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 | #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 | |
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 | |