Added ipv4_pseudo_header structure
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@ -11,7 +11,6 @@
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/* IP constants */
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/* IP constants */
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#define IP_HLEN 20
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#define IP_VER 4
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#define IP_VER 4
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#define IP_MASK_VER 0xf0
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#define IP_MASK_VER 0xf0
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#define IP_MASK_HLEN 0x0f
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#define IP_MASK_HLEN 0x0f
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@ -21,16 +20,20 @@
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#define IP_TOS 0
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#define IP_TOS 0
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#define IP_TTL 64
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#define IP_TTL 64
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/* IP6 constants */
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/* IP4 pseudo header */
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struct ipv4_pseudo_header {
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#define IP6_HLEN 38
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struct in_addr src;
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struct in_addr dest;
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uint8_t zero_padding;
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uint8_t protocol;
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uint16_t len;
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};
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struct pk_buff;
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struct pk_buff;
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struct net_device;
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struct net_device;
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struct net_protocol;
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struct net_protocol;
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extern struct net_protocol ipv4_protocol;
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extern struct net_protocol ipv4_protocol;
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extern struct net_protocol ipv6_protocol;
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extern int add_ipv4_address ( struct net_device *netdev,
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extern int add_ipv4_address ( struct net_device *netdev,
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struct in_addr address, struct in_addr netmask,
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struct in_addr address, struct in_addr netmask,
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@ -38,11 +41,6 @@ extern int add_ipv4_address ( struct net_device *netdev,
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extern void del_ipv4_address ( struct net_device *netdev );
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extern void del_ipv4_address ( struct net_device *netdev );
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extern int ipv4_uip_tx ( struct pk_buff *pkb );
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extern int ipv4_uip_tx ( struct pk_buff *pkb );
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extern int ipv4_tx ( struct pk_buff *pkb, uint16_t trans_proto, struct in_addr *dest );
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extern int ipv4_tx ( struct pk_buff *pkb, uint16_t trans_proto, struct in_addr *dest );
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extern int ipv6_tx ( struct pk_buff *pkb, uint16_t trans_proto, struct in6_addr *dest );
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extern void ipv4_rx ( struct pk_buff *pkb, struct net_device *netdev, const void *ll_source );
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extern void ipv6_rx ( struct pk_buff *pkb, struct net_device *netdev, const void *ll_source );
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#endif /* _GPXE_IP_H */
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#endif /* _GPXE_IP_H */
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@ -124,21 +124,18 @@ static void ipv4_dump ( struct iphdr *iphdr __unused ) {
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void ipv4_tx_csum ( struct pk_buff *pkb, uint8_t trans_proto ) {
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void ipv4_tx_csum ( struct pk_buff *pkb, uint8_t trans_proto ) {
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struct iphdr *iphdr = pkb->data;
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struct iphdr *iphdr = pkb->data;
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void *pshdr = malloc ( IP_PSHLEN );
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struct ipv4_pseudo_header pshdr;
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void *csum_offset = iphdr + IP_HLEN + ( trans_proto == IP_UDP ? 6 : 16 );
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void *csum_offset = iphdr + sizeof ( *iphdr ) + ( trans_proto == IP_UDP ? 6 : 16 );
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int offset = 0;
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/* Calculate pseudo header */
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/* Calculate pseudo header */
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memcpy ( pshdr, &iphdr->src, sizeof ( in_addr ) );
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pshdr.src = iphdr->src;
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offset += sizeof ( in_addr );
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pshdr.dest = iphdr->dest;
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memcpy ( pshdr + offset, &iphdr->dest, sizeof ( in_addr ) );
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pshdr.zero_padding = 0x00;
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offset += sizeof ( in_addr );
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pshdr.protocol = iphdr->protocol;
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*( ( uint8_t* ) ( pshdr + offset++ ) ) = 0x00;
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pshdr.len = htons ( pkb_len ( pkb ) - sizeof ( *iphdr ) );
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*( ( uint8_t* ) ( pshdr + offset++ ) ) = iphdr->protocol;
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*( ( uint16_t* ) ( pshdr + offset ) ) = pkb_len ( pkb ) - IP_HLEN;
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/* Update the checksum value */
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/* Update the checksum value */
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*( ( uint16_t* ) csum_offset ) = *( ( uint16_t* ) csum_offset ) + calc_chksum ( pshdr, IP_PSHLEN );
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*( ( uint16_t* ) csum_offset ) = *( ( uint16_t* ) csum_offset ) + calc_chksum ( &pshdr, IP_PSHLEN );
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}
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}
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/**
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/**
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