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/*
* netsniff-ng - the packet sniffing beast
* Copyright 2014 Tobias Klauser.
* Subject to the GPL, version 2.
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <libgen.h>
#include <netlink/msg.h>
#include <netlink/route/link.h>
#include <netlink/route/addr.h>
#include <arpa/inet.h>
#include "dev.h"
#include "pkt_buff.h"
#include "proc.h"
#include "proto.h"
#include "protos.h"
#include "timer.h"
#define INFINITY 0xFFFFFFFFU
#define RTA_LEN(attr) ((int)RTA_PAYLOAD(attr))
#define RTA_INT(attr) (*(int *)RTA_DATA(attr))
#define RTA_UINT(attr) (*(unsigned int *)RTA_DATA(attr))
#define RTA_UINT8(attr) (*(uint8_t *)RTA_DATA(attr))
#define RTA_UINT32(attr) (*(uint32_t *)RTA_DATA(attr))
#define RTA_STR(attr) ((char *)RTA_DATA(attr))
#ifndef NDA_RTA
#define NDA_RTA(r) \
((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
#endif
#ifndef NDA_PAYLOAD
#define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
#endif
#ifndef NLA_LENGTH
#define NLA_LENGTH(len) (NLA_ALIGN(sizeof(struct nlattr)) + (len))
#endif
#ifndef NLA_DATA
#define NLA_DATA(nla) ((void*)(((char*)(nla)) + NLA_LENGTH(0)))
#endif
#ifndef NLA_PAYLOAD
#define NLA_PAYLOAD(nla) ((int)((nla)->nla_len) - NLA_LENGTH(0))
#endif
#define NLA_LEN(attr) ((int)NLA_PAYLOAD(attr))
#define NLA_INT(attr) (*(int *)NLA_DATA(attr))
#define NLA_UINT(attr) (*(unsigned int *)NLA_DATA(attr))
#define NLA_UINT8(attr) (*(uint8_t *)NLA_DATA(attr))
#define NLA_UINT16(attr) (*(uint16_t *)NLA_DATA(attr))
#define NLA_UINT32(attr) (*(uint32_t *)NLA_DATA(attr))
#define NLA_STR(attr) ((char *)NLA_DATA(attr))
#ifndef GEN_NLA
#define GEN_NLA(n) ((struct nlattr*)(((char*)(n)) + GENL_HDRLEN))
#endif
#ifndef NLA_OK
#define NLA_OK(nla,len) \
((len) >= (int)sizeof(struct nlattr) && \
(nla)->nla_len >= sizeof(struct nlattr) && \
(nla)->nla_len <= (len))
#endif
#ifndef NLA_NEXT
#define NLA_NEXT(nla,attrlen) \
((attrlen) -= NLA_ALIGN((nla)->nla_len), \
(struct nlattr*)(((char*)(nla)) + NLA_ALIGN((nla)->nla_len)))
#endif
#define rta_fmt(attr, fmt, ...) \
tprintf("\tA: "fmt, ##__VA_ARGS__); \
tprintf(", Len %d\n", RTA_LEN(attr));
#define nla_fmt(attr, fmt, ...) \
tprintf("\tA: "fmt, ##__VA_ARGS__); \
tprintf(", Len %d\n", NLA_LEN(attr));
#define nla_fmt_nested(attr, fmt, ...) \
tprintf("[ "fmt, ##__VA_ARGS__); \
tprintf(", Len %d] ", NLA_LEN(attr));
#define nla_fmt_nested_start(attr, fmt, ...) \
tprintf("\t A: "fmt, ##__VA_ARGS__); \
tprintf(", Len %d ", NLA_LEN(attr));
#define nla_fmt_nested_end() tprintf("\n")
struct flag_name {
const char *name;
unsigned int flag;
};
static const char *flags2str(struct flag_name *tbl, unsigned int flags,
char *buf, int len)
{
int bits_stay = flags;
memset(buf, 0, len);
for (; tbl && tbl->name; tbl++) {
if (!(tbl->flag & flags))
continue;
bits_stay &= ~tbl->flag;
strncat(buf, tbl->name, len - strlen(buf) - 1);
if (bits_stay & flags)
strncat(buf, ",", len - strlen(buf) - 1);
}
return buf;
}
static void nlmsg_print_raw(struct nlmsghdr *hdr)
{
u32 len = hdr->nlmsg_len;
if (len) {
_ascii((uint8_t *) hdr + NLMSG_HDRLEN, len - NLMSG_HDRLEN);
_hex((uint8_t *) hdr + NLMSG_HDRLEN, len - NLMSG_HDRLEN);
}
}
static const char *nlmsg_family2str(uint16_t family)
{
switch (family) {
case NETLINK_ROUTE: return "routing";
case NETLINK_UNUSED: return "unused";
