strace/sock.c
Dmitry V. Levin ce1f4d12aa Intorduce PRINT_FIELD_SOCKADDR
* print_fields.h (PRINT_FIELD_SOCKADDR): New macro.
* msghdr.c (print_cmsg_ip_recverr): Use it instead of print_sockaddr.
* net.c (print_group_req): Likewise.
* sock.c (PRINT_IFREQ_ADDR): Remove.
(print_ifreq, print_ifconf_ifreq): Use PRINT_FIELD_SOCKADDR
instead of PRINT_IFREQ_ADDR.
2017-07-09 18:43:34 +00:00

376 lines
8.7 KiB
C

/*
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-2017 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>
#if defined ALPHA || defined SH || defined SH64
# include <linux/ioctl.h>
#endif
#include <linux/sockios.h>
#include <arpa/inet.h>
#include <net/if.h>
#include DEF_MPERS_TYPE(struct_ifconf)
#include DEF_MPERS_TYPE(struct_ifreq)
typedef struct ifconf struct_ifconf;
typedef struct ifreq struct_ifreq;
#include MPERS_DEFS
#include "xlat/iffflags.h"
static void
print_ifname(const char *ifname)
{
print_quoted_string(ifname, IFNAMSIZ + 1, QUOTE_0_TERMINATED);
}
static void
print_ifreq(struct tcb *const tcp, const unsigned int code,
const kernel_ulong_t arg, const struct_ifreq *const ifr)
{
switch (code) {
case SIOCSIFADDR:
case SIOCGIFADDR:
PRINT_FIELD_SOCKADDR("", *ifr, ifr_addr);
break;
case SIOCSIFDSTADDR:
case SIOCGIFDSTADDR:
PRINT_FIELD_SOCKADDR("", *ifr, ifr_dstaddr);
break;
case SIOCSIFBRDADDR:
case SIOCGIFBRDADDR:
PRINT_FIELD_SOCKADDR("", *ifr, ifr_broadaddr);
break;
case SIOCSIFNETMASK:
case SIOCGIFNETMASK:
PRINT_FIELD_SOCKADDR("", *ifr, ifr_netmask);
break;
case SIOCSIFHWADDR:
case SIOCGIFHWADDR: {
/* XXX Are there other hardware addresses
than 6-byte MACs? */
const unsigned char *bytes =
(unsigned char *) &ifr->ifr_hwaddr.sa_data;
tprintf("ifr_hwaddr=%02x:%02x:%02x:%02x:%02x:%02x",
bytes[0], bytes[1], bytes[2],
bytes[3], bytes[4], bytes[5]);
break;
}
case SIOCSIFFLAGS:
case SIOCGIFFLAGS:
tprints("ifr_flags=");
printflags(iffflags, (unsigned short) ifr->ifr_flags, "IFF_???");
break;
case SIOCSIFMETRIC:
case SIOCGIFMETRIC:
tprintf("ifr_metric=%d", ifr->ifr_metric);
break;
case SIOCSIFMTU:
case SIOCGIFMTU:
tprintf("ifr_mtu=%d", ifr->ifr_mtu);
break;
case SIOCSIFSLAVE:
case SIOCGIFSLAVE:
tprints("ifr_slave=");
print_ifname(ifr->ifr_slave);
break;
case SIOCSIFTXQLEN:
case SIOCGIFTXQLEN:
tprintf("ifr_qlen=%d", ifr->ifr_qlen);
break;
case SIOCSIFMAP:
case SIOCGIFMAP:
tprintf("ifr_map={mem_start=%#" PRI_klx ", "
"mem_end=%#" PRI_klx ", base_addr=%#x, "
"irq=%u, dma=%u, port=%u}",
(kernel_ulong_t) ifr->ifr_map.mem_start,
(kernel_ulong_t) ifr->ifr_map.mem_end,
(unsigned) ifr->ifr_map.base_addr,
(unsigned) ifr->ifr_map.irq,
(unsigned) ifr->ifr_map.dma,
(unsigned) ifr->ifr_map.port);
break;
}
}
static unsigned int
print_ifc_len(int len)
{
const unsigned int n = (unsigned int) len / sizeof(struct_ifreq);
if (len < 0 || n * sizeof(struct_ifreq) != (unsigned int) len)
tprintf("%d", len);
else
tprintf("%u * sizeof(struct ifreq)", n);
return n;
}
static bool
print_ifconf_ifreq(struct tcb *tcp, void *elem_buf, size_t elem_size,
void *dummy)
{
struct_ifreq *ifr = elem_buf;
tprints("{ifr_name=");
print_ifname(ifr->ifr_name);
PRINT_FIELD_SOCKADDR(", ", *ifr, ifr_addr);
tprints("}");
return true;
}
/*
* There are two different modes of operation:
*
* - Get buffer size. In this case, the callee sets ifc_buf to NULL,
* and the kernel returns the buffer size in ifc_len.
* - Get actual data. In this case, the callee specifies the buffer address
* in ifc_buf and its size in ifc_len. The kernel fills the buffer with
* the data, and its amount is returned in ifc_len.
*
* Note that, technically, the whole struct ifconf is overwritten,
* so ifc_buf could be different on exit, but current ioctl handler
* implementation does not touch it.
