diff options
Diffstat (limited to 'crypto/bio/bss_dgram.c')
| -rw-r--r-- | crypto/bio/bss_dgram.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/crypto/bio/bss_dgram.c b/crypto/bio/bss_dgram.c index 4d1a64ea3..1b1e4bec8 100644 --- a/crypto/bio/bss_dgram.c +++ b/crypto/bio/bss_dgram.c @@ -616,6 +616,27 @@ static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr) ret = 0; #endif break; + case BIO_CTRL_DGRAM_GET_FALLBACK_MTU: + switch (data->peer.sa.sa_family) + { + case AF_INET: + ret = 576 - 20 - 8; + break; +#if OPENSSL_USE_IPV6 + case AF_INET6: +#ifdef IN6_IS_ADDR_V4MAPPED + if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr)) + ret = 576 - 20 - 8; + else +#endif + ret = 1280 - 40 - 8; + break; +#endif + default: + ret = 576 - 20 - 8; + break; + } + break; case BIO_CTRL_DGRAM_GET_MTU: return data->mtu; break; |