From: Vadim Kochan <vadi...@gmail.com>
Dump RTnetlink interface related info with attributes.
Signed-off-by: Vadim Kochan <vadi...@gmail.com>
---
netsniff-ng/Makefile | 2 +
proto_nlmsg.c | 232 +++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 234 insertions(+)
diff --git a/netsniff-ng/Makefile b/netsniff-ng/Makefile
index 9fe2ffe..92990ff 100644
--- a/netsniff-ng/Makefile
+++ b/netsniff-ng/Makefile
@@ -1,5 +1,6 @@
netsniff-ng-libs = $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH)
$(PKG_CONFIG) --libs libnl-3.0) \
$(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH)
$(PKG_CONFIG) --libs libnl-genl-3.0) \
+ $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH)
$(PKG_CONFIG) --libs libnl-route-3.0) \
-lpthread
ifeq ($(CONFIG_LIBPCAP), 1)
@@ -78,6 +79,7 @@ endif
netsniff-ng-eflags = $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKG_CONFIG)
--cflags libnl-3.0) \
$(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKG_CONFIG)
--cflags libnl-genl-3.0) \
+ $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKG_CONFIG)
--cflags libnl-route-3.0) \
-DNEED_TCPDUMP_LIKE_FILTER
netsniff-ng-confs = ether.conf \
diff --git a/proto_nlmsg.c b/proto_nlmsg.c
index 1b0eed7..c482df1 100644
--- a/proto_nlmsg.c
+++ b/proto_nlmsg.c
@@ -9,6 +9,9 @@
#include <limits.h>
#include <libgen.h>
#include <netlink/msg.h>
+#include <netlink/route/link.h>
+#include <linux/if_arp.h>
+#include <arpa/inet.h>
#include "pkt_buff.h"
#include "proto.h"
@@ -120,6 +123,114 @@ static const char *nlmsg_rtnl_type2str(uint16_t type)
}
}
+static char *if_type2str(uint16_t type)
+{
+ switch (type) {
+ case ARPHRD_ETHER: return "ether";
+ case ARPHRD_EETHER: return "eether";
+ case ARPHRD_AX25: return "ax25";
+ case ARPHRD_PRONET: return "pronet";
+ case ARPHRD_CHAOS: return "chaos";
+ case ARPHRD_IEEE802: return "ieee802";
+ case ARPHRD_ARCNET: return "arcnet";
+ case ARPHRD_APPLETLK: return "appletlk";
+ case ARPHRD_DLCI: return "dlci";
+ case ARPHRD_ATM: return "atm";
+ case ARPHRD_METRICOM: return "metricom";
+ case ARPHRD_IEEE1394: return "ieee1394";
+ case ARPHRD_INFINIBAND: return "infiniband";
+ case ARPHRD_SLIP: return "slip";
+ case ARPHRD_CSLIP: return "cslip";
+ case ARPHRD_SLIP6: return "slip6";
+ case ARPHRD_CSLIP6: return "cslip6";
+ case ARPHRD_RSRVD: return "RSRVD";
+ case ARPHRD_ADAPT: return "adapt";
+ case ARPHRD_ROSE: return "rose";
+ case ARPHRD_X25: return "x25";
+ case ARPHRD_HWX25: return "hwx25";
+ case ARPHRD_CAN: return "can";
+ case ARPHRD_PPP: return "ppp";
+ case ARPHRD_HDLC: return "hdlc";
+ case ARPHRD_LAPB: return "lapb";
+ case ARPHRD_DDCMP: return "ddcmp";
+ case ARPHRD_RAWHDLC: return "rawhdlc";
+ case ARPHRD_TUNNEL: return "tunnel";
+ case ARPHRD_TUNNEL6: return "tunnel6";
+ case ARPHRD_FRAD: return "frad";
+ case ARPHRD_SKIP: return "skip";
+ case ARPHRD_LOOPBACK: return "loopback";
+ case ARPHRD_LOCALTLK: return "localtlk";
