mirror of
https://github.com/nmap/nmap.git
synced 2025-12-27 09:59:04 +00:00
Restore a few necessary parts of libpcap. Final commit for libpcap 1.9.0 upgrade
This commit is contained in:
dmiller
443
libpcap/testprogs/selpolltest.c
Normal file
443
libpcap/testprogs/selpolltest.c
Normal file
@@ -0,0 +1,443 @@
|
||||
/*
|
||||
* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
|
||||
* The Regents of the University of California. All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that: (1) source code distributions
|
||||
* retain the above copyright notice and this paragraph in its entirety, (2)
|
||||
* distributions including binary code include the above copyright notice and
|
||||
* this paragraph in its entirety in the documentation or other materials
|
||||
* provided with the distribution, and (3) all advertising materials mentioning
|
||||
* features or use of this software display the following acknowledgement:
|
||||
* ``This product includes software developed by the University of California,
|
||||
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
|
||||
* the University nor the names of its contributors may be used to endorse
|
||||
* or promote products derived from this software without specific prior
|
||||
* written permission.
|
||||
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
||||
*/
|
||||
|
||||
#include "varattrs.h"
|
||||
|
||||
#ifndef lint
|
||||
static const char copyright[] _U_ =
|
||||
"@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\
|
||||
The Regents of the University of California. All rights reserved.\n";
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Tests how select() and poll() behave on the selectable file descriptor
|
||||
* for a pcap_t.
|
||||
*
|
||||
* This would be significantly different on Windows, as it'd test
|
||||
* how WaitForMultipleObjects() would work on the event handle for a
|
||||
* pcap_t.
|
||||
*/
|
||||
#include <pcap.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <stdarg.h>
|
||||
#include <unistd.h>
|
||||
#include <errno.h>
|
||||
#include <sys/types.h>
|
||||
#ifdef HAVE_SYS_SELECT_H
|
||||
#include <sys/select.h>
|
||||
#else
|
||||
#include <sys/time.h> /* older UN*Xes */
|
||||
#endif
|
||||
#include <poll.h>
|
||||
|
||||
#include "pcap/funcattrs.h"
|
||||
|
||||
static char *program_name;
|
||||
|
||||
/* Forwards */
|
||||
static void countme(u_char *, const struct pcap_pkthdr *, const u_char *);
|
||||
static void PCAP_NORETURN usage(void);
|
||||
static void PCAP_NORETURN error(const char *, ...) PCAP_PRINTFLIKE(1, 2);
|
||||
static void warning(const char *, ...) PCAP_PRINTFLIKE(1, 2);
|
||||
static char *copy_argv(char **);
|
||||
|
||||
static pcap_t *pd;
|
||||
|
||||
int
|
||||
main(int argc, char **argv)
|
||||
{
|
||||
register int op;
|
||||
bpf_u_int32 localnet, netmask;
|
||||
register char *cp, *cmdbuf, *device;
|
||||
int doselect, dopoll, dotimeout, dononblock;
|
||||
const char *mechanism;
|
||||
struct bpf_program fcode;
|
||||
char ebuf[PCAP_ERRBUF_SIZE];
|
||||
pcap_if_t *devlist;
|
||||
int selectable_fd;
|
||||
struct timeval *required_timeout;
|
||||
int status;
|
||||
int packet_count;
|
||||
|
||||
device = NULL;
|
||||
doselect = 0;
|
||||
dopoll = 0;
|
||||
mechanism = NULL;
|
||||
dotimeout = 0;
|
||||
dononblock = 0;
|
||||
if ((cp = strrchr(argv[0], '/')) != NULL)
|
||||
program_name = cp + 1;
|
||||
else
|
||||
program_name = argv[0];
|
||||
|
||||
opterr = 0;
|
||||
while ((op = getopt(argc, argv, "i:sptn")) != -1) {
|
||||
switch (op) {
|
||||
|
||||
case 'i':
|
||||
device = optarg;
|
||||
break;
|
||||
|
||||
case 's':
|
||||
doselect = 1;
|
||||
