strace/net.c

861 lines
18 KiB
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/*
* 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>
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* Copyright (c) 1999-2017 The strace developers.
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* 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 <sys/stat.h>
#include <sys/socket.h>
#include <sys/uio.h>
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#include <sys/un.h>
#include <netinet/in.h>
#ifdef HAVE_NETINET_TCP_H
# include <netinet/tcp.h>
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#endif
#ifdef HAVE_NETINET_UDP_H
# include <netinet/udp.h>
#endif
#ifdef HAVE_NETINET_SCTP_H
# include <netinet/sctp.h>
#endif
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#include <arpa/inet.h>
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#include <net/if.h>
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#include <asm/types.h>
#ifdef HAVE_NETIPX_IPX_H
# include <netipx/ipx.h>
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#else
# include <linux/ipx.h>
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#endif
decode extend getsockopt/setsockopt options Currently the code assumes the set of valid options between getsockopt and setsockopt are exactly the same and thus maintains one list. The kernel unfortunately does not do this -- it allows for different opts between the get and set functions. See the {g,s}et_opt{min,max} fields in the various netfilter subcores. To support this, extend the printxval function to take multiple sets of xlats as varargs. Then we add the new get/set lists, and pass them down in the net code when decoding things. A simple example is iptables; before: getsockopt(4, SOL_IP, 0x40 /* IP_??? */, ...) = 0 getsockopt(4, SOL_IP, 0x41 /* IP_??? */, ...) = 0 after: getsockopt(4, SOL_IP, IPT_SO_GET_INFO, ...) = 0 getsockopt(4, SOL_IP, IPT_SO_GET_ENTRIES, ...) = 0 If these were setsockopt calls, then 0x40 & 0x41 would be IPT_SO_SET_REPLACE & IPT_SO_SET_ADD_COUNTERS. * configure.ac: Check for netfilter headers. * defs.h (printxvals): New prototype. (printxval): Change to a define. * net.c: Include netfilter headers and new sockopts headers. (print_sockopt_fd_level_name): Add a is_getsockopt argument. Change SOL_IP and SOL_IPV6 decoding to use printxvals, and use is_getsockopt to pass more xlats down. (getsockopt): Call print_sockopt_fd_level_name with is_getsockopt as true. (setsockopt): Call print_sockopt_fd_level_name with is_getsockopt as false. * util.c (printxval): Rename to ... (printxvals): ... this. Rewrite to be varargs based. * xlat/getsockipoptions.in: New xlat list. * xlat/getsockipv6options.in, xlat/setsockipoptions.in, xlat/setsockipv6options.in: Likewise.
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#if defined(HAVE_LINUX_IP_VS_H)
# include <linux/ip_vs.h>
#endif
#include "netlink.h"
decode extend getsockopt/setsockopt options Currently the code assumes the set of valid options between getsockopt and setsockopt are exactly the same and thus maintains one list. The kernel unfortunately does not do this -- it allows for different opts between the get and set functions. See the {g,s}et_opt{min,max} fields in the various netfilter subcores. To support this, extend the printxval function to take multiple sets of xlats as varargs. Then we add the new get/set lists, and pass them down in the net code when decoding things. A simple example is iptables; before: getsockopt(4, SOL_IP, 0x40 /* IP_??? */, ...) = 0 getsockopt(4, SOL_IP, 0x41 /* IP_??? */, ...) = 0 after: getsockopt(4, SOL_IP, IPT_SO_GET_INFO, ...) = 0 getsockopt(4, SOL_IP, IPT_SO_GET_ENTRIES, ...) = 0 If these were setsockopt calls, then 0x40 & 0x41 would be IPT_SO_SET_REPLACE & IPT_SO_SET_ADD_COUNTERS. * configure.ac: Check for netfilter headers. * defs.h (printxvals): New prototype. (printxval): Change to a define. * net.c: Include netfilter headers and new sockopts headers. (print_sockopt_fd_level_name): Add a is_getsockopt argument. Change SOL_IP and SOL_IPV6 decoding to use printxvals, and use is_getsockopt to pass more xlats down. (getsockopt): Call print_sockopt_fd_level_name with is_getsockopt as true. (setsockopt): Call print_sockopt_fd_level_name with is_getsockopt as false. * util.c (printxval): Rename to ... (printxvals): ... this. Rewrite to be varargs based. * xlat/getsockipoptions.in: New xlat list. * xlat/getsockipv6options.in, xlat/setsockipoptions.in, xlat/setsockipv6options.in: Likewise.
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#if defined(HAVE_LINUX_NETFILTER_ARP_ARP_TABLES_H)
# include <linux/netfilter_arp/arp_tables.h>
#endif
#if defined(HAVE_LINUX_NETFILTER_BRIDGE_EBTABLES_H)
# include <linux/netfilter_bridge/ebtables.h>
#endif
#if defined(HAVE_LINUX_NETFILTER_IPV4_IP_TABLES_H)
# include <linux/netfilter_ipv4/ip_tables.h>
#endif
#if defined(HAVE_LINUX_NETFILTER_IPV6_IP6_TABLES_H)
# include <linux/netfilter_ipv6/ip6_tables.h>
#endif
#include <linux/if_packet.h>
#include <linux/icmp.h>
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#include "xlat/socktypes.h"
#include "xlat/sock_type_flags.h"
#ifndef SOCK_TYPE_MASK
# define SOCK_TYPE_MASK 0xf
#endif
#include "xlat/socketlayers.h"
#include "xlat/inet_protocols.h"
#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
# include <bluetooth/bluetooth.h>
# include "xlat/bt_protocols.h"
#endif
void
print_ifindex(unsigned int ifindex)
{
#ifdef HAVE_IF_INDEXTONAME
char buf[IFNAMSIZ + 1];
if (if_indextoname(ifindex, buf)) {
tprints("if_nametoindex(");
print_quoted_string(buf, sizeof(buf), QUOTE_0_TERMINATED);
tprints(")");
return;
}
#endif
tprintf("%u", ifindex);
}
static void
decode_sockbuf(struct tcb *const tcp, const int fd, const kernel_ulong_t addr,
const kernel_ulong_t addrlen)
{
switch (verbose(tcp) ? getfdproto(tcp, fd) : SOCK_PROTO_UNKNOWN) {
case SOCK_PROTO_NETLINK:
decode_netlink(tcp, fd, addr, addrlen);
break;
default:
printstrn(tcp, addr, addrlen);
}
}
/*
* low bits of the socket type define real socket type,
* other bits are socket type flags.
