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Code

ICMP structures __packed__

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This commit is contained in:
Michal Zima 2012-04-02 19:56:49 +02:00
parent 2cf43864d7
commit 0157236357
2 changed files with 6 additions and 6 deletions
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4
src/icmp.c
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@ -130,8 +130,8 @@ int icmp_ipv4(struct s_ethernet *eth4, struct s_ipv4 *ip4,
IPPROTO_ICMPV6, (unsigned char *) icmp); IPPROTO_ICMPV6, (unsigned char *) icmp);
/* copy the payload data (with new checksum) */ /* copy the payload data (with new checksum) */
memcpy(packet + sizeof(struct s_ethernet) + sizeof(struct s_ipv6), payload, memcpy(packet + sizeof(struct s_ethernet) + sizeof(struct s_ipv6),
payload_size); payload, payload_size);
/* send translated packet */ /* send translated packet */
transmit_raw(packet, sizeof(struct s_ethernet) + sizeof(struct s_ipv6) + transmit_raw(packet, sizeof(struct s_ethernet) + sizeof(struct s_ipv6) +

8
src/icmp.h
View File

@ -49,19 +49,19 @@ struct s_icmp {
unsigned char type; /* 8 b; ICMP type */ unsigned char type; /* 8 b; ICMP type */
unsigned char code; /* 8 b; subtype of ICMP type */ unsigned char code; /* 8 b; subtype of ICMP type */
unsigned short checksum; /* 16 b */ unsigned short checksum; /* 16 b */
}; } __attribute__ ((__packed__));
/* ICMP echo structure */ /* ICMP echo structure */
struct s_icmp_echo { struct s_icmp_echo {
unsigned short id; /* 16 b; ID value */ unsigned short id; /* 16 b; ID value */
unsigned short seq; /* 16 b; sequence number */ unsigned short seq; /* 16 b; sequence number */
}; } __attribute__ ((__packed__));
/* ICMP NDP NS structure */ /* ICMP NDP NS structure */
struct s_icmp_ndp_ns { struct s_icmp_ndp_ns {
unsigned int zeros; /* 32 b; reserved section */ unsigned int zeros; /* 32 b; reserved section */
struct s_ipv6_addr target; /* 128 b; target IP address */ struct s_ipv6_addr target; /* 128 b; target IP address */
}; } __attribute__ ((__packed__));
/* ICMP NDP NA structure */ /* ICMP NDP NA structure */
struct s_icmp_ndp_na { struct s_icmp_ndp_na {
@ -72,7 +72,7 @@ struct s_icmp_ndp_na {
unsigned char opt_len; /* 8 b; option -- length */ unsigned char opt_len; /* 8 b; option -- length */
struct s_mac_addr opt_tlla; /* 48 b; option -- target struct s_mac_addr opt_tlla; /* 48 b; option -- target
link-layer address */ link-layer address */
}; } __attribute__ ((__packed__));
int icmp_ipv4(struct s_ethernet *eth, struct s_ipv4 *ip4, char *payload, int icmp_ipv4(struct s_ethernet *eth, struct s_ipv4 *ip4, char *payload,
unsigned short payload_size); unsigned short payload_size);