case NETLINK_USERSOCK: return "user-mode socket";
case NETLINK_FIREWALL: return "unused, formerly ip_queue";
/* NETLINK_INET_DIAG was renamed to NETLINK_SOCK_DIAG in Linux kernel 3.10 */
#if defined(NETLINK_SOCK_DIAG)
case NETLINK_SOCK_DIAG: return "socket monitoring";
#elif defined(NETLINK_INET_DIAG)
case NETLINK_INET_DIAG: return "INET socket monitoring";
#endif
case NETLINK_NFLOG: return "netfilter ULOG";
case NETLINK_XFRM: return "IPsec";
case NETLINK_SELINUX: return "SELinux event notification";
case NETLINK_ISCSI: return "Open-iSCSI";
case NETLINK_AUDIT: return "auditing";
case NETLINK_FIB_LOOKUP: return "FIB lookup";
case NETLINK_CONNECTOR: return "Kernel connector";
case NETLINK_NETFILTER: return "Netfilter";
case NETLINK_IP6_FW: return "unused, formerly ip6_queue";
case NETLINK_DNRTMSG: return "DECnet routing";
case NETLINK_KOBJECT_UEVENT: return "Kernel messages";
case NETLINK_GENERIC: return "Generic";
case NETLINK_SCSITRANSPORT: return "SCSI transports";
case NETLINK_ECRYPTFS: return "ecryptfs";
case NETLINK_RDMA: return "RDMA";
#if defined(NETLINK_CRYPTO)
case NETLINK_CRYPTO: return "Crypto layer";
#endif
default: return "Unknown";
}
}
static const char *nlmsg_rtnl_type2str(uint16_t type)
{
switch (type) {
case RTM_NEWLINK: return "new link";
case RTM_DELLINK: return "del link";
case RTM_GETLINK: return "get link";
case RTM_SETLINK: return "set link";
case RTM_NEWADDR: return "new addr";
case RTM_DELADDR: return "del addr";
case RTM_GETADDR: return "get addr";
case RTM_NEWROUTE: return "new route";
case RTM_DELROUTE: return "del route";
case RTM_GETROUTE: return "get route";
case RTM_NEWNEIGH: return "new neigh";
case RTM_DELNEIGH: return "del neigh";
case RTM_GETNEIGH: return "get neigh";
case RTM_NEWRULE: return "new rule";
case RTM_DELRULE: return "del rule";
case RTM_GETRULE: return "get rule";
case RTM_NEWQDISC: return "new tc qdisc";
case RTM_DELQDISC: return "del tc qdisc";
case RTM_GETQDISC: return "get tc qdisc";
case RTM_NEWTCLASS: return "new tc class";
case RTM_DELTCLASS: return "del tc class";
case RTM_GETTCLASS: return "get tc class";
case RTM_NEWTFILTER: return "new tc filter";
case RTM_DELTFILTER: return "del tc filter";
case RTM_GETTFILTER: return "get tc filter";
case RTM_NEWACTION: return "new tc action";
case RTM_DELACTION: return "del tc action";
case RTM_GETACTION: return "get tc action";
case RTM_NEWPREFIX: return "new prefix";
case RTM_GETMULTICAST: return "get mcast addr";
case RTM_GETANYCAST: return "get anycast addr";
case RTM_NEWNEIGHTBL: return "new neigh table";
case RTM_GETNEIGHTBL: return "get neigh table";
case RTM_SETNEIGHTBL: return "set neigh table";
case RTM_NEWNDUSEROPT: return "new ndisc user option";
case RTM_NEWADDRLABEL: return "new addr label";
case RTM_DELADDRLABEL: return "del addr label";
case RTM_GETADDRLABEL: return "get addr label";
case RTM_GETDCB: return "get data-center-bridge";
case RTM_SETDCB: return "set data-center-bridge";
#if defined(RTM_NEWNETCONF)
case RTM_NEWNETCONF: return "new netconf";
case RTM_GETNETCONF: return "get netconf";
#endif
#if defined(RTM_NEWMDB)
case RTM_NEWMDB: return "new bridge mdb";
case RTM_DELMDB: return "del bridge mdb";
case RTM_GETMDB: return "get bridge mdb";
#endif
default: return NULL;
}
}
static const char *nlmsg_genl_type2str(uint16_t type)