+ case ARPHRD_FDDI: return "fddi";
+ case ARPHRD_BIF: return "bif";
+ case ARPHRD_SIT: return "sit";
+ case ARPHRD_IPDDP: return "ipddp";
+ case ARPHRD_IPGRE: return "ipgre";
+ case ARPHRD_PIMREG: return "pimreg";
+ case ARPHRD_HIPPI: return "hippi";
+ case ARPHRD_ASH: return "ash";
+ case ARPHRD_ECONET: return "econet";
+ case ARPHRD_IRDA: return "irda";
+ case ARPHRD_FCPP: return "fcpp";
+ case ARPHRD_FCAL: return "fcal";
+ case ARPHRD_FCPL: return "fcpl";
+ case ARPHRD_FCFABRIC: return "fcfb0";
+ case ARPHRD_FCFABRIC + 1: return "fcfb1";
+ case ARPHRD_FCFABRIC + 2: return "fcfb2";
+ case ARPHRD_FCFABRIC + 3: return "fcfb3";
+ case ARPHRD_FCFABRIC + 4: return "fcfb4";
+ case ARPHRD_FCFABRIC + 5: return "fcfb5";
+ case ARPHRD_FCFABRIC + 6: return "fcfb6";
+ case ARPHRD_FCFABRIC + 7: return "fcfb7";
+ case ARPHRD_FCFABRIC + 8: return "fcfb8";
+ case ARPHRD_FCFABRIC + 9: return "fcfb9";
+ case ARPHRD_FCFABRIC + 10: return "fcfb10";
+ case ARPHRD_FCFABRIC + 11: return "fcfb11";
+ case ARPHRD_FCFABRIC + 12: return "fcfb12";
+ case ARPHRD_IEEE802_TR: return "ieee802_tr";
+ case ARPHRD_IEEE80211: return "ieee80211";
+ case ARPHRD_IEEE80211_PRISM: return "ieee80211_prism";
+ case ARPHRD_IEEE80211_RADIOTAP: return "ieee80211_radiotap";
+ case ARPHRD_IEEE802154: return "ieee802154";
+ case ARPHRD_PHONET: return "phonet";
+ case ARPHRD_PHONET_PIPE: return "phonet_pipe";
+ case ARPHRD_CAIF: return "caif";
+ case ARPHRD_IP6GRE: return "ip6gre";
+ case ARPHRD_NETLINK: return "netlink";
+ case ARPHRD_NONE: return "none";
+ case ARPHRD_VOID: return "void";
+
+ default: return "Unknown";
+ }
+}
+
+static const char *if_addr2str(const unsigned char *addr, int alen, int type,
+ char *buf, int blen)
+{
+ int i;
+ int l;
+
+ if (alen == 4 &&
+ (type == ARPHRD_TUNNEL || type == ARPHRD_SIT || type ==
ARPHRD_IPGRE)) {
+ return inet_ntop(AF_INET, addr, buf, blen);
+ }
+ if (alen == 16 && type == ARPHRD_TUNNEL6) {
+ return inet_ntop(AF_INET6, addr, buf, blen);
+ }
+ l = 0;
+ for (i=0; i<alen; i++) {
+ if (i==0) {
+ snprintf(buf+l, blen, "%02x", addr[i]);
+ blen -= 2;
+ l += 2;
+ } else {
+ snprintf(buf+l, blen, ":%02x", addr[i]);
+ blen -= 3;
+ l += 3;
+ }
+ }
+ return buf;
+}
+
static char *nlmsg_type2str(uint16_t proto, uint16_t type, char *buf, int len)
{
if (proto == NETLINK_ROUTE && type < RTM_MAX) {
@@ -133,6 +244,124 @@ static char *nlmsg_type2str(uint16_t proto, uint16_t
type, char *buf, int len)
return nl_nlmsgtype2str(type, buf, len);
}
+static void rtnl_print_ifinfo(struct nlmsghdr *hdr)
+{
+ struct ifinfomsg *ifi = NLMSG_DATA(hdr);
+ struct rtattr *attr = IFLA_RTA(ifi);
+ uint32_t attrs_len = IFLA_PAYLOAD(hdr);
+ char flags[256];
+ char if_addr[64] = {};
+ char *af_link = "Unknown";
+
+ if (ifi->ifi_family == 0)
+ af_link = "unspec";
+ else if (ifi->ifi_family == AF_BRIDGE)
+ af_link = "bridge";
+
+ tprintf(" [ Link Family %d (%s%s%s)", ifi->ifi_family,
