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/*
nslcd.h - file describing client/server protocol
Copyright (C) 2006 West Consulting
Copyright (C) 2006, 2007, 2009, 2010, 2011, 2012, 2013 Arthur de Jong
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#ifndef _NSLCD_H
#define _NSLCD_H 1
/*
The protocol used between the nslcd client and server is a simple binary
protocol. It is request/response based where the client initiates a
connection, does a single request and closes the connection again. Any
mangled or not understood messages will be silently ignored by the server.
A request looks like:
INT32 NSLCD_VERSION
INT32 NSLCD_ACTION_*
[request parameters if any]
A response looks like:
INT32 NSLCD_VERSION
INT32 NSLCD_ACTION_* (the original request type)
[result(s)]
INT32 NSLCD_RESULT_END
A single result entry looks like:
INT32 NSLCD_RESULT_BEGIN
[result value(s)]
If a response would return multiple values (e.g. for NSLCD_ACTION_*_ALL
functions) each return value will be preceded by a NSLCD_RESULT_BEGIN
value. After the last returned result the server sends
NSLCD_RESULT_END. If some error occurs (e.g. LDAP server unavailable,
error in the request, etc) the server terminates the connection to signal
an error condition (breaking the protocol).
These are the available basic data types:
INT32 - 32-bit integer value
TYPE - a typed field that is transferred using sizeof()
STRING - a string length (32bit) followed by the string value (not
null-terminated) the string itself is assumed to be UTF-8
STRINGLIST - a 32-bit number noting the number of strings followed by
the strings one at a time
Furthermore the ADDRESS compound data type is defined as:
INT32 type of address: e.g. AF_INET or AF_INET6
INT32 length of address
RAW the address itself
With the ADDRESSLIST using the same construct as with STRINGLIST.
The protocol uses network byte order for all types.
*/
/* The current version of the protocol. This protocol should only be
updated with major backwards-incompatible changes. */
#define NSLCD_VERSION 0x00000002
/* Get a NSLCD configuration option. There is one request parameter:
INT32 NSLCD_CONFIG_*
the result value is:
STRING value, interpretation depending on request */
#define NSLCD_ACTION_CONFIG_GET 0x00010001
/* return the message, if any, that is presented to the user when password
modification through PAM is prohibited */
#define NSLCD_CONFIG_PAM_PASSWORD_PROHIBIT_MESSAGE 1
/* Email alias (/etc/aliases) NSS requests. The result values for a
single entry are:
STRING alias name
STRINGLIST alias rcpts */
#define NSLCD_ACTION_ALIAS_BYNAME 0x00020001
#define NSLCD_ACTION_ALIAS_ALL 0x00020008
/* Ethernet address/name mapping NSS requests. The result values for a
single entry are:
STRING ether name
TYPE(uint8_t[6]) ether address */
#define NSLCD_ACTION_ETHER_BYNAME 0x00030001
#define NSLCD_ACTION_ETHER_BYETHER 0x00030002
#define NSLCD_ACTION_ETHER_ALL 0x00030008
/* Group and group membership related NSS requests. The result values
for a single entry are:
STRING group name
STRING group password
INT32 group id
STRINGLIST members (usernames) of the group
(not that the BYMEMER call returns an empty members list) */
#define NSLCD_ACTION_GROUP_BYNAME 0x00040001
#define NSLCD_ACTION_GROUP_BYGID 0x00040002
#define NSLCD_ACTION_GROUP_BYMEMBER 0x00040006
#define NSLCD_ACTION_GROUP_ALL 0x00040008
/* Hostname (/etc/hosts) lookup NSS requests. The result values
for an entry are:
STRING host name
