slirp/slirp.h

   1 #ifndef __COMMON_H__
   2 #define __COMMON_H__
   3
   4 #include "config-host.h"
   5 #include "slirp_config.h"
   6
   7 #ifdef _WIN32
   8 # include <inttypes.h>
   9
  10 typedef char *caddr_t;
  11
  12 # include <windows.h>
  13 # include <winsock2.h>
  14 # include <ws2tcpip.h>
  15 # include <sys/timeb.h>
  16 # include <iphlpapi.h>
  17
  18 #else
  19 # define ioctlsocket ioctl
  20 # define closesocket(s) close(s)
  21 # if !defined(__HAIKU__)
  22 #  define O_BINARY 0
  23 # endif
  24 #endif
  25
  26 #include <sys/types.h>
  27 #ifdef HAVE_SYS_BITYPES_H
  28 # include <sys/bitypes.h>
  29 #endif
  30
  31 #include <sys/time.h>
  32
  33 #ifdef HAVE_UNISTD_H
  34 # include <unistd.h>
  35 #endif
  36
  37 #ifdef HAVE_STDLIB_H
  38 # include <stdlib.h>
  39 #endif
  40
  41 #include <stdio.h>
  42 #include <errno.h>
  43
  44 #ifndef HAVE_MEMMOVE
  45 #define memmove(x, y, z) bcopy(y, x, z)
  46 #endif
  47
  48 #if TIME_WITH_SYS_TIME
  49 # include <sys/time.h>
  50 # include <time.h>
  51 #else
  52 # ifdef HAVE_SYS_TIME_H
  53 #  include <sys/time.h>
  54 # else
  55 #  include <time.h>
  56 # endif
  57 #endif
  58
  59 #ifdef HAVE_STRING_H
  60 # include <string.h>
  61 #else
  62 # include <strings.h>
  63 #endif
  64
  65 #ifndef _WIN32
  66 #include <sys/uio.h>
  67 #endif
  68
  69 #ifndef _WIN32
  70 #include <netinet/in.h>
  71 #include <arpa/inet.h>
  72 #endif
  73
  74 /* Systems lacking strdup() definition in <string.h>. */
  75 #if defined(ultrix)
  76 char *strdup(const char *);
  77 #endif
  78
  79 /* Systems lacking malloc() definition in <stdlib.h>. */
  80 #if defined(ultrix) || defined(hcx)
  81 void *malloc(size_t arg);
  82 void free(void *ptr);
  83 #endif
  84
  85 #include <fcntl.h>
  86 #ifndef NO_UNIX_SOCKETS
  87 #include <sys/un.h>
  88 #endif
  89 #include <signal.h>
  90 #ifdef HAVE_SYS_SIGNAL_H
  91 # include <sys/signal.h>
  92 #endif
  93 #ifndef _WIN32
  94 #include <sys/socket.h>
  95 #endif
  96
  97 #if defined(HAVE_SYS_IOCTL_H)
  98 # include <sys/ioctl.h>
  99 #endif
 100
 101 #ifdef HAVE_SYS_SELECT_H
 102 # include <sys/select.h>
 103 #endif
 104
 105 #ifdef HAVE_SYS_WAIT_H
 106 # include <sys/wait.h>
 107 #endif
 108
 109 #ifdef HAVE_SYS_FILIO_H
 110 # include <sys/filio.h>
 111 #endif
 112
 113 #ifdef USE_PPP
 114 #include <ppp/slirppp.h>
 115 #endif
 116
 117 #ifdef __STDC__
 118 #include <stdarg.h>
 119 #else
 120 #include <varargs.h>
 121 #endif
 122
 123 #include <sys/stat.h>
 124
 125 /* Avoid conflicting with the libc insque() and remque(), which
 126    have different prototypes. */
 127 #define insque slirp_insque
 128 #define remque slirp_remque
 129
 130 #ifdef HAVE_SYS_STROPTS_H
 131 #include <sys/stropts.h>
 132 #endif
 133
 134 #include "debug.h"
 135
 136 #include "qemu/queue.h"
 137 #include "qemu/sockets.h"
 138 #include "net/eth.h"
 139
 140 #include "libslirp.h"
 141 #include "ip.h"
 142 #include "tcp.h"
 143 #include "tcp_timer.h"
 144 #include "tcp_var.h"
 145 #include "tcpip.h"
 146 #include "udp.h"
 147 #include "ip_icmp.h"
 148 #include "mbuf.h"