*/
static void
tprint_sock_type(unsigned int flags)
{
const char *str = xlookup(socktypes, flags & SOCK_TYPE_MASK);
if (str) {
tprints(str);
flags &= ~SOCK_TYPE_MASK;
if (!flags)
return;
tprints("|");
}
printflags(sock_type_flags, flags, "SOCK_???");
}
SYS_FUNC(socket)
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{
printxval(addrfams, tcp->u_arg[0], "AF_???");
tprints(", ");
tprint_sock_type(tcp->u_arg[1]);
tprints(", ");
switch (tcp->u_arg[0]) {
case AF_INET:
case AF_INET6:
printxval(inet_protocols, tcp->u_arg[2], "IPPROTO_???");
break;
case AF_NETLINK:
printxval(netlink_protocols, tcp->u_arg[2], "NETLINK_???");
break;
#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
case AF_BLUETOOTH:
printxval(bt_protocols, tcp->u_arg[2], "BTPROTO_???");
break;
#endif
default:
tprintf("%" PRI_klu, tcp->u_arg[2]);
break;
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}
return RVAL_DECODED | RVAL_FD;
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}
SYS_FUNC(bind)
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{
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
const int addrlen = tcp->u_arg[2];
decode_sockaddr(tcp, tcp->u_arg[1], addrlen);
tprintf(", %d", addrlen);
return RVAL_DECODED;
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}
SYS_FUNC(listen)
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{
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
tprintf("%" PRI_klu, tcp->u_arg[1]);
return RVAL_DECODED;
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}
static bool
fetch_socklen(struct tcb *const tcp, int *const plen,
const kernel_ulong_t sockaddr, const kernel_ulong_t socklen)
{
return verbose(tcp) && sockaddr && socklen
&& umove(tcp, socklen, plen) == 0;
}
static int
decode_sockname(struct tcb *tcp)
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{
int ulen, rlen;
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if (entering(tcp)) {
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
if (fetch_socklen(tcp, &ulen, tcp->u_arg[1], tcp->u_arg[2])) {
set_tcb_priv_ulong(tcp, ulen);
return 0;
} else {
printaddr(tcp->u_arg[1]);
tprints(", ");
printaddr(tcp->u_arg[2]);
return RVAL_DECODED;
}
}
ulen = get_tcb_priv_ulong(tcp);
if (syserror(tcp) || umove(tcp, tcp->u_arg[2], &rlen) < 0) {
printaddr(tcp->u_arg[1]);
tprintf(", [%d]", ulen);
} else {
decode_sockaddr(tcp, tcp->u_arg[1], ulen > rlen ? rlen : ulen);
if (ulen != rlen)
tprintf(", [%d->%d]", ulen, rlen);
else
tprintf(", [%d]", rlen);
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}
return RVAL_DECODED;
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}
SYS_FUNC(accept)
{
return decode_sockname(tcp) | RVAL_FD;
}
SYS_FUNC(accept4)
{
int rc = decode_sockname(tcp);
if (rc & RVAL_DECODED) {
tprints(", ");
printflags(sock_type_flags, tcp->u_arg[3], "SOCK_???");
}
return rc | RVAL_FD;
}
SYS_FUNC(send)
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{
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
decode_sockbuf(tcp, tcp->u_arg[0], tcp->u_arg[1], tcp->u_arg[2]);
tprintf(", %" PRI_klu ", ", tcp->u_arg[2]);
/* flags */
printflags(msg_flags, tcp->u_arg[3], "MSG_???");
return RVAL_DECODED;
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}
SYS_FUNC(sendto)
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{
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
decode_sockbuf(tcp, tcp->u_arg[0], tcp->u_arg[1], tcp->u_arg[2]);
tprintf(", %" PRI_klu ", ", tcp->u_arg[2]);
/* flags */
printflags(msg_flags, tcp->u_arg[3], "MSG_???");
/* to address */
const int addrlen = tcp->u_arg[5];
tprints(", ");
decode_sockaddr(tcp, tcp->u_arg[4], addrlen);
/* to length */
tprintf(", %d", addrlen);
return RVAL_DECODED;
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}
SYS_FUNC(recv)
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{
if (entering(tcp)) {
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
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} else {
if (syserror(tcp)) {
printaddr(tcp->u_arg[1]);
} else {
decode_sockbuf(tcp, tcp->u_arg[0], tcp->u_arg[1],
tcp->u_rval);
}
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tprintf(", %" PRI_klu ", ", tcp->u_arg[2]);
2005-05-31 Dmitry V. Levin <ldv@altlinux.org> * util.c (printxval): Change third argument from "char *" to "const char *". (printflags): Add third argument, "const char *", with similar meaning to the third argument of printxval(). * defs.h (printxval): Change third argument from "char *" to "const char *". (printflags): Add third argument. * bjm.c (sys_query_module) [LINUX]: Pass third argument to printflags(). * desc.c (sys_fcntl): Likewise. (sys_flock) [LOCK_SH]: Likewise. (print_epoll_event) [HAVE_SYS_EPOLL_H]: Likewise. * file.c (sys_open): Likewise. (solaris_open) [LINUXSPARC]: Likewise. (sys_access): Likewise. (sys_chflags, sys_fchflags) [FREEBSD]: Likewise. (realprintstat) [HAVE_LONG_LONG_OFF_T && HAVE_STRUCT_STAT_ST_FLAGS]: Likewise. (printstat64) [HAVE_STAT64 && HAVE_STRUCT_STAT_ST_FLAGS]: Likewise. (sys_setxattr, sys_fsetxattr): Likewise. * ipc.c (sys_msgget, sys_msgsnd, sys_msgrcv, sys_semget, sys_shmget, sys_shmat) [LINUX || SUNOS4 || FREEBSD]: Likewise. (sys_mq_open) [LINUX]: Likewise. (printmqattr) [HAVE_MQUEUE_H]: Likewise. * mem.c (print_mmap) [!HAVE_LONG_LONG_OFF_T]: Likewise. (sys_mmap64) [_LFS64_LARGEFILE || HAVE_LONG_LONG_OFF_T]: Likewise. (sys_mprotect): Likewise. (sys_mremap, sys_madvise, sys_mlockall) [LINUX]: Likewise. (sys_msync) [MS_ASYNC]: Likewise. (sys_mctl) [MC_SYNC]: Likewise. (sys_remap_file_pages, sys_mbind, sys_get_mempolicy) [LINUX]: Likewise. * net.c (printmsghdr) [HAVE_STRUCT_MSGHDR_MSG_CONTROL]: Likewise. (sys_send, sys_sendto): Likewise. (sys_sendmsg) [HAVE_SENDMSG]: Likewise. (sys_recv, sys_recvfrom): Likewise. (sys_recvmsg) [HAVE_SENDMSG]: Likewise. (printicmpfilter) [ICMP_FILTER]: Likewise. * proc.c (proc_ioctl) [SVR4 && !HAVE_MP_PROCFS || FREEBSD]: Likewise. * process.c (sys_clone) [LINUX]: Likewise. (printwaitn): Likewise. (sys_waitid) [SVR4 || LINUX]: Likewise. * signal.c (sys_sigvec) [SUNOS4 || FREEBSD]: Likewise. (sys_sigaction): Likewise. (printcontext) [SVR4]: Likewise. (print_stack_t) [LINUX) || FREEBSD]: Likewise. (sys_rt_sigaction) [LINUX]: Likewise. * sock.c (sock_ioctl) [LINUX]: Likewise. * stream.c (sys_putmsg, sys_getmsg): Likewise. (sys_putpmsg) [SYS_putpmsg]: Likewise. (sys_getpmsg) [SYS_getpmsg]: Likewise. (sys_poll): Likewise. (print_transport_message) [TI_BIND]: Likewise. (stream_ioctl): Likewise. * system.c (sys_mount, sys_reboot): Likewise. (sys_cacheflush) [LINUX && M68K]: Likewise. (sys_capget, sys_capset) [SYS_capget]: Likewise. * term.c (term_ioctl) [TIOCMGET]: Likewise. * time.c (sys_clock_nanosleep, sys_timer_settime) [LINUX]: Likewise. Fixes RH#159310.
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printflags(msg_flags, tcp->u_arg[3], "MSG_???");
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}
return 0;
}
SYS_FUNC(recvfrom)
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{
int ulen, rlen;
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if (entering(tcp)) {
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
if (fetch_socklen(tcp, &ulen, tcp->u_arg[4], tcp->u_arg[5])) {
set_tcb_priv_ulong(tcp, ulen);
}
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} else {
/* buf */
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if (syserror(tcp)) {
printaddr(tcp->u_arg[1]);
} else {
decode_sockbuf(tcp, tcp->u_arg[0], tcp->u_arg[1],
tcp->u_rval);
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}
/* size */
tprintf(", %" PRI_klu ", ", tcp->u_arg[2]);
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/* flags */
2005-05-31 Dmitry V. Levin <ldv@altlinux.org> * util.c (printxval): Change third argument from "char *" to "const char *". (printflags): Add third argument, "const char *", with similar meaning to the third argument of printxval(). * defs.h (printxval): Change third argument from "char *" to "const char *". (printflags): Add third argument. * bjm.c (sys_query_module) [LINUX]: Pass third argument to printflags(). * desc.c (sys_fcntl): Likewise. (sys_flock) [LOCK_SH]: Likewise. (print_epoll_event) [HAVE_SYS_EPOLL_H]: Likewise. * file.c (sys_open): Likewise. (solaris_open) [LINUXSPARC]: Likewise. (sys_access): Likewise. (sys_chflags, sys_fchflags) [FREEBSD]: Likewise. (realprintstat) [HAVE_LONG_LONG_OFF_T && HAVE_STRUCT_STAT_ST_FLAGS]: Likewise. (printstat64) [HAVE_STAT64 && HAVE_STRUCT_STAT_ST_FLAGS]: Likewise. (sys_setxattr, sys_fsetxattr): Likewise. * ipc.c (sys_msgget, sys_msgsnd, sys_msgrcv, sys_semget, sys_shmget, sys_shmat) [LINUX || SUNOS4 || FREEBSD]: Likewise. (sys_mq_open) [LINUX]: Likewise. (printmqattr) [HAVE_MQUEUE_H]: Likewise. * mem.c (print_mmap) [!HAVE_LONG_LONG_OFF_T]: Likewise. (sys_mmap64) [_LFS64_LARGEFILE || HAVE_LONG_LONG_OFF_T]: Likewise. (sys_mprotect): Likewise. (sys_mremap, sys_madvise, sys_mlockall) [LINUX]: Likewise. (sys_msync) [MS_ASYNC]: Likewise. (sys_mctl) [MC_SYNC]: Likewise. (sys_remap_file_pages, sys_mbind, sys_get_mempolicy) [LINUX]: Likewise. * net.c (printmsghdr) [HAVE_STRUCT_MSGHDR_MSG_CONTROL]: Likewise. (sys_send, sys_sendto): Likewise. (sys_sendmsg) [HAVE_SENDMSG]: Likewise. (sys_recv, sys_recvfrom): Likewise. (sys_recvmsg) [HAVE_SENDMSG]: Likewise. (printicmpfilter) [ICMP_FILTER]: Likewise. * proc.c (proc_ioctl) [SVR4 && !HAVE_MP_PROCFS || FREEBSD]: Likewise. * process.c (sys_clone) [LINUX]: Likewise. (printwaitn): Likewise. (sys_waitid) [SVR4 || LINUX]: Likewise. * signal.c (sys_sigvec) [SUNOS4 || FREEBSD]: Likewise. (sys_sigaction): Likewise. (printcontext) [SVR4]: Likewise. (print_stack_t) [LINUX) || FREEBSD]: Likewise. (sys_rt_sigaction) [LINUX]: Likewise. * sock.c (sock_ioctl) [LINUX]: Likewise. * stream.c (sys_putmsg, sys_getmsg): Likewise. (sys_putpmsg) [SYS_putpmsg]: Likewise. (sys_getpmsg) [SYS_getpmsg]: Likewise. (sys_poll): Likewise. (print_transport_message) [TI_BIND]: Likewise. (stream_ioctl): Likewise. * system.c (sys_mount, sys_reboot): Likewise. (sys_cacheflush) [LINUX && M68K]: Likewise. (sys_capget, sys_capset) [SYS_capget]: Likewise. * term.c (term_ioctl) [TIOCMGET]: Likewise. * time.c (sys_clock_nanosleep, sys_timer_settime) [LINUX]: Likewise. Fixes RH#159310.
