Signed-off-by: Linus Lüssing <linus.luess...@c0d3.blue>
---
debug.c | 1 +
netlink.c | 101 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
netlink.h | 2 ++
3 files changed, 104 insertions(+)
diff --git a/debug.c b/debug.c
index a7c5adf..5f9a87b 100644
--- a/debug.c
+++ b/debug.c
@@ -87,6 +87,7 @@ const struct debug_table_data
batctl_debug_tables[BATCTL_TABLE_NUM] = {
.opt_short = "dc",
.debugfs_name = "dat_cache",
.header_lines = 2,
+ .netlink_fn = netlink_print_dat_cache,
},
{
.opt_long = "nc_nodes",
diff --git a/netlink.c b/netlink.c
index 126066b..8069fbd 100644
--- a/netlink.c
+++ b/netlink.c
@@ -118,6 +118,11 @@ struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] =
{
.minlen = ETH_ALEN,
.maxlen = ETH_ALEN },
[BATADV_ATTR_BLA_CRC] = { .type = NLA_U16 },
+ [BATADV_ATTR_DC_ADDRESS] = { .type = NLA_U32 },
+ [BATADV_ATTR_DC_HWADDRESS] = { .type = NLA_UNSPEC,
+ .minlen = ETH_ALEN,
+ .maxlen = ETH_ALEN },
+ [BATADV_ATTR_DC_VID] = { .type = NLA_U16 },
};
static int last_err;
@@ -1104,6 +1109,80 @@ static int bla_backbone_callback(struct nl_msg *msg,
void *arg)
return NL_OK;
}
+static const int dat_cache_mandatory[] = {
+ BATADV_ATTR_DC_ADDRESS,
+ BATADV_ATTR_DC_HWADDRESS,
+ BATADV_ATTR_DC_VID,
+ BATADV_ATTR_LAST_SEEN_MSECS,
+};
+
+static int dat_cache_callback(struct nl_msg *msg, void *arg)
+{
+ int last_seen_msecs, last_seen_secs, last_seen_mins;
+ struct nlattr *attrs[BATADV_ATTR_MAX+1];
+ struct nlmsghdr *nlh = nlmsg_hdr(msg);
+ struct print_opts *opts = arg;
+ struct bat_host *bat_host;
+ struct genlmsghdr *ghdr;
+ struct in_addr in_addr;
+ uint8_t *hwaddr;
+ int16_t vid;
+ char *addr;
+
+ if (!genlmsg_valid_hdr(nlh, 0)) {
+ fputs("Received invalid data from kernel.\n", stderr);
+ exit(1);
+ }
+
+ ghdr = nlmsg_data(nlh);
+
+ if (ghdr->cmd != BATADV_CMD_GET_DAT_CACHE)
+ return NL_OK;
+
+ if (nla_parse(attrs, BATADV_ATTR_MAX, genlmsg_attrdata(ghdr, 0),
+ genlmsg_len(ghdr), batadv_netlink_policy)) {
+ fputs("Received invalid data from kernel.\n", stderr);
+ exit(1);
+ }
+
+ if (missing_mandatory_attrs(attrs, dat_cache_mandatory,
+ ARRAY_SIZE(dat_cache_mandatory))) {
+ fputs("Missing attributes from kernel\n", stderr);
+ exit(1);
+ }
+
+ in_addr.s_addr = nla_get_u32(attrs[BATADV_ATTR_DC_ADDRESS]);
+ addr = inet_ntoa(in_addr);
+ hwaddr = nla_data(attrs[BATADV_ATTR_DC_HWADDRESS]);
+ vid = nla_get_u16(attrs[BATADV_ATTR_DC_VID]);
+
+ last_seen_msecs = nla_get_u32(attrs[BATADV_ATTR_LAST_SEEN_MSECS]);
+ last_seen_mins = last_seen_msecs / 60000;
+ last_seen_msecs = last_seen_msecs % 60000;
+ last_seen_secs = last_seen_msecs / 1000;
+
+ if (opts->read_opt & MULTICAST_ONLY && !(addr[0] & 0x01))
+ return NL_OK;
+
+ if (opts->read_opt & UNICAST_ONLY && (addr[0] & 0x01))
+ return NL_OK;
+
+ printf(" * %15s ", addr);
+
+ bat_host = bat_hosts_find_by_mac((char *)hwaddr);
+ if (!(opts->read_opt & USE_BAT_HOSTS) || !bat_host)
+ printf("%02x:%02x:%02x:%02x:%02x:%02x ",
+ hwaddr[0], hwaddr[1], hwaddr[2],
+ hwaddr[3], hwaddr[4], hwaddr[5]);
+ else
+ printf("%17s ", bat_host->name);
+
+ printf("%4i %6i:%02i\n",
+ BATADV_PRINT_VID(vid), last_seen_mins, last_seen_secs);
+
+ return NL_OK;
+}
+
static int netlink_print_common(char *mesh_iface, char *orig_iface,
int read_opt, float orig_timeout,
float watch_interval, const char *header,
@@ -1336,6 +1415,28 @@ int netlink_print_bla_backbone(char *mesh_iface, char
*orig_iface, int read_opts
bla_backbone_callback);
}
+int netlink_print_dat_cache(char *mesh_iface, char *orig_iface, int read_opts,
+ float orig_timeout, float watch_interval)
+{
+ char *header;
+ int ret;
+
+ ret = asprintf(&header, "Distributed ARP Table (%s):\n%s\n",
+ mesh_iface,
+ " IPv4 MAC VID last-seen");
+
+ if (ret < 0)
+ return ret;
+
+ ret = netlink_print_common(mesh_iface, orig_iface, read_opts,
+ orig_timeout, watch_interval, header,
+ BATADV_CMD_GET_DAT_CACHE,
+ dat_cache_callback);
+
+ free(header);
+ return ret;
+}
+
static int nlquery_error_cb(struct sockaddr_nl *nla __maybe_unused,
struct nlmsgerr *nlerr, void *arg)
{
diff --git a/netlink.h b/netlink.h
index a75e5cf..57870c2 100644
--- a/netlink.h
+++ b/netlink.h
@@ -45,6 +45,8 @@ int netlink_print_bla_claim(char *mesh_iface, char
*orig_iface, int read_opt,
float orig_timeout, float watch_interval);
int netlink_print_bla_backbone(char *mesh_iface, char *orig_iface, int
read_opt,
float orig_timeout, float watch_interval);
+int netlink_print_dat_cache(char *mesh_iface, char *orig_iface, int read_opt,
+ float orig_timeout, float watch_interval);
int translate_mac_netlink(const char *mesh_iface, const struct ether_addr *mac,
struct ether_addr *mac_out);
--
2.11.0