+ colorize_start(bold), af_link, colorize_end());
+ tprintf(", Type %d (%s%s%s)", ifi->ifi_type,
+ colorize_start(bold),
+ if_type2str(ifi->ifi_type),
+ colorize_end());
+ tprintf(", Index %d", ifi->ifi_index);
+ tprintf(", Flags 0x%x (%s%s%s)", ifi->ifi_flags,
+ colorize_start(bold),
+ rtnl_link_flags2str(ifi->ifi_flags, flags,
+ sizeof(flags)),
+ colorize_end());
+ tprintf(", Change 0x%x (%s%s%s) ]\n", ifi->ifi_change,
+ colorize_start(bold),
+ rtnl_link_flags2str(ifi->ifi_change, flags,
+ sizeof(flags)),
+ colorize_end());
+
+ for (; RTA_OK(attr, attrs_len); attr = RTA_NEXT(attr, attrs_len)) {
+ switch (attr->rta_type) {
+ case IFLA_ADDRESS:
+ tprintf("\tA: Address %s\n",
+ if_addr2str(RTA_DATA(attr),
+ RTA_PAYLOAD(attr),
+ ifi->ifi_type, if_addr,
+ sizeof(if_addr)));
+ break;
+ case IFLA_BROADCAST:
+ tprintf("\tA: Broadcast %s\n",
+ if_addr2str(RTA_DATA(attr),
+ RTA_PAYLOAD(attr),
+ ifi->ifi_type, if_addr,
+ sizeof(if_addr)));
+ break;
+ case IFLA_IFNAME:
+ tprintf("\tA: Name %s%s%s\n",
+ colorize_start(bold),
+ (char *)(RTA_DATA(attr)),
+ colorize_end());
+ break;
+ case IFLA_MTU:
+ tprintf("\tA: MTU %d\n", *(int *)(RTA_DATA(attr)));
+ break;
+ case IFLA_LINK:
+ tprintf("\tA: Link %d\n", *(int *)(RTA_DATA(attr)));
+ break;
+ case IFLA_QDISC:
+ tprintf("\tA: QDisc %s\n", (char *)(RTA_DATA(attr)));
+ break;
+ case IFLA_OPERSTATE:
+ {
+ uint8_t st = *(uint8_t *)(RTA_DATA(attr));
+ char states[256];
+
+ tprintf("\tA: Operation state 0x%x (%s%s%s)\n",
+ st,
+ colorize_start(bold),
+ rtnl_link_operstate2str(st,
+ states, sizeof(states)),
+ colorize_end());
+ }
+ break;
+ case IFLA_LINKMODE:
+ {
+ uint8_t mode = *(uint8_t *)(RTA_DATA(attr));
+ char str[32];
+
+ tprintf("\tA: Mode 0x%x (%s%s%s)\n", mode,
+ colorize_start(bold),
+ rtnl_link_mode2str(mode, str,
+ sizeof(str)),
+ colorize_end());
+ }
+ break;
+ case IFLA_GROUP:
+ tprintf("\tA: Group %d\n", *(int *)(RTA_DATA(attr)));
+ break;
+ case IFLA_TXQLEN:
+ tprintf("\tA: Tx queue len %d\n",
+ *(int *)(RTA_DATA(attr)));
+ break;
+ case IFLA_NET_NS_PID:
+ tprintf("\tA: Network namespace pid %d\n",
+ *(int *)(RTA_DATA(attr)));
+ break;
+ case IFLA_NET_NS_FD:
+ tprintf("\tA: Network namespace fd %d\n",
+ *(int *)(RTA_DATA(attr)));
+ break;
+ }
+ }
+}
+
+static void rtnl_msg_print(struct nlmsghdr *hdr)
+{
+ switch (hdr->nlmsg_type) {
+ case RTM_NEWLINK:
+ case RTM_DELLINK:
+ case RTM_GETLINK:
+ case RTM_SETLINK:
+ rtnl_print_ifinfo(hdr);
+ }
+}
+
static void nlmsg_print(uint16_t family, struct nlmsghdr *hdr)
{
char type[32];
@@ -178,6 +407,9 @@ static void nlmsg_print(uint16_t family, struct nlmsghdr
*hdr)
tprintf(" (%s%s%s)", colorize_start(bold), basename(procname),
colorize_end());
tprintf(" ]\n");
+
+ if (family == NETLINK_ROUTE)
+ rtnl_msg_print(hdr);
}
static void nlmsg(struct pkt_buff *pkt)
--
2.3.1
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