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/*
* userv - common.h
* definitions shared between client and daemon
*
* userv is copyright Ian Jackson and other contributors.
* See README for full authorship information.
*
* This 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 3 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.
*
* You should have received a copy of the GNU General Public License
* along with userv; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef COMMON_H
#define COMMON_H
#define COPYRIGHT(indent,nl) \
indent "Copyright 1996-2021 Ian Jackson; copyright 2000 Ben Harris;" nl \
indent "Copyright 2021 Genome Research Limited apropos work by" nl \
indent "Matthew Vernon." nl \
indent "there is NO WARRANTY; type `userv --copyright' for details." nl
#define PCSUMSIZE 16
static const unsigned char protocolchecksumversion[PCSUMSIZE]= {
#include "pcsum.h"
};
#ifndef VARDIR
# define VARDIR "/var/run/userv"
#endif
#ifndef RENDEZVOUS
# define RENDEZVOUS "socket"
#endif
#ifndef RENDEZVOUSPATH
# define RENDEZVOUSPATH VARDIR "/" RENDEZVOUS
#endif
#ifndef PIPEFORMAT
# define PIPEFORMAT "%lx.%lx.%x"
# define PIPEPATTERN "[0-9a-f]*.[0-9a-f]*.*[0-9a-f]"
# define PIPEFORMATEXTEND ((int)(sizeof(unsigned long)*2*2+(int)sizeof(int)*2+3))
# define PIPEMAXLEN ((int)(sizeof(PIPEFORMAT)+PIPEFORMATEXTEND))
#endif
#ifndef PIPEPATHFORMAT
# define PIPEPATHFORMAT VARDIR "/" PIPEFORMAT
# define PIPEPATHMAXLEN ((int)(sizeof(PIPEPATHFORMAT)+PIPEFORMATEXTEND))
#endif
#define MAX_ALLOW_FD 1024
#define MAX_GENERAL_STRING (1024*1024)
#define MAX_OVERRIDE_LEN MAX_GENERAL_STRING
#define MAX_ERRMSG_STRING 4096
#define MAX_ARGSDEFVAR 4096
#define MAX_GIDS 1024
#ifdef DEBUG
# define BASE_MAGIC 0x5deb7567UL /* "\x5d\xebug" */
#else
# define BASE_MAGIC 0x755e7276UL /* "u\x5erv" */
#endif
enum {
OPENING_MAGIC= BASE_MAGIC+1,
REQUEST_MAGIC,
REQUEST_END_MAGIC,
PROGRESS_MAGIC,
PROGRESS_ERRMSG_END_MAGIC,
EVENT_MAGIC
};
struct opening_msg {
unsigned long magic;
unsigned char protocolchecksumversion[PCSUMSIZE];
pid_t overlordpid, serverpid;
};
struct request_msg {
unsigned long magic;
pid_t clientpid; /* or -1 if no service is required and this was a version check */
int serviceuserlen;
int servicelen;
int loginnamelen, spoofed; /* spoofed is 0 or 1 */
int cwdlen, overridelen;
uid_t callinguid;
int ngids, nreadfds, nwritefds, nargs, nvars;
/* Followed by:
* serviceuserlen bytes for the service user (unterminated)
* servicelen bytes for the service (unterminated)
* loginnamelen bytes for the login name (unterminated)
* cwdlen bytes for the cwd (unterminated)
* overridelen bytes for the override data (with extra \n but unterminated),
* or nothing if overridelen==-1
* ngids gid_ts for the primary group and supplementary groups
* nreadfds and then nwritefds ints for the file descriptors
* for each of the nargs arguments
* an int for the string length
* that many characters (unterminated)
* for each for the nvars variable keys
* an int for the key length
* that many characters (unterminated)
* an int for the value length
* that many characters (unterminated)
* one unsigned long, endmagic;
*/
};
struct progress_msg {
unsigned long magic;
enum { pt_ok, pt_errmsg, pt_failed, pt_terminated } type;
union {
struct { int messagelen; } errmsg;
struct { int status; } terminated;
} data;
/* follwed by variable-length part:
* for ok, failed, terminated: nothing
* for errmsg: messagelen bytes for the error message (unterminated, no \n)
* unsigned long PROGRESS_ERRMSG_END_MAGIC
*/
};
struct event_msg {
unsigned long magic;
enum { et_confirm, et_closereadfd, et_disconnect } type;
union {
struct { int fd; } closereadfd;
} data;
};
#endif
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