util.h (3567B)
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 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 */