1 /* $NetBSD: net.c,v 1.20 1997/12/26 22:41:30 scottr Exp $ */
4 * Copyright (c) 1992 Regents of the University of California.
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * @(#) Header: net.c,v 1.9 93/08/06 19:32:15 leres Exp (LBL)
36 * $FreeBSD: src/lib/libstand/net.c,v 1.1.1.1.6.1 2000/04/15 03:09:28 ps Exp $
37 * $DragonFly: src/lib/libstand/net.c,v 1.5 2005/12/11 02:27:26 swildner Exp $
40 #include <sys/param.h>
41 #include <sys/socket.h>
46 #include <netinet/in.h>
47 #include <netinet/if_ether.h>
48 #include <netinet/in_systm.h>
50 #include <netinet/ip.h>
51 #include <netinet/ip_var.h>
52 #include <netinet/udp.h>
53 #include <netinet/udp_var.h>
59 * Send a packet and wait for a reply, with exponential backoff.
61 * The send routine must return the actual number of bytes written,
64 * The receive routine can indicate success by returning the number of
65 * bytes read; it can return 0 to indicate EOF; it can return -1 with a
66 * non-zero errno to indicate failure; finally, it can return -1 with a
67 * zero errno to indicate it isn't done yet.
70 sendrecv(struct iodesc
*d
, ssize_t (*sproc
)(struct iodesc
*, void *, size_t),
71 void *sbuf
, size_t ssize
,
72 ssize_t (*rproc
)(struct iodesc
*, void *, size_t, time_t), void *rbuf
,
81 printf("sendrecv: called\n");
93 cc
= (*sproc
)(d
, sbuf
, ssize
);
94 if (cc
!= -1 && cc
< ssize
)
95 panic("sendrecv: short write! (%d < %d)",
104 /* Error on transmit; wait before retrying */
105 while ((getsecs() - t
) < tmo
);
113 /* Try to get a packet and process it. */
114 cc
= (*rproc
)(d
, rbuf
, rsize
, tleft
);
115 /* Return on data, EOF or real error. */
116 if (cc
!= -1 || errno
!= 0)
119 /* Timed out or didn't get the packet we're waiting for */
127 * Like inet_addr() in the C library, but we only accept base-10.
128 * Return values are in network order.
141 * Collect number up to ``.''.
142 * Values are specified as for C:
143 * 0x=hex, 0=octal, other=decimal.
146 while ((c
= *cp
) != '\0') {
147 if (c
>= '0' && c
<= '9') {
148 val
= (val
* 10) + (c
- '0');
158 * a.b.c (with c treated as 16-bits)
159 * a.b (with b treated as 24 bits)
161 if (pp
>= parts
+ 3 || val
> 0xff)
168 * Check for trailing characters.
174 * Concoct the address according to
175 * the number of parts specified.
180 case 1: /* a -- 32 bits */
183 case 2: /* a.b -- 8.24 bits */
186 val
|= parts
[0] << 24;
189 case 3: /* a.b.c -- 8.8.16 bits */
192 val
|= (parts
[0] << 24) | (parts
[1] << 16);
195 case 4: /* a.b.c.d -- 8.8.8.8 bits */
198 val
|= (parts
[0] << 24) | (parts
[1] << 16) | (parts
[2] << 8);
204 return (htonl(INADDR_NONE
));
208 inet_ntoa(struct in_addr ia
)
210 return (intoa(ia
.s_addr
));
213 /* Similar to inet_ntoa() */
220 static char buf
[17]; /* strlen(".255.255.255.255") + 1 */
223 cp
= &buf
[sizeof buf
];
229 *--cp
= byte
% 10 + '0';
232 *--cp
= byte
% 10 + '0';
245 number(char *s
, int *n
)
247 for (*n
= 0; isdigit(*s
); s
++)
248 *n
= (*n
* 10) + *s
- '0';
253 ip_convertaddr(char *p
)
258 if (p
== NULL
|| *p
== '\0')
261 addr
|= (n
<< 24) & 0xff000000;
262 if (*p
== '\0' || *p
++ != '.')
265 addr
|= (n
<< 16) & 0xff0000;
266 if (*p
== '\0' || *p
++ != '.')
269 addr
|= (n
<< 8) & 0xff00;
270 if (*p
== '\0' || *p
++ != '.')