{
switch (type) {
case GENL_ID_CTRL: return "nlctrl";
#if defined(GENL_ID_PCMRAID)
case GENL_ID_PCMRAID: return "pcmraid";
#endif
#if defined(GENL_ID_VFS_DQUOT)
case GENL_ID_VFS_DQUOT: return "vfs dquot";
#endif
/* only dynamic family IDs should be used starting with Linux 4.10 */
default: return "dynamic";
}
}
static char *nlmsg_type2str(uint16_t proto, uint16_t type, char *buf, int len)
{
const char *name = NULL;
if (proto == NETLINK_ROUTE && type < RTM_MAX)
name = nlmsg_rtnl_type2str(type);
else if (proto == NETLINK_GENERIC)
name = nlmsg_genl_type2str(type);
if (name) {
strncpy(buf, name, len);
return buf;
}
return nl_nlmsgtype2str(type, buf, len);
}
static const char *addr_family2str(uint16_t family)
{
switch (family) {
case AF_INET: return "ipv4";
case AF_INET6: return "ipv6";
case AF_DECnet: return "decnet";
case AF_IPX: return "ipx";
default: return "Unknown";
}
}
static const char *addr2str(uint16_t af, const void *addr, char *buf, int blen)
{
if (af == AF_INET || af == AF_INET6)
return inet_ntop(af, addr, buf, blen);
return "???";
}
static const char *scope2str(uint8_t scope)
{
switch (scope) {
case RT_SCOPE_UNIVERSE: return "global";
case RT_SCOPE_LINK: return "link";
case RT_SCOPE_HOST: return "host";
case RT_SCOPE_NOWHERE: return "nowhere";
default: return "Unknown";
}
}
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 (hdr->nlmsg_len < NLMSG_LENGTH(sizeof(*ifi)))
return;
if (ifi->ifi_family == AF_UNSPEC)
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),
device_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:
rta_fmt(attr, "Address %s",
device_addr2str(RTA_DATA(attr),
RTA_LEN(attr), ifi->ifi_type,
if_addr, sizeof(if_addr)));
break;
case IFLA_BROADCAST:
rta_fmt(attr, "Broadcast %s",
device_addr2str(RTA_DATA(attr),
RTA_LEN(attr), ifi->ifi_type,
if_addr, sizeof(if_addr)));
break;
case IFLA_IFNAME:
rta_fmt(attr, "Name %s%s%s",
colorize_start(bold), RTA_STR(attr),
colorize_end());
break;
case IFLA_MTU:
rta_fmt(attr, "MTU %d", RTA_INT(attr));
break;
case IFLA_LINK:
rta_fmt(attr, "Link %d", RTA_INT(attr));
break;
case IFLA_QDISC:
rta_fmt(attr, "QDisc %s", RTA_STR(attr));
break;
case IFLA_OPERSTATE:
{
uint8_t st = RTA_UINT8(attr);
char states[256];
rta_fmt(attr, "Operation state 0x%x (%s%s%s)",
st,
colorize_start(bold),
rtnl_link_operstate2str(st,
states, sizeof(states)),
colorize_end());
}
break;
case IFLA_LINKMODE:
{
uint8_t mode = RTA_UINT8(attr);
char str[32];
rta_fmt(attr, "Mode 0x%x (%s%s%s)", mode,
colorize_start(bold),
rtnl_link_mode2str(mode, str,
sizeof(str)),
colorize_end());
}
break;
case IFLA_GROUP:
rta_fmt(attr, "Group %d", RTA_INT(attr));
break;
case IFLA_TXQLEN:
rta_fmt(attr, "Tx queue len %d", RTA_INT(attr));
break;
case IFLA_NET_NS_PID:
rta_fmt(attr, "Network namespace pid %d",
RTA_INT(attr));
break;
case IFLA_NET_NS_FD:
rta_fmt(attr, "Network namespace fd %d", RTA_INT(attr));
break;
default:
rta_fmt(attr, "0x%x", attr->rta_type);
break;
}
}
}
static void rtnl_print_ifaddr(struct nlmsghdr *hdr)
{
struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
uint32_t attrs_len = IFA_PAYLOAD(hdr);
struct rtattr *attr = IFA_RTA(ifa);
struct ifa_cacheinfo *ci;
char addr_str[256];
char flags[256];
if (hdr->nlmsg_len < NLMSG_LENGTH(sizeof(*ifa)))
return;
tprintf(" [ Address Family %d (%s%s%s)", ifa->ifa_family,
