[NETCONFA_RP_FILTER]);
+ __u32 rp_filter = rta_getattr_u32(tb[NETCONFA_RP_FILTER]);
if (rp_filter == 0)
fprintf(fp, "rp_filter off ");
@@ -112,12 +129,19 @@ int print_netconf(const struct sockaddr_nl *who, struct rtnl_ctrl_data *ctrl,
fprintf(fp, "rp_filter unknown mode ");
}
if (tb[NETCONFA_MC_FORWARDING])
- fprintf(fp, "mc_forwarding %d ",
- *(int *)RTA_DATA(tb[NETCONFA_MC_FORWARDING]));
+ print_onoff(fp, "mc_forwarding",
+ rta_getattr_u32(tb[NETCONFA_MC_FORWARDING]));
if (tb[NETCONFA_PROXY_NEIGH])
- fprintf(fp, "proxy_neigh %s ",
- *(int *)RTA_DATA(tb[NETCONFA_PROXY_NEIGH])?"on":"off");
+ print_onoff(fp, "proxy_neigh",
+ rta_getattr_u32(tb[NETCONFA_PROXY_NEIGH]));
+
+ if (tb[NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN])
+ print_onoff(fp, "ignore_routes_with_linkdown",
+ rta_getattr_u32(tb[NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN]));
+
+ if (tb[NETCONFA_INPUT])
+ print_onoff(fp, "input", rta_getattr_u32(tb[NETCONFA_INPUT]));
fprintf(fp, "\n");
fflush(fp);
@@ -142,12 +166,14 @@ static int do_show(int argc, char **argv)
struct nlmsghdr n;
struct netconfmsg ncm;
char buf[1024];
- } req;
+ } req = {
+ .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct netconfmsg)),
+ .n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK,
+ .n.nlmsg_type = RTM_GETNETCONF,
+ };
ipnetconf_reset_filter(0);
filter.family = preferred_family;
- if (filter.family == AF_UNSPEC)
- filter.family = AF_INET;
while (argc > 0) {
if (strcmp(*argv, "dev") == 0) {
@@ -163,15 +189,11 @@ static int do_show(int argc, char **argv)
}
ll_init_map(&rth);
- if (filter.ifindex) {
- memset(&req, 0, sizeof(req));
- req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct netconfmsg));
- req.n.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK;
- req.n.nlmsg_type = RTM_GETNETCONF;
+
+ if (filter.ifindex && filter.family != AF_UNSPEC) {
req.ncm.ncm_family = filter.family;
- if (filter.ifindex)
- addattr_l(&req.n, sizeof(req), NETCONFA_IFINDEX,
- &filter.ifindex, sizeof(filter.ifindex));
+ addattr_l(&req.n, sizeof(req), NETCONFA_IFINDEX,
+ &filter.ifindex, sizeof(filter.ifindex));
if (rtnl_send(&rth, &req.n, req.n.nlmsg_len) < 0) {
perror("Can not send request");
@@ -179,16 +201,26 @@ static int do_show(int argc, char **argv)
}
rtnl_listen(&rth, print_netconf, stdout);
} else {
+ rth.flags = RTNL_HANDLE_F_SUPPRESS_NLERR;
dump:
if (rtnl_wilddump_request(&rth, filter.family, RTM_GETNETCONF) < 0) {
perror("Cannot send dump request");
exit(1);
}
if (rtnl_dump_filter(&rth, print_netconf2, stdout) < 0) {
+ /* kernel does not support netconf dump on AF_UNSPEC;
+ * fall back to requesting by family
+ */
+ if (errno == EOPNOTSUPP &&
+ filter.family == AF_UNSPEC) {
+ filter.family = AF_INET;
+ goto dump;
+ }
+ perror("RTNETLINK answers");
fprintf(stderr, "Dump terminated\n");
exit(1);
}
- if (preferred_family == AF_UNSPEC) {
+ if (preferred_family == AF_UNSPEC && filter.family == AF_INET) {
preferred_family = AF_INET6;
filter.family = AF_INET6;
goto dump;
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-29 06:28:45 +0000