 149 #include "sbuf.h"
 150 #include "socket.h"
 151 #include "if.h"
 152 #include "main.h"
 153 #include "misc.h"
 154 #ifdef USE_PPP
 155 #include "ppp/pppd.h"
 156 #include "ppp/ppp.h"
 157 #endif
 158
 159 #include "bootp.h"
 160 #include "tftp.h"
 161
 162 #define ARPOP_REQUEST 1         /* ARP request */
 163 #define ARPOP_REPLY   2         /* ARP reply   */
 164
 165 struct ethhdr {
 166     unsigned char  h_dest[ETH_ALEN];   /* destination eth addr */
 167     unsigned char  h_source[ETH_ALEN]; /* source ether addr    */
 168     unsigned short h_proto;            /* packet type ID field */
 169 };
 170
 171 struct arphdr {
 172     unsigned short ar_hrd;      /* format of hardware address */
 173     unsigned short ar_pro;      /* format of protocol address */
 174     unsigned char  ar_hln;      /* length of hardware address */
 175     unsigned char  ar_pln;      /* length of protocol address */
 176     unsigned short ar_op;       /* ARP opcode (command)       */
 177
 178     /*
 179      *  Ethernet looks like this : This bit is variable sized however...
 180      */
 181     unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
 182     uint32_t      ar_sip;           /* sender IP address       */
 183     unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
 184     uint32_t      ar_tip;           /* target IP address       */
 185 } QEMU_PACKED;
 186
 187 #define ARP_TABLE_SIZE 16
 188
 189 typedef struct ArpTable {
 190     struct arphdr table[ARP_TABLE_SIZE];
 191     int next_victim;
 192 } ArpTable;
 193
 194 void arp_table_add(Slirp *slirp, uint32_t ip_addr, uint8_t ethaddr[ETH_ALEN]);
 195
 196 bool arp_table_search(Slirp *slirp, uint32_t ip_addr,
 197                       uint8_t out_ethaddr[ETH_ALEN]);
 198
 199 struct Slirp {
 200     QTAILQ_ENTRY(Slirp) entry;
 201     u_int time_fasttimo;
 202     u_int last_slowtimo;
 203     bool do_slowtimo;
 204
 205     /* virtual network configuration */
 206     struct in_addr vnetwork_addr;
 207     struct in_addr vnetwork_mask;
 208     struct in_addr vhost_addr;
 209     struct in_addr vdhcp_startaddr;
 210     struct in_addr vnameserver_addr;
 211
 212     struct in_addr client_ipaddr;
 213     char client_hostname[33];
 214
 215     int restricted;
 216     struct ex_list *exec_list;
 217
 218     /* mbuf states */
 219     struct mbuf m_freelist, m_usedlist;
 220     int mbuf_alloced;
 221
 222     /* if states */
 223     struct mbuf if_fastq;   /* fast queue (for interactive data) */
 224     struct mbuf if_batchq;  /* queue for non-interactive data */
 225     struct mbuf *next_m;    /* pointer to next mbuf to output */
 226     bool if_start_busy;     /* avoid if_start recursion */
 227
 228     /* ip states */
 229     struct ipq ipq;         /* ip reass. queue */
 230     uint16_t ip_id;         /* ip packet ctr, for ids */
 231
 232     /* bootp/dhcp states */
 233     BOOTPClient bootp_clients[NB_BOOTP_CLIENTS];
 234     char *bootp_filename;
 235     size_t vdnssearch_len;
 236     uint8_t *vdnssearch;
 237
 238     /* tcp states */
 239     struct socket tcb;
