diff options
author | Bernhard Schmidt <berni@debian.org> | 2020-10-28 19:46:08 +0100 |
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committer | Bernhard Schmidt <berni@debian.org> | 2020-10-28 19:46:08 +0100 |
commit | 8231554c9f1ba25cb4e698ad5cfb3a56b258610a (patch) | |
tree | 029108888123856ca13e34c612d4dd4845c2b6c3 /src/openvpn/pool.c | |
parent | 5bac5f7608a14e0989e95db1a1da2e65d9322127 (diff) | |
parent | 76fee93e6fe89e5575bae2840b585d2f025b9050 (diff) |
Merge tag 'debian/2.5.0-1' into buster-backports
openvpn Debian release 2.5.0-1
Diffstat (limited to 'src/openvpn/pool.c')
-rw-r--r-- | src/openvpn/pool.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/openvpn/pool.c b/src/openvpn/pool.c index 1f74ac5..ece0784 100644 --- a/src/openvpn/pool.c +++ b/src/openvpn/pool.c @@ -224,6 +224,24 @@ ifconfig_pool_init(const bool ipv4_pool, enum pool_type type, in_addr_t start, } pool->ipv6.base = ipv6_base; + + /* if a pool starts at a base address that has all-zero in the + * host part, that first IPv6 address must not be assigned to + * clients because it is not usable (subnet anycast address). + * Start with 1, then. + * + * NOTE: this will also (mis-)fire for something like + * ifconfig-ipv6-pool 2001:db8:0:1:1234::0/64 + * as we only check the rightmost 32 bits of the host part. So be it. + */ + if (base == 0) + { + msg(D_IFCONFIG_POOL, "IFCONFIG POOL IPv6: incrementing pool start " + "to avoid ::0 assignment"); + base++; + pool->ipv6.base.s6_addr[15]++; + } + pool_ipv6_size = ipv6_netbits >= 112 ? (1 << (128 - ipv6_netbits)) - base : IFCONFIG_POOL_MAX; |