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net.c
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/* net.c - core analysis suite
*
* Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc.
* Copyright (C) 2002-2016 David Anderson
* Copyright (C) 2002-2016 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "defs.h"
#include <netinet/in.h>
#include <netdb.h>
#include <net/if_arp.h>
#include <arpa/inet.h>
/*
* Cache values we need that can change based on OS version, or any other
* variables static to this file. These are setup in net_init(). Dump
* the table during runtime via "help -n".
*/
struct net_table {
ulong flags;
char *netdevice; /* name of net device */
char *dev_name_t; /* readmem ID's */
char *dev_type_t;
char *dev_addr_t;
long dev_name;
long dev_next;
long dev_type;
long dev_addr_len;
long dev_ip_ptr;
long in_device_ifa_list;
long in_ifaddr_ifa_next;
long in_ifaddr_ifa_address;
int net_device_name_index;
} net_table = { 0 };
struct net_table *net = &net_table;
#define NETDEV_INIT (0x1)
#define STRUCT_DEVICE (0x2)
#define STRUCT_NET_DEVICE (0x4)
#define SOCK_V1 (0x8)
#define SOCK_V2 (0x10)
#define NO_INET_SOCK (0x20)
#define DEV_NAME_MAX 100
struct devinfo {
char dev_name[DEV_NAME_MAX];
unsigned char dev_addr_len;
short dev_type;
};
#define BYTES_IP_ADDR 15 /* bytes to print IP addr (xxx.xxx.xxx.xxx) */
#define BYTES_PORT_NUM 5 /* bytes to print port number */
/* bytes needed for <ip address>:<port> notation */
#define BYTES_IP_TUPLE (BYTES_IP_ADDR + BYTES_PORT_NUM + 1)
static void show_net_devices(ulong);
static void show_net_devices_v2(ulong);
static void show_net_devices_v3(ulong);
static void print_neighbour_q(ulong, int);
static void get_netdev_info(ulong, struct devinfo *);
static void get_device_name(ulong, char *);
static long get_device_address(ulong, char **, long);
static void get_device_ip6_address(ulong, char **, long);
static void get_sock_info(ulong, char *);
static void dump_arp(void);
static void arp_state_to_flags(unsigned char);
static void dump_ether_hw(unsigned char *, int);
static void dump_sockets(ulong, struct reference *);
static int sym_socket_dump(ulong, int, int, ulong, struct reference *);
static void dump_hw_addr(unsigned char *, int);
static char *dump_in6_addr_port(uint16_t *, uint16_t, char *, int *);
#define MK_TYPE_T(f,s,m) \
do { \
(f) = malloc(strlen(s) + strlen(m) + 2); \
if ((f) == NULL) { \
error(WARNING, "malloc fail for type %s.%s", (s), (m)); \
} else { \
sprintf((f), "%s %s", (s), (m)); \
} \
} while(0)
void
net_init(void)
{
/*
* Note the order of the following checks. The device struct was
* renamed to net_device in 2.3, but there may be another struct
* called 'device' so we check for the new one first.
*/
STRUCT_SIZE_INIT(net_device, "net_device");
if (VALID_STRUCT(net_device)) {
net->netdevice = "net_device";
net->dev_next = MEMBER_OFFSET_INIT(net_device_next,
"net_device", "next");
net->dev_name = MEMBER_OFFSET_INIT(net_device_name,
"net_device", "name");
net->dev_type = MEMBER_OFFSET_INIT(net_device_type,
"net_device", "type");
net->dev_addr_len = MEMBER_OFFSET_INIT(net_device_addr_len,
"net_device", "addr_len");
net->dev_ip_ptr = MEMBER_OFFSET_INIT(net_device_ip_ptr,
"net_device", "ip_ptr");
MEMBER_OFFSET_INIT(net_device_dev_list, "net_device", "dev_list");
