LXR qemu/net/util.h

   1/*
   2 * QEMU System Emulator
   3 *
   4 * Copyright (c) 2003-2008 Fabrice Bellard
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a copy
   7 * of this software and associated documentation files (the "Software"), to deal
   8 * in the Software without restriction, including without limitation the rights
   9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 * copies of the Software, and to permit persons to whom the Software is
  11 * furnished to do so, subject to the following conditions:
  12 *
  13 * The above copyright notice and this permission notice shall be included in
  14 * all copies or substantial portions of the Software.
  15 *
  16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 * THE SOFTWARE.
  23 */
  24
  25#ifndef QEMU_NET_UTIL_H
  26#define QEMU_NET_UTIL_H
  27
  28
  29/*
  30 * Structure of an internet header, naked of options.
  31 */
  32struct ip {
  33#ifdef HOST_WORDS_BIGENDIAN
  34    uint8_t ip_v:4,         /* version */
  35            ip_hl:4;        /* header length */
  36#else
  37    uint8_t ip_hl:4,        /* header length */
  38            ip_v:4;         /* version */
  39#endif
  40    uint8_t ip_tos;         /* type of service */
  41    uint16_t ip_len;        /* total length */
  42    uint16_t ip_id;         /* identification */
  43    uint16_t ip_off;        /* fragment offset field */
  44#define IP_DF 0x4000        /* don't fragment flag */
  45#define IP_MF 0x2000        /* more fragments flag */
  46#define IP_OFFMASK 0x1fff   /* mask for fragmenting bits */
  47    uint8_t ip_ttl;         /* time to live */
  48    uint8_t ip_p;           /* protocol */
  49    uint16_t ip_sum;        /* checksum */
  50    struct in_addr ip_src, ip_dst;  /* source and dest address */
  51} QEMU_PACKED;
  52
  53static inline bool in6_equal_net(const struct in6_addr *a,
  54                                 const struct in6_addr *b,
  55                                 int prefix_len)
  56{
  57    if (memcmp(a, b, prefix_len / 8) != 0) {
  58        return 0;
  59    }
  60
  61    if (prefix_len % 8 == 0) {
  62        return 1;
  63    }
  64
  65    return a->s6_addr[prefix_len / 8] >> (8 - (prefix_len % 8))
  66        == b->s6_addr[prefix_len / 8] >> (8 - (prefix_len % 8));
  67}
  68
  69#define TCPS_CLOSED             0       /* closed */
  70#define TCPS_LISTEN             1       /* listening for connection */
  71#define TCPS_SYN_SENT           2       /* active, have sent syn */
  72#define TCPS_SYN_RECEIVED       3       /* have send and received syn */
  73/* states < TCPS_ESTABLISHED are those where connections not established */
  74#define TCPS_ESTABLISHED        4       /* established */
  75#define TCPS_CLOSE_WAIT         5       /* rcvd fin, waiting for close */
  76/* states > TCPS_CLOSE_WAIT are those where user has closed */
  77#define TCPS_FIN_WAIT_1         6       /* have closed, sent fin */
  78#define TCPS_CLOSING            7       /* closed xchd FIN; await FIN ACK */
  79#define TCPS_LAST_ACK           8       /* had fin and close; await FIN ACK */
  80/* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
  81#define TCPS_FIN_WAIT_2         9       /* have closed, fin is acked */
  82#define TCPS_TIME_WAIT          10      /* in 2*msl quiet wait after close */
  83
  84int net_parse_macaddr(uint8_t *macaddr, const char *p);
  85
  86#endif /* QEMU_NET_UTIL_H */
  87