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printflags(msg_flags, tcp->u_arg[3], "MSG_???");
tprints(", ");
ulen = get_tcb_priv_ulong(tcp);
if (!fetch_socklen(tcp, &rlen, tcp->u_arg[4], tcp->u_arg[5])) {
/* from address */
printaddr(tcp->u_arg[4]);
tprints(", ");
/* from length */
printaddr(tcp->u_arg[5]);
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return 0;
}
if (syserror(tcp)) {
/* from address */
printaddr(tcp->u_arg[4]);
/* from length */
tprintf(", [%d]", ulen);
return 0;
}
/* from address */
decode_sockaddr(tcp, tcp->u_arg[4], ulen > rlen ? rlen : ulen);
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/* from length */
if (ulen != rlen)
tprintf(", [%d->%d]", ulen, rlen);
else
tprintf(", [%d]", rlen);
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}
return 0;
}
#include "xlat/shutdown_modes.h"
SYS_FUNC(shutdown)
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{
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
printxval(shutdown_modes, tcp->u_arg[1], "SHUT_???");
return RVAL_DECODED;
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}
SYS_FUNC(getsockname)
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{
return decode_sockname(tcp);
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}
static void
printpair_fd(struct tcb *tcp, const int i0, const int i1)
{
tprints("[");
printfd(tcp, i0);
tprints(", ");
printfd(tcp, i1);
tprints("]");
}
static void
decode_pair_fd(struct tcb *const tcp, const kernel_ulong_t addr)
{
int pair[2];
if (umove_or_printaddr(tcp, addr, &pair))
return;
printpair_fd(tcp, pair[0], pair[1]);
}
static int
do_pipe(struct tcb *tcp, int flags_arg)
{
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if (exiting(tcp)) {
decode_pair_fd(tcp, tcp->u_arg[0]);
if (flags_arg >= 0) {
tprints(", ");
printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
}
}
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return 0;
}
SYS_FUNC(pipe)
{
#ifdef HAVE_GETRVAL2
if (exiting(tcp) && !syserror(tcp))
printpair_fd(tcp, tcp->u_rval, getrval2(tcp));
return 0;
#else
return do_pipe(tcp, -1);
#endif
}
SYS_FUNC(pipe2)
{
return do_pipe(tcp, 1);
}
SYS_FUNC(socketpair)
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{
if (entering(tcp)) {
printxval(addrfams, tcp->u_arg[0], "AF_???");
tprints(", ");
tprint_sock_type(tcp->u_arg[1]);
tprintf(", %" PRI_klu, tcp->u_arg[2]);
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} else {
tprints(", ");
decode_pair_fd(tcp, tcp->u_arg[3]);
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}
return 0;
}
#include "xlat/sockoptions.h"
#include "xlat/sockipoptions.h"
decode extend getsockopt/setsockopt options Currently the code assumes the set of valid options between getsockopt and setsockopt are exactly the same and thus maintains one list. The kernel unfortunately does not do this -- it allows for different opts between the get and set functions. See the {g,s}et_opt{min,max} fields in the various netfilter subcores. To support this, extend the printxval function to take multiple sets of xlats as varargs. Then we add the new get/set lists, and pass them down in the net code when decoding things. A simple example is iptables; before: getsockopt(4, SOL_IP, 0x40 /* IP_??? */, ...) = 0 getsockopt(4, SOL_IP, 0x41 /* IP_??? */, ...) = 0 after: getsockopt(4, SOL_IP, IPT_SO_GET_INFO, ...) = 0 getsockopt(4, SOL_IP, IPT_SO_GET_ENTRIES, ...) = 0 If these were setsockopt calls, then 0x40 & 0x41 would be IPT_SO_SET_REPLACE & IPT_SO_SET_ADD_COUNTERS. * configure.ac: Check for netfilter headers. * defs.h (printxvals): New prototype. (printxval): Change to a define. * net.c: Include netfilter headers and new sockopts headers. (print_sockopt_fd_level_name): Add a is_getsockopt argument. Change SOL_IP and SOL_IPV6 decoding to use printxvals, and use is_getsockopt to pass more xlats down. (getsockopt): Call print_sockopt_fd_level_name with is_getsockopt as true. (setsockopt): Call print_sockopt_fd_level_name with is_getsockopt as false. * util.c (printxval): Rename to ... (printxvals): ... this. Rewrite to be varargs based. * xlat/getsockipoptions.in: New xlat list. * xlat/getsockipv6options.in, xlat/setsockipoptions.in, xlat/setsockipv6options.in: Likewise.