MEMBER_OFFSET_INIT(net_device_ip6_ptr, "net_device", "ip6_ptr");
MEMBER_OFFSET_INIT(inet6_dev_addr_list, "inet6_dev", "addr_list");
MEMBER_OFFSET_INIT(inet6_ifaddr_addr, "inet6_ifaddr", "addr");
MEMBER_OFFSET_INIT(inet6_ifaddr_if_list, "inet6_ifaddr", "if_list");
MEMBER_OFFSET_INIT(inet6_ifaddr_if_next, "inet6_ifaddr", "if_next");
MEMBER_OFFSET_INIT(in6_addr_in6_u, "in6_addr", "in6_u");
MEMBER_OFFSET_INIT(net_dev_base_head, "net", "dev_base_head");
ARRAY_LENGTH_INIT(net->net_device_name_index,
net_device_name, "net_device.name", NULL, sizeof(char));
net->flags |= (NETDEV_INIT|STRUCT_NET_DEVICE);
} else {
STRUCT_SIZE_INIT(device, "device");
if (VALID_STRUCT(device)) {
net->netdevice = "device";
net->dev_next = MEMBER_OFFSET_INIT(device_next,
"device", "next");
net->dev_name = MEMBER_OFFSET_INIT(device_name,
"device", "name");
net->dev_type = MEMBER_OFFSET_INIT(device_type,
"device", "type");
net->dev_ip_ptr = MEMBER_OFFSET_INIT(device_ip_ptr,
"device", "ip_ptr");
net->dev_addr_len = MEMBER_OFFSET_INIT(device_addr_len,
"device", "addr_len");
net->flags |= (NETDEV_INIT|STRUCT_DEVICE);
} else
error(WARNING,
"net_init: unknown device type for net device");
}
if (VALID_MEMBER(task_struct_nsproxy))
MEMBER_OFFSET_INIT(nsproxy_net_ns, "nsproxy", "net_ns");
if (net->flags & NETDEV_INIT) {
MK_TYPE_T(net->dev_name_t, net->netdevice, "name");
MK_TYPE_T(net->dev_type_t, net->netdevice, "type");
MK_TYPE_T(net->dev_addr_t, net->netdevice, "addr_len");
MEMBER_OFFSET_INIT(socket_sk, "socket", "sk");
MEMBER_OFFSET_INIT(neighbour_next, "neighbour", "next");
MEMBER_OFFSET_INIT(neighbour_primary_key,
"neighbour", "primary_key");
MEMBER_OFFSET_INIT(neighbour_ha, "neighbour", "ha");
MEMBER_OFFSET_INIT(neighbour_dev, "neighbour", "dev");
MEMBER_OFFSET_INIT(neighbour_nud_state,
"neighbour", "nud_state");
MEMBER_OFFSET_INIT(neigh_table_nht_ptr, "neigh_table", "nht");
if (VALID_MEMBER(neigh_table_nht_ptr)) {
MEMBER_OFFSET_INIT(neigh_table_hash_mask,
"neigh_hash_table", "hash_mask");
MEMBER_OFFSET_INIT(neigh_table_hash_shift,
"neigh_hash_table", "hash_shift");
MEMBER_OFFSET_INIT(neigh_table_hash_buckets,
"neigh_hash_table", "hash_buckets");
/* Linux 6.13 and later */
if (INVALID_MEMBER(neigh_table_hash_buckets)) {
MEMBER_OFFSET_INIT(neigh_table_hash_heads, "neigh_hash_table", "hash_heads");
MEMBER_OFFSET_INIT(neighbour_hash, "neighbour", "hash");
}
} else {
MEMBER_OFFSET_INIT(neigh_table_hash_buckets,
"neigh_table", "hash_buckets");
MEMBER_OFFSET_INIT(neigh_table_hash_mask,
"neigh_table", "hash_mask");
}
MEMBER_OFFSET_INIT(neigh_table_key_len,
"neigh_table", "key_len");
MEMBER_OFFSET_INIT(in_device_ifa_list,
"in_device", "ifa_list");
MEMBER_OFFSET_INIT(in_ifaddr_ifa_next,
"in_ifaddr", "ifa_next");
MEMBER_OFFSET_INIT(in_ifaddr_ifa_address,
"in_ifaddr", "ifa_address");
STRUCT_SIZE_INIT(sock, "sock");
MEMBER_OFFSET_INIT(sock_family, "sock", "family");
if (VALID_MEMBER(sock_family)) {
MEMBER_OFFSET_INIT(sock_daddr, "sock", "daddr");
MEMBER_OFFSET_INIT(sock_rcv_saddr, "sock", "rcv_saddr");
MEMBER_OFFSET_INIT(sock_dport, "sock", "dport");
MEMBER_OFFSET_INIT(sock_sport, "sock", "sport");
MEMBER_OFFSET_INIT(sock_num, "sock", "num");
MEMBER_OFFSET_INIT(sock_type, "sock", "type");
net->flags |= SOCK_V1;
} else {
/*
* struct sock {
* struct sock_common __sk_common;
* #define sk_family __sk_common.skc_family
* ...
