/*
* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-2000 Wichert Akkerman <wichert@cistron.nl>
* Copyright (c) 2005-2016 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2016-2017 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "defs.h"
#include "print_fields.h"
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "netlink.h"
#include <linux/if_packet.h>
#include <linux/if_arp.h>
#include <linux/if_ether.h>
#ifdef HAVE_NETIPX_IPX_H
# include <netipx/ipx.h>
#else
# include <linux/ipx.h>
#endif
#include "xlat/addrfams.h"
#include "xlat/arp_hardware_types.h"
#include "xlat/ethernet_protocols.h"
#include "xlat/af_packet_types.h"
#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
# include <bluetooth/bluetooth.h>
# include <bluetooth/hci.h>
# include <bluetooth/l2cap.h>
# include <bluetooth/rfcomm.h>
# include <bluetooth/sco.h>
# include "xlat/hci_channels.h"
#endif
#define SIZEOF_SA_FAMILY sizeof(((struct sockaddr *) 0)->sa_family)
static void
print_sockaddr_data_un(const void *const buf, const int addrlen)
{
const struct sockaddr_un *const sa_un = buf;
const int un_len = addrlen > (int) sizeof(*sa_un)
? (int) sizeof(*sa_un) : addrlen;
const int path_len = un_len - SIZEOF_SA_FAMILY;
tprints("sun_path=");
if (sa_un->sun_path[0]) {
print_quoted_string(sa_un->sun_path, path_len + 1,
QUOTE_0_TERMINATED);
} else {
tprints("@");
print_quoted_string(sa_un->sun_path + 1, path_len - 1, 0);
}
}
bool
print_inet_addr(const int af,
const void *const addr,
const unsigned int len,
const char *const var_name)
{
char buf[INET6_ADDRSTRLEN];
switch (af) {
case AF_INET:
if (inet_ntop(af, addr, buf, sizeof(buf))) {
if (var_name)
tprintf("%s=inet_addr(\"%s\")", var_name, buf);
else
tprints(buf);
return true;
}
break;
case AF_INET6:
if (inet_ntop(af, addr, buf, sizeof(buf))) {
if (var_name)
tprintf("inet_pton(%s, \"%s\", &%s)",
"AF_INET6", buf, var_name);
else
tprints(buf);
return true;
}
break;
}
if (var_name)
tprintf("%s=", var_name);
print_quoted_string(addr, len, QUOTE_FORCE_HEX);
return false;
}
bool
decode_inet_addr(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const int family,
const char *const var_name)
{
union {
struct in_addr a4;
struct in6_addr a6;
} addrbuf;
size_t size = 0;
switch (family) {
case AF_INET:
size = sizeof(addrbuf.a4);
break;
case AF_INET6:
size = sizeof(addrbuf.a6);
break;
}
if (!size || len < size) {
if (var_name)
tprintf("%s=", var_name);
printstr_ex(tcp, addr, len, QUOTE_FORCE_HEX);
return false;
}
if (umoven(tcp, addr, size, &addrbuf) < 0) {
if (var_name)
tprintf("%s=", var_name);
printaddr(addr);
return false;
}
return print_inet_addr(family, &addrbuf, size, var_name);
}
static void
print_sockaddr_data_in(const void *const buf, const int addrlen)
{
const struct sockaddr_in *const sa_in = buf;
PRINT_FIELD_NET_PORT("", *sa_in, sin_port);
PRINT_FIELD_INET4_ADDR(", ", *sa_in, sin_addr);
}
#define SIN6_MIN_LEN offsetof(struct sockaddr_in6, sin6_scope_id)
static void
print_sockaddr_data_in6(const void *const buf, const int addrlen)
{
const struct sockaddr_in6 *const sa_in6 = buf;
PRINT_FIELD_NET_PORT("", *sa_in6, sin6_port);
PRINT_FIELD_INET_ADDR(", ", *sa_in6, sin6_addr, AF_INET6);
tprintf(", sin6_flowinfo=htonl(%u)", ntohl(sa_in6->sin6_flowinfo));
if (addrlen <= (int) SIN6_MIN_LEN)
return;
#if defined IN6_IS_ADDR_LINKLOCAL && defined IN6_IS_ADDR_MC_LINKLOCAL
if (IN6_IS_ADDR_LINKLOCAL(&sa_in6->sin6_addr)
|| IN6_IS_ADDR_MC_LINKLOCAL(&sa_in6->sin6_addr))
PRINT_FIELD_IFINDEX(", ", *sa_in6, sin6_scope_id);
else
#endif
PRINT_FIELD_U(", ", *sa_in6, sin6_scope_id);
}
static void
print_sockaddr_data_ipx(const void *const buf, const int addrlen)
{
const struct sockaddr_ipx *const sa_ipx = buf;
unsigned int i;
PRINT_FIELD_NET_PORT("", *sa_ipx, sipx_port);
tprintf(", sipx_network=htonl(%#08x)"
", sipx_node=[",
ntohl(sa_ipx->sipx_network));
for (i = 0; i < IPX_NODE_LEN; ++i) {
tprintf("%s%#02x", i ? ", " : "",
sa_ipx->sipx_node[i]);
}
PRINT_FIELD_0X("], ", *sa_ipx, sipx_type);
}
static void
print_sockaddr_data_nl(const void *const buf, const int addrlen)
{
const struct sockaddr_nl *const sa_nl = buf;
PRINT_FIELD_D("", *sa_nl, nl_pid);
PRINT_FIELD_0X(", ", *sa_nl, nl_groups);
}