 240     struct socket *tcp_last_so;
 241     tcp_seq tcp_iss;        /* tcp initial send seq # */
 242     uint32_t tcp_now;       /* for RFC 1323 timestamps */
 243
 244     /* udp states */
 245     struct socket udb;
 246     struct socket *udp_last_so;
 247
 248     /* icmp states */
 249     struct socket icmp;
 250     struct socket *icmp_last_so;
 251
 252     /* tftp states */
 253     char *tftp_prefix;
 254     struct tftp_session tftp_sessions[TFTP_SESSIONS_MAX];
 255
 256     ArpTable arp_table;
 257
 258     void *opaque;
 259 };
 260
 261 extern Slirp *slirp_instance;
 262
 263 #ifndef NULL
 264 #define NULL (void *)0
 265 #endif
 266
 267 #ifndef FULL_BOLT
 268 void if_start(Slirp *);
 269 #else
 270 void if_start(struct ttys *);
 271 #endif
 272
 273 #ifndef HAVE_STRERROR
 274  char *strerror(int error);
 275 #endif
 276
 277 #ifndef HAVE_INDEX
 278  char *index(const char *, int);
 279 #endif
 280
 281 #ifndef HAVE_GETHOSTID
 282  long gethostid(void);
 283 #endif
 284
 285 #ifndef _WIN32
 286 #include <netdb.h>
 287 #endif
 288
 289 #define DEFAULT_BAUD 115200
 290
 291 #define SO_OPTIONS DO_KEEPALIVE
 292 #define TCP_MAXIDLE (TCPTV_KEEPCNT * TCPTV_KEEPINTVL)
 293
 294 /* dnssearch.c */
 295 int translate_dnssearch(Slirp *s, const char ** names);
 296
 297 /* cksum.c */
 298 int cksum(struct mbuf *m, int len);
 299
 300 /* if.c */
 301 void if_init(Slirp *);
 302 void if_output(struct socket *, struct mbuf *);
 303
 304 /* ip_input.c */
 305 void ip_init(Slirp *);
 306 void ip_cleanup(Slirp *);
 307 void ip_input(struct mbuf *);
 308 void ip_slowtimo(Slirp *);
 309 void ip_stripoptions(register struct mbuf *, struct mbuf *);
 310
 311 /* ip_output.c */
 312 int ip_output(struct socket *, struct mbuf *);
 313
 314 /* tcp_input.c */
 315 void tcp_input(register struct mbuf *, int, struct socket *);
 316 int tcp_mss(register struct tcpcb *, u_int);
 317
 318 /* tcp_output.c */
 319 int tcp_output(register struct tcpcb *);
 320 void tcp_setpersist(register struct tcpcb *);
 321
 322 /* tcp_subr.c */
 323 void tcp_init(Slirp *);
 324 void tcp_cleanup(Slirp *);
 325 void tcp_template(struct tcpcb *);
 326 void tcp_respond(struct tcpcb *, register struct tcpiphdr *, register struct mbuf *, tcp_seq, tcp_seq, int);
 327 struct tcpcb * tcp_newtcpcb(struct socket *);
 328 struct tcpcb * tcp_close(register struct tcpcb *);
 329 void tcp_sockclosed(struct tcpcb *);
 330 int tcp_fconnect(struct socket *, unsigned short af);
 331 void tcp_connect(struct socket *);
 332 int tcp_attach(struct socket *);
 333 uint8_t tcp_tos(struct socket *);
 334 int tcp_emu(struct socket *, struct mbuf *);
 335 int tcp_ctl(struct socket *);
 336 struct tcpcb *tcp_drop(struct tcpcb *tp, int err);
 337
 338 #ifdef USE_PPP
 339 #define MIN_MRU MINMRU
 340 #define MAX_MRU MAXMRU
 341 #else
 342 #define MIN_MRU 128
 343 #define MAX_MRU 16384
 344 #endif
 345
 346 #ifndef _WIN32
 347 #define min(x,y) ((x) < (y) ? (x) : (y))
 348 #define max(x,y) ((x) > (y) ? (x) : (y))
 349 #endif
 350
 351 #ifdef _WIN32
 352 #undef errno
 353 #define errno (WSAGetLastError())
 354 #endif
 355
 356 #endif