*/
MEMBER_OFFSET_INIT(sock_common_skc_family,
"sock_common", "skc_family");
MEMBER_OFFSET_INIT(sock_sk_type, "sock", "sk_type");
MEMBER_OFFSET_INIT(sock_sk_common, "sock", "__sk_common");
MEMBER_OFFSET_INIT(sock_common_skc_v6_daddr, "sock_common", "skc_v6_daddr");
MEMBER_OFFSET_INIT(sock_common_skc_v6_rcv_saddr, "sock_common", "skc_v6_rcv_saddr");
/*
* struct inet_sock {
* struct sock sk;
* struct ipv6_pinfo *pinet6;
* struct inet_opt inet;
* };
*/
STRUCT_SIZE_INIT(inet_sock, "inet_sock");
STRUCT_SIZE_INIT(socket, "socket");
if (STRUCT_EXISTS("inet_opt")) {
MEMBER_OFFSET_INIT(inet_sock_inet, "inet_sock", "inet");
MEMBER_OFFSET_INIT(inet_opt_daddr, "inet_opt", "daddr");
MEMBER_OFFSET_INIT(inet_opt_rcv_saddr, "inet_opt", "rcv_saddr");
MEMBER_OFFSET_INIT(inet_opt_dport, "inet_opt", "dport");
MEMBER_OFFSET_INIT(inet_opt_sport, "inet_opt", "sport");
MEMBER_OFFSET_INIT(inet_opt_num, "inet_opt", "num");
} else { /* inet_opt moved to inet_sock */
ASSIGN_OFFSET(inet_sock_inet) = 0;
if (MEMBER_EXISTS("inet_sock", "daddr")) {
MEMBER_OFFSET_INIT(inet_opt_daddr, "inet_sock", "daddr");
MEMBER_OFFSET_INIT(inet_opt_rcv_saddr, "inet_sock", "rcv_saddr");
MEMBER_OFFSET_INIT(inet_opt_dport, "inet_sock", "dport");
MEMBER_OFFSET_INIT(inet_opt_sport, "inet_sock", "sport");
MEMBER_OFFSET_INIT(inet_opt_num, "inet_sock", "num");
} else if (MEMBER_EXISTS("inet_sock", "inet_daddr")) {
MEMBER_OFFSET_INIT(inet_opt_daddr, "inet_sock", "inet_daddr");
MEMBER_OFFSET_INIT(inet_opt_rcv_saddr, "inet_sock", "inet_rcv_saddr");
MEMBER_OFFSET_INIT(inet_opt_dport, "inet_sock", "inet_dport");
MEMBER_OFFSET_INIT(inet_opt_sport, "inet_sock", "inet_sport");
MEMBER_OFFSET_INIT(inet_opt_num, "inet_sock", "inet_num");
} else if ((MEMBER_OFFSET("inet_sock", "sk") == 0) &&
(MEMBER_OFFSET("sock", "__sk_common") == 0)) {
MEMBER_OFFSET_INIT(inet_opt_daddr, "sock_common", "skc_daddr");
if (INVALID_MEMBER(inet_opt_daddr))
ANON_MEMBER_OFFSET_INIT(inet_opt_daddr, "sock_common",
"skc_daddr");
MEMBER_OFFSET_INIT(inet_opt_rcv_saddr, "sock_common", "skc_rcv_saddr");
if (INVALID_MEMBER(inet_opt_rcv_saddr))
ANON_MEMBER_OFFSET_INIT(inet_opt_rcv_saddr, "sock_common",
"skc_rcv_saddr");
MEMBER_OFFSET_INIT(inet_opt_dport, "inet_sock", "inet_dport");
if (INVALID_MEMBER(inet_opt_dport)) {
MEMBER_OFFSET_INIT(inet_opt_dport, "sock_common",
"skc_dport");
if (INVALID_MEMBER(inet_opt_dport))
ANON_MEMBER_OFFSET_INIT(inet_opt_dport, "sock_common",
"skc_dport");
}
MEMBER_OFFSET_INIT(inet_opt_sport, "inet_sock", "inet_sport");
MEMBER_OFFSET_INIT(inet_opt_num, "inet_sock", "inet_num");
if (INVALID_MEMBER(inet_opt_num)) {
MEMBER_OFFSET_INIT(inet_opt_num, "sock_common", "skc_num");
if (INVALID_MEMBER(inet_opt_num))
ANON_MEMBER_OFFSET_INIT(inet_opt_num, "sock_common",
"skc_num");
}
}
}
if (VALID_STRUCT(inet_sock) &&
INVALID_MEMBER(inet_sock_inet)) {
/*
* gdb can't seem to figure out the inet_sock
* in later 2.6 kernels, returning this:
*
* struct inet_sock {
* <no data fields>
* }
*
* It does know the struct size, so kludge it
* to subtract the size of the inet_opt struct
* from the size of the containing inet_sock.
*/
net->flags |= NO_INET_SOCK;
ASSIGN_OFFSET(inet_sock_inet) =
SIZE(inet_sock) - STRUCT_SIZE("inet_opt");
}
/*
* If necessary, set inet_sock size and inet_sock_inet offset,
* accounting for the configuration-dependent, intervening,
* struct ipv6_pinfo pointer located in between the sock and
* inet_opt members of the inet_sock.
