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-rw-r--r--contrib/slapd-modules/nssov/nss-pam-ldapd/nslcd-prot.h381
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diff --git a/contrib/slapd-modules/nssov/nss-pam-ldapd/nslcd-prot.h b/contrib/slapd-modules/nssov/nss-pam-ldapd/nslcd-prot.h
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+++ b/contrib/slapd-modules/nssov/nss-pam-ldapd/nslcd-prot.h
@@ -0,0 +1,381 @@
+/*
+ nslcd-prot.h - helper macros for reading and writing in protocol streams
+
+ Copyright (C) 2006 West Consulting
+ Copyright (C) 2006-2014 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 COMMON__NSLCD_PROT_H
+#define COMMON__NSLCD_PROT_H 1
+
+#include <arpa/inet.h>
+#include <netinet/in.h>
+
+#include "tio.h"
+
+/* If you use these macros you should define the following macros to
+ handle error conditions (these marcos should clean up and return from the
+ function):
+ ERROR_OUT_WRITEERROR(fp)
+ ERROR_OUT_READERROR(fp)
+ ERROR_OUT_BUFERROR(fp)
+ ERROR_OUT_NOSUCCESS(fp) */
+
+
+/* Debugging marcos that can be used to enable detailed protocol logging,
+ pass -DDEBUG_PROT to do overall protocol debugging, and -DDEBUG_PROT_DUMP
+ to dump the actual bytestream. */
+
+#ifdef DEBUG_PROT
+/* define a debugging macro to output logging */
+#include <string.h>
+#include <errno.h>
+#define DEBUG_PRINT(fmt, arg) \
+ fprintf(stderr, "%s:%d:%s: " fmt "\n", __FILE__, __LINE__, \
+ __PRETTY_FUNCTION__, arg);
+#else /* DEBUG_PROT */
+/* define an empty debug macro to disable logging */
+#define DEBUG_PRINT(fmt, arg)
+#endif /* not DEBUG_PROT */
+
+#ifdef DEBUG_PROT_DUMP
+/* define a debugging macro to output detailed logging */
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif /* HAVE_STDINT_H */
+static void debug_dump(const void *ptr, size_t size)
+{
+ int i;
+ for (i = 0; i < size; i++)
+ fprintf(stderr, " %02x", ((const uint8_t *)ptr)[i]);
+ fprintf(stderr, "\n");
+}
+#define DEBUG_DUMP(ptr, size) \
+ fprintf(stderr, "%s:%d:%s:", __FILE__, __LINE__, __PRETTY_FUNCTION__); \
+ debug_dump(ptr, size);
+#else /* DEBUG_PROT_DUMP */
+/* define an empty debug macro to disable logging */
+#define DEBUG_DUMP(ptr, size)
+#endif /* not DEBUG_PROT_DUMP */
+
+
+/* WRITE marcos, used for writing data, on write error they will
+ call the ERROR_OUT_WRITEERROR macro
+ these macros may require the availability of the following
+ variables:
+ int32_t tmpint32; - temporary variable
+ */
+
+#define WRITE(fp, ptr, size) \
+ DEBUG_PRINT("WRITE : var="__STRING(ptr)" size=%d", (int)size); \
+ DEBUG_DUMP(ptr, size); \
+ if (tio_write(fp, ptr, (size_t)size)) \
+ { \
+ DEBUG_PRINT("WRITE : var="__STRING(ptr)" error: %s", \
+ strerror(errno)); \
+ ERROR_OUT_WRITEERROR(fp); \
+ }
+
+#define WRITE_INT32(fp, i) \
+ DEBUG_PRINT("WRITE_INT32 : var="__STRING(i)" int32=%08x", (int)i); \
+ tmpint32 = htonl((int32_t)(i)); \
+ WRITE(fp, &tmpint32, sizeof(int32_t))
+
+#define WRITE_STRING(fp, str) \
+ DEBUG_PRINT("WRITE_STRING: var="__STRING(str)" string=\"%s\"", (str)); \
