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| author | Stephen Hemminger <stephen.hemminger@vyatta.com> | 2011-01-03 12:51:53 -0800 |
|---|---|---|
| committer | Mohit Mehta <mohit@vyatta.com> | 2011-01-04 17:47:15 -0800 |
| commit | b0696618f824100c0f5b1c5b8ed37cb05c0a77ec (patch) | |
| tree | cbf470b3e66af752bd0de988b9ae6282481b3112 /src/valid_address.c | |
| parent | 5ad0c4c085e189532121cff3101bcc91353c4834 (diff) | |
| download | vyatta-cfg-system-b0696618f824100c0f5b1c5b8ed37cb05c0a77ec.tar.gz vyatta-cfg-system-b0696618f824100c0f5b1c5b8ed37cb05c0a77ec.zip | |
Fix check for broadcast address
Bug 6625
The validate address function was not accounting for prefix length.
(cherry picked from commit d0312e91bad0d9d3741d61791928ac1b663a7f29)
Diffstat (limited to 'src/valid_address.c')
| -rw-r--r-- | src/valid_address.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/src/valid_address.c b/src/valid_address.c index 2f93c257..1053693e 100644 --- a/src/valid_address.c +++ b/src/valid_address.c @@ -62,20 +62,23 @@ static int valid_ipv4(const char *str) return 0; } - if (~addr == 0) { - fprintf(stderr, - "Can not assign broadcast address as IP address\n"); - return 0; - } - if (plen < 31) { uint32_t net_mask = ~0 << (32 - plen); + uint32_t broadcast = (addr & net_mask) | (~0 &~ net_mask); + if ((addr & net_mask) == addr) { fprintf(stderr, "Can not assign network address as IP address\n"); return 0; } + + if (addr == broadcast) { + fprintf(stderr, + "Can not assign broadcast address as IP address\n"); + return 0; + } } + return 1; bad_addr: |