diff options
Diffstat (limited to 'testprogs/valgrindtest.c')
| -rw-r--r-- | testprogs/valgrindtest.c | 427 |
1 files changed, 427 insertions, 0 deletions
diff --git a/testprogs/valgrindtest.c b/testprogs/valgrindtest.c new file mode 100644 index 00000000..c2e3d790 --- /dev/null +++ b/testprogs/valgrindtest.c @@ -0,0 +1,427 @@ +/* + * 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" + +/* + * This doesn't actually test libpcap itself; it tests whether + * valgrind properly handles the APIs libpcap uses. If it doesn't, + * we end up getting patches submitted to "fix" references that + * valgrind claims are being made to uninitialized data, when, in + * fact, the OS isn't making any such references - or we get + * valgrind *not* detecting *actual* incorrect references. + * + * Both BPF and Linux socket filters aren't handled correctly + * by some versions of valgrind. See valgrind bug 318203 for + * Linux: + * + * https://bugs.kde.org/show_bug.cgi?id=318203 + * + * and valgrind bug 312989 for macOS: + * + * https://bugs.kde.org/show_bug.cgi?id=312989 + * + * The fixes for both of those are checked into the official valgrind + * repository. + * + * The unofficial FreeBSD port has similar issues to the official macOS + * port, for similar reasons. + */ +#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 <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <stdarg.h> +#include <unistd.h> +#include <fcntl.h> +#include <errno.h> +#include <arpa/inet.h> +#include <sys/types.h> +#include <sys/stat.h> + +#include "pcap/funcattrs.h" + +#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(_AIX) || defined(sun) +/* OS with BPF - use BPF */ +#define USE_BPF +#elif defined(linux) +/* Linux - use socket filters */ +#define USE_SOCKET_FILTERS +#else +#error "Unknown platform or platform that doesn't support Valgrind" +#endif + +#if defined(USE_BPF) + +#include <sys/ioctl.h> +#include <net/bpf.h> + +/* + * Make "pcap.h" not include "pcap/bpf.h"; we are going to include the + * native OS version, as we're going to be doing our own ioctls to + * make sure that, in the uninitialized-data tests, the filters aren't + * checked by libpcap before being handed to BPF. + */ +#define PCAP_DONT_INCLUDE_PCAP_BPF_H + +#elif defined(USE_SOCKET_FILTERS) + +#include <sys/socket.h> +#include <linux/types.h> +#include <linux/filter.h> + +#endif + +#include <pcap.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 warning(const char *, ...) PCAP_PRINTFLIKE(1, 2); + +/* + * 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 +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; +} + +#define INSN_COUNT 17 + +int +main(int argc, char **argv) +{ + char *cp, *device; + int op; + int dorfmon, useactivate; + char ebuf[PCAP_ERRBUF_SIZE]; + char *infile; + char *cmdbuf; + pcap_if_t *devlist; + pcap_t *pd; + int status = 0; + int pcap_fd; +#if defined(USE_BPF) + struct bpf_program bad_fcode; + struct bpf_insn uninitialized[INSN_COUNT]; +#elif defined(USE_SOCKET_FILTERS) + struct sock_fprog bad_fcode; + struct sock_filter uninitialized[INSN_COUNT]; +#endif + struct bpf_program fcode; + + device = NULL; + dorfmon = 0; + useactivate = 0; + infile = NULL; + + if ((cp = strrchr(argv[0], '/')) != NULL) + program_name = cp + 1; + else + program_name = argv[0]; + + opterr = 0; + while ((op = getopt(argc, argv, "aF:i:I")) != -1) { + switch (op) { + + case 'a': + useactivate = 1; + break; + + case 'F': + infile = optarg; + break; + + case 'i': + device = optarg; + break; + + case 'I': + dorfmon = 1; + useactivate = 1; /* required