2015-08-19 20:29:27 +03:00
#include "xlat/getsockipoptions.h"
#include "xlat/setsockipoptions.h"
#include "xlat/sockipv6options.h"
decode extend getsockopt/setsockopt options Currently the code assumes the set of valid options between getsockopt and setsockopt are exactly the same and thus maintains one list. The kernel unfortunately does not do this -- it allows for different opts between the get and set functions. See the {g,s}et_opt{min,max} fields in the various netfilter subcores. To support this, extend the printxval function to take multiple sets of xlats as varargs. Then we add the new get/set lists, and pass them down in the net code when decoding things. A simple example is iptables; before: getsockopt(4, SOL_IP, 0x40 /* IP_??? */, ...) = 0 getsockopt(4, SOL_IP, 0x41 /* IP_??? */, ...) = 0 after: getsockopt(4, SOL_IP, IPT_SO_GET_INFO, ...) = 0 getsockopt(4, SOL_IP, IPT_SO_GET_ENTRIES, ...) = 0 If these were setsockopt calls, then 0x40 & 0x41 would be IPT_SO_SET_REPLACE & IPT_SO_SET_ADD_COUNTERS. * configure.ac: Check for netfilter headers. * defs.h (printxvals): New prototype. (printxval): Change to a define. * net.c: Include netfilter headers and new sockopts headers. (print_sockopt_fd_level_name): Add a is_getsockopt argument. Change SOL_IP and SOL_IPV6 decoding to use printxvals, and use is_getsockopt to pass more xlats down. (getsockopt): Call print_sockopt_fd_level_name with is_getsockopt as true. (setsockopt): Call print_sockopt_fd_level_name with is_getsockopt as false. * util.c (printxval): Rename to ... (printxvals): ... this. Rewrite to be varargs based. * xlat/getsockipoptions.in: New xlat list. * xlat/getsockipv6options.in, xlat/setsockipoptions.in, xlat/setsockipv6options.in: Likewise.
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#include "xlat/getsockipv6options.h"
#include "xlat/setsockipv6options.h"
#include "xlat/sockipxoptions.h"
#include "xlat/sockrawoptions.h"
#include "xlat/sockpacketoptions.h"
#include "xlat/socksctpoptions.h"
#include "xlat/socktcpoptions.h"
static void
print_sockopt_fd_level_name(struct tcb *tcp, int fd, unsigned int level,
unsigned int name, bool is_getsockopt)
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{
printfd(tcp, fd);
tprints(", ");
printxval(socketlayers, level, "SOL_??");
tprints(", ");
switch (level) {
case SOL_SOCKET:
printxval(sockoptions, name, "SO_???");
break;
case SOL_IP:
decode extend getsockopt/setsockopt options Currently the code assumes the set of valid options between getsockopt and setsockopt are exactly the same and thus maintains one list. The kernel unfortunately does not do this -- it allows for different opts between the get and set functions. See the {g,s}et_opt{min,max} fields in the various netfilter subcores. To support this, extend the printxval function to take multiple sets of xlats as varargs. Then we add the new get/set lists, and pass them down in the net code when decoding things. A simple example is iptables; before: getsockopt(4, SOL_IP, 0x40 /* IP_??? */, ...) = 0 getsockopt(4, SOL_IP, 0x41 /* IP_??? */, ...) = 0 after: getsockopt(4, SOL_IP, IPT_SO_GET_INFO, ...) = 0 getsockopt(4, SOL_IP, IPT_SO_GET_ENTRIES, ...) = 0 If these were setsockopt calls, then 0x40 & 0x41 would be IPT_SO_SET_REPLACE & IPT_SO_SET_ADD_COUNTERS. * configure.ac: Check for netfilter headers. * defs.h (printxvals): New prototype. (printxval): Change to a define. * net.c: Include netfilter headers and new sockopts headers. (print_sockopt_fd_level_name): Add a is_getsockopt argument. Change SOL_IP and SOL_IPV6 decoding to use printxvals, and use is_getsockopt to pass more xlats down. (getsockopt): Call print_sockopt_fd_level_name with is_getsockopt as true. (setsockopt): Call print_sockopt_fd_level_name with is_getsockopt as false. * util.c (printxval): Rename to ... (printxvals): ... this. Rewrite to be varargs based. * xlat/getsockipoptions.in: New xlat list. * xlat/getsockipv6options.in, xlat/setsockipoptions.in, xlat/setsockipv6options.in: Likewise.
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printxvals(name, "IP_???", sockipoptions,
is_getsockopt ? getsockipoptions : setsockipoptions, NULL);
break;
case SOL_IPV6:
decode extend getsockopt/setsockopt options Currently the code assumes the set of valid options between getsockopt and setsockopt are exactly the same and thus maintains one list. The kernel unfortunately does not do this -- it allows for different opts between the get and set functions. See the {g,s}et_opt{min,max} fields in the various netfilter subcores. To support this, extend the printxval function to take multiple sets of xlats as varargs. Then we add the new get/set lists, and pass them down in the net code when decoding things. A simple example is iptables; before: getsockopt(4, SOL_IP, 0x40 /* IP_??? */, ...) = 0 getsockopt(4, SOL_IP, 0x41 /* IP_??? */, ...) = 0 after: getsockopt(4, SOL_IP, IPT_SO_GET_INFO, ...) = 0 getsockopt(4, SOL_IP, IPT_SO_GET_ENTRIES, ...) = 0 If these were setsockopt calls, then 0x40 & 0x41 would be IPT_SO_SET_REPLACE & IPT_SO_SET_ADD_COUNTERS. * configure.ac: Check for netfilter headers. * defs.h (printxvals): New prototype. (printxval): Change to a define. * net.c: Include netfilter headers and new sockopts headers. (print_sockopt_fd_level_name): Add a is_getsockopt argument. Change SOL_IP and SOL_IPV6 decoding to use printxvals, and use is_getsockopt to pass more xlats down. (getsockopt): Call print_sockopt_fd_level_name with is_getsockopt as true. (setsockopt): Call print_sockopt_fd_level_name with is_getsockopt as false. * util.c (printxval): Rename to ... (printxvals): ... this. Rewrite to be varargs based. * xlat/getsockipoptions.in: New xlat list. * xlat/getsockipv6options.in, xlat/setsockipoptions.in, xlat/setsockipv6options.in: Likewise.
