[ovs-dev] [PATCH] netdev-bsd: implement netdev_arp_lookup for NetBSD
yamt at mwd.biglobe.ne.jp
yamt at mwd.biglobe.ne.jp
Tue Aug 13 20:57:41 UTC 2013
From: YAMAMOTO Takashi <yamt at mwd.biglobe.ne.jp>
Signed-off-by: YAMAMOTO Takashi <yamt at mwd.biglobe.ne.jp>
---
lib/netdev-bsd.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 61 insertions(+), 2 deletions(-)
diff --git a/lib/netdev-bsd.c b/lib/netdev-bsd.c
index 50fb520..180ce7f 100644
--- a/lib/netdev-bsd.c
+++ b/lib/netdev-bsd.c
@@ -42,6 +42,8 @@
#include <sys/sysctl.h>
#if defined(__NetBSD__)
#include <net/route.h>
+#include <netinet/in.h>
+#include <netinet/if_inarp.h>
#endif
#include "rtbsd.h"
@@ -1332,6 +1334,63 @@ netdev_bsd_get_next_hop(const struct in_addr *host OVS_UNUSED,
#endif
}
+static int
+netdev_bsd_arp_lookup(const struct netdev *netdev OVS_UNUSED,
+ ovs_be32 ip OVS_UNUSED,
+ uint8_t mac[ETH_ADDR_LEN] OVS_UNUSED)
+{
+#if defined(__NetBSD__)
+ const struct rt_msghdr *rtm;
+ size_t needed;
+ char *buf;
+ const char *cp;
+ const char *ep;
+ int mib[6];
+ int error;
+
+ buf = NULL;
+ mib[0] = CTL_NET;
+ mib[1] = PF_ROUTE;
+ mib[2] = 0;
+ mib[3] = AF_INET;
+ mib[4] = NET_RT_FLAGS;
+ mib[5] = RTF_LLINFO;
+ if (sysctl(mib, 6, NULL, &needed, NULL, 0) == -1) {
+ error = errno;
+ goto error;
+ }
+ buf = xmalloc(needed);
+ if (sysctl(mib, 6, buf, &needed, NULL, 0) == -1) {
+ error = errno;
+ goto error;
+ }
+ ep = buf + needed;
+ for (cp = buf; cp < ep; cp += rtm->rtm_msglen) {
+ const struct sockaddr_inarp *sina;
+ const struct sockaddr_dl *sdl;
+
+ rtm = (const void *)cp;
+ sina = (const void *)(rtm + 1);
+ if (ip != sina->sin_addr.s_addr) {
+ continue;
+ }
+ sdl = (const void *)
+ ((const char *)(const void *)sina + RT_ROUNDUP(sina->sin_len));
+ if (sdl->sdl_alen == ETH_ADDR_LEN) {
+ memcpy(mac, &sdl->sdl_data[sdl->sdl_nlen], ETH_ADDR_LEN);
+ error = 0;
+ goto error;
+ }
+ }
+ error = ENXIO;
+error:
+ free(buf);
+ return error;
+#else
+ return EOPNOTSUPP;
+#endif
+}
+
static void
make_in4_sockaddr(struct sockaddr *sa, struct in_addr addr)
{
@@ -1460,7 +1519,7 @@ const struct netdev_class netdev_bsd_class = {
NULL, /* add_router */
netdev_bsd_get_next_hop,
NULL, /* get_status */
- NULL, /* arp_lookup */
+ netdev_bsd_arp_lookup, /* arp_lookup */
netdev_bsd_update_flags,
@@ -1523,7 +1582,7 @@ const struct netdev_class netdev_tap_class = {
NULL, /* add_router */
netdev_bsd_get_next_hop,
NULL, /* get_status */
- NULL, /* arp_lookup */
+ netdev_bsd_arp_lookup, /* arp_lookup */
netdev_bsd_update_flags,
--
1.8.3.1
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