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. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Lawrence Berkeley Laboratory and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * @(#) Header: net.c,v 1.9 93/08/06 19:32:15 leres Exp (LBL)
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
45 #include <sys/param.h>
46 #include <sys/socket.h>
51 #include <netinet/in.h>
52 #include <netinet/if_ether.h>
53 #include <netinet/in_systm.h>
55 #include <netinet/ip.h>
56 #include <netinet/ip_var.h>
57 #include <netinet/udp.h>
58 #include <netinet/udp_var.h>
64 * Send a packet and wait for a reply, with exponential backoff.
66 * The send routine must return the actual number of bytes written,
69 * The receive routine can indicate success by returning the number of
70 * bytes read; it can return 0 to indicate EOF; it can return -1 with a
71 * non-zero errno to indicate failure; finally, it can return -1 with a
72 * zero errno to indicate it isn't done yet.
75 sendrecv(d, sproc, sbuf, ssize, rproc, rbuf, rsize)
77 ssize_t (*sproc)(struct iodesc *, void *, size_t);
80 ssize_t (*rproc)(struct iodesc *, void *, size_t, time_t);
90 printf("sendrecv: called\n");
102 cc = (*sproc)(d, sbuf, ssize);
103 if (cc != -1 && cc < ssize)
104 panic("sendrecv: short write! (%d < %d)",
113 /* Error on transmit; wait before retrying */
114 while ((getsecs() - t) < tmo);
122 /* Try to get a packet and process it. */
123 cc = (*rproc)(d, rbuf, rsize, tleft);
124 /* Return on data, EOF or real error. */
125 if (cc != -1 || errno != 0)
128 /* Timed out or didn't get the packet we're waiting for */
136 * Like inet_addr() in the C library, but we only accept base-10.
137 * Return values are in network order.
151 * Collect number up to ``.''.
152 * Values are specified as for C:
153 * 0x=hex, 0=octal, other=decimal.
156 while ((c = *cp) != '\0') {
157 if (c >= '0' && c <= '9') {
158 val = (val * 10) + (c - '0');
168 * a.b.c (with c treated as 16-bits)
169 * a.b (with b treated as 24 bits)
171 if (pp >= parts + 3 || val > 0xff)
178 * Check for trailing characters.
184 * Concoct the address according to
185 * the number of parts specified.
190 case 1: /* a -- 32 bits */
193 case 2: /* a.b -- 8.24 bits */
196 val |= parts[0] << 24;
199 case 3: /* a.b.c -- 8.8.16 bits */
202 val |= (parts[0] << 24) | (parts[1] << 16);
205 case 4: /* a.b.c.d -- 8.8.8.8 bits */
208 val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
214 return (htonl(INADDR_NONE));
221 return (intoa(ia.s_addr));
224 /* Similar to inet_ntoa() */
232 static char buf[17]; /* strlen(".255.255.255.255") + 1 */
235 cp = &buf[sizeof buf];
241 *--cp = byte % 10 + '0';
244 *--cp = byte % 10 + '0';
261 for (*n = 0; isdigit(*s); s++)
262 *n = (*n * 10) + *s - '0';
273 if (p == (char *)0 || *p == '\0')
276 addr |= (n << 24) & 0xff000000;
277 if (*p == '\0' || *p++ != '.')
280 addr |= (n << 16) & 0xff0000;
281 if (*p == '\0' || *p++ != '.')
284 addr |= (n << 8) & 0xff00;
285 if (*p == '\0' || *p++ != '.')