slirp/util.h

   1 /*
   2  * Copyright (c) 2003-2008 Fabrice Bellard
   3  * Copyright (c) 2010-2019 Red Hat, Inc.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to deal
   7  * in the Software without restriction, including without limitation the rights
   8  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9  * copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  21  * THE SOFTWARE.
  22  */
  23 #ifndef UTIL_H_
  24 #define UTIL_H_
  25
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <assert.h>
  29 #include <errno.h>
  30 #include <unistd.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <unistd.h>
  34 #include <inttypes.h>
  35
  36 #ifdef _WIN32
  37 #include <winsock2.h>
  38 #include <windows.h>
  39 #else
  40 #include <sys/socket.h>
  41 #include <netinet/tcp.h>
  42 #include <netinet/in.h>
  43 #endif
  44
  45 #if defined(_WIN32)
  46 # define SLIRP_PACKED __attribute__((gcc_struct, packed))
  47 #else
  48 # define SLIRP_PACKED __attribute__((packed))
  49 #endif
  50
  51 #ifndef DIV_ROUND_UP
  52 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
  53 #endif
  54
  55 #ifndef container_of
  56 #define container_of(ptr, type, member) __extension__ ({    \
  57     void *__mptr = (void *)(ptr);               \
  58     ((type *)(__mptr - offsetof(type, member))); })
  59 #endif
  60
  61 #if defined(_WIN32) /* CONFIG_IOVEC */
  62 # if !defined(IOV_MAX) /* XXX: to avoid duplicate with QEMU osdep.h */
  63 struct iovec {
  64     void *iov_base;
  65     size_t iov_len;
  66 };
  67 # endif
  68 #else
  69 #include <sys/uio.h>
  70 #endif
  71
  72 #define SCALE_MS 1000000
  73
  74 #define ETH_ALEN    6
  75 #define ETH_HLEN    14
  76 #define ETH_P_IP                  (0x0800)      /* Internet Protocol packet  */
  77 #define ETH_P_ARP                 (0x0806)      /* Address Resolution packet */
  78 #define ETH_P_IPV6                (0x86dd)
  79 #define ETH_P_VLAN                (0x8100)
  80 #define ETH_P_DVLAN               (0x88a8)
  81 #define ETH_P_NCSI                (0x88f8)
  82 #define ETH_P_UNKNOWN             (0xffff)
  83
  84 /* FIXME: remove me when made standalone */
  85 #ifdef _WIN32
  86 #undef accept
  87 #undef bind
  88 #undef closesocket
  89 #undef connect
  90 #undef getpeername
  91 #undef getsockname
  92 #undef getsockopt
  93 #undef ioctlsocket
  94 #undef listen
  95 #undef recv
  96 #undef recvfrom
  97 #undef send
  98 #undef sendto
  99 #undef setsockopt
 100 #undef shutdown
 101 #undef socket
 102 #endif
 103
 104 #ifdef _WIN32
 105 #define connect slirp_connect_wrap
 106 int slirp_connect_wrap(int fd, const struct sockaddr *addr, int addrlen);
 107 #define listen slirp_listen_wrap
 108 int slirp_listen_wrap(int fd, int backlog);
 109 #define bind slirp_bind_wrap
 110 int slirp_bind_wrap(int fd, const struct sockaddr *addr, int addrlen);
 111 #define socket slirp_socket_wrap
 112 int slirp_socket_wrap(int domain, int type, int protocol);
 113 #define accept slirp_accept_wrap
 114 int slirp_accept_wrap(int fd, struct sockaddr *addr, int *addrlen);
 115 #define shutdown slirp_shutdown_wrap
 116 int slirp_shutdown_wrap(int fd, int how);
 117 #define getpeername slirp_getpeername_wrap
 118 int slirp_getpeername_wrap(int fd, struct sockaddr *addr, int *addrlen);
 119 #define getsockname slirp_getsockname_wrap
 120 int slirp_getsockname_wrap(int fd, struct sockaddr *addr, int *addrlen);
 121 #define send slirp_send_wrap
 122 ssize_t slirp_send_wrap(int fd, const void *buf, size_t len, int flags);
 123 #define sendto slirp_sendto_wrap
 124 ssize_t slirp_sendto_wrap(int fd, const void *buf, size_t len, int flags,
 125                           const struct sockaddr *dest_addr, int addrlen);
 126 #define recv slirp_recv_wrap
 127 ssize_t slirp_recv_wrap(int fd, void *buf, size_t len, int flags);
 128 #define recvfrom slirp_recvfrom_wrap
 129 ssize_t slirp_recvfrom_wrap(int fd, void *buf, size_t len, int flags,
 130                             struct sockaddr *src_addr, int *addrlen);
 131 #define closesocket slirp_closesocket_wrap
 132 int slirp_closesocket_wrap(int fd);
 133 #define ioctlsocket slirp_ioctlsocket_wrap
 134 int slirp_ioctlsocket_wrap(int fd, int req, void *val);
 135 #define getsockopt slirp_getsockopt_wrap
 136 int slirp_getsockopt_wrap(int sockfd, int level, int optname,
 137                      void *optval, int *optlen);
 138 #define setsockopt slirp_setsockopt_wrap
 139 int slirp_setsockopt_wrap(int sockfd, int level, int optname,
 140                           const void *optval, int optlen);
 141
 142 int inet_aton(const char *cp, struct in_addr *ia);
 143 #else
 144 #define closesocket(s) close(s)
 145 #define ioctlsocket(s, r, v) ioctl(s, r, v)
 146 #endif
 147
 148 int slirp_socket(int domain, int type, int protocol);
 149 void slirp_set_nonblock(int fd);
 150
 151 static inline int slirp_socket_set_nodelay(int fd)
 152 {
 153     int v = 1;
 154     return setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &v, sizeof(v));
 155 }
 156
 157 static inline int slirp_socket_set_fast_reuse(int fd)
 158 {
 159 #ifndef _WIN32
 160     int v = 1;
 161     return setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &v, sizeof(v));
 162 #else
 163     /* Enabling the reuse of an endpoint that was used by a socket still in
 164      * TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows
 165      * fast reuse is the default and SO_REUSEADDR does strange things. So we
 166      * don't have to do anything here. More info can be found at:
 167      * http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */
 168     return 0;
 169 #endif
 170 }
 171
 172 void slirp_pstrcpy(char *buf, int buf_size, const char *str);
 173
 174 #endif