diff options
Diffstat (limited to 'lib/extv.h')
| -rw-r--r-- | lib/extv.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/lib/extv.h b/lib/extv.h index 9f13f7a2ce..c791d9bba9 100644 --- a/lib/extv.h +++ b/lib/extv.h @@ -48,9 +48,11 @@ int _gnutls_extv_append_init(gnutls_buffer_st *buf) return pos; } -/* its input is the buffer and the return value of _gnutls_extv_append_init() */ +/* its input is the buffer and the return value of _gnutls_extv_append_init() + * @is_hello: should be true for client and server hello messages. + */ inline static -int _gnutls_extv_append_final(gnutls_buffer_st *buf, unsigned init) +int _gnutls_extv_append_final(gnutls_buffer_st *buf, unsigned init, unsigned is_hello) { unsigned size = buf->length - init - 2; @@ -59,6 +61,11 @@ int _gnutls_extv_append_final(gnutls_buffer_st *buf, unsigned init) if (size > 0) _gnutls_write_uint16(size, &buf->data[init]); + else if (is_hello && size == 0) { + /* there is no point to send empty extension bytes, and + * they are known to break certain clients */ + buf->length -= 2; + } return 0; } |