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printxvals(name, "IPV6_???", sockipv6options,
is_getsockopt ? getsockipv6options : setsockipv6options, NULL);
break;
case SOL_IPX:
printxval(sockipxoptions, name, "IPX_???");
break;
case SOL_PACKET:
printxval(sockpacketoptions, name, "PACKET_???");
break;
case SOL_TCP:
printxval(socktcpoptions, name, "TCP_???");
break;
case SOL_SCTP:
printxval(socksctpoptions, name, "SCTP_???");
break;
case SOL_RAW:
printxval(sockrawoptions, name, "RAW_???");
break;
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/* Other SOL_* protocol levels still need work. */
default:
tprintf("%u", name);
}
tprints(", ");
}
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static void
print_linger(struct tcb *const tcp, const kernel_ulong_t addr, const int len)
{
struct linger linger;
if (len != sizeof(linger) ||
umove(tcp, addr, &linger) < 0) {
printaddr(addr);
return;
}
tprintf("{onoff=%d, linger=%d}",
linger.l_onoff,
linger.l_linger);
}
#ifdef SO_PEERCRED
static void
print_ucred(struct tcb *const tcp, const kernel_ulong_t addr, const int len)
{
struct ucred uc;
if (len != sizeof(uc) ||
umove(tcp, addr, &uc) < 0) {
printaddr(addr);
} else {
tprintf("{pid=%u, uid=%u, gid=%u}",
(unsigned) uc.pid,
(unsigned) uc.uid,
(unsigned) uc.gid);
}
}
#endif /* SO_PEERCRED */
#ifdef PACKET_STATISTICS
static void
print_tpacket_stats(struct tcb *const tcp, const kernel_ulong_t addr,
const int len)
{
struct tpacket_stats stats;
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if (len != sizeof(stats) ||
umove(tcp, addr, &stats) < 0) {
printaddr(addr);
} else {
tprintf("{packets=%u, drops=%u}",
stats.tp_packets,
stats.tp_drops);
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}
}
#endif /* PACKET_STATISTICS */
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#include "xlat/icmpfilterflags.h"
static void
print_icmp_filter(struct tcb *const tcp, const kernel_ulong_t addr, int len)
{
struct icmp_filter filter = {};
if (len > (int) sizeof(filter))
len = sizeof(filter);
else if (len <= 0) {
printaddr(addr);
return;
}
if (umoven_or_printaddr(tcp, addr, len, &filter))
return;
tprints("~(");
2005-05-31 Dmitry V. Levin <ldv@altlinux.org> * util.c (printxval): Change third argument from "char *" to "const char *". (printflags): Add third argument, "const char *", with similar meaning to the third argument of printxval(). * defs.h (printxval): Change third argument from "char *" to "const char *". (printflags): Add third argument. * bjm.c (sys_query_module) [LINUX]: Pass third argument to printflags(). * desc.c (sys_fcntl): Likewise. (sys_flock) [LOCK_SH]: Likewise. (print_epoll_event) [HAVE_SYS_EPOLL_H]: Likewise. * file.c (sys_open): Likewise. (solaris_open) [LINUXSPARC]: Likewise. (sys_access): Likewise. (sys_chflags, sys_fchflags) [FREEBSD]: Likewise. (realprintstat) [HAVE_LONG_LONG_OFF_T && HAVE_STRUCT_STAT_ST_FLAGS]: Likewise. (printstat64) [HAVE_STAT64 && HAVE_STRUCT_STAT_ST_FLAGS]: Likewise. (sys_setxattr, sys_fsetxattr): Likewise. * ipc.c (sys_msgget, sys_msgsnd, sys_msgrcv, sys_semget, sys_shmget, sys_shmat) [LINUX || SUNOS4 || FREEBSD]: Likewise. (sys_mq_open) [LINUX]: Likewise. (printmqattr) [HAVE_MQUEUE_H]: Likewise. * mem.c (print_mmap) [!HAVE_LONG_LONG_OFF_T]: Likewise. (sys_mmap64) [_LFS64_LARGEFILE || HAVE_LONG_LONG_OFF_T]: Likewise. (sys_mprotect): Likewise. (sys_mremap, sys_madvise, sys_mlockall) [LINUX]: Likewise. (sys_msync) [MS_ASYNC]: Likewise. (sys_mctl) [MC_SYNC]: Likewise. (sys_remap_file_pages, sys_mbind, sys_get_mempolicy) [LINUX]: Likewise. * net.c (printmsghdr) [HAVE_STRUCT_MSGHDR_MSG_CONTROL]: Likewise. (sys_send, sys_sendto): Likewise. (sys_sendmsg) [HAVE_SENDMSG]: Likewise. (sys_recv, sys_recvfrom): Likewise. (sys_recvmsg) [HAVE_SENDMSG]: Likewise. (printicmpfilter) [ICMP_FILTER]: Likewise. * proc.c (proc_ioctl) [SVR4 && !HAVE_MP_PROCFS || FREEBSD]: Likewise. * process.c (sys_clone) [LINUX]: Likewise. (printwaitn): Likewise. (sys_waitid) [SVR4 || LINUX]: Likewise. * signal.c (sys_sigvec) [SUNOS4 || FREEBSD]: Likewise. (sys_sigaction): Likewise. (printcontext) [SVR4]: Likewise. (print_stack_t) [LINUX) || FREEBSD]: Likewise. (sys_rt_sigaction) [LINUX]: Likewise. * sock.c (sock_ioctl) [LINUX]: Likewise. * stream.c (sys_putmsg, sys_getmsg): Likewise. (sys_putpmsg) [SYS_putpmsg]: Likewise. (sys_getpmsg) [SYS_getpmsg]: Likewise. (sys_poll): Likewise. (print_transport_message) [TI_BIND]: Likewise. (stream_ioctl): Likewise. * system.c (sys_mount, sys_reboot): Likewise. (sys_cacheflush) [LINUX && M68K]: Likewise. (sys_capget, sys_capset) [SYS_capget]: Likewise. * term.c (term_ioctl) [TIOCMGET]: Likewise. * time.c (sys_clock_nanosleep, sys_timer_settime) [LINUX]: Likewise. Fixes RH#159310.