STRINGLIST host aliases
ADDRESSLIST host addresses */
#define NSLCD_ACTION_HOST_BYNAME 0x00050001
#define NSLCD_ACTION_HOST_BYADDR 0x00050002
#define NSLCD_ACTION_HOST_ALL 0x00050008
/* Netgroup NSS result entries contain a number of parts. A result entry
starts with:
STRING netgroup name
followed by zero or more references to other netgroups or netgroup
triples. A reference to another netgroup looks like:
INT32 NSLCD_NETGROUP_TYPE_NETGROUP
STRING other netgroup name
A a netgroup triple looks like:
INT32 NSLCD_NETGROUP_TYPE_TRIPLE
STRING host
STRING user
STRING domain
A netgroup result entry is terminated by:
INT32 NSLCD_NETGROUP_TYPE_END
*/
#define NSLCD_ACTION_NETGROUP_BYNAME 0x00060001
#define NSLCD_ACTION_NETGROUP_ALL 0x00060008
#define NSLCD_NETGROUP_TYPE_NETGROUP 1
#define NSLCD_NETGROUP_TYPE_TRIPLE 2
#define NSLCD_NETGROUP_TYPE_END 3
/* Network name (/etc/networks) NSS requests. Result values for a single
entry are:
STRING network name
STRINGLIST network aliases
ADDRESSLIST network addresses */
#define NSLCD_ACTION_NETWORK_BYNAME 0x00070001
#define NSLCD_ACTION_NETWORK_BYADDR 0x00070002
#define NSLCD_ACTION_NETWORK_ALL 0x00070008
/* User account (/etc/passwd) NSS requests. Result values are:
STRING user name
STRING user password
INT32 user id
INT32 group id
STRING gecos information
STRING home directory
STRING login shell */
#define NSLCD_ACTION_PASSWD_BYNAME 0x00080001
#define NSLCD_ACTION_PASSWD_BYUID 0x00080002
#define NSLCD_ACTION_PASSWD_ALL 0x00080008
/* Protocol information requests. Result values are:
STRING protocol name
STRINGLIST protocol aliases
INT32 protocol number */
#define NSLCD_ACTION_PROTOCOL_BYNAME 0x00090001
#define NSLCD_ACTION_PROTOCOL_BYNUMBER 0x00090002
#define NSLCD_ACTION_PROTOCOL_ALL 0x00090008
/* RPC information requests. Result values are:
STRING rpc name
STRINGLIST rpc aliases
INT32 rpc number */
#define NSLCD_ACTION_RPC_BYNAME 0x000a0001
#define NSLCD_ACTION_RPC_BYNUMBER 0x000a0002
#define NSLCD_ACTION_RPC_ALL 0x000a0008
/* Service (/etc/services) information requests. The BYNAME and BYNUMBER
requests contain an extra protocol string in the request which, if not
blank, will filter the services by this protocol. Result values are:
STRING service name
STRINGLIST service aliases
INT32 service (port) number
STRING service protocol */
#define NSLCD_ACTION_SERVICE_BYNAME 0x000b0001
#define NSLCD_ACTION_SERVICE_BYNUMBER 0x000b0002
#define NSLCD_ACTION_SERVICE_ALL 0x000b0008
/* Extended user account (/etc/shadow) information requests. Result
values for a single entry are:
STRING user name
STRING user password
INT32 last password change
INT32 mindays
INT32 maxdays
INT32 warn
INT32 inact
INT32 expire
INT32 flag */
#define NSLCD_ACTION_SHADOW_BYNAME 0x000c0001
#define NSLCD_ACTION_SHADOW_ALL 0x000c0008
/* PAM-related requests. The request parameters for all these requests
begin with:
STRING user name
STRING service name
STRING ruser
STRING rhost
STRING tty
If the user is not known in LDAP no result may be returned (immediately
return NSLCD_RESULT_END instead of a PAM error code). */
/* PAM authentication check request. The extra request values are:
STRING password
and the result value consists of:
INT32 authc NSLCD_PAM_* result code
STRING user name (the canonical user name)
INT32 authz NSLCD_PAM_* result code
STRING authorisation error message
If the username is empty in this request an attempt is made to
authenticate as the administrator (set using rootpwmoddn).
