svn commit: r221604 - head/usr.sbin/usbdump
Hans Petter Selasky
hselasky at FreeBSD.org
Sat May 7 16:28:24 UTC 2011
Author: hselasky
Date: Sat May 7 16:28:23 2011
New Revision: 221604
URL: http://svn.freebsd.org/changeset/base/221604
Log:
Minor usbdump update:
- Use memcpy() instead of bcopy().
- Replace all asserts() by standard error messages.
- Update usage().
MFC after: 7 days
Modified:
head/usr.sbin/usbdump/usbdump.c
Modified: head/usr.sbin/usbdump/usbdump.c
==============================================================================
--- head/usr.sbin/usbdump/usbdump.c Sat May 7 15:30:23 2011 (r221603)
+++ head/usr.sbin/usbdump/usbdump.c Sat May 7 16:28:23 2011 (r221604)
@@ -40,7 +40,6 @@
#include <dev/usb/usb.h>
#include <dev/usb/usb_pf.h>
#include <dev/usb/usbdi.h>
-#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
@@ -49,6 +48,8 @@
#include <string.h>
#include <time.h>
#include <unistd.h>
+#include <sysexits.h>
+#include <err.h>
struct usbcap {
int fd; /* fd for /dev/usbpf */
@@ -408,9 +409,15 @@ write_packets(struct usbcap *p, const ui
int ret;
ret = write(p->wfd, &len, sizeof(int));
- assert(ret == sizeof(int));
+ if (ret != sizeof(int)) {
+ err(EXIT_FAILURE, "Could not write length "
+ "field of USB data payload");
+ }
ret = write(p->wfd, data, datalen);
- assert(ret == datalen);
+ if (ret != datalen) {
+ err(EXIT_FAILURE, "Could not write "
+ "complete USB data payload");
+ }
}
static void
@@ -423,14 +430,16 @@ read_file(struct usbcap *p)
while ((ret = read(p->rfd, &datalen, sizeof(int))) == sizeof(int)) {
datalen = le32toh(datalen);
data = malloc(datalen);
- assert(data != NULL);
+ if (data == NULL)
+ errx(EX_SOFTWARE, "Out of memory.");
ret = read(p->rfd, data, datalen);
- assert(ret == datalen);
+ if (ret != datalen) {
+ err(EXIT_FAILURE, "Could not read complete "
+ "USB data payload");
+ }
print_packets(data, datalen);
free(data);
}
- if (ret == -1)
- fprintf(stderr, "read: %s\n", strerror(errno));
}
static void
@@ -466,14 +475,27 @@ init_rfile(struct usbcap *p)
p->rfd = open(r_arg, O_RDONLY);
if (p->rfd < 0) {
- fprintf(stderr, "open: %s (%s)\n", r_arg, strerror(errno));
- exit(EXIT_FAILURE);
+ err(EXIT_FAILURE, "Could not open "
+ "'%s' for read", r_arg);
}
ret = read(p->rfd, &uf, sizeof(uf));
- assert(ret == sizeof(uf));
- assert(le32toh(uf.magic) == USBCAP_FILEHDR_MAGIC);
- assert(uf.major == 0);
- assert(uf.minor == 2);
+ if (ret != sizeof(uf)) {
+ err(EXIT_FAILURE, "Could not read USB capture "
+ "file header");
+ }
+ if (le32toh(uf.magic) != USBCAP_FILEHDR_MAGIC) {
+ errx(EX_SOFTWARE, "Invalid magic field(0x%08x) "
+ "in USB capture file header.",
+ (unsigned int)le32toh(uf.magic));
+ }
+ if (uf.major != 0) {
+ errx(EX_SOFTWARE, "Invalid major version(%d) "
+ "field in USB capture file header.", (int)uf.major);
+ }
+ if (uf.minor != 2) {
+ errx(EX_SOFTWARE, "Invalid minor version(%d) "
+ "field in USB capture file header.", (int)uf.minor);
+ }
}
