diff options
Diffstat (limited to 'test/packetdrill/gre_packet.c')
-rw-r--r-- | test/packetdrill/gre_packet.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/test/packetdrill/gre_packet.c b/test/packetdrill/gre_packet.c new file mode 100644 index 0000000..235e6d9 --- /dev/null +++ b/test/packetdrill/gre_packet.c @@ -0,0 +1,56 @@ +/* + * Copyright 2013 Google Inc. + * + * 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 2 + * 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, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ +/* + * Author: ncardwell@google.com (Neal Cardwell) + * + * Implementation for module for formatting GRE packets. + */ + +#include "gre_packet.h" + +#include "ip_packet.h" +#include "gre.h" + +int gre_header_append(struct packet *packet, const struct gre *gre, char **error) +{ + struct header *header; + + header = packet_append_header(packet, HEADER_GRE, gre_len(gre)); + if (header == NULL) { + asprintf(error, "too many headers"); + return STATUS_ERR; + } + + memcpy(header->h.gre, gre, gre_len(gre)); + + return STATUS_OK; +} + +int gre_header_finish(struct packet *packet, + struct header *header, struct header *next_inner) +{ + struct gre *gre = header->h.gre; + int gre_bytes = gre_len(gre) + next_inner->total_bytes; + + gre->proto = htons(header_type_info(next_inner->type)->eth_proto); + + header->total_bytes = gre_bytes; + + return STATUS_OK; +} |