*/
if (!VALID_STRUCT(inet_sock))
{
if (symbol_exists("tcpv6_protocol") &&
symbol_exists("udpv6_protocol")) {
ASSIGN_SIZE(inet_sock) = SIZE(sock) +
sizeof(void *) + STRUCT_SIZE("inet_opt");
ASSIGN_OFFSET(inet_sock_inet) = SIZE(sock) +
sizeof(void *);
} else {
ASSIGN_SIZE(inet_sock) = SIZE(sock) +
STRUCT_SIZE("inet_opt");
ASSIGN_OFFSET(inet_sock_inet) = SIZE(sock);
}
}
MEMBER_OFFSET_INIT(ipv6_pinfo_rcv_saddr, "ipv6_pinfo", "rcv_saddr");
MEMBER_OFFSET_INIT(ipv6_pinfo_daddr, "ipv6_pinfo", "daddr");
STRUCT_SIZE_INIT(in6_addr, "in6_addr");
MEMBER_OFFSET_INIT(socket_alloc_vfs_inode, "socket_alloc", "vfs_inode");
net->flags |= SOCK_V2;
}
}
}
/*
* The net command...
*/
#define NETOPTS "N:asSR:xdn"
#define s_FLAG FOREACH_s_FLAG
#define S_FLAG FOREACH_S_FLAG
#define x_FLAG FOREACH_x_FLAG
#define d_FLAG FOREACH_d_FLAG
#define NET_REF_FOUND (0x1)
#define NET_REF_HEXNUM (0x2)
#define NET_REF_DECNUM (0x4)
#define NET_TASK_HEADER_PRINTED (0x8)
#define NET_SOCK_HEADER_PRINTED (0x10)
#define NET_REF_FOUND_ITEM (0x20)
#define NET_REFERENCE_CHECK(X) (X)
#define NET_REFERENCE_FOUND(X) ((X) && ((X)->cmdflags & NET_REF_FOUND))
void
cmd_net(void)
{
int c;
ulong sflag, nflag, aflag;
ulong value;
ulong task;
struct task_context *tc = NULL;
struct in_addr in_addr;
struct reference reference, *ref;
if (!(net->flags & NETDEV_INIT))
error(FATAL, "net subsystem not initialized!");
ref = NULL;
sflag = nflag = aflag = 0;
task = pid_to_task(0);
while ((c = getopt(argcnt, args, NETOPTS)) != EOF) {
switch (c) {
case 'R':
if (ref)
error(INFO, "only one -R option allowed\n");
else {
ref = &reference;
BZERO(ref, sizeof(struct reference));
ref->str = optarg;
}
break;
case 'a':
dump_arp();
aflag++;
break;
case 'N':
value = stol(optarg, FAULT_ON_ERROR, NULL);
in_addr.s_addr = (in_addr_t)value;
fprintf(fp, "%s\n", inet_ntoa(in_addr));
return;
case 's':
if (sflag & S_FLAG)
error(INFO,
"only one -s or -S option allowed\n");
else
sflag |= s_FLAG;
break;
case 'S':
if (sflag & s_FLAG)
error(INFO,
"only one -s or -S option allowed\n");
else
sflag |= S_FLAG;
break;
case 'x':
if (sflag & d_FLAG)
error(FATAL,
"-d and -x are mutually exclusive\n");
sflag |= x_FLAG;
break;
case 'd':
if (sflag & x_FLAG)
error(FATAL,
"-d and -x are mutually exclusive\n");
sflag |= d_FLAG;
break;
case 'n':
nflag = 1;
task = CURRENT_TASK();
if (args[optind]) {
switch (str_to_context(args[optind],
&value, &tc)) {
case STR_PID:
case STR_TASK:
task = tc->task;
break;
case STR_INVALID:
error(FATAL, "invalid task or pid value: %s\n", args[optind]);
}
}
break;
default:
argerrs++;
break;
}
}
if (argerrs)
cmd_usage(pc->curcmd, SYNOPSIS);
if (sflag & (s_FLAG|S_FLAG))
dump_sockets(sflag, ref);
else {
if ((argcnt == 1) || nflag)
show_net_devices(task);
else if (!aflag)
cmd_usage(pc->curcmd, SYNOPSIS);
}
}
/*
* Just display the address and name of each net device.