mechanism = "select() and pcap_dispatch()";
|
||||
break;
|
||||
|
||||
case 'p':
|
||||
dopoll = 1;
|
||||
mechanism = "poll() and pcap_dispatch()";
|
||||
break;
|
||||
|
||||
case 't':
|
||||
dotimeout = 1;
|
||||
break;
|
||||
|
||||
case 'n':
|
||||
dononblock = 1;
|
||||
break;
|
||||
|
||||
default:
|
||||
usage();
|
||||
/* NOTREACHED */
|
||||
}
|
||||
}
|
||||
|
||||
if (doselect && dopoll) {
|
||||
fprintf(stderr, "selpolltest: choose select (-s) or poll (-p), but not both\n");
|
||||
return 1;
|
||||
}
|
||||
if (dotimeout && !doselect && !dopoll) {
|
||||
fprintf(stderr, "selpolltest: timeout (-t) requires select (-s) or poll (-p)\n");
|
||||
return 1;
|
||||
}
|
||||
if (device == NULL) {
|
||||
if (pcap_findalldevs(&devlist, ebuf) == -1)
|
||||
error("%s", ebuf);
|
||||
if (devlist == NULL)
|
||||
error("no interfaces available for capture");
|
||||
device = strdup(devlist->name);
|
||||
pcap_freealldevs(devlist);
|
||||
}
|
||||
*ebuf = '\0';
|
||||
pd = pcap_open_live(device, 65535, 0, 1000, ebuf);
|
||||
if (pd == NULL)
|
||||
error("%s", ebuf);
|
||||
else if (*ebuf)
|
||||
warning("%s", ebuf);
|
||||
if (pcap_lookupnet(device, &localnet, &netmask, ebuf) < 0) {
|
||||
localnet = 0;
|
||||
netmask = 0;
|
||||
warning("%s", ebuf);
|
||||
}
|
||||
cmdbuf = copy_argv(&argv[optind]);
|
||||
|
||||
if (pcap_compile(pd, &fcode, cmdbuf, 1, netmask) < 0)
|
||||
error("%s", pcap_geterr(pd));
|
||||
if (pcap_setfilter(pd, &fcode) < 0)
|
||||
error("%s", pcap_geterr(pd));
|
||||
|
||||
if (doselect || dopoll) {
|
||||
/*
|
||||
* We need either an FD on which to do select()/poll()
|
||||
* or, if there isn't one, a timeout to use in select()/
|
||||
* poll().
|
||||
*/
|
||||
selectable_fd = pcap_get_selectable_fd(pd);
|
||||
if (selectable_fd == -1) {
|
||||
printf("Listening on %s, using %s, with a timeout\n",
|
||||
device, mechanism);
|
||||
required_timeout = pcap_get_required_select_timeout(pd);
|
||||
if (required_timeout == NULL)
|
||||
error("select()/poll() isn't supported on %s, even with a timeout",
|
||||
device);
|
||||
|
||||
/*
|
||||
* As we won't be notified by select() or poll()
|
||||
* that a read can be done, we'll have to periodically
|
||||
* try reading from the device every time the required
|
||||
* timeout expires, and we don't want those attempts
|
||||
* to block if nothing has arrived in that interval,
|
||||
* so we want to force non-blocking mode.
|
||||
*/
|
||||
dononblock = 1;
|
||||
} else {
|
||||
printf("Listening on %s, using %s\n", device,
|
||||
mechanism);
|
||||
required_timeout = NULL;
|
||||
}
|
||||
} else
|
||||
printf("Listening on %s, using pcap_dispatch()\n", device);
|
||||
|
||||
if (dononblock) {
|
||||
if (pcap_setnonblock(pd, 1, ebuf) == -1)
|
||||
error("pcap_setnonblock failed: %s", ebuf);
|
||||
}
|
||||
if (doselect) {
|
||||
for (;;) {
|
||||
fd_set setread, setexcept;
|
||||
struct timeval seltimeout;
|
||||
|
||||
FD_ZERO(&setread);
|
||||
if (selectable_fd != -1) {
|
||||
FD_SET(selectable_fd, &setread);
|
||||
FD_ZERO(&setexcept);
|
||||
FD_SET(selectable_fd, &setexcept);
|
||||
}
|
||||
if (dotimeout) {
|
||||
seltimeout.tv_sec = 0;
|
||||
if (required_timeout != NULL &&
|
||||
required_timeout->tv_usec < 1000)
|
||||
seltimeout.tv_usec = required_timeout->tv_usec;
|
||||
else
|
||||
seltimeout.tv_usec = 1000;
|
||||
status = select(selectable_fd + 1, &setread,
|
||||
NULL, &setexcept, &seltimeout);
|
||||
} else if (required_timeout != NULL) {
|
||||
seltimeout = *required_timeout;
|
||||
status = select(selectable_fd + 1, &setread,
|
||||
NULL, &setexcept, &seltimeout);
|
||||
} else {
|
||||
status = select((selectable_fd == -1) ?
