1 files changed, 341 insertions, 0 deletions
diff --git a/testprogs/filtertest.c b/testprogs/filtertest.c
new file mode 100644
index 00000000..380cb73e
--- /dev/null
+++ b/testprogs/filtertest.c
@@ -0,0 +1,341 @@
+/*
+ * 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
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <pcap.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#ifdef _WIN32
+  #include "getopt.h"
+  #include "unix.h"
+#else
+  #include <unistd.h>
+#endif
+#include <fcntl.h>
+#include <errno.h>
+#ifdef _WIN32
+  #include <winsock2.h>
+  #include <ws2tcpip.h>
+#else
+  #include <sys/socket.h>
+  #include <arpa/inet.h>
+#endif
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "pcap/funcattrs.h"
+
+static char *program_name;
+
+/* Forwards */
+static void PCAP_NORETURN usage(void);
+static void PCAP_NORETURN error(const char *, ...) PCAP_PRINTFLIKE(1, 2);
+static void warn(const char *, ...) PCAP_PRINTFLIKE(1, 2);
+
+#ifdef BDEBUG
+int dflag;
+#endif
+
+/*
+ * On Windows, we need to open the file in binary mode, so that
+ * we get all the bytes specified by the size we get from "fstat()".
+ * On UNIX, that's not necessary.  O_BINARY is defined on Windows;
+ * we define it as 0 if it's not defined, so it does nothing.
+ */
+#ifndef O_BINARY
+#define O_BINARY	0
+#endif
+
+static char *
+read_infile(char *fname)
+{
+	register int i, fd, cc;
+	register char *cp;
+	struct stat buf;
+
+	fd = open(fname, O_RDONLY|O_BINARY);
+	if (fd < 0)
+		error("can't open %s: %s", fname, pcap_strerror(errno));
+
+	if (fstat(fd, &buf) < 0)
+		error("can't stat %s: %s", fname, pcap_strerror(errno));
+
+	cp = malloc((u_int)buf.st_size + 1);
+	if (cp == NULL)
+		error("malloc(%d) for %s: %s", (u_int)buf.st_size + 1,
+			fname, pcap_strerror(errno));
+	cc = read(fd, cp, (u_int)buf.st_size);
+	if (cc < 0)
+		error("read %s: %s", fname, pcap_strerror(errno));
+	if (cc != buf.st_size)
+		error("short read %s (%d != %d)", fname, cc, (int)buf.st_size);
+
+	close(fd);
+	/* replace "# comment" with spaces */
+	for (i = 0; i < cc; i++) {
+		if (cp[i] == '#')
+			while (i < cc && cp[i] != '\n')
+				cp[i++] = ' ';
+	}
+	cp[cc] = '\0';
+	return (cp);
+}
+
+/* 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
+warn(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;
+}
+
+int
+main(int argc, char **argv)
+{
+	char *cp;
+	int op;
+#ifndef BDEBUG
+	int dflag;
+#endif
+	char *infile;
+	int Oflag;
+	long snaplen;
+	char *p;
+	int dlt;
+	int have_fcode = 0;
+	bpf_u_int32 netmask = PCAP_NETMASK_UNKNOWN;
+	char *cmdbuf;
+	pcap_t *pd;
+	struct bpf_program fcode;
+
+#ifdef _WIN32
+	if (pcap_wsockinit() != 0)
+		return 1;
+#endif /* _WIN32 */
+
+#ifndef BDEBUG
+	dflag = 1;
+#else
+	/* if optimizer debugging is enabled, output DOT graph
+	 * `dflag=4' is equivalent to -dddd to follow -d/-dd/-ddd
+	 * convention in tcpdump command line
+	 */
+	dflag = 4;
+#endif
+	infile = NULL;
+	Oflag = 1;
+	snaplen = 68;
+
+	if ((cp = strrchr(argv[0], '/')) != NULL)
+		program_name = cp + 1;
+	else
+		program_name = argv[0];
+
+	opterr = 0;
+	while ((op = getopt(argc, argv, "dF:m:Os:")) != -1) {
+		switch (op) {
+
+		case 'd':
+			++dflag;
+			break;
+
+		case 'F':
+			infile = optarg;
+			break;
+
+		case 'O':
+			Oflag = 0;
+			break;
+
+		case 'm': {
+			bpf_u_int32 addr;
+
+			switch (inet_pton(AF_INET, optarg, &addr)) {
+
+			case 0:                        
+				error("invalid netmask %s", optarg);
+				break;
+
+			case -1:
+				error("invalid netmask %s: %s", optarg,
+				    pcap_strerror(errno));
+				break;
+
+			case 1:
+				netmask = addr;
+				break;
+			}
+			break;
+		}
+
+		case 's': {
+			char *end;
+
+			snaplen = strtol(optarg, &end, 0);
+			if (optarg == end || *end != '\0'
+			    || snaplen < 0 || snaplen > 65535)
+				error("invalid snaplen %s", optarg);
+			else if (snaplen == 0)
+				snaplen = 65535;
+			break;
+		}
+
+		default:
+			usage();
+			/* NOTREACHED */
+		}
+	}
+
+	if (optind >= argc) {
+		usage();
+		/* NOTREACHED */
+	}
+
+	dlt = pcap_datalink_name_to_val(argv[optind]);
+	if (dlt < 0) {
+		dlt = (int)strtol(argv[optind], &p, 10);
+		if (p == argv[optind] || *p != '\0')
+			error("invalid data link type %s", argv[optind]);
+	}
+
+	if (infile)
+		cmdbuf = read_infile(infile);
+	else
+		cmdbuf = copy_argv(&argv[optind+1]);
+
+	pd = pcap_open_dead(dlt, snaplen);
+	if (pd == NULL)
+		error("Can't open fake pcap_t");
+
+	if (pcap_compile(pd, &fcode, cmdbuf, Oflag, netmask) < 0)
+		error("%s", pcap_geterr(pd));
+
+	have_fcode = 1;
+	if (!bpf_validate(fcode.bf_insns, fcode.bf_len))
+		warn("Filter doesn't pass validation");
+
+#ifdef BDEBUG
+	if (cmdbuf != NULL) {
+		// replace line feed with space
+		for (cp = cmdbuf; *cp != '\0'; ++cp) {
+			if (*cp == '\r' || *cp == '\n') {
+				*cp = ' ';
+			}
+		}
+		// only show machine code if BDEBUG defined, since dflag > 3
+		printf("machine codes for filter: %s\n", cmdbuf);
+	} else
+		printf("machine codes for empty filter:\n");
+#endif
+
+	bpf_dump(&fcode, dflag);
+	free(cmdbuf);
+	if (have_fcode)
+		pcap_freecode (&fcode);
+	pcap_close(pd);
+	exit(0);
+}
+
+static void
+usage(void)
+{
+	(void)fprintf(stderr, "%s, with %s\n", program_name,
+	    pcap_lib_version());
+	(void)fprintf(stderr,
+	    "Usage: %s [-dO] [ -F file ] [ -m netmask] [ -s snaplen ] dlt [ expression ]\n",
+	    program_name);
+	exit(1);
+}