+ if ((str) == NULL) \
+ { \
+ WRITE_INT32(fp, 0); \
+ } \
+ else \
+ { \
+ WRITE_INT32(fp, strlen(str)); \
+ tmpint32 = ntohl(tmpint32); \
+ if (tmpint32 > 0) \
+ { \
+ WRITE(fp, (str), tmpint32); \
+ } \
+ }
+
+#define WRITE_STRINGLIST(fp, arr) \
+ if ((arr) == NULL) \
+ { \
+ DEBUG_PRINT("WRITE_STRLST: var="__STRING(arr)" num=%d", 0); \
+ WRITE_INT32(fp, 0); \
+ } \
+ else \
+ { \
+ /* first determine length of array */ \
+ for (tmp3int32 = 0; (arr)[tmp3int32] != NULL; tmp3int32++) \
+ /* noting */ ; \
+ /* write number of strings */ \
+ DEBUG_PRINT("WRITE_STRLST: var="__STRING(arr)" num=%d", (int)tmp3int32); \
+ WRITE_INT32(fp, tmp3int32); \
+ /* write strings */ \
+ for (tmp2int32 = 0; tmp2int32 < tmp3int32; tmp2int32++) \
+ { \
+ WRITE_STRING(fp, (arr)[tmp2int32]); \
+ } \
+ }
+
+#define WRITE_STRINGLIST_EXCEPT(fp, arr, not) \
+ /* first determine length of array */ \
+ tmp3int32 = 0; \
+ for (tmp2int32 = 0; (arr)[tmp2int32] != NULL; tmp2int32++) \
+ if (strcmp((arr)[tmp2int32], (not)) != 0) \
+ tmp3int32++; \
+ /* write number of strings (mius one because we intend to skip one) */ \
+ DEBUG_PRINT("WRITE_STRLST: var="__STRING(arr)" num=%d", (int)tmp3int32); \
+ WRITE_INT32(fp, tmp3int32); \
+ /* write strings */ \
+ for (tmp2int32 = 0; (arr)[tmp2int32] != NULL; tmp2int32++) \
+ { \
+ if (strcmp((arr)[tmp2int32], (not)) != 0) \
+ { \
+ WRITE_STRING(fp, (arr)[tmp2int32]); \
+ } \
+ }
+
+/* READ macros, used for reading data, on read error they will
+ call the ERROR_OUT_READERROR or ERROR_OUT_BUFERROR macro
+ these macros may require the availability of the following
+ variables:
+ int32_t tmpint32; - temporary variable
+ */
+
+#define READ(fp, ptr, size) \
+ if (tio_read(fp, ptr, (size_t)size)) \
+ { \
+ DEBUG_PRINT("READ : var="__STRING(ptr)" error: %s", \
+ strerror(errno)); \
+ ERROR_OUT_READERROR(fp); \
+ } \
+ DEBUG_PRINT("READ : var="__STRING(ptr)" size=%d", (int)(size)); \
+ DEBUG_DUMP(ptr, size);
+
+#define READ_INT32(fp, i) \
+ READ(fp, &tmpint32, sizeof(int32_t)); \
+ (i) = (int32_t)ntohl(tmpint32); \
+ DEBUG_PRINT("READ_INT32 : var="__STRING(i)" int32==%08x", (int)(i));
+
+/* read a string in a fixed-size "normal" buffer */
+#define READ_STRING(fp, buffer) \
+ /* read the size of the string */ \
+ READ(fp, &tmpint32, sizeof(int32_t)); \
+ tmpint32 = ntohl(tmpint32); \
+ DEBUG_PRINT("READ_STRING: var="__STRING(buffer)" strlen=%d", tmpint32); \
+ /* check if read would fit */ \
+ if (((size_t)tmpint32) >= sizeof(buffer)) \
+ { \
+ /* will not fit */ \
+ tmpint32 = (tmpint32 - sizeof(buffer)) + 1; \
+ DEBUG_PRINT("READ : buffer %d bytes too small", tmpint32); \
+ ERROR_OUT_BUFERROR(fp); \
+ } \
+ /* read string from the stream */ \
+ if (tmpint32 > 0) \
+ { \
+ READ(fp, buffer, (size_t)tmpint32); \
+ } \
+ /* null-terminate string in buffer */ \
+ buffer[tmpint32] = '\0'; \
+ DEBUG_PRINT("READ_STRING: var="__STRING(buffer)" string=\"%s\"", buffer);
+
+
+/* READ BUF macros that read data into a pre-allocated buffer.