|
||||
0 : selectable_fd + 1, &setread,
|
||||
NULL, &setexcept, NULL);
|
||||
}
|
||||
if (status == -1) {
|
||||
printf("Select returns error (%s)\n",
|
||||
strerror(errno));
|
||||
} else {
|
||||
if (selectable_fd == -1) {
|
||||
if (status != 0)
|
||||
printf("Select returned a descriptor\n");
|
||||
} else {
|
||||
if (status == 0)
|
||||
printf("Select timed out: ");
|
||||
else
|
||||
printf("Select returned a descriptor: ");
|
||||
if (FD_ISSET(selectable_fd, &setread))
|
||||
printf("readable, ");
|
||||
else
|
||||
printf("not readable, ");
|
||||
if (FD_ISSET(selectable_fd, &setexcept))
|
||||
printf("exceptional condition\n");
|
||||
else
|
||||
printf("no exceptional condition\n");
|
||||
}
|
||||
packet_count = 0;
|
||||
status = pcap_dispatch(pd, -1, countme,
|
||||
(u_char *)&packet_count);
|
||||
if (status < 0)
|
||||
break;
|
||||
/*
|
||||
* Don't report this if we're using a
|
||||
* required timeout and we got no packets,
|
||||
* because that could be a very short timeout,
|
||||
* and we don't want to spam the user with
|
||||
* a ton of "no packets" reports.
|
||||
*/
|
||||
if (status != 0 || packet_count != 0 ||
|
||||
required_timeout != NULL) {
|
||||
printf("%d packets seen, %d packets counted after select returns\n",
|
||||
status, packet_count);
|
||||
}
|
||||
}
|
||||
}
|
||||
} else if (dopoll) {
|
||||
for (;;) {
|
||||
struct pollfd fd;
|
||||
int polltimeout;
|
||||
|
||||
fd.fd = selectable_fd;
|
||||
fd.events = POLLIN;
|
||||
if (dotimeout)
|
||||
polltimeout = 1;
|
||||
else if (required_timeout != NULL &&
|
||||
required_timeout->tv_usec >= 1000)
|
||||
polltimeout = required_timeout->tv_usec/1000;
|
||||
else
|
||||
polltimeout = -1;
|
||||
status = poll(&fd, (selectable_fd == -1) ? 0 : 1, polltimeout);
|
||||
if (status == -1) {
|
||||
printf("Poll returns error (%s)\n",
|
||||
strerror(errno));
|
||||
} else {
|
||||
if (selectable_fd == -1) {
|
||||
if (status != 0)
|
||||
printf("Poll returned a descriptor\n");
|
||||
} else {
|
||||
if (status == 0)
|
||||
printf("Poll timed out\n");
|
||||
else {
|
||||
printf("Poll returned a descriptor: ");
|
||||
if (fd.revents & POLLIN)
|
||||
printf("readable, ");
|
||||
else
|
||||
printf("not readable, ");
|
||||
if (fd.revents & POLLERR)
|
||||
printf("exceptional condition, ");
|
||||
else
|
||||
printf("no exceptional condition, ");
|
||||
if (fd.revents & POLLHUP)
|
||||
printf("disconnect, ");
|
||||
else
|
||||
printf("no disconnect, ");
|
||||
if (fd.revents & POLLNVAL)
|
||||
printf("invalid\n");
|
||||
else
|
||||
printf("not invalid\n");
|
||||
}
|
||||
}
|
||||
packet_count = 0;
|
||||
status = pcap_dispatch(pd, -1, countme,
|
||||
(u_char *)&packet_count);
|
||||
if (status < 0)
|
||||
break;
|
||||
/*
|
||||
* Don't report this if we're using a
|
||||
* required timeout and we got no packets,
|
||||
* because that could be a very short timeout,
|
||||
* and we don't want to spam the user with
|
||||
* a ton of "no packets" reports.
