From: Antonio Quartulli <or...@autistici.org>
The amount of duplicated code in the receive and routing code can be reduced
when all headers provide the packet type, version and ttl in the same first
bytes.
Signed-off-by: Antonio Quartulli <or...@autistici.org>
---
* reduce to 3 bytes, but still keep alignments
* corrected vis_packet
packet.h | 28 ++++++++++++++++------------
1 files changed, 16 insertions(+), 12 deletions(-)
diff --git a/packet.h b/packet.h
index eda9965..ede441b 100644
--- a/packet.h
+++ b/packet.h
@@ -32,7 +32,7 @@
#define BAT_UNICAST_FRAG 0x06
/* this file is included by batctl which needs these defines */
-#define COMPAT_VERSION 12
+#define COMPAT_VERSION 14
#define DIRECTLINK 0x40
#define VIS_SERVER 0x20
#define PRIMARIES_FIRST_HOP 0x10
@@ -55,15 +55,15 @@
struct batman_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
+ uint8_t ttl;
uint8_t flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
- uint8_t tq;
uint32_t seqno;
uint8_t orig[6];
uint8_t prev_sender[6];
- uint8_t ttl;
- uint8_t num_tt;
uint8_t gw_flags; /* flags related to gateway class */
- uint8_t align;
+ uint8_t tq;
+ uint8_t num_tt;
+ uint8_t reserved;
} __packed;
#define BAT_PACKET_LEN sizeof(struct batman_packet)
@@ -71,12 +71,13 @@ struct batman_packet {
struct icmp_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
- uint8_t msg_type; /* see ICMP message types above */
uint8_t ttl;
+ uint8_t msg_type; /* see ICMP message types above */
uint8_t dst[6];
uint8_t orig[6];
uint16_t seqno;
uint8_t uid;
+ uint8_t reserved;
} __packed;
#define BAT_RR_LEN 16
@@ -86,8 +87,8 @@ struct icmp_packet {
struct icmp_packet_rr {
uint8_t packet_type;
uint8_t version; /* batman version field */
- uint8_t msg_type; /* see ICMP message types above */
uint8_t ttl;
+ uint8_t msg_type; /* see ICMP message types above */
uint8_t dst[6];
uint8_t orig[6];
uint16_t seqno;
@@ -99,16 +100,17 @@ struct icmp_packet_rr {
struct unicast_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
- uint8_t dest[6];
uint8_t ttl;
+ uint8_t reserved;
+ uint8_t dest[6];
} __packed;
struct unicast_frag_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
- uint8_t dest[6];
uint8_t ttl;
uint8_t flags;
+ uint8_t dest[6];
uint8_t orig[6];
uint16_t seqno;
} __packed;
@@ -116,18 +118,20 @@ struct unicast_frag_packet {
struct bcast_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
- uint8_t orig[6];
uint8_t ttl;
+ uint8_t reserved;
uint32_t seqno;
+ uint8_t orig[6];
} __packed;
struct vis_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
+ uint8_t ttl; /* TTL */
uint8_t vis_type; /* which type of vis-participant sent this? */
- uint8_t entries; /* number of entries behind this struct */
uint32_t seqno; /* sequence number */
- uint8_t ttl; /* TTL */
+ uint8_t entries; /* number of entries behind this struct */
+ uint8_t reserved;
uint8_t vis_orig[6]; /* originator that announces its neighbors */
uint8_t target_orig[6]; /* who should receive this packet */
uint8_t sender_orig[6]; /* who sent or rebroadcasted this packet */
--
1.7.5.1