colorize_start(bold),
addr_family2str(ifa->ifa_family),
colorize_end());
tprintf(", Prefix Len %d", ifa->ifa_prefixlen);
tprintf(", Flags %d (%s%s%s)", ifa->ifa_flags,
colorize_start(bold),
rtnl_addr_flags2str(ifa->ifa_flags, flags,
sizeof(flags)),
colorize_end());
tprintf(", Scope %d (%s%s%s)", ifa->ifa_scope,
colorize_start(bold),
scope2str(ifa->ifa_scope),
colorize_end());
tprintf(", Link Index %d ]\n", ifa->ifa_index);
for (; RTA_OK(attr, attrs_len); attr = RTA_NEXT(attr, attrs_len)) {
switch (attr->rta_type) {
case IFA_LOCAL:
rta_fmt(attr, "Local %s", addr2str(ifa->ifa_family,
RTA_DATA(attr), addr_str, sizeof(addr_str)));
break;
case IFA_ADDRESS:
rta_fmt(attr, "Address %s", addr2str(ifa->ifa_family,
RTA_DATA(attr), addr_str, sizeof(addr_str)));
break;
case IFA_BROADCAST:
rta_fmt(attr, "Broadcast %s",
addr2str(ifa->ifa_family,
RTA_DATA(attr), addr_str,
sizeof(addr_str)));
break;
case IFA_MULTICAST:
rta_fmt(attr, "Multicast %s",
addr2str(ifa->ifa_family,
RTA_DATA(attr), addr_str,
sizeof(addr_str)));
break;
case IFA_ANYCAST:
rta_fmt(attr, "Anycast %s", addr2str(ifa->ifa_family,
RTA_DATA(attr), addr_str, sizeof(addr_str)));
break;
#ifdef IFA_FLAGS
case IFA_FLAGS:
rta_fmt(attr, "Flags %d (%s%s%s)", RTA_INT(attr),
colorize_start(bold),
rtnl_addr_flags2str(RTA_INT(attr),
flags, sizeof(flags)),
colorize_end());
break;
#endif
case IFA_LABEL:
rta_fmt(attr, "Label %s", RTA_STR(attr));
break;
case IFA_CACHEINFO:
ci = RTA_DATA(attr);
tprintf("\tA: Cache (");
if (ci->ifa_valid == INFINITY)
tprintf("valid lft(forever)");
else
tprintf("valid lft(%us)", ci->ifa_valid);
if (ci->ifa_prefered == INFINITY)
tprintf(", prefrd lft(forever)");
else
tprintf(", prefrd lft(%us)", ci->ifa_prefered);
tprintf(", created on(%.2fs)", (double)ci->cstamp / 100);
tprintf(", updated on(%.2fs))", (double)ci->cstamp / 100);
tprintf(", Len %d\n", RTA_LEN(attr));
break;
default:
rta_fmt(attr, "0x%x", attr->rta_type);
break;
}
}
}
static const char *route_table2str(uint8_t table)
{
switch (table) {
case RT_TABLE_UNSPEC: return "unspec";
case RT_TABLE_COMPAT: return "compat";
case RT_TABLE_DEFAULT: return "default";
case RT_TABLE_MAIN: return "main";
case RT_TABLE_LOCAL: return "local";
default: return "Unknown";
}
}
static const char *route_proto2str(uint8_t proto)
{
switch (proto) {
case RTPROT_UNSPEC: return "unspec";
case RTPROT_REDIRECT: return "redirect";
case RTPROT_KERNEL: return "kernel";
case RTPROT_BOOT: return "boot";
case RTPROT_STATIC: return "static";
case RTPROT_GATED: return "gated";
case RTPROT_RA: return "ra";
case RTPROT_MRT: return "mrt";
case RTPROT_ZEBRA: return "zebra";
case RTPROT_BIRD: return "bird";
case RTPROT_DNROUTED: return "DECnet";
case RTPROT_XORP: return "xorp";
case RTPROT_NTK: return "netsukuku";
case RTPROT_DHCP: return "dhcpc";
#ifdef RTPROT_MROUTED
case RTPROT_MROUTED: return "mrouted";
#endif
default: return "Unknown";
}
}
static const char *route_type2str(uint8_t type)
{
switch (type) {
case RTN_UNSPEC: return "unspec";
case RTN_UNICAST: return "unicast";
case RTN_LOCAL: return "local";
case RTN_BROADCAST: return "broadcast";
case RTN_ANYCAST: return "anycast";
case RTN_MULTICAST: return "multicast";
case RTN_BLACKHOLE: return "blackhole";
case RTN_UNREACHABLE: return "unreach";
case RTN_PROHIBIT: return "prohibit";
case RTN_THROW: return "throw";
