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new experimental branch with changed MMU behaviour

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This commit is contained in:
Markus Fröschle
2014-09-25 08:00:36 +00:00
parent a2f01a7fa4
commit db847ec588
246 changed files with 117874 additions and 0 deletions
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80
Bas_gcc_mmu/include/ip.h Normal file
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/*
* File: ip.h
* Purpose: Definitions for the Internet Protocol, IP.
*
* Notes: See RFC 791 "DARPA Internet Program Protocol
* Specification" for more details.
*/
#ifndef _IP_H
#define _IP_H
/* 32-bit IP Addresses */
typedef uint8_t IP_ADDR[4];
/* Pointer to an IP Address */
typedef uint8_t IP_ADDR_P[];
/* Definition of an IP packet header */
typedef struct
{
uint8_t version_ihl;
uint8_t service_type;
uint16_t total_length;
uint16_t identification;
uint16_t flags_frag_offset;
uint8_t ttl;
uint8_t protocol;
uint16_t checksum;
IP_ADDR source_addr;
IP_ADDR dest_addr;
uint8_t options; /* actually an array of undetermined length */
} ip_frame_hdr;
/* Macros for accessing an IP datagram. */
#define IP_VERSION(a) ((a->version_ihl & 0x00F0) >> 4)
#define IP_IHL(a) ((a->version_ihl & 0x000F))
#define IP_SERVICE(a) (a->service_type)
#define IP_LENGTH(a) (a->total_length)
#define IP_IDENT(a) (a->identification)
#define IP_FLAGS(a) ((a->flags_frag_offset & 0x0000E000) >> 13)
#define IP_FRAGMENT(a) ((a->flags_frag_offset & 0x00001FFF))
#define IP_TTL(a) (a->ttl)
#define IP_PROTOCOL(a) (a->protocol)
#define IP_CHKSUM(a) (a->checksum)
#define IP_SRC(a) (&a->source_addr[0])
#define IP_DEST(a) (&a->dest_addr[0])
#define IP_OPTIONS(a) (&a->options)
#define IP_DATA(a) (&((uint8_t *)a)[IP_IHL(a) * 4])
/* Defined IP protocols */
#define IP_PROTO_ICMP (1)
#define IP_PROTO_UDP (17)
/* Protocol Header information */
#define IP_HDR_OFFSET ETH_HDR_LEN
#define IP_HDR_SIZE 20 /* no options */
typedef struct
{
IP_ADDR myip;
IP_ADDR gateway;
IP_ADDR netmask;
IP_ADDR broadcast;
unsigned int rx;
unsigned int rx_unsup;
unsigned int tx;
unsigned int err;
} IP_INFO;
extern void ip_handler(NIF *nif, NBUF *nbf);
uint16_t ip_chksum(uint16_t *data, int num);
extern int ip_send(NIF *nif, uint8_t *dest_addr, uint8_t *src_addr, uint8_t protocol, NBUF *nbf);
extern void ip_init(IP_INFO *, IP_ADDR_P, IP_ADDR_P, IP_ADDR_P);
extern uint8_t *ip_get_myip(IP_INFO *);
extern uint8_t *ip_resolve_route(NIF *, IP_ADDR_P);
#endif /* _IP_H */