2 * Copyright (c) 2007, 2008, 2010 Zmanda, Inc. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published
6 * by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
10 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 * Contact information: Zmanda Inc, 465 S. Mathilda Ave., Suite 300
18 * Sunnyvale, CA 94086, USA, or: http://www.zmanda.com
20 * Author: Dustin J. Mitchell <dustin@zmanda.com>
23 * Utility routines for handling sockaddrs
26 #ifndef SOCKADDR_UTIL_H
27 #define SOCKADDR_UTIL_H
31 /* Dump a sockaddr_union using dbprintf
33 * @param sa: the sockaddr to dump
35 void dump_sockaddr(sockaddr_union * sa);
37 /* Convert a sockaddr_union to a string.
39 * NOTE: this function is not threadsafe!
41 * @param sa: the sockaddr_union to dump
42 * @returns: pointer to statically allocated string
44 char * str_sockaddr(sockaddr_union *sa);
46 /* Compare two sockaddr_union objects, optionally comparing
47 * only the address (and thus ignoring port, flow info, etc.).
49 * @param su1: one sockaddr_union to compare
50 * @param su2: the other sockaddr_union to compare
51 * @param addr_only: if true, ignore port, flow info, etc.
52 * @returns: -1, 0, or 1 for <, ==, >, respectively
54 int cmp_sockaddr(sockaddr_union *su1,
58 /* Parse a string into a sockaddr. This will try all available address
61 * @param src: the string representation of the address
62 * @param dst: the sockaddr_union in which to store the result
63 * @returns: 1 on success, -1 on error, or 0 if unparseable
69 /* Copy a sockaddr object.
71 * @param dest: destination
74 #define copy_sockaddr(dest, src) memcpy((dest), (src), SS_LEN((src)))
76 /* The "best" address family we support.
80 #define AF_NATIVE AF_INET6
82 #define AF_NATIVE AF_INET
85 /* Get the family for a sockaddr_union.
87 * @param su: the sockaddr_union to examine
89 #define SU_GET_FAMILY(su) ((su)->sa.sa_family)
90 /* Calculate the length of the data in a sockaddr_union.
92 * @param su: the sockaddr_union to examine
93 * @returns: length of the data in the object
97 # define SS_LEN(su) (SU_GET_FAMILY(su)==AF_INET6? sizeof(struct sockaddr_in6):sizeof(struct sockaddr_in))
99 # define SS_LEN(su) (sizeof(struct sockaddr_in))
102 /* Initialize a sockaddr_union to all zeroes (as directed by RFC),
103 * and set its address family as specified
105 * @param su: sockaddr_union object to initialize
106 * @param family: an AF_* constant
108 /* SU_INIT(su, family) */
109 #define SU_INIT(su, family) do { \
110 memset((su), 0, sizeof(*(su))); \
111 (su)->sa.sa_family = (family); \
114 /* set a sockaddr_union to the family-appropriate equivalent of
115 * INADDR_ANY -- a wildcard address and port. Call SU_INIT(su)
116 * first to initialize the object and set the family.
118 * @param su: the sockaddr_union to set
120 /* SU_SET_INADDR_ANY(su) */
122 #define SU_SET_INADDR_ANY(su) do { \
123 switch (SU_GET_FAMILY(su)) { \
125 (su)->sin6.sin6_flowinfo = 0; \
126 (su)->sin6.sin6_addr = in6addr_any; \
129 (su)->sin.sin_addr.s_addr = INADDR_ANY; \
134 #define SU_SET_INADDR_ANY(su) do { \
135 (su)->sin.sin_addr.s_addr = INADDR_ANY; \
139 /* Set the port in a sockaddr_union that already has an family
141 * @param su: the sockaddr_union to manipulate
142 * @param port: the port to insert (in host byte order)
144 /* SU_SET_PORT(su, port) */
146 #define SU_SET_PORT(su, port) \
147 switch (SU_GET_FAMILY(su)) { \
149 (su)->sin.sin_port = (in_port_t)htons((port)); \
152 (su)->sin6.sin6_port = (in_port_t)htons((port)); \
154 default: assert(0); \
157 #define SU_SET_PORT(su, port) \
158 (su)->sin.sin_port = (in_port_t)htons((port));
161 /* Get the port in a sockaddr_union object
163 * @param su: the sockaddr_union to manipulate
164 * @return: the port, in host byte horder
166 /* SU_GET_PORT(su) */
168 #define SU_GET_PORT(su) (ntohs(SU_GET_FAMILY(su) == AF_INET6? (su)->sin6.sin6_port:(su)->sin.sin_port))
170 #define SU_GET_PORT(su) (ntohs((su)->sin.sin_port))
173 #endif /* SOCKADDR_UTIL_H */