case RTN_NAT: return "nat";
case RTN_XRESOLVE: return "xresolve";
default: return "Unknown";
}
}
static struct flag_name route_flags[] = {
{ "notify", RTM_F_NOTIFY },
{ "cloned", RTM_F_CLONED },
{ "equalize", RTM_F_EQUALIZE },
{ "prefix", RTM_F_PREFIX },
{ "dead", RTNH_F_DEAD },
{ "pervasive", RTNH_F_PERVASIVE },
{ "onlink", RTNH_F_ONLINK },
{ NULL, 0 },
};
static void rtnl_print_route(struct nlmsghdr *hdr)
{
struct rtmsg *rtm = NLMSG_DATA(hdr);
uint32_t attrs_len = RTM_PAYLOAD(hdr);
struct rtattr *attr = RTM_RTA(rtm);
struct rta_cacheinfo *ci;
int hz = get_user_hz();
char addr_str[256];
char flags[256];
if (hdr->nlmsg_len < NLMSG_LENGTH(sizeof(*rtm)))
return;
tprintf(" [ Route Family %d (%s%s%s)", rtm->rtm_family,
colorize_start(bold),
addr_family2str(rtm->rtm_family),
colorize_end());
tprintf(", Dst Len %d", rtm->rtm_dst_len);
tprintf(", Src Len %d", rtm->rtm_src_len);
tprintf(", ToS %d", rtm->rtm_tos);
tprintf(", Table %d (%s%s%s)", rtm->rtm_table,
colorize_start(bold),
route_table2str(rtm->rtm_table),
colorize_end());
tprintf(", Proto %d (%s%s%s)", rtm->rtm_protocol,
colorize_start(bold),
route_proto2str(rtm->rtm_protocol),
colorize_end());
tprintf(", Scope %d (%s%s%s)", rtm->rtm_scope,
colorize_start(bold),
scope2str(rtm->rtm_scope),
colorize_end());
tprintf(", Type %d (%s%s%s)", rtm->rtm_type,
colorize_start(bold),
route_type2str(rtm->rtm_type),
colorize_end());
tprintf(", Flags 0x%x (%s%s%s) ]\n", rtm->rtm_flags,
colorize_start(bold),
flags2str(route_flags, rtm->rtm_flags, flags,
sizeof(flags)),
colorize_end());
for (; RTA_OK(attr, attrs_len); attr = RTA_NEXT(attr, attrs_len)) {
switch (attr->rta_type) {
case RTA_DST:
rta_fmt(attr, "Dst %s", addr2str(rtm->rtm_family,
RTA_DATA(attr), addr_str, sizeof(addr_str)));
break;
case RTA_SRC:
rta_fmt(attr, "Src %s", addr2str(rtm->rtm_family,
RTA_DATA(attr), addr_str, sizeof(addr_str)));
break;
case RTA_IIF:
rta_fmt(attr, "Iif %d", RTA_INT(attr));
break;
case RTA_OIF:
rta_fmt(attr, "Oif %d", RTA_INT(attr));
break;
case RTA_GATEWAY:
rta_fmt(attr, "Gateway %s", addr2str(rtm->rtm_family,
RTA_DATA(attr), addr_str, sizeof(addr_str)));
break;
case RTA_PRIORITY:
rta_fmt(attr, "Priority %u", RTA_UINT32(attr));
break;
case RTA_PREFSRC:
rta_fmt(attr, "Pref Src %s", addr2str(rtm->rtm_family,
RTA_DATA(attr), addr_str, sizeof(addr_str)));
break;
#if defined(RTA_MARK)
case RTA_MARK:
rta_fmt(attr, "Mark 0x%x", RTA_UINT(attr));
break;
#endif
case RTA_FLOW:
rta_fmt(attr, "Flow 0x%x", RTA_UINT(attr));
break;
case RTA_TABLE:
rta_fmt(attr, "Table %d (%s%s%s)", RTA_UINT32(attr),
colorize_start(bold),
route_table2str(RTA_UINT32(attr)),
colorize_end());
break;
case RTA_CACHEINFO:
ci = RTA_DATA(attr);
tprintf("\tA: Cache (");
tprintf("expires(%ds)", ci->rta_expires / hz);
tprintf(", error(%d)", ci->rta_error);
tprintf(", users(%d)", ci->rta_clntref);
tprintf(", used(%d)", ci->rta_used);
tprintf(", last use(%ds)", ci->rta_lastuse / hz);
tprintf(", id(%d)", ci->rta_id);
tprintf(", ts(%d)", ci->rta_ts);
tprintf(", ts age(%ds))", ci->rta_tsage);
tprintf(", Len %d\n", RTA_LEN(attr));
break;
default:
rta_fmt(attr, "0x%x", attr->rta_type);
break;
}
}
}
static struct flag_name neigh_states[] = {
{ "incomplete", NUD_INCOMPLETE },
{ "reachable", NUD_REACHABLE },
{ "stale", NUD_STALE },
{ "delay", NUD_DELAY },
