From 5eb6ddc45b9d00f2594c12ca90b57ed93a9e542c Mon Sep 17 00:00:00 2001
From: Alexey Khromov <zx@zxalexis.ru>
Date: Thu, 1 May 2025 18:10:15 +0300
Subject: [PATCH] Endianness check

---
 source/bforce/nodelist.c  |  9 ++++++---
 source/bforce/u_misc.c    | 33 +++++++++++++++++++++------------
 source/include/nodelist.h |  3 ++-
 source/include/util.h     |  2 ++
 4 files changed, 31 insertions(+), 16 deletions(-)

diff --git a/source/bforce/nodelist.c b/source/bforce/nodelist.c
index 582c7ea..9d6a87e 100644
--- a/source/bforce/nodelist.c
+++ b/source/bforce/nodelist.c
@@ -582,7 +582,7 @@ s_nodelist *nodelist_open(const char *dir, char *name, int mode)
 			return NULL;
 		}
 	}
-	
+	DEB((D_NODELIST, "nodelist_open: endianness = %x", (uint32_t) tmp.endian));
 	return xmemcpy(&tmp, sizeof(s_nodelist));
 }
 
@@ -630,6 +630,7 @@ int nodelist_checkheader(s_nodelist *nlp)
 			(long)nlstat.st_size, (long)nlsize);
 		return -1;
 	}
+	nlp->endian = buffer_getlong(buffer + 12);
 	
 	return 0;
 }
@@ -660,7 +661,7 @@ int nodelist_createheader(s_nodelist *nlp)
 
 	buffer_putlong(hdrbuf + 0, nlstat.st_mtime);
 	buffer_putlong(hdrbuf + 4, nlstat.st_size);
-	
+	buffer_putlong(hdrbuf + 12, (long) 0xDEADBEEF);
 	if( fseek(nlp->fp_index, 0L, SEEK_SET) == -1 )
 	{
 		logerr("cannot seek to zero offset of index");
@@ -754,7 +755,9 @@ int nodelist_findindex(s_nodelist *nlp, s_bni *bni, s_faddr addr)
 					bni->point  = buffer_getint(p + 6);
 					bni->hub    = buffer_getint(p + 8);
 					bni->offset = buffer_getlong(p + 10);
-					
+					if ((uint32_t)nlp->endian == 0xBEEFDEAD) {
+						swap_long((char *)&bni->offset);
+					}
 					DEB((D_NODELIST, "nodelist: findindex found" ));
 					return 0;
 				}
diff --git a/source/bforce/u_misc.c b/source/bforce/u_misc.c
index b6f2fec..8a84027 100644
--- a/source/bforce/u_misc.c
+++ b/source/bforce/u_misc.c
@@ -253,10 +253,10 @@ int checkmasks(const char *masks, const char *str)
  */
 char *buffer_putlong(char *buffer, long val)
 {
-	buffer[0] = ( ((unsigned long) val)       ) & 0xff;
-	buffer[1] = ( ((unsigned long) val) >> 8  ) & 0xff;
-	buffer[2] = ( ((unsigned long) val) >> 16 ) & 0xff;
-	buffer[3] = ( ((unsigned long) val) >> 24 ) & 0xff;
+	buffer[0] = ( ((uint_least32_t) val)       ) & 0xff;
+	buffer[1] = ( ((uint_least32_t) val) >> 8  ) & 0xff;
+	buffer[2] = ( ((uint_least32_t) val) >> 16 ) & 0xff;
+	buffer[3] = ( ((uint_least32_t) val) >> 24 ) & 0xff;
 	
 	return buffer;
 }
@@ -273,8 +273,8 @@ char *buffer_putlong(char *buffer, long val)
  */
 char *buffer_putint(char *buffer, int val)
 {
-	buffer[0] = ( ((unsigned int) val)       ) & 0xff;
-	buffer[1] = ( ((unsigned int) val) >> 8  ) & 0xff;
+	buffer[0] = ( ((uint_least16_t) val)       ) & 0xff;
+	buffer[1] = ( ((uint_least16_t) val) >> 8  ) & 0xff;
 	
 	return buffer;
 }
@@ -290,10 +290,10 @@ char *buffer_putint(char *buffer, int val)
  */
 long buffer_getlong(const char *buffer)
 {
-	return ( (unsigned long) ((unsigned char) buffer[0])       )
-	     | ( (unsigned long) ((unsigned char) buffer[1]) << 8  )
-	     | ( (unsigned long) ((unsigned char) buffer[2]) << 16 )
-	     | ( (unsigned long) ((unsigned char) buffer[3]) << 24 );
+	return (long)( (uint_least32_t) ((unsigned char) buffer[0])       )
+	           | ( (uint_least32_t) ((unsigned char) buffer[1]) << 8  )
+	           | ( (uint_least32_t) ((unsigned char) buffer[2]) << 16 )
+	           | ( (uint_least32_t) ((unsigned char) buffer[3]) << 24 );
 }
 
 /*****************************************************************************
@@ -307,8 +307,17 @@ long buffer_getlong(const char *buffer)
  */
 int buffer_getint(const char *buffer)
 {
-	return ( (unsigned int) ((unsigned char) buffer[0])      )
-	     | ( (unsigned int) ((unsigned char) buffer[1]) << 8 );
+	return (int)( (uint_least16_t) ((unsigned char) buffer[0])      )
+	          | ( (uint_least16_t) ((unsigned char) buffer[1]) << 8 );
+}
+
+void swap_long(char *buffer){
+	char *temp = xmemcpy(buffer, sizeof(uint32_t));
+	temp[0] = buffer[2];
+	temp[1] = buffer[3];
+	temp[2] = buffer[0];
+	temp[3] = buffer[1];
+	memcpy(buffer,temp,sizeof(uint32_t));
 }
 
 void printf_usage(const char *ident, const char *fmt, ...)
diff --git a/source/include/nodelist.h b/source/include/nodelist.h
index 2fcef0a..6d0bc1a 100644
--- a/source/include/nodelist.h
+++ b/source/include/nodelist.h
@@ -27,7 +27,7 @@
  *  0x0000   4 bytes    Nodelist file date
  *  0x0004   4 bytes    Nodelist file size
  *  0x0008   4 bytes    Total number of entries in index file
- *  0x000c   4 bytes    Unused
+ *  0x000c   4 bytes    ENDIANNES MARK
  *
  * Nodelist index is an array of next entries:
  *
@@ -123,6 +123,7 @@ typedef struct nodelist
 	char name_index[BF_MAXPATH+1];
 	char name_nodelist[BF_MAXPATH+1];
 	long entries;
+	long endian;
 }
 s_nodelist;
 
diff --git a/source/include/util.h b/source/include/util.h
index cdeefd6..8c19b06 100644
--- a/source/include/util.h
+++ b/source/include/util.h
@@ -189,8 +189,10 @@ char *buffer_putlong(char *buffer, long val);
 char *buffer_putint(char *buf, int val);
 long  buffer_getlong(const char *buf);
 int   buffer_getint(const char *buf);
+void swap_long(char *buffer);
 void  printf_usage(const char *ident, const char *fmt, ...);
 
+
 /* u_pkt.c */
 int   pkt_createpacket(const char *pktname, const s_packet *pkt);