+ these macros may require the availability of the following
+ variables:
+ int32_t tmpint32; - temporary variable
+ char *buffer; - pointer to a buffer for reading strings
+ size_t buflen; - the size of the buffer
+ size_t bufptr; - the current position in the buffer
+ */
+
+/* current position in the buffer */
+#define BUF_CUR \
+ (buffer + bufptr)
+
+/* check that the buffer has sz bytes left in it */
+#define BUF_CHECK(fp, sz) \
+ if ((bufptr + (size_t)(sz)) > buflen) \
+ { \
+ /* will not fit */ \
+ tmpint32 = bufptr + (sz) - (buflen); \
+ DEBUG_PRINT("READ : buffer %d bytes too small", tmpint32); \
+ ERROR_OUT_BUFERROR(fp); \
+ }
+
+/* move the buffer pointer */
+#define BUF_SKIP(sz) \
+ bufptr += (size_t)(sz);
+
+/* move BUF_CUR foreward so that it is aligned to the specified
+ type width */
+#define BUF_ALIGN(fp, type) \
+ /* figure out number of bytes to skip foreward */ \
+ tmp2int32 = (sizeof(type) - ((BUF_CUR - (char *)NULL) % sizeof(type))) \
+ % sizeof(type); \
+ /* check and skip */ \
+ BUF_CHECK(fp, tmp2int32); \
+ BUF_SKIP(tmp2int32);
+
+/* allocate a piece of the buffer to store an array in */
+#define BUF_ALLOC(fp, ptr, type, num) \
+ /* align to the specified type width */ \
+ BUF_ALIGN(fp, type); \
+ /* check that we have enough room */ \
+ BUF_CHECK(fp, (size_t)(num) * sizeof(type)); \
+ /* store the pointer */ \
+ (ptr) = (type *)BUF_CUR; \
+ /* reserve the space */ \
+ BUF_SKIP((size_t)(num) * sizeof(type));
+
+/* read a binary blob into the buffer */
+#define READ_BUF(fp, ptr, sz) \
+ /* check that there is enough room and read */ \
+ BUF_CHECK(fp, sz); \
+ READ(fp, BUF_CUR, (size_t)sz); \
+ /* store pointer and skip */ \
+ (ptr) = BUF_CUR; \
+ BUF_SKIP(sz);
+
+/* read string in the buffer (using buffer, buflen and bufptr)
+ and store the actual location of the string in field */
+#define READ_BUF_STRING(fp, field) \
+ /* read the size of the string */ \
+ READ(fp, &tmpint32, sizeof(int32_t)); \
+ tmpint32 = ntohl(tmpint32); \
+ DEBUG_PRINT("READ_BUF_STRING: var="__STRING(field)" strlen=%d", tmpint32); \
+ /* check if read would fit */ \
+ BUF_CHECK(fp, tmpint32 + 1); \
+ /* read string from the stream */ \
+ if (tmpint32 > 0) \
+ { \
+ READ(fp, BUF_CUR, (size_t)tmpint32); \
+ } \
+ /* null-terminate string in buffer */ \
+ BUF_CUR[tmpint32] = '\0'; \
+ DEBUG_PRINT("READ_BUF_STRING: var="__STRING(field)" string=\"%s\"", BUF_CUR); \
+ /* prepare result */ \
+ (field) = BUF_CUR; \
+ BUF_SKIP(tmpint32 + 1);
+
+/* read an array from a stram and store it as a null-terminated
+ array list (size for the array is allocated) */
+#define READ_BUF_STRINGLIST(fp, arr) \
+ /* read the number of entries */ \
+ READ(fp, &tmp3int32, sizeof(int32_t)); \
+ tmp3int32 = ntohl(tmp3int32); \
+ DEBUG_PRINT("READ_STRLST: var="__STRING(arr)" num=%d", (int)tmp3int32); \
+ /* allocate room for *char[num + 1] */ \