{ "probe", NUD_PROBE },
{ "failed", NUD_FAILED },
{ "noarp", NUD_NOARP },
{ "permanent", NUD_PERMANENT },
{ "none", NUD_NONE },
{ NULL, 0 },
};
/* Copied from linux/neighbour.h */
#ifndef NTF_USE
# define NTF_USE 0x01
#endif
#ifndef NTF_SELF
# define NTF_SELF 0x02
#endif
#ifndef NTF_MASTER
# define NTF_MASTER 0x04
#endif
#ifndef NTF_PROXY
# define NTF_PROXY 0x08
#endif
#ifndef NTF_EXT_LEARNED
# define NTF_EXT_LEARNED 0x10
#endif
#ifndef NTF_ROUTER
# define NTF_ROUTER 0x80
#endif
static struct flag_name neigh_flags[] = {
{ "use", NTF_USE },
{ "self", NTF_SELF },
{ "master", NTF_MASTER },
{ "proxy", NTF_PROXY },
{ "ext learned", NTF_EXT_LEARNED },
{ "router", NTF_ROUTER },
{ NULL, 0 },
};
static void rtnl_print_neigh(struct nlmsghdr *hdr)
{
struct ndmsg *ndm = NLMSG_DATA(hdr);
uint32_t attrs_len = NDA_PAYLOAD(hdr);
struct rtattr *attr = NDA_RTA(ndm);
struct nda_cacheinfo *ci;
int hz = get_user_hz();
char addr_str[256];
char hw_addr[30];
char states[256];
char flags[256];
if (hdr->nlmsg_len < NLMSG_LENGTH(sizeof(*ndm)))
return;
tprintf(" [ Neigh Family %d (%s%s%s)", ndm->ndm_family,
colorize_start(bold),
addr_family2str(ndm->ndm_family),
colorize_end());
tprintf(", Link Index %d", ndm->ndm_ifindex);
tprintf(", State %d (%s%s%s)", ndm->ndm_state,
colorize_start(bold),
flags2str(neigh_states, ndm->ndm_state, states,
sizeof(states)),
colorize_end());
tprintf(", Flags %d (%s%s%s)", ndm->ndm_flags,
colorize_start(bold),
flags2str(neigh_flags, ndm->ndm_flags, flags,
sizeof(flags)),
colorize_end());
tprintf(", Type %d (%s%s%s)", ndm->ndm_type,
colorize_start(bold),
route_type2str(ndm->ndm_type),
colorize_end());
tprintf(" ]\n");
for (; RTA_OK(attr, attrs_len); attr = RTA_NEXT(attr, attrs_len)) {
switch (attr->rta_type) {
case NDA_DST:
rta_fmt(attr, "Address %s", addr2str(ndm->ndm_family,
RTA_DATA(attr), addr_str,
sizeof(addr_str)));
break;
case NDA_LLADDR:
rta_fmt(attr, "HW Address %s",
device_addr2str(RTA_DATA(attr),
RTA_LEN(attr), 0, hw_addr,
sizeof(hw_addr)));
break;
case NDA_PROBES:
rta_fmt(attr, "Probes %d", RTA_UINT32(attr));
break;
case NDA_CACHEINFO:
ci = RTA_DATA(attr);
tprintf("\tA: Cache (");
tprintf("confirmed(%ds)", ci->ndm_confirmed / hz);
tprintf(", used(%ds)", ci->ndm_used / hz);
tprintf(", updated(%ds)", ci->ndm_updated / hz);
tprintf(", refcnt(%d))", ci->ndm_refcnt);
tprintf(", Len %d\n", RTA_LEN(attr));
break;
default:
rta_fmt(attr, "0x%x", attr->rta_type);
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);
break;
case RTM_NEWADDR:
case RTM_DELADDR:
case RTM_GETADDR:
rtnl_print_ifaddr(hdr);
break;
case RTM_NEWROUTE:
case RTM_DELROUTE:
case RTM_GETROUTE:
rtnl_print_route(hdr);
break;
case RTM_NEWNEIGH:
case RTM_DELNEIGH:
case RTM_GETNEIGH:
rtnl_print_neigh(hdr);
break;
}
}
static const char *genl_cmd2str(uint8_t table)
{
switch (table) {
case CTRL_CMD_UNSPEC: return "unspec";
case CTRL_CMD_NEWFAMILY: return "new family";
case CTRL_CMD_DELFAMILY: return "del family";
case CTRL_CMD_GETFAMILY: return "get family";
case CTRL_CMD_NEWOPS: return "new ops";
case CTRL_CMD_DELOPS: return "del ops";
case CTRL_CMD_GETOPS: return "get ops";
case CTRL_CMD_NEWMCAST_GRP: return "new mcast group";
case CTRL_CMD_DELMCAST_GRP: return "del mcast group";
case CTRL_CMD_GETMCAST_GRP: return "get mcast group";
default: return "Unknown";
}
}
