diff options
| author | Matt Caswell <matt@openssl.org> | 2014-12-01 23:57:44 +0000 |
|---|---|---|
| committer | Matt Caswell <matt@openssl.org> | 2014-12-03 09:43:49 +0000 |
| commit | 82d7247fc5feca45c9a3526582912ccfe8e5f96a (patch) | |
| tree | 8dbb8d87d1eade8adafa693245da9d5fdec0c9b3 | |
| parent | ceb4c684e463d560e35833da5f575719b5c5af51 (diff) | |
Updates to s_client and s_server to remove the constant 28 (for IPv4 header
and UDP header) when setting an mtu. This constant is not always correct (e.g.
if using IPv6). Use the new DTLS_CTRL functions instead.
Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit 464ce92026bd0c79186cbefa75470f39607110be)
| -rw-r--r-- | apps/s_client.c | 16 | ||||
| -rw-r--r-- | apps/s_server.c | 18 |
2 files changed, 30 insertions, 4 deletions
diff --git a/apps/s_client.c b/apps/s_client.c index 1e377debc0..fb170e256a 100644 --- a/apps/s_client.c +++ b/apps/s_client.c @@ -1018,10 +1018,22 @@ re_start: BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_SEND_TIMEOUT, 0, &timeout); } - if (socket_mtu > 28) + if (socket_mtu) { + if(socket_mtu < DTLS_get_link_min_mtu(con)) + { + BIO_printf(bio_err,"MTU too small. Must be at least %ld\n", + DTLS_get_link_min_mtu(con)); + BIO_free(sbio); + goto shut; + } SSL_set_options(con, SSL_OP_NO_QUERY_MTU); - SSL_set_mtu(con, socket_mtu - 28); + if(!DTLS_set_link_mtu(con, socket_mtu)) + { + BIO_printf(bio_err, "Failed to set MTU\n"); + BIO_free(sbio); + goto shut; + } } else /* want to do MTU discovery */ diff --git a/apps/s_server.c b/apps/s_server.c index f25f530d60..876d76a72d 100644 --- a/apps/s_server.c +++ b/apps/s_server.c @@ -1856,10 +1856,24 @@ static int sv_body(char *hostname, int s, unsigned char *context) BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_SEND_TIMEOUT, 0, &timeout); } - if (socket_mtu > 28) + if (socket_mtu) { + if(socket_mtu < DTLS_get_link_min_mtu(con)) + { + BIO_printf(bio_err,"MTU too small. Must be at least %ld\n", + DTLS_get_link_min_mtu(con)); + ret = -1; + BIO_free(sbio); + goto err; + } SSL_set_options(con, SSL_OP_NO_QUERY_MTU); - SSL_set_mtu(con, socket_mtu - 28); + if(!DTLS_set_link_mtu(con, socket_mtu)) + { + BIO_printf(bio_err, "Failed to set MTU\n"); + ret = -1; + BIO_free(sbio); + goto err; + } } else /* want to do MTU discovery */ |