summaryrefslogtreecommitdiff
path: root/src/ZrtpPacketSASrelay.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/ZrtpPacketSASrelay.cpp')
-rw-r--r--src/ZrtpPacketSASrelay.cpp75
1 files changed, 75 insertions, 0 deletions
diff --git a/src/ZrtpPacketSASrelay.cpp b/src/ZrtpPacketSASrelay.cpp
new file mode 100644
index 0000000..d132e28
--- /dev/null
+++ b/src/ZrtpPacketSASrelay.cpp
@@ -0,0 +1,75 @@
+/*
+ Copyright (C) 2006-2007 Werner Dittmann
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+ * Authors: Werner Dittmann <Werner.Dittmann@t-online.de>
+ */
+
+#include <libzrtpcpp/ZrtpPacketSASrelay.h>
+
+ZrtpPacketSASrelay::ZrtpPacketSASrelay() {
+ DEBUGOUT((fprintf(stdout, "Creating SASrelay packet without data, no sl data\n")));
+ initialize();
+ setSignatureLength(0);
+}
+
+ZrtpPacketSASrelay::ZrtpPacketSASrelay(uint32_t sl) {
+ DEBUGOUT((fprintf(stdout, "Creating SASrelay packet without data\n")));
+ initialize();
+ setSignatureLength(sl);
+}
+
+void ZrtpPacketSASrelay::initialize() {
+ void* allocated = &data;
+ memset(allocated, 0, sizeof(data));
+
+ zrtpHeader = (zrtpPacketHeader_t *)&((SASrelayPacket_t *)allocated)->hdr; // the standard header
+ sasRelayHeader = (SASrelay_t *)&((SASrelayPacket_t *)allocated)->sasrelay;
+
+ setZrtpId();
+ setMessageType((uint8_t*)SasRelayMsg);
+}
+
+void ZrtpPacketSASrelay::setSignatureLength(uint32_t sl) {
+ sl &= 0x1ff; // make sure it is max 9 bits
+ int32_t length = sizeof(ConfirmPacket_t) + (sl * ZRTP_WORD_SIZE);
+ sasRelayHeader->sigLength = sl; // sigLength is a uint byte
+ if (sl & 0x100) { // check the 9th bit
+ sasRelayHeader->filler[1] = 1; // and set it if necessary
+ }
+ setLength(length / 4);
+}
+
+uint32_t ZrtpPacketSASrelay::getSignatureLength() {
+ uint32_t sl = sasRelayHeader->sigLength;
+ if (sasRelayHeader->filler[1] == 1) { // do we have a 9th bit
+ sl |= 0x100;
+ }
+ return sl;
+}
+
+ZrtpPacketSASrelay::ZrtpPacketSASrelay(uint8_t* data) {
+ DEBUGOUT((fprintf(stdout, "Creating SASrelay packet from data\n")));
+
+ allocated = NULL;
+ zrtpHeader = (zrtpPacketHeader_t *)&((SASrelayPacket_t *)data)->hdr; // the standard header
+ sasRelayHeader = (SASrelay_t *)&((SASrelayPacket_t *)data)->sasrelay;
+}
+
+ZrtpPacketSASrelay::~ZrtpPacketSASrelay() {
+ DEBUGOUT((fprintf(stdout, "Deleting SASrelay packet: alloc: %x\n", allocated)));
+}