*/
static void
show_net_devices(ulong task)
{
ulong next;
long flen;
char *buf;
long buflen = BUFSIZE;
if (symbol_exists("dev_base_head")) {
show_net_devices_v2(task);
return;
} else if (symbol_exists("init_net")) {
show_net_devices_v3(task);
return;
}
if (!symbol_exists("dev_base"))
error(FATAL, "dev_base, dev_base_head or init_net do not exist!\n");
get_symbol_data("dev_base", sizeof(void *), &next);
if (!net->netdevice || !next)
return;
buf = GETBUF(buflen);
flen = MAX(VADDR_PRLEN, strlen(net->netdevice));
fprintf(fp, "%s NAME IP ADDRESS(ES)\n",
mkstring(upper_case(net->netdevice, buf),
flen, CENTER|LJUST, NULL));
do {
fprintf(fp, "%s ",
mkstring(buf, flen, CENTER|RJUST|LONG_HEX, MKSTR(next)));
get_device_name(next, buf);
fprintf(fp, "%-10s ", buf);
get_device_address(next, &buf, buflen);
get_device_ip6_address(next, &buf, buflen);
fprintf(fp, "%s\n", buf);
readmem(next+net->dev_next, KVADDR, &next,
sizeof(void *), "(net_)device.next", FAULT_ON_ERROR);
} while (next);
FREEBUF(buf);
}
static void
show_net_devices_v2(ulong task)
{
struct list_data list_data, *ld;
char *net_device_buf;
char *buf;
long buflen = BUFSIZE;
int ndevcnt, i;
long flen;
if (!net->netdevice) /* initialized in net_init() */
return;
buf = GETBUF(buflen);
flen = MAX(VADDR_PRLEN, strlen(net->netdevice));
fprintf(fp, "%s NAME IP ADDRESS(ES)\n",
mkstring(upper_case(net->netdevice, buf),
flen, CENTER|LJUST, NULL));
net_device_buf = GETBUF(SIZE(net_device));
ld = &list_data;
BZERO(ld, sizeof(struct list_data));
ld->flags |= LIST_ALLOCATE;
get_symbol_data("dev_base_head", sizeof(void *), &ld->start);
ld->end = symbol_value("dev_base_head");
ld->list_head_offset = OFFSET(net_device_dev_list);
ndevcnt = do_list(ld);
for (i = 0; i < ndevcnt; ++i) {
readmem(ld->list_ptr[i], KVADDR, net_device_buf,
SIZE(net_device), "net_device buffer",
FAULT_ON_ERROR);
fprintf(fp, "%s ",
mkstring(buf, flen, CENTER|RJUST|LONG_HEX,
MKSTR(ld->list_ptr[i])));
get_device_name(ld->list_ptr[i], buf);
fprintf(fp, "%-10s ", buf);
get_device_address(ld->list_ptr[i], &buf, buflen);
get_device_ip6_address(ld->list_ptr[i], &buf, buflen);
fprintf(fp, "%s\n", buf);
}
FREEBUF(ld->list_ptr);
FREEBUF(net_device_buf);
FREEBUF(buf);
}
static void
show_net_devices_v3(ulong task)
{
ulong nsproxy_p, net_ns_p;
struct list_data list_data, *ld;
char *net_device_buf;
char *buf;
long buflen = BUFSIZE;
int ndevcnt, i;
long flen;
if (!net->netdevice) /* initialized in net_init() */
return;
buf = GETBUF(buflen);
flen = MAX(VADDR_PRLEN, strlen(net->netdevice));
fprintf(fp, "%s NAME IP ADDRESS(ES)\n",
mkstring(upper_case(net->netdevice, buf),
flen, CENTER|LJUST, NULL));
net_device_buf = GETBUF(SIZE(net_device));
ld = &list_data;
BZERO(ld, sizeof(struct list_data));
ld->flags |= LIST_ALLOCATE;
if (VALID_MEMBER(nsproxy_net_ns)) {
readmem(task + OFFSET(task_struct_nsproxy), KVADDR, &nsproxy_p,
sizeof(ulong), "task_struct.nsproxy", FAULT_ON_ERROR);
if (!readmem(nsproxy_p + OFFSET(nsproxy_net_ns), KVADDR, &net_ns_p,
sizeof(ulong), "nsproxy.net_ns", RETURN_ON_ERROR|QUIET))
error(FATAL, "cannot determine net_namespace location!\n");
} else
net_ns_p = symbol_value("init_net");
ld->start = ld->end = net_ns_p + OFFSET(net_dev_base_head);
ld->list_head_offset = OFFSET(net_device_dev_list);
ndevcnt = do_list(ld);
/*
* Skip the first entry (init_net).
*/
for (i = 1; i < ndevcnt; ++i) {
readmem(ld->list_ptr[i], KVADDR, net_device_buf,
SIZE(net_device), "net_device buffer",
FAULT_ON_ERROR);
fprintf(fp, "%s ",
mkstring(buf, flen, CENTER|RJUST|LONG_HEX,
MKSTR(ld->list_ptr[i])));
get_device_name(ld->list_ptr[i], buf);
fprintf(fp, "%-10s ", buf);
get_device_address(ld->list_ptr[i], &buf, buflen);
get_device_ip6_address(ld->list_ptr[i], &buf, buflen);
fprintf(fp, "%s\n", buf);
}
FREEBUF(ld->list_ptr);
FREEBUF(net_device_buf);
FREEBUF(buf);
}
/*
* Perform the actual work of dumping the ARP table...
