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| author | Lukas Nykryn <lnykryn@redhat.com> | 2013-09-02 14:39:42 +0200 |
|---|---|---|
| committer | Lukas Nykryn <lnykryn@redhat.com> | 2013-09-02 14:39:42 +0200 |
| commit | 515af1d015295f3562f6ab4de8da66424ecd8f7a (patch) | |
| tree | 1848e9a8d16a123ec1d281c9abf11a850571a293 | |
| parent | b873be923e1ba63b0cbd98aee317d34964b42280 (diff) | |
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ipcalc: support RFC3021 (#997271)
| -rw-r--r-- | src/ipcalc.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/ipcalc.c b/src/ipcalc.c index 7316f058..bec14eb5 100644 --- a/src/ipcalc.c +++ b/src/ipcalc.c @@ -141,7 +141,12 @@ struct in_addr calc_broadcast(struct in_addr addr, int prefix) struct in_addr broadcast; memset(&broadcast, 0, sizeof(broadcast)); - broadcast.s_addr = (addr.s_addr & mask.s_addr) | ~mask.s_addr; + +/* if prefix is set to 31 return 255.255.255.255 (RFC3021) */ + if (mask.s_addr == htonl(0xFFFFFFFE)) + broadcast.s_addr = htonl(0xFFFFFFFF); + else + broadcast.s_addr = (addr.s_addr & mask.s_addr) | ~mask.s_addr; return broadcast; } |