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batman-adv: Unify the first 3 bytes in each packet

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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 <ordex@autistici.org>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
This commit is contained in:
Antonio Quartulli 2011-05-28 14:51:06 +02:00 committed by Sven Eckelmann
parent b4e1705417
commit 3b27ffb00f
1 changed files with 19 additions and 13 deletions
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32
net/batman-adv/packet.h
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@ -34,7 +34,7 @@ enum bat_packettype {
};
/* this file is included by batctl which needs these defines */
#define COMPAT_VERSION 12
#define COMPAT_VERSION 14
enum batman_flags {
PRIMARIES_FIRST_HOP = 1 << 4,
@ -66,15 +66,15 @@ enum unicast_frag_flags {
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)
@ -82,12 +82,13 @@ 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
@ -97,8 +98,8 @@ 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;
@ -110,16 +111,19 @@ 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 reserved;
uint8_t dest[6];
uint8_t flags;
uint8_t align;
uint8_t orig[6];
uint16_t seqno;
} __packed;
@ -127,18 +131,20 @@ 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 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 vis_type; /* which type of vis-participant sent this? */
uint32_t seqno; /* sequence number */
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 */