diff options
Diffstat (limited to 'source3/libsmb/nmblib.c')
| -rw-r--r-- | source3/libsmb/nmblib.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/source3/libsmb/nmblib.c b/source3/libsmb/nmblib.c index 81a9505d6b..7729380615 100644 --- a/source3/libsmb/nmblib.c +++ b/source3/libsmb/nmblib.c @@ -908,3 +908,47 @@ struct packet_struct *receive_packet(int fd,enum packet_type type,int t) } +/**************************************************************************** +return the number of bits that match between two 4 character buffers + ***************************************************************************/ +static int matching_bits(uchar *p1, uchar *p2) +{ + int i, j, ret = 0; + for (i=0; i<4; i++) { + if (p1[i] != p2[i]) break; + ret += 8; + } + + if (i==4) return ret; + + for (j=0; j<8; j++) { + if ((p1[i] & (1<<(7-j))) != (p2[i] & (1<<(7-j)))) break; + ret++; + } + + return ret; +} + + +static uchar sort_ip[4]; + +/**************************************************************************** +compare two query reply records + ***************************************************************************/ +static int name_query_comp(uchar *p1, uchar *p2) +{ + return matching_bits(p2+2, sort_ip) - matching_bits(p1+2, sort_ip); +} + +/**************************************************************************** +sort a set of 6 byte name query response records so that the IPs that +have the most leading bits in common with the specified address come first + ***************************************************************************/ +void sort_query_replies(char *data, int n, struct in_addr ip) +{ + if (n <= 1) return; + + putip(sort_ip, (char *)&ip); + + qsort(data, n, 6, name_query_comp); +} |