+ BUF_ALLOC(fp, arr, char *, tmp3int32 + 1); \
+ /* read all entries */ \
+ for (tmp2int32 = 0; tmp2int32 < tmp3int32; tmp2int32++) \
+ { \
+ READ_BUF_STRING(fp, (arr)[tmp2int32]); \
+ } \
+ /* set last entry to NULL */ \
+ (arr)[tmp2int32] = NULL;
+
+
+/* SKIP macros for skipping over certain parts of the protocol stream. */
+
+/* skip a number of bytes foreward */
+#define SKIP(fp, sz) \
+ DEBUG_PRINT("READ : skip %d bytes", (int)(sz)); \
+ /* read (skip) the specified number of bytes */ \
+ if (tio_skip(fp, sz)) \
+ { \
+ DEBUG_PRINT("READ : skip error: %s", strerror(errno)); \
+ ERROR_OUT_READERROR(fp); \
+ }
+
+/* read a string from the stream but don't do anything with the result */
+#define SKIP_STRING(fp) \
+ /* read the size of the string */ \
+ READ(fp, &tmpint32, sizeof(int32_t)); \
+ tmpint32 = ntohl(tmpint32); \
+ DEBUG_PRINT("READ_STRING: skip %d bytes", (int)tmpint32); \
+ /* read (skip) the specified number of bytes */ \
+ SKIP(fp, tmpint32);
+
+/* skip a list of strings */
+#define SKIP_STRINGLIST(fp) \
+ /* read the number of entries */ \
+ READ(fp, &tmp3int32, sizeof(int32_t)); \
+ tmp3int32 = ntohl(tmp3int32); \
+ DEBUG_PRINT("READ_STRLST: skip %d strings", (int)tmp3int32); \
+ /* read all entries */ \
+ for (tmp2int32 = 0; tmp2int32 < tmp3int32; tmp2int32++) \
+ { \
+ SKIP_STRING(fp); \
+ }
+
+
+/* These are functions and macors for performing common operations in
+ the nslcd request/response protocol. */
+
+/* returns a socket to the server or NULL on error (see errno),
+ socket should be closed with tio_close() */
+TFILE *nslcd_client_open(void)
+ MUST_USE;
+
+/* generic request code */
+#define NSLCD_REQUEST(fp, action, writefn) \
+ /* open a client socket */ \
+ if ((fp = nslcd_client_open()) == NULL) \
+ { \
+ ERROR_OUT_OPENERROR; \
+ } \
+ /* write a request header with a request code */ \
+ WRITE_INT32(fp, (int32_t)NSLCD_VERSION) \
+ WRITE_INT32(fp, (int32_t)action) \
+ /* write the request parameters (if any) */ \
+ writefn; \
+ /* flush the stream */ \
+ if (tio_flush(fp) < 0) \
+ { \
+ DEBUG_PRINT("WRITE_FLUSH : error: %s", strerror(errno)); \
+ ERROR_OUT_WRITEERROR(fp); \
+ } \
+ /* read and check response version number */ \
+ READ(fp, &tmpint32, sizeof(int32_t)); \
+ tmpint32 = ntohl(tmpint32); \
+ if (tmpint32 != (int32_t)NSLCD_VERSION) \
+ { \
+ ERROR_OUT_READERROR(fp); \
+ } \
+ /* read and check response request number */ \
+ READ(fp, &tmpint32, sizeof(int32_t)); \
+ tmpint32 = ntohl(tmpint32); \
+ if (tmpint32 != (int32_t)(action)) \
+ { \
+ ERROR_OUT_READERROR(fp); \
+ }
+
+/* Read the response code (the result code of the query) from
+ the stream. */
+#define READ_RESPONSE_CODE(fp) \
+ READ(fp, &tmpint32, sizeof(int32_t)); \
+ tmpint32 = ntohl(tmpint32); \
+ if (tmpint32 != (int32_t)NSLCD_RESULT_BEGIN) \
+ { \
+ ERROR_OUT_NOSUCCESS(fp); \
+ }
+
+#endif /* not COMMON__NSLCD_PROT_H */