2005-06-01 23:02:36 +04:00
printflags(icmpfilterflags, ~filter.data, "ICMP_???");
tprints(")");
}
static void
print_getsockopt(struct tcb *const tcp, const unsigned int level,
const unsigned int name, const kernel_ulong_t addr,
const int len)
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{
if (addr && verbose(tcp))
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switch (level) {
case SOL_SOCKET:
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switch (name) {
case SO_LINGER:
print_linger(tcp, addr, len);
return;
#ifdef SO_PEERCRED
case SO_PEERCRED:
print_ucred(tcp, addr, len);
return;
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#endif
}
break;
case SOL_PACKET:
switch (name) {
#ifdef PACKET_STATISTICS
case PACKET_STATISTICS:
print_tpacket_stats(tcp, addr, len);
return;
#endif
}
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break;
case SOL_RAW:
switch (name) {
case ICMP_FILTER:
print_icmp_filter(tcp, addr, len);
return;
}
break;
}
/* default arg printing */
if (verbose(tcp)) {
if (len == sizeof(int)) {
printnum_int(tcp, addr, "%d");
} else {
printstrn(tcp, addr, len);
}
} else {
printaddr(addr);
}
}
SYS_FUNC(getsockopt)
{
int ulen, rlen;
if (entering(tcp)) {
print_sockopt_fd_level_name(tcp, tcp->u_arg[0],
decode extend getsockopt/setsockopt options Currently the code assumes the set of valid options between getsockopt and setsockopt are exactly the same and thus maintains one list. The kernel unfortunately does not do this -- it allows for different opts between the get and set functions. See the {g,s}et_opt{min,max} fields in the various netfilter subcores. To support this, extend the printxval function to take multiple sets of xlats as varargs. Then we add the new get/set lists, and pass them down in the net code when decoding things. A simple example is iptables; before: getsockopt(4, SOL_IP, 0x40 /* IP_??? */, ...) = 0 getsockopt(4, SOL_IP, 0x41 /* IP_??? */, ...) = 0 after: getsockopt(4, SOL_IP, IPT_SO_GET_INFO, ...) = 0 getsockopt(4, SOL_IP, IPT_SO_GET_ENTRIES, ...) = 0 If these were setsockopt calls, then 0x40 & 0x41 would be IPT_SO_SET_REPLACE & IPT_SO_SET_ADD_COUNTERS. * configure.ac: Check for netfilter headers. * defs.h (printxvals): New prototype. (printxval): Change to a define. * net.c: Include netfilter headers and new sockopts headers. (print_sockopt_fd_level_name): Add a is_getsockopt argument. Change SOL_IP and SOL_IPV6 decoding to use printxvals, and use is_getsockopt to pass more xlats down. (getsockopt): Call print_sockopt_fd_level_name with is_getsockopt as true. (setsockopt): Call print_sockopt_fd_level_name with is_getsockopt as false. * util.c (printxval): Rename to ... (printxvals): ... this. Rewrite to be varargs based. * xlat/getsockipoptions.in: New xlat list. * xlat/getsockipv6options.in, xlat/setsockipoptions.in, xlat/setsockipv6options.in: Likewise.
2015-08-19 20:29:27 +03:00
tcp->u_arg[1], tcp->u_arg[2], true);
if (verbose(tcp) && tcp->u_arg[4]
&& umove(tcp, tcp->u_arg[4], &ulen) == 0) {
set_tcb_priv_ulong(tcp, ulen);
return 0;
} else {
printaddr(tcp->u_arg[3]);
tprints(", ");
printaddr(tcp->u_arg[4]);
return RVAL_DECODED;
}
} else {
ulen = get_tcb_priv_ulong(tcp);
if (syserror(tcp) || umove(tcp, tcp->u_arg[4], &rlen) < 0) {
printaddr(tcp->u_arg[3]);
tprintf(", [%d]", ulen);
} else {
print_getsockopt(tcp, tcp->u_arg[1], tcp->u_arg[2],
tcp->u_arg[3], rlen);
if (ulen != rlen)
tprintf(", [%d->%d]", ulen, rlen);
else
tprintf(", [%d]", rlen);
}
}
return 0;
}
#ifdef IP_ADD_MEMBERSHIP
static void
print_mreq(struct tcb *const tcp, const kernel_ulong_t addr,
const unsigned int len)
{
struct ip_mreq mreq;
if (len < sizeof(mreq)) {
printstrn(tcp, addr, len);
return;
}
if (umove_or_printaddr(tcp, addr, &mreq))
return;
tprintf("{imr_multiaddr=inet_addr(\"%s\")",
inet_ntoa(mreq.imr_multiaddr));
tprintf(", imr_interface=inet_addr(\"%s\")}",
inet_ntoa(mreq.imr_interface));
}
#endif /* IP_ADD_MEMBERSHIP */
#ifdef IPV6_ADD_MEMBERSHIP
static void
print_mreq6(struct tcb *const tcp, const kernel_ulong_t addr,
const unsigned int len)
{
struct ipv6_mreq mreq;
if (len < sizeof(mreq)) {
printstrn(tcp, addr, len);
return;
}
if (umove_or_printaddr(tcp, addr, &mreq))
return;
tprints("{");
print_inet_addr(AF_INET6, &mreq.ipv6mr_multiaddr,
sizeof(mreq.ipv6mr_multiaddr), "ipv6mr_multiaddr");
tprints(", ipv6mr_interface=");
print_ifindex(mreq.ipv6mr_interface);
tprints("}");
}
#endif /* IPV6_ADD_MEMBERSHIP */
#ifdef MCAST_JOIN_GROUP
static void
print_group_req(struct tcb *const tcp, const kernel_ulong_t addr, const int len)
{
struct group_req greq;
if (len != sizeof(greq) ||
umove(tcp, addr, &greq) < 0) {
printaddr(addr);
return;
}
tprintf("{gr_interface=%u, gr_group=", greq.gr_interface);
print_sockaddr(tcp, &greq.gr_group, sizeof(greq.gr_group));
tprints("}");
}
#endif /* MCAST_JOIN_GROUP */
#ifdef PACKET_RX_RING
static void
print_tpacket_req(struct tcb *const tcp, const kernel_ulong_t addr, const int len)