static void
print_sockaddr_data_ll(const void *const buf, const int addrlen)
{
const struct sockaddr_ll *const sa_ll = buf;
tprints("sll_protocol=htons(");
printxval(ethernet_protocols, ntohs(sa_ll->sll_protocol), "ETH_P_???");
PRINT_FIELD_IFINDEX("), ", *sa_ll, sll_ifindex);
tprints(", sll_hatype=");
printxval(arp_hardware_types, sa_ll->sll_hatype, "ARPHRD_???");
tprints(", sll_pkttype=");
printxval(af_packet_types, sa_ll->sll_pkttype, "PACKET_???");
tprintf(", sll_halen=%u", sa_ll->sll_halen);
if (sa_ll->sll_halen) {
const unsigned int oob_halen =
addrlen - offsetof(struct sockaddr_ll, sll_addr);
unsigned int i;
tprints(", sll_addr=[");
for (i = 0; i < sa_ll->sll_halen; ++i) {
if (i)
tprints(", ");
if (i >= oob_halen) {
tprints("...");
break;
}
tprintf("%#02x", sa_ll->sll_addr[i]);
}
tprints("]");
}
}
static void
print_sockaddr_data_raw(const void *const buf, const int addrlen)
{
const char *const data = buf + SIZEOF_SA_FAMILY;
const int datalen = addrlen - SIZEOF_SA_FAMILY;
tprints("sa_data=");
print_quoted_string(data, datalen, 0);
}
#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
static void
print_sockaddr_data_bt(const void *const buf, const int addrlen)
{
switch (addrlen) {
case sizeof(struct sockaddr_hci): {
const struct sockaddr_hci *const hci = buf;
tprintf("hci_dev=htobs(%hu), hci_channel=",
btohs(hci->hci_dev));
printxval(hci_channels, hci->hci_channel,
"HCI_CHANNEL_???");
break;
}
case sizeof(struct sockaddr_sco): {
const struct sockaddr_sco *const sco = buf;
tprintf("sco_bdaddr=%02x:%02x:%02x:%02x:%02x:%02x",
sco->sco_bdaddr.b[0], sco->sco_bdaddr.b[1],
sco->sco_bdaddr.b[2], sco->sco_bdaddr.b[3],
sco->sco_bdaddr.b[4], sco->sco_bdaddr.b[5]);
break;
}
case sizeof(struct sockaddr_rc): {
const struct sockaddr_rc *const rc = buf;
tprintf("rc_bdaddr=%02x:%02x:%02x:%02x:%02x:%02x"
", rc_channel=%u",
rc->rc_bdaddr.b[0], rc->rc_bdaddr.b[1],
rc->rc_bdaddr.b[2], rc->rc_bdaddr.b[3],
rc->rc_bdaddr.b[4], rc->rc_bdaddr.b[5],
rc->rc_channel);
break;
}
case sizeof(struct sockaddr_l2): {
const struct sockaddr_l2 *const l2 = buf;
tprintf("l2_psm=htobs(%hu)"
", l2_bdaddr=%02x:%02x:%02x:%02x:%02x:%02x"
", l2_cid=htobs(%hu), l2_bdaddr_type=%u",
btohs(l2->l2_psm),
l2->l2_bdaddr.b[0], l2->l2_bdaddr.b[1],
l2->l2_bdaddr.b[2], l2->l2_bdaddr.b[3],
l2->l2_bdaddr.b[4], l2->l2_bdaddr.b[5],
btohs(l2->l2_cid), l2->l2_bdaddr_type);
break;
}
default:
print_sockaddr_data_raw(buf, addrlen);
break;
}
}
#endif /* HAVE_BLUETOOTH_BLUETOOTH_H */
typedef void (* const sockaddr_printer)(const void *const, const int);
static const struct {
const sockaddr_printer printer;
const int min_len;
} sa_printers[] = {
[AF_UNIX] = { print_sockaddr_data_un, SIZEOF_SA_FAMILY + 1 },
[AF_INET] = { print_sockaddr_data_in, sizeof(struct sockaddr_in) },
[AF_IPX] = { print_sockaddr_data_ipx, sizeof(struct sockaddr_ipx) },
[AF_INET6] = { print_sockaddr_data_in6, SIN6_MIN_LEN },
[AF_NETLINK] = { print_sockaddr_data_nl, SIZEOF_SA_FAMILY + 1 },
[AF_PACKET] = { print_sockaddr_data_ll, sizeof(struct sockaddr_ll) },
#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
[AF_BLUETOOTH] = { print_sockaddr_data_bt, SIZEOF_SA_FAMILY + 1 },
#endif
};
void
print_sockaddr(const void *const buf, const int addrlen)
{
const struct sockaddr *const sa = buf;
tprints("{sa_family=");
printxval(addrfams, sa->sa_family, "AF_???");
if (addrlen > (int) SIZEOF_SA_FAMILY) {
tprints(", ");
if (sa->sa_family < ARRAY_SIZE(sa_printers)
&& sa_printers[sa->sa_family].printer
&& addrlen >= sa_printers[sa->sa_family].min_len) {
sa_printers[sa->sa_family].printer(buf, addrlen);
} else {
print_sockaddr_data_raw(buf, addrlen);
}
}
tprints("}");
}
int
decode_sockaddr(struct tcb *const tcp, const kernel_ulong_t addr, int addrlen)
{
if (addrlen < 2) {
printaddr(addr);
return -1;
}
union {
struct sockaddr sa;
struct sockaddr_storage storage;
char pad[sizeof(struct sockaddr_storage) + 1];
} addrbuf;
if ((unsigned) addrlen > sizeof(addrbuf.storage))
addrlen = sizeof(addrbuf.storage);
if (umoven_or_printaddr(tcp, addr, addrlen, addrbuf.pad))
return -1;
memset(&addrbuf.pad[addrlen], 0, sizeof(addrbuf.pad) - addrlen);
print_sockaddr(&addrbuf, addrlen);
return addrbuf.sa.sa_family;
}