*/
#define ARP_HEADING \
"NEIGHBOUR IP ADDRESS HW TYPE HW ADDRESS DEVICE STATE"
static void
dump_arp(void)
{
ulong arp_tbl; /* address of arp_tbl */
ulong *hash_buckets;
ulong hash;
long hash_bytes;
int nhash_buckets = 0;
int key_len;
int i;
int header_printed = 0;
int hash_mask = 0;
ulong nht;
if (!symbol_exists("arp_tbl"))
error(FATAL, "arp_tbl does not exist in this kernel\n");
arp_tbl = symbol_value("arp_tbl");
/*
* NOTE: 2.6.8 -> 2.6.9 neigh_table struct changed from:
*
* struct neighbour *hash_buckets[32];
* to
* struct neighbour **hash_buckets;
*
* Use 'hash_mask' as indicator to decide if we're dealing
* with an array or a pointer.
*
* Around 2.6.37 neigh_hash_table struct has been introduced
* and pointer to it has been added to neigh_table.
*/
if (VALID_MEMBER(neigh_table_nht_ptr)) {
readmem(arp_tbl + OFFSET(neigh_table_nht_ptr),
KVADDR, &nht, sizeof(nht),
"neigh_table nht", FAULT_ON_ERROR);
/* NB! Re-use of offsets like neigh_table_hash_mask
* with neigh_hash_table structure */
if (VALID_MEMBER(neigh_table_hash_mask)) {
readmem(nht + OFFSET(neigh_table_hash_mask),
KVADDR, &hash_mask, sizeof(hash_mask),
"neigh_hash_table hash_mask", FAULT_ON_ERROR);
nhash_buckets = hash_mask + 1;
} else if (VALID_MEMBER(neigh_table_hash_shift)) {
readmem(nht + OFFSET(neigh_table_hash_shift),
KVADDR, &hash_mask, sizeof(hash_mask),
"neigh_hash_table hash_shift", FAULT_ON_ERROR);
nhash_buckets = 1U << hash_mask;
}
} else if (VALID_MEMBER(neigh_table_hash_mask)) {
readmem(arp_tbl + OFFSET(neigh_table_hash_mask),
KVADDR, &hash_mask, sizeof(hash_mask),
"neigh_table hash_mask", FAULT_ON_ERROR);
nhash_buckets = hash_mask + 1;
} else
nhash_buckets = (i = ARRAY_LENGTH(neigh_table_hash_buckets)) ?
i : get_array_length("neigh_table.hash_buckets",
NULL, sizeof(void *));
if (nhash_buckets == 0) {
option_not_supported('a');
return;
}
hash_bytes = nhash_buckets * sizeof(*hash_buckets);
hash_buckets = (ulong *)GETBUF(hash_bytes);
readmem(arp_tbl + OFFSET(neigh_table_key_len),
KVADDR, &key_len, sizeof(key_len),
"neigh_table key_len", FAULT_ON_ERROR);
if (VALID_MEMBER(neigh_table_nht_ptr)) {
/* Linux 6.13 and later */
if (VALID_MEMBER(neigh_table_hash_heads))
readmem(nht + OFFSET(neigh_table_hash_heads), KVADDR, &hash,
sizeof(hash), "neigh_hash_table hash_heads ptr", FAULT_ON_ERROR);
else
readmem(nht + OFFSET(neigh_table_hash_buckets), KVADDR, &hash,
sizeof(hash), "neigh_hash_table hash_buckets ptr", FAULT_ON_ERROR);
readmem(hash, KVADDR, hash_buckets, hash_bytes,
"neigh_hash_table hash_buckets", FAULT_ON_ERROR);
} else if (hash_mask) {
readmem(arp_tbl + OFFSET(neigh_table_hash_buckets),
KVADDR, &hash, sizeof(hash),
"neigh_table hash_buckets pointer", FAULT_ON_ERROR);
readmem(hash,
KVADDR, hash_buckets, hash_bytes,
"neigh_table hash_buckets", FAULT_ON_ERROR);
} else
readmem(arp_tbl + OFFSET(neigh_table_hash_buckets),
KVADDR, hash_buckets, hash_bytes,
"neigh_table hash_buckets", FAULT_ON_ERROR);
for (i = 0; i < nhash_buckets; i++) {
if (hash_buckets[i] != (ulong)NULL) {
if (!header_printed) {
fprintf(fp, "%s\n", ARP_HEADING);
header_printed = 1;
}
print_neighbour_q(hash_buckets[i], key_len);
}
}
fflush(fp);
FREEBUF(hash_buckets);
}
/*
* Dump out the relevant information of a neighbour structure for the
* ARP table.
