1 files changed, 2 insertions, 2 deletions

diff --git a/sender.c b/sender.c
index 69cc527..cda56f9 100644
--- a/sender.c
+++ b/sender.c
@@ -32,7 +32,7 @@ static socklen_t logging_host_address_len = 0;
 static int logging_socket = -1;
 typedef uint64_t SessionId_t;
 
-enum { SESSION_ID_LENGTH = 8, AES_KEY_LENGTH = 16, GCM_IV_LENGTH = 16, GCM_TAG_LENGTH = 16 };
+enum { SESSION_ID_LENGTH = 8, AES_KEY_LENGTH = 16, GCM_IV_LENGTH = 12, GCM_TAG_LENGTH = 16 };
 static SessionId_t session_id;
 static uint8_t aes_key[16];
 static mbedtls_gcm_context ctx;
@@ -43,7 +43,7 @@ void send_udp(int sock, mbedtls_ctr_drbg_context *ctr_drbg, const uint8_t *text,
 
     const size_t total_length = 1 + SESSION_ID_LENGTH + GCM_IV_LENGTH + GCM_TAG_LENGTH + len;
     uint8_t *output = alloca(total_length);
-    output[0] = 1;
+    output[0] = 2;
     memcpy(output + 1, (uint8_t*)&session_id, SESSION_ID_LENGTH);
     memcpy(output + 1 + SESSION_ID_LENGTH, iv, GCM_IV_LENGTH);