Network support library (net.c)
[Network Library]

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Detailed Description

 #include "net/net.h" 

Description

This is a general network support library including a multitude of structure definitions for various types of network packets, functions and macros for switching byte order, and an RFC-compliant function for calculating checksums.

Data Structures
struct	netEthAddr
struct	netEthHeader
struct	netArpHeader
struct	netIpHeader
struct	netIcmpHeader
struct	netUdpHeader
struct	netTcpHeader
struct	netEthArpHeader
struct	netEthIpHeader
struct	tcpip_hdr
struct	icmpip_hdr
struct	udpip_hdr
Defines
#define	ETH_HEADER_LEN   14
#define	ETHTYPE_ARP   0x0806
#define	ETHTYPE_IP   0x0800
#define	ETHTYPE_IP6   0x86dd
#define	ARP_OPCODE_REQUEST   1
#define	ARP_OPCODE_REPLY   2
#define	ARP_HWTYPE_ETH   1
#define	IP_HEADER_LEN   20
#define	IP_PROTO_ICMP   1
#define	IP_PROTO_TCP   6
#define	IP_PROTO_UDP   17
#define	ICMP_HEADER_LEN   8
#define	ICMP_TYPE_ECHOREPLY   0
#define	ICMP_TYPE_ECHOREQUEST   8
#define	UDP_HEADER_LEN   8
#define	TCP_HEADER_LEN   20
#define	TCP_FLAGS_FIN   0x01
#define	TCP_FLAGS_SYN   0x02
#define	TCP_FLAGS_RST   0x04
#define	TCP_FLAGS_PSH   0x08
#define	TCP_FLAGS_ACK   0x10
#define	TCP_FLAGS_URG   0x20
#define	IPDOT(a, b, c, d)   ((a<<24)|(b<<16)|(c<<8)|(d))
#define	HTONS(s)   ((s<<8) | (s>>8))
	Host-to-Network SHORT (16-bit) byte-order swap (macro).
#define	HTONL(l)   ((l<<24) | ((l&0x00FF0000l)>>8) | ((l&0x0000FF00l)<<8) | (l>>24))
	Host-to-Network LONG (32-bit) byte-order swap (macro).
Typedefs
typedef netIpHeader	ip_hdr
Functions
uint16_t	htons (uint16_t val)
	Host-to-Network SHORT (16-bit) byte-order swap (function).
uint32_t	htonl (uint32_t val)
	Host-to-Network LONG (32-bit) byte-order swap (function).
uint16_t	netChecksum (void *data, uint16_t len)
	Calculate IP-style checksum from data.
void	netPrintEthAddr (struct netEthAddr *ethaddr)
	Print Ethernet address in XX:XX:XX:XX:XX:XX format.
void	netPrintIPAddr (uint32_t ipaddr)
	Print IP address in dot notation.
void	netPrintEthHeader (struct netEthHeader *eth_hdr)
	Print Ethernet header information.
void	netPrintIpHeader (struct netIpHeader *ipheader)
	Print IP header information.
void	netPrintTcpHeader (struct netTcpHeader *tcpheader)
	Print TCP header information.
Variables
netEthAddr	GNUC_PACKED

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Define Documentation

#define IPDOT (  a, b, c, d   )     ((a<<24)|(b<<16)|(c<<8)|(d))

Convert dot-notation IP address into 32-bit word. Example: IPDOT(192l,168l,1l,1l) Definition at line 178 of file net.h.

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