|
||||
*/
|
||||
if (status != 0 || packet_count != 0 ||
|
||||
required_timeout != NULL) {
|
||||
printf("%d packets seen, %d packets counted after poll returns\n",
|
||||
status, packet_count);
|
||||
}
|
||||
}
|
||||
}
|
||||
} else {
|
||||
for (;;) {
|
||||
packet_count = 0;
|
||||
status = pcap_dispatch(pd, -1, countme,
|
||||
(u_char *)&packet_count);
|
||||
if (status < 0)
|
||||
break;
|
||||
printf("%d packets seen, %d packets counted after pcap_dispatch returns\n",
|
||||
status, packet_count);
|
||||
}
|
||||
}
|
||||
if (status == -2) {
|
||||
/*
|
||||
* We got interrupted, so perhaps we didn't
|
||||
* manage to finish a line we were printing.
|
||||
* Print an extra newline, just in case.
|
||||
*/
|
||||
putchar('\n');
|
||||
}
|
||||
(void)fflush(stdout);
|
||||
if (status == -1) {
|
||||
/*
|
||||
* Error. Report it.
|
||||
*/
|
||||
(void)fprintf(stderr, "%s: pcap_loop: %s\n",
|
||||
program_name, pcap_geterr(pd));
|
||||
}
|
||||
pcap_close(pd);
|
||||
exit(status == -1 ? 1 : 0);
|
||||
}
|
||||
|
||||
static void
|
||||
countme(u_char *user, const struct pcap_pkthdr *h _U_, const u_char *sp _U_)
|
||||
{
|
||||
int *counterp = (int *)user;
|
||||
|
||||
(*counterp)++;
|
||||
}
|
||||
|
||||
static void
|
||||
usage(void)
|
||||
{
|
||||
(void)fprintf(stderr, "Usage: %s [ -sptn ] [ -i interface ] [expression]\n",
|
||||
program_name);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
/* VARARGS */
|
||||
static void
|
||||
error(const char *fmt, ...)
|
||||
{
|
||||
va_list ap;
|
||||
|
||||
(void)fprintf(stderr, "%s: ", program_name);
|
||||
va_start(ap, fmt);
|
||||
(void)vfprintf(stderr, fmt, ap);
|
||||
va_end(ap);
|
||||
if (*fmt) {
|
||||
fmt += strlen(fmt);
|
||||
if (fmt[-1] != '\n')
|
||||
(void)fputc('\n', stderr);
|
||||
}
|
||||
exit(1);
|
||||
/* NOTREACHED */
|
||||
}
|
||||
|
||||
/* VARARGS */
|
||||
static void
|
||||
warning(const char *fmt, ...)
|
||||
{
|
||||
va_list ap;
|
||||
|
||||
(void)fprintf(stderr, "%s: WARNING: ", program_name);
|
||||
va_start(ap, fmt);
|
||||
(void)vfprintf(stderr, fmt, ap);
|
||||
va_end(ap);
|
||||
if (*fmt) {
|
||||
fmt += strlen(fmt);
|
||||
if (fmt[-1] != '\n')
|
||||
(void)fputc('\n', stderr);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Copy arg vector into a new buffer, concatenating arguments with spaces.
|
||||
*/
|
||||
static char *
|
||||
copy_argv(register char **argv)
|
||||
{
|
||||
register char **p;
|
||||
register u_int len = 0;
|
||||
char *buf;
|
||||
char *src, *dst;
|
||||
|
||||
p = argv;
|
||||
if (*p == 0)
|
||||
return 0;
|
||||
|
||||
while (*p)
|
||||
len += strlen(*p++) + 1;
|
||||
|
||||
buf = (char *)malloc(len);
|
||||
if (buf == NULL)
|
||||
error("copy_argv: malloc");
|
||||
|
||||
p = argv;
|
||||
dst = buf;
|
||||
while ((src = *p++) != NULL) {
|
||||
while ((*dst++ = *src++) != '\0')
|
||||
;
|
||||
dst[-1] = ' ';
|
||||
}
|
||||
dst[-1] = '\0';
|
||||
|
||||
return buf;
|
||||
}
|
||||
Reference in New Issue
Block a user