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 */
32 struct ip {
33 #if HOST_BIG_ENDIAN
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
in6_equal_net(const struct in6_addr * a,const struct in6_addr * b,int prefix_len)53 static 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
84 int net_parse_macaddr(uint8_t *macaddr, const char *p);
85
86 #endif /* QEMU_NET_UTIL_H */
87