*/
static void
print_neighbour_q(ulong addr, int key_len)
{
int i;
ulong dev; /* dev address of this struct */
unsigned char *ha_buf; /* buffer for hardware address */
uint ha_size; /* size of HW address */
uint ipaddr; /* hold ipaddr (aka primary_key) */
struct devinfo dinfo;
unsigned char state; /* state of ARP entry */
struct in_addr in_addr;
ha_size = (i = ARRAY_LENGTH(neighbour_ha)) ?
i : get_array_length("neighbour.ha", NULL, sizeof(char));
ha_buf = (unsigned char *)GETBUF(ha_size);
while (addr) {
readmem(addr + OFFSET(neighbour_primary_key), KVADDR,
&ipaddr, sizeof(ipaddr), "neighbour primary_key",
FAULT_ON_ERROR);
readmem(addr + OFFSET(neighbour_ha), KVADDR, ha_buf, ha_size,
"neighbour ha", FAULT_ON_ERROR);
readmem(addr + OFFSET(neighbour_dev), KVADDR, &dev, sizeof(dev),
"neighbour dev", FAULT_ON_ERROR);
get_netdev_info(dev, &dinfo);
readmem(addr + OFFSET(neighbour_nud_state), KVADDR,
&state, sizeof(state), "neighbour nud_state",
FAULT_ON_ERROR);
in_addr.s_addr = ipaddr;
fprintf(fp, "%-16lx %-16s", addr, inet_ntoa(in_addr));
switch (dinfo.dev_type) {
case ARPHRD_ETHER:
/*
* Use the actual HW address size in the device struct
* rather than the max size of the array (as was done
* during the readmem() call above....
*/
fprintf(fp, "%-10s ", "ETHER");
dump_ether_hw(ha_buf, dinfo.dev_addr_len);
break;
case ARPHRD_NETROM:
fprintf(fp, "%-10s ", "NETROM");
dump_hw_addr(ha_buf, dinfo.dev_addr_len);
break;
case ARPHRD_EETHER:
fprintf(fp, "%-10s ", "EETHER");
dump_hw_addr(ha_buf, dinfo.dev_addr_len);
break;
case ARPHRD_AX25:
fprintf(fp, "%-10s ", "AX25");
dump_hw_addr(ha_buf, dinfo.dev_addr_len);
break;
case ARPHRD_PRONET:
fprintf(fp, "%-10s ", "PRONET");
dump_hw_addr(ha_buf, dinfo.dev_addr_len);
break;
case ARPHRD_CHAOS:
fprintf(fp, "%-10s ", "CHAOS");
dump_hw_addr(ha_buf, dinfo.dev_addr_len);
break;
case ARPHRD_IEEE802:
fprintf(fp, "%-10s ", "IEEE802");
dump_hw_addr(ha_buf, dinfo.dev_addr_len);
break;
case ARPHRD_ARCNET:
fprintf(fp, "%-10s ", "ARCNET");
dump_hw_addr(ha_buf, dinfo.dev_addr_len);
break;
case ARPHRD_APPLETLK:
fprintf(fp, "%-10s ", "APPLETLK");
dump_hw_addr(ha_buf, dinfo.dev_addr_len);
break;
case ARPHRD_DLCI:
fprintf(fp, "%-10s ", "DLCI");
dump_hw_addr(ha_buf, dinfo.dev_addr_len);
break;
case ARPHRD_METRICOM:
fprintf(fp, "%-10s ", "METRICOM");
dump_hw_addr(ha_buf, dinfo.dev_addr_len);
break;
default:
fprintf(fp, "%-10s ", "UNKNOWN");
dump_hw_addr(ha_buf, dinfo.dev_addr_len);
break;
}
fprintf(fp, " %-6s ", dinfo.dev_name);
arp_state_to_flags(state);
/* Linux 6.13 and later kernels use hlist. */
if (VALID_MEMBER(neighbour_hash)) {
readmem(addr + OFFSET(neighbour_hash), KVADDR, &addr,
sizeof(addr), "neighbour hash", FAULT_ON_ERROR);
if (addr)
addr -= OFFSET(neighbour_hash);
} else
readmem(addr + OFFSET(neighbour_next), KVADDR, &addr,
sizeof(addr), "neighbour next", FAULT_ON_ERROR);
}
FREEBUF(ha_buf);
}
/*
* read netdevice info....
