LXR qemu/slirp/src/slirp.h

   1/* SPDX-License-Identifier: BSD-3-Clause */
   2#ifndef SLIRP_H
   3#define SLIRP_H
   4
   5#ifdef _WIN32
   6
   7/* as defined in sdkddkver.h */
   8#ifndef _WIN32_WINNT
   9#define _WIN32_WINNT 0x0600 /* Vista */
  10#endif
  11/* reduces the number of implicitly included headers */
  12#ifndef WIN32_LEAN_AND_MEAN
  13#define WIN32_LEAN_AND_MEAN
  14#endif
  15
  16# include <winsock2.h>
  17# include <windows.h>
  18# include <ws2tcpip.h>
  19# include <sys/timeb.h>
  20# include <iphlpapi.h>
  21
  22#else
  23# if !defined(__HAIKU__)
  24#  define O_BINARY 0
  25# endif
  26#endif
  27
  28#ifndef _WIN32
  29#include <sys/uio.h>
  30#include <netinet/in.h>
  31#include <arpa/inet.h>
  32#include <sys/socket.h>
  33#include <sys/ioctl.h>
  34#endif
  35
  36#ifdef __APPLE__
  37# include <sys/filio.h>
  38#endif
  39
  40/* Avoid conflicting with the libc insque() and remque(), which
  41   have different prototypes. */
  42#define insque slirp_insque
  43#define remque slirp_remque
  44#define quehead slirp_quehead
  45
  46#include "debug.h"
  47#include "util.h"
  48#include "qtailq.h"
  49
  50#include "libslirp.h"
  51#include "ip.h"
  52#include "ip6.h"
  53#include "tcp.h"
  54#include "tcp_timer.h"
  55#include "tcp_var.h"
  56#include "tcpip.h"
  57#include "udp.h"
  58#include "ip_icmp.h"
  59#include "ip6_icmp.h"
  60#include "mbuf.h"
  61#include "sbuf.h"
  62#include "socket.h"
  63#include "if.h"
  64#include "main.h"
  65#include "misc.h"
  66
  67#include "bootp.h"
  68#include "tftp.h"
  69
  70#define ARPOP_REQUEST 1         /* ARP request */
  71#define ARPOP_REPLY   2         /* ARP reply   */
  72
  73struct ethhdr {
  74    unsigned char  h_dest[ETH_ALEN];   /* destination eth addr */
  75    unsigned char  h_source[ETH_ALEN]; /* source ether addr    */
  76    unsigned short h_proto;            /* packet type ID field */
  77};
  78
  79struct slirp_arphdr {
  80    unsigned short ar_hrd;      /* format of hardware address */
  81    unsigned short ar_pro;      /* format of protocol address */
  82    unsigned char  ar_hln;      /* length of hardware address */
  83    unsigned char  ar_pln;      /* length of protocol address */
  84    unsigned short ar_op;       /* ARP opcode (command)       */
  85
  86    /*
  87     *  Ethernet looks like this : This bit is variable sized however...
  88     */
  89    unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
  90    uint32_t      ar_sip;           /* sender IP address       */
  91    unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
  92    uint32_t      ar_tip;           /* target IP address       */
  93} SLIRP_PACKED;
  94
  95#define ARP_TABLE_SIZE 16
  96
  97typedef struct ArpTable {
  98    struct slirp_arphdr table[ARP_TABLE_SIZE];
  99    int next_victim;
 100} ArpTable;
 101
 102void arp_table_add(Slirp *slirp, uint32_t ip_addr, uint8_t ethaddr[ETH_ALEN]);
 103
 104bool arp_table_search(Slirp *slirp, uint32_t ip_addr,
 105                      uint8_t out_ethaddr[ETH_ALEN]);
 106
 107struct ndpentry {
 108    unsigned char   eth_addr[ETH_ALEN];     /* sender hardware address */
 109    struct in6_addr ip_addr;                /* sender IP address       */
 110};
 111
 112#define NDP_TABLE_SIZE 16
 113
 114typedef struct NdpTable {
 115    struct ndpentry table[NDP_TABLE_SIZE];
 116    int next_victim;
 117} NdpTable;
 118
 119void ndp_table_add(Slirp *slirp, struct in6_addr ip_addr,
 120                   uint8_t ethaddr[ETH_ALEN]);
 121bool ndp_table_search(Slirp *slirp, struct in6_addr ip_addr,
 122                      uint8_t out_ethaddr[ETH_ALEN]);
 123
 124struct Slirp {
 125    QTAILQ_ENTRY(Slirp) entry;
 126    unsigned time_fasttimo;
 127    unsigned last_slowtimo;
 128    bool do_slowtimo;
 129
 130    bool in_enabled, in6_enabled;
 131
 132    /* virtual network configuration */
 133    struct in_addr vnetwork_addr;
 134    struct in_addr vnetwork_mask;
 135    struct in_addr vhost_addr;
 136    struct in6_addr vprefix_addr6;
 137    uint8_t vprefix_len;
 138    struct in6_addr vhost_addr6;
