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Added ipv4_pseudo_header structure

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This commit is contained in:
Nikhil Chandru Rao 2006-06-28 09:59:27 +00:00
parent e60817fa7a
commit 6e2c97b0c0
2 changed files with 16 additions and 21 deletions
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18
src/include/gpxe/ip.h
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@ -11,7 +11,6 @@
/* IP constants */
#define IP_HLEN 20
#define IP_VER 4
#define IP_MASK_VER 0xf0
#define IP_MASK_HLEN 0x0f
@ -21,16 +20,20 @@
#define IP_TOS 0
#define IP_TTL 64
/* IP6 constants */
#define IP6_HLEN 38
/* IP4 pseudo header */
struct ipv4_pseudo_header {
struct in_addr src;
struct in_addr dest;
uint8_t zero_padding;
uint8_t protocol;
uint16_t len;
};
struct pk_buff;
struct net_device;
struct net_protocol;
extern struct net_protocol ipv4_protocol;
extern struct net_protocol ipv6_protocol;
extern int add_ipv4_address ( struct net_device *netdev,
struct in_addr address, struct in_addr netmask,
@ -38,11 +41,6 @@ extern int add_ipv4_address ( struct net_device *netdev,
extern void del_ipv4_address ( struct net_device *netdev );
extern int ipv4_uip_tx ( struct pk_buff *pkb );
extern int ipv4_tx ( struct pk_buff *pkb, uint16_t trans_proto, struct in_addr *dest );
extern int ipv6_tx ( struct pk_buff *pkb, uint16_t trans_proto, struct in6_addr *dest );
extern void ipv4_rx ( struct pk_buff *pkb, struct net_device *netdev, const void *ll_source );
extern void ipv6_rx ( struct pk_buff *pkb, struct net_device *netdev, const void *ll_source );
#endif /* _GPXE_IP_H */

19
src/net/ipv4.c
View File

@ -124,21 +124,18 @@ static void ipv4_dump ( struct iphdr *iphdr __unused ) {
void ipv4_tx_csum ( struct pk_buff *pkb, uint8_t trans_proto ) {
struct iphdr *iphdr = pkb->data;
void *pshdr = malloc ( IP_PSHLEN );
void *csum_offset = iphdr + IP_HLEN + ( trans_proto == IP_UDP ? 6 : 16 );
int offset = 0;
struct ipv4_pseudo_header pshdr;
void *csum_offset = iphdr + sizeof ( *iphdr ) + ( trans_proto == IP_UDP ? 6 : 16 );
/* Calculate pseudo header */
memcpy ( pshdr, &iphdr->src, sizeof ( in_addr ) );
offset += sizeof ( in_addr );
memcpy ( pshdr + offset, &iphdr->dest, sizeof ( in_addr ) );
offset += sizeof ( in_addr );
*( ( uint8_t* ) ( pshdr + offset++ ) ) = 0x00;
*( ( uint8_t* ) ( pshdr + offset++ ) ) = iphdr->protocol;
*( ( uint16_t* ) ( pshdr + offset ) ) = pkb_len ( pkb ) - IP_HLEN;
pshdr.src = iphdr->src;
pshdr.dest = iphdr->dest;
pshdr.zero_padding = 0x00;
pshdr.protocol = iphdr->protocol;
pshdr.len = htons ( pkb_len ( pkb ) - sizeof ( *iphdr ) );
/* Update the checksum value */
*( ( uint16_t* ) csum_offset ) = *( ( uint16_t* ) csum_offset ) + calc_chksum ( pshdr, IP_PSHLEN );
*( ( uint16_t* ) csum_offset ) = *( ( uint16_t* ) csum_offset ) + calc_chksum ( &pshdr, IP_PSHLEN );
}
/**