*/
static void
get_netdev_info(ulong devaddr, struct devinfo *dip)
{
short dev_type;
get_device_name(devaddr, dip->dev_name);
readmem(devaddr + net->dev_type, KVADDR,
&dev_type, sizeof(dev_type), net->dev_type_t, FAULT_ON_ERROR);
dip->dev_type = dev_type;
readmem(devaddr + net->dev_addr_len, KVADDR,
&dip->dev_addr_len, sizeof(dip->dev_addr_len), net->dev_addr_t,
FAULT_ON_ERROR);
}
/*
* Get the device name.
*/
static void
get_device_name(ulong devaddr, char *buf)
{
ulong name_addr;
switch (net->flags & (STRUCT_DEVICE|STRUCT_NET_DEVICE))
{
case STRUCT_NET_DEVICE:
if (net->net_device_name_index > 0) {
readmem(devaddr + net->dev_name, KVADDR,
buf, net->net_device_name_index,
net->dev_name_t, FAULT_ON_ERROR);
return;
}
/* fallthrough */
case STRUCT_DEVICE:
readmem(devaddr + net->dev_name, KVADDR,
&name_addr, sizeof(name_addr), net->dev_name_t,
FAULT_ON_ERROR);
read_string(name_addr, buf, DEV_NAME_MAX);
break;
}
}
/*
* Get the device address.
*
* {net_}device->ip_ptr points to in_device.
* in_device->in_ifaddr points to in_ifaddr list.
* in_ifaddr->ifa_address contains the address.
* in_ifaddr->ifa_next points to the next in_ifaddr in the list (if any).
*
*/
static long
get_device_address(ulong devaddr, char **bufp, long buflen)
{
ulong ip_ptr, ifa_list;
struct in_addr ifa_address;
char *buf;
char buf2[BUFSIZE];
long pos = 0;
buf = *bufp;
BZERO(buf, buflen);
BZERO(buf2, BUFSIZE);
readmem(devaddr + net->dev_ip_ptr, KVADDR,
&ip_ptr, sizeof(ulong), "ip_ptr", FAULT_ON_ERROR);
if (!ip_ptr)
return buflen;
readmem(ip_ptr + OFFSET(in_device_ifa_list), KVADDR,
&ifa_list, sizeof(ulong), "ifa_list", FAULT_ON_ERROR);
while (ifa_list) {
readmem(ifa_list + OFFSET(in_ifaddr_ifa_address), KVADDR,
&ifa_address, sizeof(struct in_addr), "ifa_address",
FAULT_ON_ERROR);
sprintf(buf2, "%s%s", pos ? ", " : "", inet_ntoa(ifa_address));
if (pos + strlen(buf2) >= buflen) {
RESIZEBUF(*bufp, buflen, buflen * 2);
buf = *bufp;
BZERO(buf + buflen, buflen);
buflen *= 2;
}
BCOPY(buf2, &buf[pos], strlen(buf2));
pos += strlen(buf2);
readmem(ifa_list + OFFSET(in_ifaddr_ifa_next), KVADDR,
&ifa_list, sizeof(ulong), "ifa_next", FAULT_ON_ERROR);
}
return buflen;
}
static void
get_device_ip6_address(ulong devaddr, char **bufp, long buflen)
{
ulong ip6_ptr = 0, pos = 0, bufsize = buflen, addr = 0;
struct in6_addr ip6_addr;
char *buf;
char str[INET6_ADDRSTRLEN] = {0};
char buffer[INET6_ADDRSTRLEN + 2] = {0};
uint len = 0;
buf = *bufp;
pos = strlen(buf);
readmem(devaddr + OFFSET(net_device_ip6_ptr), KVADDR,
&ip6_ptr, sizeof(ulong), "ip6_ptr", FAULT_ON_ERROR);
if (!ip6_ptr)
return;
/*
* 502a2ffd7376 ("ipv6: convert idev_list to list macros")
* v2.6.35-rc1~473^2~733
*/
if (VALID_MEMBER(inet6_ifaddr_if_list)) {
struct list_data list_data, *ld;
ulong cnt = 0, i;
ld = &list_data;
BZERO(ld, sizeof(struct list_data));
ld->flags |= LIST_ALLOCATE;
ld->start = ip6_ptr + OFFSET(inet6_dev_addr_list);
ld->list_head_offset = OFFSET(inet6_ifaddr_if_list);
cnt = do_list(ld);
for (i = 1; i < cnt; i++) {
addr = ld->list_ptr[i] + OFFSET(inet6_ifaddr_addr);
readmem(addr + OFFSET(in6_addr_in6_u), KVADDR, &ip6_addr,
sizeof(struct in6_addr), "in6_addr.in6_u", FAULT_ON_ERROR);
inet_ntop(AF_INET6, (void*)&ip6_addr, str, INET6_ADDRSTRLEN);
sprintf(buffer, "%s%s", pos ? ", " : "", str);
len = strlen(buffer);