 139    struct in_addr vdhcp_startaddr;
 140    struct in_addr vnameserver_addr;
 141    struct in6_addr vnameserver_addr6;
 142
 143    struct in_addr client_ipaddr;
 144    char client_hostname[33];
 145
 146    int restricted;
 147    struct gfwd_list *guestfwd_list;
 148
 149    /* mbuf states */
 150    struct quehead m_freelist;
 151    struct quehead m_usedlist;
 152    int mbuf_alloced;
 153
 154    /* if states */
 155    struct quehead if_fastq;   /* fast queue (for interactive data) */
 156    struct quehead if_batchq;  /* queue for non-interactive data */
 157    bool if_start_busy;     /* avoid if_start recursion */
 158
 159    /* ip states */
 160    struct ipq ipq;         /* ip reass. queue */
 161    uint16_t ip_id;         /* ip packet ctr, for ids */
 162
 163    /* bootp/dhcp states */
 164    BOOTPClient bootp_clients[NB_BOOTP_CLIENTS];
 165    char *bootp_filename;
 166    size_t vdnssearch_len;
 167    uint8_t *vdnssearch;
 168    char *vdomainname;
 169
 170    /* tcp states */
 171    struct socket tcb;
 172    struct socket *tcp_last_so;
 173    tcp_seq tcp_iss;        /* tcp initial send seq # */
 174    uint32_t tcp_now;       /* for RFC 1323 timestamps */
 175
 176    /* udp states */
 177    struct socket udb;
 178    struct socket *udp_last_so;
 179
 180    /* icmp states */
 181    struct socket icmp;
 182    struct socket *icmp_last_so;
 183
 184    /* tftp states */
 185    char *tftp_prefix;
 186    struct tftp_session tftp_sessions[TFTP_SESSIONS_MAX];
 187    char *tftp_server_name;
 188
 189    ArpTable arp_table;
 190    NdpTable ndp_table;
 191
 192    GRand *grand;
 193    void *ra_timer;
 194
 195    const SlirpCb *cb;
 196    void *opaque;
 197};
 198
 199void if_start(Slirp *);
 200
 201int get_dns_addr(struct in_addr *pdns_addr);
 202int get_dns6_addr(struct in6_addr *pdns6_addr, uint32_t *scope_id);
 203
 204/* ncsi.c */
 205void ncsi_input(Slirp *slirp, const uint8_t *pkt, int pkt_len);
 206
 207#ifndef _WIN32
 208#include <netdb.h>
 209#endif
 210
 211
 212extern bool slirp_do_keepalive;
 213
 214#define TCP_MAXIDLE (TCPTV_KEEPCNT * TCPTV_KEEPINTVL)
 215
 216/* dnssearch.c */
 217int translate_dnssearch(Slirp *s, const char ** names);
 218
 219/* cksum.c */
 220int cksum(struct mbuf *m, int len);
 221int ip6_cksum(struct mbuf *m);
 222
 223/* if.c */
 224void if_init(Slirp *);
 225void if_output(struct socket *, struct mbuf *);
 226
 227/* ip_input.c */
 228void ip_init(Slirp *);
 229void ip_cleanup(Slirp *);
 230void ip_input(struct mbuf *);
 231void ip_slowtimo(Slirp *);
 232void ip_stripoptions(register struct mbuf *, struct mbuf *);
 233
 234/* ip_output.c */
 235int ip_output(struct socket *, struct mbuf *);
 236
 237/* ip6_input.c */
 238void ip6_init(Slirp *);
 239void ip6_cleanup(Slirp *);
 240void ip6_input(struct mbuf *);
 241
 242/* ip6_output */
 243int ip6_output(struct socket *, struct mbuf *, int fast);
 244
 245/* tcp_input.c */
 246void tcp_input(register struct mbuf *, int, struct socket *, unsigned short af);
 247int tcp_mss(register struct tcpcb *, unsigned);
 248
 249/* tcp_output.c */
 250int tcp_output(register struct tcpcb *);
 251void tcp_setpersist(register struct tcpcb *);
 252
 253/* tcp_subr.c */
 254void tcp_init(Slirp *);
 255void tcp_cleanup(Slirp *);
 256void tcp_template(struct tcpcb *);
 257void tcp_respond(struct tcpcb *, register struct tcpiphdr *,
 258        register struct mbuf *, tcp_seq, tcp_seq, int, unsigned short);
 259struct tcpcb * tcp_newtcpcb(struct socket *);
 260struct tcpcb * tcp_close(register struct tcpcb *);
 261void tcp_sockclosed(struct tcpcb *);
 262int tcp_fconnect(struct socket *, unsigned short af);
 263void tcp_connect(struct socket *);
 264int tcp_attach(struct socket *);
 265uint8_t tcp_tos(struct socket *);
 266int tcp_emu(struct socket *, struct mbuf *);
 267int tcp_ctl(struct socket *);
 268struct tcpcb *tcp_drop(struct tcpcb *tp, int err);
 269
 270struct socket *
 271slirp_find_ctl_socket(Slirp *slirp, struct in_addr guest_addr, int guest_port);
 272
 273void slirp_send_packet_all(Slirp *slirp, const void *buf, size_t len);
 274
 275#endif
 276