/* IP constants */
-#define IP_HLEN 20
#define IP_VER 4
#define IP_MASK_VER 0xf0
#define IP_MASK_HLEN 0x0f
#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,
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 */
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 );
}
/**