Some authorisation checks are already done during authentication so the
response also includes authorisation information. */
#define NSLCD_ACTION_PAM_AUTHC 0x000d0001
/* PAM authorisation check request. The result value consists of:
INT32 authz NSLCD_PAM_* result code
STRING authorisation error message
The authentication check may have already returned some authorisation
information. The authorisation error message, if supplied, will be used
by the PAM module instead of a message that is generated by the PAM
module itself. */
#define NSLCD_ACTION_PAM_AUTHZ 0x000d0002
/* PAM session open request. The result value consists of:
STRING session id
This session id may be used to close this session with. */
#define NSLCD_ACTION_PAM_SESS_O 0x000d0003
/* PAM session close request. This request has the following
extra request value:
STRING session id
and this calls only returns an empty response value. */
#define NSLCD_ACTION_PAM_SESS_C 0x000d0004
/* PAM password modification request. This requests has the following extra
request values:
INT32 asroot: 0=oldpasswd is user passwd, 1=oldpasswd is root passwd
STRING old password
STRING new password
and returns there extra result values:
INT32 NSLCD_PAM_* result code
STRING error message */
#define NSLCD_ACTION_PAM_PWMOD 0x000d0005
/* User information change request. This request allows one to change
their full name and other information. The request parameters for this
request are:
STRING user name
INT32 asroot: 0=passwd is user passwd, 1=passwd is root passwd
STRING password
followed by one or more of the below, terminated by NSLCD_USERMOD_END
INT32 NSLCD_USERMOD_*
STRING new value
the response consists of one or more of the entries below, terminated
by NSLCD_USERMOD_END:
INT32 NSLCD_USERMOD_*
STRING response
(if the response is blank, the change went OK, otherwise the string
contains an error message)
*/
#define NSLCD_ACTION_USERMOD 0x000e0001
/* These are the possible values for the NSLCD_ACTION_USERMOD operation
above. */
#define NSLCD_USERMOD_END 0 /* end of change values */
#define NSLCD_USERMOD_RESULT 1 /* global result value */
#define NSLCD_USERMOD_FULLNAME 2 /* full name */
#define NSLCD_USERMOD_ROOMNUMBER 3 /* room number */
#define NSLCD_USERMOD_WORKPHONE 4 /* office phone number */
#define NSLCD_USERMOD_HOMEPHONE 5 /* home phone number */
#define NSLCD_USERMOD_OTHER 6 /* other info */
#define NSLCD_USERMOD_HOMEDIR 7 /* home directory */
#define NSLCD_USERMOD_SHELL 8 /* login shell */
/* Request result codes. */
#define NSLCD_RESULT_BEGIN 1
#define NSLCD_RESULT_END 2
/* Partial list of PAM result codes. */
#define NSLCD_PAM_SUCCESS 0 /* everything ok */
#define NSLCD_PAM_PERM_DENIED 6 /* Permission denied */
#define NSLCD_PAM_AUTH_ERR 7 /* Authc failure */
#define NSLCD_PAM_CRED_INSUFFICIENT 8 /* Cannot access authc data */
#define NSLCD_PAM_AUTHINFO_UNAVAIL 9 /* Cannot retrieve authc info */
#define NSLCD_PAM_USER_UNKNOWN 10 /* User not known */
#define NSLCD_PAM_MAXTRIES 11 /* Retry limit reached */
#define NSLCD_PAM_NEW_AUTHTOK_REQD 12 /* Password expired */
#define NSLCD_PAM_ACCT_EXPIRED 13 /* Account expired */
#define NSLCD_PAM_SESSION_ERR 14 /* Cannot make/remove session record */
#define NSLCD_PAM_AUTHTOK_ERR 20 /* Authentication token manipulation error */
#define NSLCD_PAM_AUTHTOK_DISABLE_AGING 23 /* Password aging disabled */
#define NSLCD_PAM_IGNORE 25 /* Ignore module */
#define NSLCD_PAM_ABORT 26 /* Fatal error */
#define NSLCD_PAM_AUTHTOK_EXPIRED 27 /* authentication token has expired */
#endif /* not _NSLCD_H */
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