| 1 | /*********************************************************** |
| 2 | Copyright IBM Corporation 1987 |
| 3 | |
| 4 | All Rights Reserved |
| 5 | |
| 6 | Permission to use, copy, modify, and distribute this software and its |
| 7 | documentation for any purpose and without fee is hereby granted, |
| 8 | provided that the above copyright notice appear in all copies and that |
| 9 | both that copyright notice and this permission notice appear in |
| 10 | supporting documentation, and that the name of IBM not be |
| 11 | used in advertising or publicity pertaining to distribution of the |
| 12 | software without specific, written prior permission. |
| 13 | |
| 14 | IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING |
| 15 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL |
| 16 | IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR |
| 17 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
| 18 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, |
| 19 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
| 20 | SOFTWARE. |
| 21 | |
| 22 | ******************************************************************/ |
| 23 | |
| 24 | /* |
| 25 | * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison |
| 26 | */ |
| 27 | |
| 28 | iso_maskmatch(sisoa, sisob, smask) |
| 29 | struct sockaddr_iso *sisoa, *sisob, smask; |
| 30 | { |
| 31 | caddr_t a, b, c; |
| 32 | int compare_len; |
| 33 | |
| 34 | if ( smask ) { |
| 35 | compare_len = smask->isoa_len; |
| 36 | } else if ((compare_len = isoaa->isoa_len) != isoab->isoa_len) |
| 37 | return 0; |
| 38 | |
| 39 | return masked_cmp(&sisoa->siso_addr, &sisob->siso_addr, |
| 40 | &smask->siso_addr, compare_len); |
| 41 | } |
| 42 | |
| 43 | int masked_cmp( a, b, c, len) |
| 44 | register caddr_t a, b, c; |
| 45 | int len; |
| 46 | { |
| 47 | caddr_t ax=a, bx=b, cx=c; |
| 48 | register int i; |
| 49 | |
| 50 | for( i=0; i< len; i++) { |
| 51 | if( (*a)&(*c) != (*b)&(*c) ) |
| 52 | break; |
| 53 | a++; |
| 54 | b++; |
| 55 | c++; |
| 56 | } |
| 57 | return (int) i; |
| 58 | } |