diff options
Diffstat (limited to 'source3')
| -rw-r--r-- | source3/smbd/mangle_hash2.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/source3/smbd/mangle_hash2.c b/source3/smbd/mangle_hash2.c index 88b9ba20cb..28200eb3ee 100644 --- a/source3/smbd/mangle_hash2.c +++ b/source3/smbd/mangle_hash2.c @@ -54,15 +54,21 @@ #define M_DEBUG(level, x) #endif +/* these flags are used to mark characters in as having particular + properties */ #define FLAG_BASECHAR 1 #define FLAG_ASCII 2 #define FLAG_ILLEGAL 4 #define FLAG_WILDCARD 8 + +/* the "possible" flags are used as a fast way to find possible DOS + reserved filenames */ #define FLAG_POSSIBLE1 16 #define FLAG_POSSIBLE2 32 #define FLAG_POSSIBLE3 64 #define FLAG_POSSIBLE4 128 +/* by default have a max of 4096 entries in the cache. */ #ifndef MANGLE_CACHE_SIZE #define MANGLE_CACHE_SIZE 4096 #endif @@ -100,11 +106,15 @@ static u32 mangle_hash(const char *key, unsigned length) u32 i; fstring str; + /* we have to uppercase here to ensure that the mangled name + doesn't depend on the case of the long name. Note that this + is the only place where we need to use a multi-byte string + function */ strncpy(str, key, length); str[length] = 0; strupper_m(str); - /* the length of a multi-byte string can change after a strupper */ + /* the length of a multi-byte string can change after a strupper_m */ length = strlen(str); /* Set the initial value from the key size. */ @@ -116,7 +126,7 @@ static u32 mangle_hash(const char *key, unsigned length) } /* - initialise the prefix cache + initialise (ie. allocate) the prefix cache */ static BOOL cache_init(void) { @@ -134,8 +144,8 @@ static BOOL cache_init(void) } /* - insert an entry into the prefix cache. The string may not be null terminated -*/ + insert an entry into the prefix cache. The string might not be null + terminated */ static void cache_insert(const char *prefix, int length, u32 hash) { int i = hash % MANGLE_CACHE_SIZE; @@ -419,7 +429,7 @@ static BOOL name_map(char *name, BOOL need83, BOOL cache83) /* find the hash for this prefix */ v = hash = mangle_hash(name, prefix_len); - /* now form the mangled name */ + /* now form the mangled name. */ new_name[0] = lead_char; new_name[7] = base_forward(v % 36); new_name[6] = '~'; |