static struct flag_name genl_ops_flags[] = {
{ "admin", GENL_ADMIN_PERM },
{ "doit", GENL_CMD_CAP_DO },
{ "dumpit", GENL_CMD_CAP_DUMP },
{ "policy", GENL_CMD_CAP_HASPOL },
{ NULL, 0 },
};
static void genl_print_ops_attr(struct nlattr *attr, uint32_t attr_len)
{
char str[256];
uint32_t flags;
for (; NLA_OK(attr, attr_len); attr = NLA_NEXT(attr, attr_len)) {
switch (attr->nla_type) {
case CTRL_ATTR_OP_ID:
nla_fmt_nested(attr, "Id 0x%x", NLA_UINT32(attr));
break;
case CTRL_ATTR_OP_FLAGS:
flags = NLA_UINT32(attr);
nla_fmt_nested(attr, "Flags 0x%x (%s%s%s)", flags,
colorize_start(bold),
flags2str(genl_ops_flags, flags, str, sizeof(str)),
colorize_end());
break;
default:
nla_fmt_nested(attr, "0x%x", attr->nla_type);
break;
}
}
}
static void genl_print_ops_list(struct nlattr *attr, uint32_t attr_len)
{
for (; NLA_OK(attr, attr_len); attr = NLA_NEXT(attr, attr_len)) {
nla_fmt_nested_start(attr, "0x%x", attr->nla_type);
genl_print_ops_attr(NLA_DATA(attr), NLA_LEN(attr));
nla_fmt_nested_end();
}
}
static void genl_print_mcast_group(struct nlattr *attr, uint32_t attr_len)
{
for (; NLA_OK(attr, attr_len); attr = NLA_NEXT(attr, attr_len)) {
switch (attr->nla_type) {
case CTRL_ATTR_MCAST_GRP_ID:
nla_fmt_nested(attr, "Id 0x%x", NLA_UINT32(attr));
break;
case CTRL_ATTR_MCAST_GRP_NAME:
nla_fmt_nested(attr, "Name %s", NLA_STR(attr));
break;
default:
nla_fmt_nested(attr, "0x%x", attr->nla_type);
break;
}
}
}
static void genl_print_mc_groups(struct nlattr *attr, uint32_t attr_len)
{
for (; NLA_OK(attr, attr_len); attr = NLA_NEXT(attr, attr_len)) {
nla_fmt_nested_start(attr, "0x%x", attr->nla_type);
genl_print_mcast_group(NLA_DATA(attr), NLA_LEN(attr));
nla_fmt_nested_end();
}
}
static void genl_print_ctrl_attrs(struct nlmsghdr *hdr)
{
struct genlmsghdr *genl = NLMSG_DATA(hdr);
struct nlattr *attr = GEN_NLA(genl);
uint32_t attrs_len = NLMSG_PAYLOAD(hdr, sizeof(struct genlmsghdr));
for (; NLA_OK(attr, attrs_len); attr = NLA_NEXT(attr, attrs_len)) {
switch (attr->nla_type) {
case CTRL_ATTR_FAMILY_ID:
nla_fmt(attr, "Family Id 0x%x", NLA_UINT16(attr));
break;
case CTRL_ATTR_FAMILY_NAME:
nla_fmt(attr, "Family Name %s", NLA_STR(attr));
break;
case CTRL_ATTR_VERSION:
nla_fmt(attr, "Version %u", NLA_UINT32(attr));
break;
case CTRL_ATTR_HDRSIZE:
nla_fmt(attr, "Header size %u", NLA_UINT32(attr));
break;
case CTRL_ATTR_MAXATTR:
nla_fmt(attr, "Max attr value 0x%x", NLA_UINT32(attr));
break;
case CTRL_ATTR_OPS:
nla_fmt(attr, "Ops list");
genl_print_ops_list(NLA_DATA(attr), NLA_LEN(attr));
break;
case CTRL_ATTR_MCAST_GROUPS:
nla_fmt(attr, "Mcast groups");
genl_print_mc_groups(NLA_DATA(attr), NLA_LEN(attr));
break;
default:
nla_fmt(attr, "0x%x", attr->nla_type);
break;
}
}
}
static void genl_msg_print(struct nlmsghdr *hdr)
{
struct genlmsghdr *genl;
if (hdr->nlmsg_type != GENL_ID_CTRL) {
nlmsg_print_raw(hdr);
return;
}
genl = NLMSG_DATA(hdr);
tprintf(" [ Cmd %u (%s%s%s)", genl->cmd,
colorize_start(bold), genl_cmd2str(genl->cmd), colorize_end());
tprintf(", Version %u", genl->version);
tprintf(", Reserved %u", genl->reserved);
tprintf(" ]\n");
genl_print_ctrl_attrs(hdr);
}
static void nlmsg_print(uint16_t family, struct nlmsghdr *hdr)
{
u16 nlmsg_flags = hdr->nlmsg_flags;
char type[32];
char flags[128];
char procname[PATH_MAX];
/* Look up the process name if message is not coming from the kernel.
