icmp.h

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/*
** icmp.h for  in /home/anoman/work/lse/lseos/lseos-net/inet
** 
** Copyright (c)2004 Arthur Kopatsy
** Login   <kopats_a@epita.fr>
** 
** Started on  Wed Oct 20 14:49:39 2004 Arthur Kopatsy
** Last update Fri Dec  3 23:29:22 2004 Arthur Kopatsy
*/

#ifndef ICMP_H_
#define ICMP_H_

struct s_icmp_hdr
{
  u_int8_t              icmp_type;
  u_int8_t              icmp_code;
  u_int16_t             icmp_sum;
  union {
    struct {
      u_int16_t icmp_id;
      u_int16_t icmp_seq;
    } icmp_echo;
    u_int32_t   icmp_gw;
    struct {
      u_int16_t icmp_unused;
      u_int16_t icmp_mtu;
    } icmp_frag;
  } icmp_info;
} __attribute__ ((packed));

#define ICMP_HEADER_LEN sizeof (struct s_icmp_hdr)

#ifdef __INET__

struct s_icmp_action
{
  u_int8_t              icmp_type;
  void                  (*icmp_action)(struct s_pkbuf *pk);
};

struct s_icmp_snd
{
  TAILQ_ENTRY(s_icmp_snd)       icmp_next;
  struct s_data_buf             *icmp_data;
  size_t                        icmp_data_size;
};

TAILQ_HEAD(s_icmp_sndq, s_icmp_snd);

struct s_icmp_pcb
{
  LIST_ENTRY(s_icmp_pcb)        icmp_next;
  int                           icmp_lock;
  struct s_in_pcb               *icmp_in_pcb;
  struct s_pkq                  icmp_rcvq;
  struct s_icmp_sndq            icmp_sndq;
  int64_t                       icmp_holders;
};

LIST_HEAD(s_icmp_pcb_list, s_icmp_pcb);

struct s_icmp_proto_info
{
  struct s_in_pcb_list          in_pcb;
  struct s_icmp_pcb_list        icmp_pcb;
};

#endif

/* 
** ICMP types
*/

#define ICMP_REPLY              0
#define ICMP_ECHO               8
#define ICMP_DEST_UNREACH       3

/*
** Codes for UNREACH
*/

#define ICMP_NET_UNREACH        0       /* Network Unreachable          */
#define ICMP_HOST_UNREACH       1       /* Host Unreachable             */
#define ICMP_PROT_UNREACH       2       /* Protocol Unreachable         */
#define ICMP_PORT_UNREACH       3       /* Port Unreachable             */
#define ICMP_FRAG_NEEDED        4       /* Fragmentation Needed/DF set  */
#define ICMP_SR_FAILED          5       /* Source Route failed          */
#define ICMP_NET_UNKNOWN        6
#define ICMP_HOST_UNKNOWN       7
#define ICMP_HOST_ISOLATED      8
#define ICMP_NET_ANO            9
#define ICMP_HOST_ANO           10
#define ICMP_NET_UNR_TOS        11
#define ICMP_HOST_UNR_TOS       12
#define ICMP_PKT_FILTERED       13      /* Packet filtered */
#define ICMP_PREC_VIOLATION     14      /* Precedence violation */
#define ICMP_PREC_CUTOFF        15      /* Precedence cut off */
#define NR_ICMP_UNREACH         15      /* instead of hardcoding immediate value */

/* PROTO icmp.c */
#ifdef __INET__
/* icmp.c */
void icmp_proto_init(void);
int icmp_attach(struct s_socket *so);
int icmp_detach(struct s_socket *so);
int icmp_send(struct s_socket *so, struct s_data_buf *data, size_t data_size, struct sockaddr *sa, socklen_t salen);
size_t icmp_recv(struct s_socket *so, pid_t pid, struct sockaddr *sa, socklen_t *salen, vaddr_t uaddr, size_t usize);
void icmp_unreach_send(struct in_addr *dst_addr, u_int8_t code);
void icmp_echo(struct s_pkbuf *pk);
void icmp_dump(struct s_pkbuf *pk);
int aa_icmp_input(struct s_pkbuf *pk);
#endif /* __INET__ */
#endif

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