for rfmon */ + break; + + default: + usage(); + /* NOTREACHED */ + } + } + + if (device == NULL) { + /* + * No interface specified; get whatever pcap_lookupdev() + * finds. + */ + 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); + } + + if (infile != NULL) { + /* + * Filter specified with "-F" and a file containing + * a filter. + */ + cmdbuf = read_infile(infile); + } else { + if (optind < argc) { + /* + * Filter specified with arguments on the + * command line. + */ + cmdbuf = copy_argv(&argv[optind+1]); + } else { + /* + * No filter specified; use an empty string, which + * compiles to an "accept all" filter. + */ + cmdbuf = ""; + } + } + + if (useactivate) { + pd = pcap_create(device, ebuf); + if (pd == NULL) + error("%s: pcap_create() failed: %s", device, ebuf); + status = pcap_set_snaplen(pd, 65535); + if (status != 0) + error("%s: pcap_set_snaplen failed: %s", + device, pcap_statustostr(status)); + status = pcap_set_promisc(pd, 1); + if (status != 0) + error("%s: pcap_set_promisc failed: %s", + device, pcap_statustostr(status)); + if (dorfmon) { + status = pcap_set_rfmon(pd, 1); + if (status != 0) + error("%s: pcap_set_rfmon failed: %s", + device, pcap_statustostr(status)); + } + status = pcap_set_timeout(pd, 1000); + if (status != 0) + error("%s: pcap_set_timeout failed: %s", + device, pcap_statustostr(status)); + status = pcap_activate(pd); + if (status < 0) { + /* + * pcap_activate() failed. + */ + error("%s: %s\n(%s)", device, + pcap_statustostr(status), pcap_geterr(pd)); + } else if (status > 0) { + /* + * pcap_activate() succeeded, but it's warning us + * of a problem it had. + */ + warning("%s: %s\n(%s)", device, + pcap_statustostr(status), pcap_geterr(pd)); + } + } else { + *ebuf = '\0'; + pd = pcap_open_live(device, 65535, 1, 1000, ebuf); + if (pd == NULL) + error("%s", ebuf); + else if (*ebuf) + warning("%s", ebuf); + } + + pcap_fd = pcap_fileno(pd); + + /* + * Try setting a filter with an uninitialized bpf_program + * structure. This should cause valgrind to report a + * problem. + * + * We don't check for errors, because it could get an + * error due to a bad pointer or count. + */ +#if defined(USE_BPF) + ioctl(pcap_fd, BIOCSETF, &bad_fcode); +#elif defined(USE_SOCKET_FILTERS) + setsockopt(pcap_fd, SOL_SOCKET, SO_ATTACH_FILTER, &bad_fcode, + sizeof(bad_fcode)); +#endif + + /* + * Try setting a filter with an initialized bpf_program + * structure that points to an uninitialized program. + * That should also cause valgrind to report a problem. + * + * We don't check for errors, because it could get an + * error due to a bad pointer or count. + */ +#if defined(USE_BPF) + bad_fcode.bf_len = INSN_COUNT; + bad_fcode.bf_insns = uninitialized; + ioctl(pcap_fd, BIOCSETF, &bad_fcode); +#elif defined(USE_SOCKET_FILTERS) + bad_fcode.len = INSN_COUNT; + bad_fcode.filter = uninitialized; + setsockopt(pcap_fd, SOL_SOCKET, SO_ATTACH_FILTER, &bad_fcode, + sizeof(bad_fcode)); +#endif + + /* + * Now compile a filter and set the filter with that. + * That should *not* cause valgrind to report a + * problem. + */ + if (pcap_compile(pd, &fcode, cmdbuf, 1, 0) < 0) + error("can't compile filter: %s", pcap_geterr(pd)); + if (pcap_setfilter(pd, &fcode) < 0) + error("can't set filter: %s", pcap_geterr(pd)); + + pcap_close(pd); + exit(status < 0 ? 1 : 0); +} + +static void +usage(void) +{ + (void)fprintf(stderr, "%s, with %s\n", program_name, + pcap_lib_version()); + (void)fprintf(stderr, + "Usage: %s [-aI] [ -F file ] [ -I interface ] [ expression ]\n", + program_name); + exit(1); +} |