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) && (defined(__x86_64__) || defined(__i386__))
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) \
58 __extension__({ \
59 void *__mptr = (void *)(ptr); \
60 ((type *)(__mptr - offsetof(type, member))); \
61 })
62#endif
63
64#if defined(_WIN32) /* CONFIG_IOVEC */
65#if !defined(IOV_MAX) /* XXX: to avoid duplicate with QEMU osdep.h */
66struct iovec {
67 void *iov_base;
68 size_t iov_len;
69};
70#endif
71#else
72#include <sys/uio.h>
73#endif
74
75#define stringify(s) tostring(s)
76#define tostring(s) #s
77
78#define SCALE_MS 1000000
79
80#define ETH_ALEN 6
81#define ETH_HLEN 14
82#define ETH_P_IP (0x0800) /* Internet Protocol packet */
83#define ETH_P_ARP (0x0806) /* Address Resolution packet */
84#define ETH_P_IPV6 (0x86dd)
85#define ETH_P_VLAN (0x8100)
86#define ETH_P_DVLAN (0x88a8)
87#define ETH_P_NCSI (0x88f8)
88#define ETH_P_UNKNOWN (0xffff)
89
90/* FIXME: remove me when made standalone */
91#ifdef _WIN32
92#undef accept
93#undef bind
94#undef closesocket
95#undef connect
96#undef getpeername
97#undef getsockname
98#undef getsockopt
99#undef ioctlsocket
100#undef listen
101#undef recv
102#undef recvfrom
103#undef send
104#undef sendto
105#undef setsockopt
106#undef shutdown
107#undef socket
108#endif
109
110#ifdef _WIN32
111#define connect slirp_connect_wrap
112int slirp_connect_wrap(int fd, const struct sockaddr *addr, int addrlen);
113#define listen slirp_listen_wrap
114int slirp_listen_wrap(int fd, int backlog);
115#define bind slirp_bind_wrap
116int slirp_bind_wrap(int fd, const struct sockaddr *addr, int addrlen);
117#define socket slirp_socket_wrap
118int slirp_socket_wrap(int domain, int type, int protocol);
119#define accept slirp_accept_wrap
120int slirp_accept_wrap(int fd, struct sockaddr *addr, int *addrlen);
121#define shutdown slirp_shutdown_wrap
122int slirp_shutdown_wrap(int fd, int how);
123#define getpeername slirp_getpeername_wrap
124int slirp_getpeername_wrap(int fd, struct sockaddr *addr, int *addrlen);
125#define getsockname slirp_getsockname_wrap
126int slirp_getsockname_wrap(int fd, struct sockaddr *addr, int *addrlen);
127#define send slirp_send_wrap
128ssize_t slirp_send_wrap(int fd, const void *buf, size_t len, int flags);
129#define sendto slirp_sendto_wrap
130ssize_t slirp_sendto_wrap(int fd, const void *buf, size_t len, int flags,
131 const struct sockaddr *dest_addr, int addrlen);
132#define recv slirp_recv_wrap
133ssize_t slirp_recv_wrap(int fd, void *buf, size_t len, int flags);
134#define recvfrom slirp_recvfrom_wrap
135ssize_t slirp_recvfrom_wrap(int fd, void *buf, size_t len, int flags,
136 struct sockaddr *src_addr, int *addrlen);
137#define closesocket slirp_closesocket_wrap
138int slirp_closesocket_wrap(int fd);
139#define ioctlsocket slirp_ioctlsocket_wrap
140int slirp_ioctlsocket_wrap(int fd, int req, void *val);
141#define getsockopt slirp_getsockopt_wrap
142int slirp_getsockopt_wrap(int sockfd, int level, int optname, void *optval,
143 int *optlen);
144#define setsockopt slirp_setsockopt_wrap
145int slirp_setsockopt_wrap(int sockfd, int level, int optname,
146 const void *optval, int optlen);
147#define inet_aton slirp_inet_aton
148int slirp_inet_aton(const char *cp, struct in_addr *ia);
149#else
150#define closesocket(s) close(s)
151#define ioctlsocket(s, r, v) ioctl(s, r, v)
152#endif
153
154int slirp_socket(int domain, int type, int protocol);
155void slirp_set_nonblock(int fd);
156
157static inline int slirp_socket_set_nodelay(int fd)
158{
159 int v = 1;
160 return setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &v, sizeof(v));
161}
162
163static inline int slirp_socket_set_fast_reuse(int fd)
164{
165#ifndef _WIN32
166 int v = 1;
167 return setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &v, sizeof(v));
168#else
169 /* Enabling the reuse of an endpoint that was used by a socket still in
170 * TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows
171 * fast reuse is the default and SO_REUSEADDR does strange things. So we
172 * don't have to do anything here. More info can be found at:
173 * http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */
174 return 0;
175#endif
176}
177
178void slirp_pstrcpy(char *buf, int buf_size, const char *str);
179
180#endif
181