LXR qemu/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 */
  64struct 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
 107int slirp_connect_wrap(int fd, const struct sockaddr *addr, int addrlen);
 108#define listen slirp_listen_wrap
 109int slirp_listen_wrap(int fd, int backlog);
 110#define bind slirp_bind_wrap
 111int slirp_bind_wrap(int fd, const struct sockaddr *addr, int addrlen);
 112#define socket slirp_socket_wrap
 113int slirp_socket_wrap(int domain, int type, int protocol);
 114#define accept slirp_accept_wrap
 115int slirp_accept_wrap(int fd, struct sockaddr *addr, int *addrlen);
 116#define shutdown slirp_shutdown_wrap
 117int slirp_shutdown_wrap(int fd, int how);
 118#define getpeername slirp_getpeername_wrap
 119int slirp_getpeername_wrap(int fd, struct sockaddr *addr, int *addrlen);
 120#define getsockname slirp_getsockname_wrap
 121int slirp_getsockname_wrap(int fd, struct sockaddr *addr, int *addrlen);
 122#define send slirp_send_wrap
 123ssize_t slirp_send_wrap(int fd, const void *buf, size_t len, int flags);
 124#define sendto slirp_sendto_wrap
 125ssize_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
 128ssize_t slirp_recv_wrap(int fd, void *buf, size_t len, int flags);
 129#define recvfrom slirp_recvfrom_wrap
 130ssize_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
 133int slirp_closesocket_wrap(int fd);
 134#define ioctlsocket slirp_ioctlsocket_wrap
 135int slirp_ioctlsocket_wrap(int fd, int req, void *val);
 136#define getsockopt slirp_getsockopt_wrap
 137int slirp_getsockopt_wrap(int sockfd, int level, int optname,
 138                     void *optval, int *optlen);
 139#define setsockopt slirp_setsockopt_wrap
 140int slirp_setsockopt_wrap(int sockfd, int level, int optname,
 141                          const void *optval, int optlen);
 142#define inet_aton slirp_inet_aton
 143int 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
 149int slirp_socket(int domain, int type, int protocol);
 150void slirp_set_nonblock(int fd);
 151
 152static 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
 158static 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
 173void slirp_pstrcpy(char *buf, int buf_size, const char *str);
 174
 175#endif
 176