slirp/src/util.h

   1 /* SPDX-License-Identifier: MIT */
   2 /*
   3  * Copyright (c) 2003-2008 Fabrice Bellard
   4  * Copyright (c) 2010-2019 Red Hat, Inc.
   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 #ifndef UTIL_H_
  25 #define UTIL_H_
  26
  27 #include <stdlib.h>
  28 #include <stdio.h>
  29 #include <assert.h>
  30 #include <errno.h>
  31 #include <unistd.h>
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34 #include <unistd.h>
  35 #include <inttypes.h>
  36
  37 #ifdef _WIN32
  38 #include <winsock2.h>
  39 #include <windows.h>
  40 #else
  41 #include <sys/socket.h>
  42 #include <netinet/tcp.h>
  43 #include <netinet/in.h>
  44 #endif
  45
  46 #if defined(_WIN32)
  47 # define SLIRP_PACKED __attribute__((gcc_struct, packed))
  48 #else
  49 # define SLIRP_PACKED __attribute__((packed))
  50 #endif
  51
  52 #ifndef DIV_ROUND_UP
  53 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
  54 #endif
  55
  56 #ifndef container_of
  57 #define container_of(ptr, type, member) __extension__ ({    \
  58     void *__mptr = (void *)(ptr);               \
  59     ((type *)(__mptr - offsetof(type, member))); })
  60 #endif
  61
  62 #if defined(_WIN32) /* CONFIG_IOVEC */
  63 # if !defined(IOV_MAX) /* XXX: to avoid duplicate with QEMU osdep.h */
  64 struct iovec {
  65     void *iov_base;
  66     size_t iov_len;
  67 };
  68 # endif
  69 #else
  70 #include <sys/uio.h>
  71 #endif
  72
  73 #define SCALE_MS 1000000
  74
  75 #define ETH_ALEN    6
  76 #define ETH_HLEN    14
  77 #define ETH_P_IP                  (0x0800)      /* Internet Protocol packet  */
  78 #define ETH_P_ARP                 (0x0806)      /* Address Resolution packet */
  79 #define ETH_P_IPV6                (0x86dd)
  80 #define ETH_P_VLAN                (0x8100)
  81 #define ETH_P_DVLAN               (0x88a8)
  82 #define ETH_P_NCSI                (0x88f8)
  83 #define ETH_P_UNKNOWN             (0xffff)
  84
  85 /* FIXME: remove me when made standalone */
  86 #ifdef _WIN32
  87 #undef accept
  88 #undef bind
  89 #undef closesocket
  90 #undef connect
  91 #undef getpeername
  92 #undef getsockname
  93 #undef getsockopt
  94 #undef ioctlsocket
  95 #undef listen
  96 #undef recv
  97 #undef recvfrom
  98 #undef send
  99 #undef sendto
 100 #undef setsockopt
 101 #undef shutdown
 102 #undef socket
 103 #endif
 104
 105 #ifdef _WIN32
 106 #define connect slirp_connect_wrap
 107 int slirp_connect_wrap(int fd, const struct sockaddr *addr, int addrlen);
 108 #define listen slirp_listen_wrap
 109 int slirp_listen_wrap(int fd, int backlog);
 110 #define bind slirp_bind_wrap
 111 int slirp_bind_wrap(int fd, const struct sockaddr *addr, int addrlen);
 112 #define socket slirp_socket_wrap
 113 int slirp_socket_wrap(int domain, int type, int protocol);
 114 #define accept slirp_accept_wrap
 115 int slirp_accept_wrap(int fd, struct sockaddr *addr, int *addrlen);
 116 #define shutdown slirp_shutdown_wrap
 117 int slirp_shutdown_wrap(int fd, int how);
 118 #define getpeername slirp_getpeername_wrap
 119 int slirp_getpeername_wrap(int fd, struct sockaddr *addr, int *addrlen);
 120 #define getsockname slirp_getsockname_wrap
 121 int slirp_getsockname_wrap(int fd, struct sockaddr *addr, int *addrlen);
 122 #define send slirp_send_wrap
 123 ssize_t slirp_send_wrap(int fd, const void *buf, size_t len, int flags);
 124 #define sendto slirp_sendto_wrap
 125 ssize_t slirp_sendto_wrap(int fd, const void *buf, size_t len, int flags,
 126                           const struct sockaddr *dest_addr, int addrlen);
 127 #define recv slirp_recv_wrap
 128 ssize_t slirp_recv_wrap(int fd, void *buf, size_t len, int flags);
 129 #define recvfrom slirp_recvfrom_wrap
 130 ssize_t slirp_recvfrom_wrap(int fd, void *buf, size_t len, int flags,
 131                             struct sockaddr *src_addr, int *addrlen);
 132 #define closesocket slirp_closesocket_wrap
 133 int slirp_closesocket_wrap(int fd);
 134 #define ioctlsocket slirp_ioctlsocket_wrap
 135 int slirp_ioctlsocket_wrap(int fd, int req, void *val);
 136 #define getsockopt slirp_getsockopt_wrap
 137 int slirp_getsockopt_wrap(int sockfd, int level, int optname,
 138                      void *optval, int *optlen);
 139 #define setsockopt slirp_setsockopt_wrap
 140 int slirp_setsockopt_wrap(int sockfd, int level, int optname,
 141                           const void *optval, int optlen);
 142 #define inet_aton slirp_inet_aton
 143 int slirp_inet_aton(const char *cp, struct in_addr *ia);
 144 #else
 145 #define closesocket(s) close(s)
 146 #define ioctlsocket(s, r, v) ioctl(s, r, v)
 147 #endif
 148
 149 int slirp_socket(int domain, int type, int protocol);
 150 void slirp_set_nonblock(int fd);
 151
 152 static inline int slirp_socket_set_nodelay(int fd)
 153 {
 154     int v = 1;
 155     return setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &v, sizeof(v));
 156 }
 157
 158 static inline int slirp_socket_set_fast_reuse(int fd)
 159 {
 160 #ifndef _WIN32
 161     int v = 1;
 162     return setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &v, sizeof(v));
 163 #else
 164     /* Enabling the reuse of an endpoint that was used by a socket still in
 165      * TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows
 166      * fast reuse is the default and SO_REUSEADDR does strange things. So we
 167      * don't have to do anything here. More info can be found at:
 168      * http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */
 169     return 0;
 170 #endif
 171 }
 172
 173 void slirp_pstrcpy(char *buf, int buf_size, const char *str);
 174
 175 #endif