{
struct tpacket_req req;
if (len != sizeof(req) ||
umove(tcp, addr, &req) < 0) {
printaddr(addr);
} else {
tprintf("{block_size=%u, block_nr=%u, "
"frame_size=%u, frame_nr=%u}",
req.tp_block_size,
req.tp_block_nr,
req.tp_frame_size,
req.tp_frame_nr);
}
}
#endif /* PACKET_RX_RING */
#ifdef PACKET_ADD_MEMBERSHIP
# include "xlat/packet_mreq_type.h"
static void
print_packet_mreq(struct tcb *const tcp, const kernel_ulong_t addr, const int len)
{
struct packet_mreq mreq;
if (len != sizeof(mreq) ||
umove(tcp, addr, &mreq) < 0) {
printaddr(addr);
} else {
unsigned int i;
tprintf("{mr_ifindex=%u, mr_type=", mreq.mr_ifindex);
printxval(packet_mreq_type, mreq.mr_type, "PACKET_MR_???");
tprintf(", mr_alen=%u, mr_address=", mreq.mr_alen);
if (mreq.mr_alen > ARRAY_SIZE(mreq.mr_address))
mreq.mr_alen = ARRAY_SIZE(mreq.mr_address);
for (i = 0; i < mreq.mr_alen; ++i)
tprintf("%02x", mreq.mr_address[i]);
tprints("}");
}
}
#endif /* PACKET_ADD_MEMBERSHIP */
static void
print_setsockopt(struct tcb *const tcp, const unsigned int level,
const unsigned int name, const kernel_ulong_t addr,
const int len)
{
if (addr && verbose(tcp))
switch (level) {
case SOL_SOCKET:
switch (name) {
case SO_LINGER:
print_linger(tcp, addr, len);
return;
}
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break;
case SOL_IP:
switch (name) {
#ifdef IP_ADD_MEMBERSHIP
case IP_ADD_MEMBERSHIP:
case IP_DROP_MEMBERSHIP:
print_mreq(tcp, addr, len);
return;
#endif /* IP_ADD_MEMBERSHIP */
#ifdef MCAST_JOIN_GROUP
case MCAST_JOIN_GROUP:
case MCAST_LEAVE_GROUP:
print_group_req(tcp, addr, len);
return;
#endif /* MCAST_JOIN_GROUP */
}
break;
case SOL_IPV6:
switch (name) {
#ifdef IPV6_ADD_MEMBERSHIP
case IPV6_ADD_MEMBERSHIP:
case IPV6_DROP_MEMBERSHIP:
# ifdef IPV6_JOIN_ANYCAST
case IPV6_JOIN_ANYCAST:
# endif
# ifdef IPV6_LEAVE_ANYCAST
case IPV6_LEAVE_ANYCAST:
# endif
print_mreq6(tcp, addr, len);
return;
#endif /* IPV6_ADD_MEMBERSHIP */
}
break;
case SOL_PACKET:
switch (name) {
#ifdef PACKET_RX_RING
case PACKET_RX_RING:
# ifdef PACKET_TX_RING
case PACKET_TX_RING:
# endif
print_tpacket_req(tcp, addr, len);
return;
#endif /* PACKET_RX_RING */
#ifdef PACKET_ADD_MEMBERSHIP
case PACKET_ADD_MEMBERSHIP:
case PACKET_DROP_MEMBERSHIP:
print_packet_mreq(tcp, addr, len);
return;
#endif /* PACKET_ADD_MEMBERSHIP */
}
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break;
case SOL_RAW:
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switch (name) {
case ICMP_FILTER:
print_icmp_filter(tcp, addr, len);
return;
2002-05-23 15:48:58 +04:00
}
break;
}
2002-05-22 19:46:49 +04:00
2002-05-23 15:48:58 +04:00
/* default arg printing */
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if (verbose(tcp)) {
if (len == sizeof(int)) {
printnum_int(tcp, addr, "%d");
} else {
printstrn(tcp, addr, len);
}
} else {
printaddr(addr);
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}
}
SYS_FUNC(setsockopt)
2002-05-23 15:48:58 +04:00
{
print_sockopt_fd_level_name(tcp, tcp->u_arg[0],
decode extend getsockopt/setsockopt options Currently the code assumes the set of valid options between getsockopt and setsockopt are exactly the same and thus maintains one list. The kernel unfortunately does not do this -- it allows for different opts between the get and set functions. See the {g,s}et_opt{min,max} fields in the various netfilter subcores. To support this, extend the printxval function to take multiple sets of xlats as varargs. Then we add the new get/set lists, and pass them down in the net code when decoding things. A simple example is iptables; before: getsockopt(4, SOL_IP, 0x40 /* IP_??? */, ...) = 0 getsockopt(4, SOL_IP, 0x41 /* IP_??? */, ...) = 0 after: getsockopt(4, SOL_IP, IPT_SO_GET_INFO, ...) = 0 getsockopt(4, SOL_IP, IPT_SO_GET_ENTRIES, ...) = 0 If these were setsockopt calls, then 0x40 & 0x41 would be IPT_SO_SET_REPLACE & IPT_SO_SET_ADD_COUNTERS. * configure.ac: Check for netfilter headers. * defs.h (printxvals): New prototype. (printxval): Change to a define. * net.c: Include netfilter headers and new sockopts headers. (print_sockopt_fd_level_name): Add a is_getsockopt argument. Change SOL_IP and SOL_IPV6 decoding to use printxvals, and use is_getsockopt to pass more xlats down. (getsockopt): Call print_sockopt_fd_level_name with is_getsockopt as true. (setsockopt): Call print_sockopt_fd_level_name with is_getsockopt as false. * util.c (printxval): Rename to ... (printxvals): ... this. Rewrite to be varargs based. * xlat/getsockipoptions.in: New xlat list. * xlat/getsockipv6options.in, xlat/setsockipoptions.in, xlat/setsockipv6options.in: Likewise.
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tcp->u_arg[1], tcp->u_arg[2], false);
print_setsockopt(tcp, tcp->u_arg[1], tcp->u_arg[2],
tcp->u_arg[3], tcp->u_arg[4]);
tprintf(", %d", (int) tcp->u_arg[4]);
return RVAL_DECODED;
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}