*/
static int
decode_ifconf(struct tcb *const tcp, const kernel_ulong_t addr)
{
struct_ifconf *entering_ifc = NULL;
struct_ifconf *ifc =
entering(tcp) ? malloc(sizeof(*ifc)) : alloca(sizeof(*ifc));
if (exiting(tcp)) {
entering_ifc = get_tcb_priv_data(tcp);
if (!entering_ifc) {
error_msg("decode_ifconf: where is my ifconf?");
return 0;
}
}
if (!ifc || umove(tcp, addr, ifc) < 0) {
if (entering(tcp)) {
free(ifc);
tprints(", ");
printaddr(addr);
} else {
/*
* We failed to fetch the structure on exiting syscall,
* print whatever was fetched on entering syscall.
*/
if (!entering_ifc->ifc_buf)
print_ifc_len(entering_ifc->ifc_len);
tprints(", ifc_buf=");
printaddr(ptr_to_kulong(entering_ifc->ifc_buf));
tprints("}");
}
return RVAL_DECODED | 1;
}
if (entering(tcp)) {
tprints(", {ifc_len=");
if (ifc->ifc_buf)
print_ifc_len(ifc->ifc_len);
set_tcb_priv_data(tcp, ifc, free);
return 1;
}
/* exiting */
if (entering_ifc->ifc_buf && (entering_ifc->ifc_len != ifc->ifc_len))
tprints(" => ");
if (!entering_ifc->ifc_buf || (entering_ifc->ifc_len != ifc->ifc_len))
print_ifc_len(ifc->ifc_len);
tprints(", ifc_buf=");
if (!entering_ifc->ifc_buf || syserror(tcp)) {
printaddr(ptr_to_kulong(entering_ifc->ifc_buf));
if (entering_ifc->ifc_buf != ifc->ifc_buf) {
tprints(" => ");
printaddr(ptr_to_kulong(ifc->ifc_buf));
}
} else {
struct_ifreq ifr;
print_array(tcp, ptr_to_kulong(ifc->ifc_buf),
ifc->ifc_len / sizeof(struct_ifreq),
&ifr, sizeof(ifr),
umoven_or_printaddr, print_ifconf_ifreq, NULL);
}
tprints("}");
return RVAL_DECODED | 1;
}
MPERS_PRINTER_DECL(int, sock_ioctl,
struct tcb *tcp, const unsigned int code,
const kernel_ulong_t arg)
{
struct_ifreq ifr;
switch (code) {
case SIOCGIFCONF:
return decode_ifconf(tcp, arg);
#ifdef SIOCBRADDBR
case SIOCBRADDBR:
case SIOCBRDELBR:
tprints(", ");
printstr(tcp, arg);
break;
#endif
#ifdef FIOSETOWN
case FIOSETOWN:
#endif
#ifdef SIOCSPGRP
case SIOCSPGRP:
#endif
tprints(", ");
printnum_int(tcp, arg, "%d");
break;
#ifdef FIOGETOWN
case FIOGETOWN:
#endif
#ifdef SIOCGPGRP
case SIOCGPGRP:
#endif
#ifdef SIOCATMARK
case SIOCATMARK:
#endif
if (entering(tcp))
return 0;
tprints(", ");
printnum_int(tcp, arg, "%d");
break;
#ifdef SIOCBRADDIF
case SIOCBRADDIF:
#endif
#ifdef SIOCBRDELIF
case SIOCBRDELIF:
#endif
/* no arguments */
break;
case SIOCSIFNAME:
case SIOCSIFADDR:
case SIOCSIFDSTADDR:
case SIOCSIFBRDADDR:
case SIOCSIFNETMASK:
case SIOCSIFFLAGS:
case SIOCSIFMETRIC:
case SIOCSIFMTU:
case SIOCSIFSLAVE:
case SIOCSIFHWADDR:
case SIOCSIFTXQLEN:
case SIOCSIFMAP:
tprints(", ");
if (umove_or_printaddr(tcp, arg, &ifr))
break;
tprints("{ifr_name=");
print_ifname(ifr.ifr_name);
tprints(", ");
if (code == SIOCSIFNAME) {
tprints("ifr_newname=");
print_ifname(ifr.ifr_newname);
} else {
print_ifreq(tcp, code, arg, &ifr);
}
tprints("}");
break;
case SIOCGIFNAME:
case SIOCGIFINDEX:
case SIOCGIFADDR:
case SIOCGIFDSTADDR:
case SIOCGIFBRDADDR:
case SIOCGIFNETMASK:
case SIOCGIFFLAGS:
case SIOCGIFMETRIC:
case SIOCGIFMTU:
case SIOCGIFSLAVE:
case SIOCGIFHWADDR:
case SIOCGIFTXQLEN:
case SIOCGIFMAP:
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &ifr))
break;
if (SIOCGIFNAME == code) {
tprintf("{ifr_index=%d", ifr.ifr_ifindex);
} else {
tprints("{ifr_name=");
print_ifname(ifr.ifr_name);
}
return 1;
} else {
if (syserror(tcp)) {
tprints("}");
break;
}
tprints(", ");
if (umove(tcp, arg, &ifr) < 0) {
tprints("???}");
break;
}
if (SIOCGIFNAME == code) {
tprints("ifr_name=");
print_ifname(ifr.ifr_name);
} else {
print_ifreq(tcp, code, arg, &ifr);
}
tprints("}");
break;
}
default:
return RVAL_DECODED;
}
return RVAL_DECODED | 1;
}