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Diffstat (limited to 'test/packetdrill/ip.h')
| -rw-r--r-- | test/packetdrill/ip.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/test/packetdrill/ip.h b/test/packetdrill/ip.h new file mode 100644 index 0000000..0ffcf12 --- /dev/null +++ b/test/packetdrill/ip.h @@ -0,0 +1,108 @@ +/* + * 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) + * + * Our own IPv4 header declarations, so we have something that's + * portable and somewhat more readable than a typical system header + * file. + */ + +#ifndef __IP_HEADERS_H__ +#define __IP_HEADERS_H__ + +#include "types.h" + +struct ipv4 { +#if __BYTE_ORDER == __LITTLE_ENDIAN + __u8 ihl:4, + version:4; +#elif __BYTE_ORDER == __BIG_ENDIAN + __u8 version:4, + ihl:4; +#else +# error "Please fix endianness defines" +#endif + __u8 tos; + __be16 tot_len; + __be16 id; + __be16 frag_off; + __u8 ttl; + __u8 protocol; + __sum16 check; + struct in_addr src_ip; + struct in_addr dst_ip; +}; + +/* ----------------------- IP socket option values -------------------- */ + +/* Oddly enough, Linux distributions are typically missing even some + * of the older and more common IP socket options, such as IP_MTU. + */ +#ifdef linux +#define IP_TOS 1 +#define IP_TTL 2 +#define IP_HDRINCL 3 +#define IP_OPTIONS 4 +#define IP_ROUTER_ALERT 5 +#define IP_RECVOPTS 6 +#define IP_RETOPTS 7 +#define IP_PKTINFO 8 +#define IP_PKTOPTIONS 9 +#define IP_MTU_DISCOVER 10 +#define IP_RECVERR 11 +#define IP_RECVTTL 12 +#define IP_RECVTOS 13 +#define IP_MTU 14 +#define IP_FREEBIND 15 +#define IP_IPSEC_POLICY 16 +#define IP_XFRM_POLICY 17 +#define IP_PASSSEC 18 +#define IP_TRANSPARENT 19 +#endif /* linux */ + +/* ECN: RFC 3168: http://tools.ietf.org/html/rfc3168 */ +#define IP_ECN_MASK 3 +#define IP_ECN_NONE 0 +#define IP_ECN_ECT1 1 +#define IP_ECN_ECT0 2 +#define IP_ECN_CE 3 + +static inline u8 ipv4_tos_byte(const struct ipv4 *ipv4) +{ + return ipv4->tos; +} + +static inline u8 ipv4_ttl_byte(const struct ipv4 *ipv4) +{ + return ipv4->ttl; +} + +static inline int ipv4_header_len(const struct ipv4 *ipv4) +{ + return ipv4->ihl * sizeof(u32); +} + +/* IP fragmentation bit flags */ +#define IP_RF 0x8000 /* reserved fragment flag */ +#define IP_DF 0x4000 /* don't fragment flag */ +#define IP_MF 0x2000 /* more fragments flag */ +#define IP_OFFMASK 0x1FFF /* mask for fragmenting bits */ + +#endif /* __IP_HEADERS_H__ */ |