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2 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 #define SOCKET_UTIL_H 1
21 #include <sys/types.h>
22 #include <sys/socket.h>
25 #include <netinet/in.h>
27 #include "openvswitch/types.h"
28 #include <netinet/in_systm.h>
29 #include <netinet/ip.h>
33 int set_nonblocking(int fd
);
34 void xset_nonblocking(int fd
);
35 void setsockopt_tcp_nodelay(int fd
);
36 int set_dscp(int fd
, int family
, uint8_t dscp
);
38 bool addr_is_ipv6(const char *host_name
);
39 int lookup_ip(const char *host_name
, struct in_addr
*address
);
40 int lookup_ipv6(const char *host_name
, struct in6_addr
*address
);
42 int lookup_hostname(const char *host_name
, struct in_addr
*);
44 int get_socket_rcvbuf(int sock
);
45 int check_connection_completion(int fd
);
46 void drain_fd(int fd
, size_t n_packets
);
47 ovs_be32
guess_netmask(ovs_be32 ip
);
49 void inet_parse_host_port_tokens(char *s
, char **hostp
, char **portp
);
50 void inet_parse_port_host_tokens(char *s
, char **portp
, char **hostp
);
51 bool inet_parse_active(const char *target
, int default_port
,
52 struct sockaddr_storage
*ssp
, bool resolve_host
);
53 int inet_open_active(int style
, const char *target
, int default_port
,
54 struct sockaddr_storage
*ssp
, int *fdp
, uint8_t dscp
);
56 bool inet_parse_passive(const char *target
, int default_port
,
57 struct sockaddr_storage
*ssp
);
58 int inet_open_passive(int style
, const char *target
, int default_port
,
59 struct sockaddr_storage
*ssp
, uint8_t dscp
,
60 bool kernel_print_port
);
62 bool inet_parse_address(const char *target
, struct sockaddr_storage
*);
64 int read_fully(int fd
, void *, size_t, size_t *bytes_read
);
65 int write_fully(int fd
, const void *, size_t, size_t *bytes_written
);
67 int fsync_parent_dir(const char *file_name
);
68 int get_mtime(const char *file_name
, struct timespec
*mtime
);
70 char *describe_fd(int fd
);
72 /* Default value of dscp bits for connection between controller and manager.
73 * Value of IPTOS_PREC_INTERNETCONTROL = 0xc0 which is defined
74 * in <netinet/ip.h> is used. */
75 #define DSCP_DEFAULT (IPTOS_PREC_INTERNETCONTROL >> 2)
77 /* Functions for working with sockaddr that might contain an IPv4 or
79 bool sa_is_ip(const struct sockaddr
*);
80 uint16_t sa_get_port(const struct sockaddr
*);
81 struct in6_addr
sa_get_address(const struct sockaddr
*);
82 void sa_format_address(const struct sockaddr
*, struct ds
*);
83 void sa_format_address_nobracks(const struct sockaddr
*, struct ds
*);
84 size_t sa_length(const struct sockaddr
*);
86 /* Functions for working with sockaddr_storage that might contain an IPv4 or
88 bool ss_is_ip(const struct sockaddr_storage
*);
89 uint16_t ss_get_port(const struct sockaddr_storage
*);
90 struct in6_addr
ss_get_address(const struct sockaddr_storage
*);
91 void ss_format_address(const struct sockaddr_storage
*, struct ds
*);
92 void ss_format_address_nobracks(const struct sockaddr_storage
*, struct ds
*);
93 size_t ss_length(const struct sockaddr_storage
*);
95 const char *sock_strerror(int error
);
98 void xpipe(int fds
[2]);
99 void xpipe_nonblocking(int fds
[2]);
101 int drain_rcvbuf(int fd
);
103 int make_unix_socket(int style
, bool nonblock
,
104 const char *bind_path
, const char *connect_path
);
105 int get_unix_name_len(const struct sockaddr_un
*sun
, socklen_t sun_len
);
107 /* Universal sendmmsg and recvmmsg support on Linux.
109 * New enough Linux supports sendmmsg and recvmmsg, but older versions do not.
110 * We add the following infrastructure to allow all code on Linux to use
111 * sendmmsg and recvmmsg, regardless of platform support:
113 * - For platforms that lack these functions entirely, we emulate them.
115 * - With newer glibc but an old kernel, sendmmsg() and recvmmsg() fail with
116 * ENOSYS. To compensate, even if these functions appear to be available, we
117 * wrap them with handlers that use our emulation in this case.
120 #ifndef HAVE_STRUCT_MMSGHDR_MSG_LEN
122 struct msghdr msg_hdr
;
123 unsigned int msg_len
;
127 #ifndef HAVE_SENDMMSG
128 int sendmmsg(int, struct mmsghdr
*, unsigned int, unsigned int);
129 int recvmmsg(int, struct mmsghdr
*, unsigned int, int, struct timespec
*);
131 #define sendmmsg wrap_sendmmsg
132 int wrap_sendmmsg(int, struct mmsghdr
*, unsigned int, unsigned int);
133 #define recvmmsg wrap_recvmmsg
134 int wrap_recvmmsg(int, struct mmsghdr
*, unsigned int, int, struct timespec
*);
136 #endif /* __linux__ */
138 /* Helpers for calling ioctl() on an AF_INET socket. */
140 int af_inet_ioctl(unsigned long int command
, const void *arg
);
141 int af_inet_ifreq_ioctl(const char *name
, struct ifreq
*,
142 unsigned long int cmd
, const char *cmd_name
);
144 #define closesocket close
148 static inline int make_unix_socket(int style
, bool nonblock
,
149 const char *bind_path
,
150 const char *connect_path
)
155 /* Windows defines the 'optval' argument as char * instead of void *. */
156 #define setsockopt(sock, level, optname, optval, optlen) \
157 rpl_setsockopt(sock, level, optname, optval, optlen)
158 static inline int rpl_setsockopt(int sock
, int level
, int optname
,
159 const void *optval
, socklen_t optlen
)
161 return (setsockopt
)(sock
, level
, optname
, (const char *)optval
, optlen
);
164 #define getsockopt(sock, level, optname, optval, optlen) \
165 rpl_getsockopt(sock, level, optname, optval, optlen)
166 static inline int rpl_getsockopt(int sock
, int level
, int optname
,
167 void *optval
, socklen_t
*optlen
)
169 return (getsockopt
)(sock
, level
, optname
, (char *)optval
, optlen
);
173 /* In Windows platform, errno is not set for socket calls.
174 * The last error has to be gotten from WSAGetLastError(). */
175 static inline int sock_errno(void)
178 return WSAGetLastError();
184 #endif /* socket-util.h */