Local changes: - In contrib/libpcap/pcap/bpf.h, do not include pcap/dlt.h. Our system net/dlt.h is pulled in from net/bpf.h. - sys/net/dlt.h: Incorporate changes from libpcap 1.10.3. - lib/libpcap/Makefile: Update for libpcap 1.10.3. Changelog: https://git.tcpdump.org/libpcap/blob/95691ebe7564afa3faa5c6ba0dbd17e351be455a:/CHANGES Reviewed by: emaste Obtained from: https://www.tcpdump.org/release/libpcap-1.10.3.tar.gz Sponsored by: The FreeBSD Foundation
188 lines
5.2 KiB
C
188 lines
5.2 KiB
C
/*
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* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include "varattrs.h"
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/*
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* Tests for pcap_set_nonblock / pcap_get_nonblock:
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* - idempotency
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* - set/get are symmetric
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* - get returns the same before/after activate
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* - pcap_breakloop works after setting nonblock on and then off
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*
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* Really this is meant to
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* be run manually under strace, to check for extra
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* calls to eventfd or close.
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*/
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#include <pcap.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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static pcap_t *pd;
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static char *program_name = "nonblocktest";
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/* Forwards */
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static void PCAP_NORETURN usage(void);
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static void PCAP_NORETURN error(const char *, ...) PCAP_PRINTFLIKE(1, 2);
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static void warning(const char *, ...) PCAP_PRINTFLIKE(1, 2);
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/* VARARGS */
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static void
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error(const char *fmt, ...)
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{
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va_list ap;
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(void)fprintf(stderr, "%s: ", program_name);
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va_start(ap, fmt);
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(void)vfprintf(stderr, fmt, ap);
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va_end(ap);
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if (*fmt) {
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fmt += strlen(fmt);
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if (fmt[-1] != '\n')
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(void)fputc('\n', stderr);
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}
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exit(1);
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/* NOTREACHED */
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}
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/* VARARGS */
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static void
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warning(const char *fmt, ...)
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{
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va_list ap;
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(void)fprintf(stderr, "%s: WARNING: ", program_name);
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va_start(ap, fmt);
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(void)vfprintf(stderr, fmt, ap);
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va_end(ap);
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if (*fmt) {
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fmt += strlen(fmt);
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if (fmt[-1] != '\n')
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(void)fputc('\n', stderr);
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}
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr, "Usage: %s [ -i interface ]\n",
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program_name);
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exit(1);
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}
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static void
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breakme(u_char *user _U_, const struct pcap_pkthdr *h _U_, const u_char *sp _U_)
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{
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warning("using pcap_breakloop()");
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pcap_breakloop(pd);
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}
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int
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main(int argc, char **argv)
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{
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int status, op, i, ret;
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char *device;
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pcap_if_t *devlist;
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char ebuf[PCAP_ERRBUF_SIZE];
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device = NULL;
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while ((op = getopt(argc, argv, "i:sptnq")) != -1) {
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switch (op) {
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case 'i':
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device = optarg;
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break;
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default:
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usage();
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/* NOTREACHED */
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}
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}
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if (device == NULL) {
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if (pcap_findalldevs(&devlist, ebuf) == -1)
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error("%s", ebuf);
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if (devlist == NULL)
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error("no interfaces available for capture");
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device = strdup(devlist->name);
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warning("listening on %s", device);
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pcap_freealldevs(devlist);
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}
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*ebuf = '\0';
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pd = pcap_create(device, ebuf);
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if (pd == NULL)
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error("%s", ebuf);
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else if (*ebuf)
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warning("%s", ebuf);
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/* set nonblock before activate */
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if (pcap_setnonblock(pd, 1, ebuf) < 0)
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error("pcap_setnonblock failed: %s", ebuf);
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/* getnonblock just returns "not activated yet" */
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ret = pcap_getnonblock(pd, ebuf);
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if (ret != PCAP_ERROR_NOT_ACTIVATED)
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error("pcap_getnonblock unexpectedly succeeded");
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if ((status = pcap_activate(pd)) < 0)
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error("pcap_activate failed");
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ret = pcap_getnonblock(pd, ebuf);
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if (ret != 1)
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error( "pcap_getnonblock did not return nonblocking" );
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/* Set nonblock multiple times, ensure with strace that it's a noop */
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for (i=0; i<10; i++) {
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if (pcap_setnonblock(pd, 1, ebuf) < 0)
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error("pcap_setnonblock failed: %s", ebuf);
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ret = pcap_getnonblock(pd, ebuf);
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if (ret != 1)
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error( "pcap_getnonblock did not return nonblocking" );
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}
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/* Set block multiple times, ensure with strace that it's a noop */
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for (i=0; i<10; i++) {
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if (pcap_setnonblock(pd, 0, ebuf) < 0)
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error("pcap_setnonblock failed: %s", ebuf);
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ret = pcap_getnonblock(pd, ebuf);
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if (ret != 0)
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error( "pcap_getnonblock did not return blocking" );
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}
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/* Now pcap_loop forever, with a callback that
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* uses pcap_breakloop to get out of forever */
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pcap_loop(pd, -1, breakme, NULL);
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/* Now test that pcap_setnonblock fails if we can't open the
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* eventfd. */
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if (pcap_setnonblock(pd, 1, ebuf) < 0)
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error("pcap_setnonblock failed: %s", ebuf);
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while (1) {
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ret = open("/dev/null", O_RDONLY);
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if (ret < 0)
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break;
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}
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ret = pcap_setnonblock(pd, 0, ebuf);
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if (ret == 0)
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error("pcap_setnonblock succeeded even though file table is full");
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else
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warning("pcap_setnonblock failed as expected: %s", ebuf);
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}
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