*
* Note that the port id is not necessarily equal to the PID of the
* receiving process (e.g. if the application is multithreaded or using
* multiple sockets). In these cases we're not able to find a matching
* PID and the information will not be printed.
*/
if (hdr->nlmsg_pid != 0) {
if (proc_get_cmdline(hdr->nlmsg_pid, procname, sizeof(procname)) < 0)
snprintf(procname, sizeof(procname), "unknown process");
} else
snprintf(procname, sizeof(procname), "kernel");
tprintf(" [ NLMSG ");
tprintf("Family %d (%s%s%s), ", family,
colorize_start(bold),
nlmsg_family2str(family),
colorize_end());
tprintf("Len %u, ", hdr->nlmsg_len);
tprintf("Type 0x%.4x (%s%s%s), ", hdr->nlmsg_type,
colorize_start(bold),
nlmsg_type2str(family, hdr->nlmsg_type, type, sizeof(type)),
colorize_end());
tprintf("Flags 0x%.4x (%s%s%s), ", nlmsg_flags,
colorize_start(bold),
nlmsg_flags ? nl_nlmsg_flags2str(nlmsg_flags, flags, sizeof(flags)) : "none",
colorize_end());
tprintf("Seq-Nr %u, ", hdr->nlmsg_seq);
tprintf("PID %u", hdr->nlmsg_pid);
if (procname[0])
tprintf(" (%s%s%s)", colorize_start(bold), basename(procname),
colorize_end());
tprintf(" ]\n");
switch (family) {
case NETLINK_ROUTE:
rtnl_msg_print(hdr);
break;
case NETLINK_GENERIC:
genl_msg_print(hdr);
break;
default:
nlmsg_print_raw(hdr);
}
}
static void nlmsg(struct pkt_buff *pkt)
{
struct nlmsghdr *hdr = (struct nlmsghdr *) pkt_pull(pkt, NLMSG_HDRLEN);
unsigned int trim_len = pkt_len(pkt);
while (hdr) {
trim_len -= hdr->nlmsg_len;
nlmsg_print(ntohs(pkt->sll->sll_protocol), hdr);
if (!pkt_pull(pkt, NLMSG_ALIGN(hdr->nlmsg_len) - NLMSG_HDRLEN))
break;
hdr = (struct nlmsghdr *) pkt_pull(pkt, NLMSG_HDRLEN);
if (hdr == NULL)
break;
if (hdr->nlmsg_len == 0)
break;
if (hdr->nlmsg_type != NLMSG_DONE &&
(hdr->nlmsg_flags & NLM_F_MULTI))
tprintf("\n");
}
/* mmaped packet? */
if (hdr && hdr->nlmsg_len == 0)
pkt_trim(pkt, trim_len);
}
static void nlmsg_less(struct pkt_buff *pkt)
{
struct nlmsghdr *hdr = (struct nlmsghdr *) pkt_pull(pkt, NLMSG_HDRLEN);
uint16_t family = ntohs(pkt->sll->sll_protocol);
char type[32];
if (hdr == NULL)
return;
tprintf(" NLMSG Family %d (%s%s%s), ", family,
colorize_start(bold),
nlmsg_family2str(family),
colorize_end());
tprintf("Type %u (%s%s%s)", hdr->nlmsg_type,
colorize_start(bold),
nlmsg_type2str(family, hdr->nlmsg_type, type, sizeof(type)),
colorize_end());
}
struct protocol nlmsg_ops = {
.print_full = nlmsg,
.print_less = nlmsg_less,
};
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