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Add support for decoding the type of a cmsg.

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This commit is contained in:
Michael Tuexen 2018-01-15 10:59:04 +00:00
parent c1f0d826d6
commit a826eb5a41
6 changed files with 98 additions and 0 deletions
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1
lib/libsysdecode/Makefile
View File

@ -15,6 +15,7 @@ CFLAGS+= -I${SRCTOP}/libexec/rtld-elf
MAN= sysdecode.3 \
sysdecode_abi_to_freebsd_errno.3 \
sysdecode_cap_rights.3 \
sysdecode_cmsg_type.3 \
sysdecode_enum.3 \
sysdecode_fcntl_arg.3 \
sysdecode_kevent.3 \

40
lib/libsysdecode/flags.c
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@ -1159,6 +1159,46 @@ sysdecode_cap_rights(FILE *fp, cap_rights_t *rightsp)
}
}
static struct name_table cmsgtypeip[] = {
X(IP_RECVDSTADDR) X(IP_RECVTTL) X(IP_RECVOPTS) X(IP_RECVRETOPTS)
X(IP_RECVIF) X(IP_RECVTOS) X(IP_FLOWID) X(IP_FLOWTYPE)
X(IP_RSSBUCKETID) XEND
};
static struct name_table cmsgtypeipv6[] = {
#if 0
/* The RFC 2292 defines are kernel space only. */
X(IPV6_2292PKTINFO) X(IPV6_2292HOPLIMIT) X(IPV6_2292HOPOPTS)
X(IPV6_2292DSTOPTS) X(IPV6_2292RTHDR) X(IPV6_2292NEXTHOP)
#endif
X(IPV6_PKTINFO) X(IPV6_HOPLIMIT) X(IPV6_HOPOPTS)
X(IPV6_DSTOPTS) X(IPV6_RTHDR) X(IPV6_NEXTHOP)
X(IPV6_TCLASS) X(IPV6_FLOWID) X(IPV6_FLOWTYPE) X(IPV6_RSSBUCKETID)
X(IPV6_PATHMTU) X(IPV6_RTHDRDSTOPTS) X(IPV6_USE_MIN_MTU)
X(IPV6_DONTFRAG) X(IPV6_PREFER_TEMPADDR) XEND
};
static struct name_table cmsgtypesctp[] = {
X(SCTP_INIT) X(SCTP_SNDRCV) X(SCTP_EXTRCV) X(SCTP_SNDINFO)
X(SCTP_RCVINFO) X(SCTP_NXTINFO) X(SCTP_PRINFO) X(SCTP_AUTHINFO)
X(SCTP_DSTADDRV4) X(SCTP_DSTADDRV6) XEND
};
const char *
sysdecode_cmsg_type(int cmsg_level, int cmsg_type)
{
if (cmsg_level == SOL_SOCKET)
return (lookup_value(cmsgtypesocket, cmsg_type));
if (cmsg_level == IPPROTO_IP)
return (lookup_value(cmsgtypeip, cmsg_type));
if (cmsg_level == IPPROTO_IPV6)
return (lookup_value(cmsgtypeipv6, cmsg_type));
if (cmsg_level == IPPROTO_SCTP)
return (lookup_value(cmsgtypesctp, cmsg_type));
return (NULL);
}
const char *
sysdecode_sctp_pr_policy(int policy)
{

1
lib/libsysdecode/mktables
View File

@ -158,6 +158,7 @@ gen_table "umtxcvwaitflags" "CVWAIT_[A-Z_]+[[:space:]]+0x[0-9]+" "sys/
gen_table "umtxrwlockflags" "URWLOCK_PREFER_READER[[:space:]]+0x[0-9]+" "sys/umtx.h"
gen_table "caprights" "CAP_[A-Z_]+[[:space:]]+CAPRIGHT\([0-9],[[:space:]]+0x[0-9]{16}ULL\)" "sys/capsicum.h"
gen_table "sctpprpolicy" "SCTP_PR_SCTP_[A-Z_]+[[:space:]]+0x[0-9]+" "netinet/sctp_uio.h" "SCTP_PR_SCTP_ALL"
gen_table "cmsgtypesocket" "SCM_[A-Z_]+[[:space:]]+0x[0-9]+" "sys/socket.h"
if [ -e "${include_dir}/x86/sysarch.h" ]; then
gen_table "sysarchnum" "(AMD64|I386)_[A-Z86_]+[[:space:]]+[0-9]+" "x86/sysarch.h"
else

1
lib/libsysdecode/sysdecode.3
View File

@ -73,6 +73,7 @@ A placeholder for use when the ABI is not known.
.Sh SEE ALSO
.Xr sysdecode_abi_to_freebsd_errno 3 ,
.Xr sysdecode_cap_rights 3 ,
.Xr sysdecode_cmsg_type 3 ,
.Xr sysdecode_enum 3 ,
.Xr sysdecode_fcntl_arg 3 ,
.Xr sysdecode_ioctlname 3 ,

1
lib/libsysdecode/sysdecode.h
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@ -46,6 +46,7 @@ const char *sysdecode_atfd(int _fd);
bool sysdecode_atflags(FILE *_fp, int _flags, int *_rem);
bool sysdecode_cap_fcntlrights(FILE *_fp, uint32_t _rights, uint32_t *_rem);
void sysdecode_cap_rights(FILE *_fp, cap_rights_t *_rightsp);
const char *sysdecode_cmsg_type(int _cmsg_level, int _cmsg_type);
const char *sysdecode_extattrnamespace(int _namespace);
const char *sysdecode_fadvice(int _advice);
void sysdecode_fcntl_arg(FILE *_fp, int _cmd, uintptr_t _arg, int _base);

54
lib/libsysdecode/sysdecode_cmsg_type.3 Normal file
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@ -0,0 +1,54 @@
.\"
.\" Copyright (c) 2018 Michael Tuexen <tuexen@FreeBSD.org>
.\" 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.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
.\"
.\" $FreeBSD$
.\"
.Dd January 15, 2018
.Dt sysdecode_cmsg_type 3
.Os
.Sh NAME
.Nm sysdecode_cmsg_type
.Nd lookup name of cmsg type
.Sh LIBRARY
.Lb libsysdecode
.Sh SYNOPSIS
.In sys/types.h
.In stdbool.h
.In sysdecode.h
.Ft const char *
.Fn sysdecode_cmsg_type "int cmsg_level" "int cmsg_type"
.Sh DESCRIPTION
The
.Fn sysdecode_cmsg_type
function returns a text description of the
.Fa cmsg_type
member of a
.Vt struct cmsghdr .
.Fn sysdecode_cmsg_type
also takes the
.Fa cmsg_level
to uniquely identify the type.
.Sh SEE ALSO
.Xr sysdecode 3