static void
@@ -484,15 +506,18 @@ init_wfile(struct usbcap *p)
p->wfd = open(w_arg, O_CREAT | O_TRUNC | O_WRONLY, S_IRUSR | S_IWUSR);
if (p->wfd < 0) {
- fprintf(stderr, "open: %s (%s)\n", w_arg, strerror(errno));
- exit(EXIT_FAILURE);
+ err(EXIT_FAILURE, "Could not open "
+ "'%s' for write", r_arg);
}
- bzero(&uf, sizeof(uf));
+ memset(&uf, 0, sizeof(uf));
uf.magic = htole32(USBCAP_FILEHDR_MAGIC);
uf.major = 0;
uf.minor = 2;
ret = write(p->wfd, (const void *)&uf, sizeof(uf));
- assert(ret == sizeof(uf));
+ if (ret != sizeof(uf)) {
+ err(EXIT_FAILURE, "Could not write "
+ "USB capture header");
+ }
}
static void
@@ -501,13 +526,13 @@ usage(void)
#define FMT " %-14s %s\n"
fprintf(stderr, "usage: usbdump [options]\n");
- fprintf(stderr, FMT, "-i ifname", "Listen on USB bus interface");
- fprintf(stderr, FMT, "-r file", "Read the raw packets from file");
- fprintf(stderr, FMT, "-s snaplen", "Snapshot bytes from each packet");
- fprintf(stderr, FMT, "-v", "Increases the verbose level");
- fprintf(stderr, FMT, "-w file", "Write the raw packets to file");
+ fprintf(stderr, FMT, "-i <usbusX>", "Listen on USB bus interface");
+ fprintf(stderr, FMT, "-r <file>", "Read the raw packets from file");
+ fprintf(stderr, FMT, "-s <snaplen>", "Snapshot bytes from each packet");
+ fprintf(stderr, FMT, "-v", "Increase the verbose level");
+ fprintf(stderr, FMT, "-w <file>", "Write the raw packets to file");
#undef FMT
- exit(1);
+ exit(EX_USAGE);
}
int
@@ -525,7 +550,7 @@ main(int argc, char *argv[])
int fd, o;
const char *optstring;
- bzero(&uc, sizeof(struct usbcap));
+ memset(&uc, 0, sizeof(struct usbcap));
optstring = "i:r:s:vw:";
while ((o = getopt(argc, argv, optstring)) != -1) {
@@ -565,20 +590,15 @@ main(int argc, char *argv[])
}
p->fd = fd = open("/dev/bpf", O_RDONLY);
- if (p->fd < 0) {
- fprintf(stderr, "(no devices found)\n");
- return (EXIT_FAILURE);
- }
+ if (p->fd < 0)
+ err(EXIT_FAILURE, "Could not open BPF device");
+
+ if (ioctl(fd, BIOCVERSION, (caddr_t)&bv) < 0)
+ err(EXIT_FAILURE, "BIOCVERSION ioctl failed");
- if (ioctl(fd, BIOCVERSION, (caddr_t)&bv) < 0) {
- fprintf(stderr, "BIOCVERSION: %s\n", strerror(errno));
- return (EXIT_FAILURE);
- }
if (bv.bv_major != BPF_MAJOR_VERSION ||
- bv.bv_minor < BPF_MINOR_VERSION) {
- fprintf(stderr, "kernel bpf filter out of date");
- return (EXIT_FAILURE);
- }
+ bv.bv_minor < BPF_MINOR_VERSION)
+ errx(EXIT_FAILURE, "Kernel BPF filter out of date");
/* USB transfers can be greater than 64KByte */
v = 1U << 16;
@@ -592,22 +612,16 @@ main(int argc, char *argv[])
if (ioctl(fd, BIOCSETIF, (caddr_t)&ifr) >= 0)
break;
}
- if (v == 0) {
- fprintf(stderr, "BIOCSBLEN: %s: No buffer size worked", i_arg);
- return (EXIT_FAILURE);
- }
+ if (v == 0)
+ errx(EXIT_FAILURE, "No buffer size worked.");
- if (ioctl(fd, BIOCGBLEN, (caddr_t)&v) < 0) {
- fprintf(stderr, "BIOCGBLEN: %s", strerror(errno));
- return (EXIT_FAILURE);
- }
+ if (ioctl(fd, BIOCGBLEN, (caddr_t)&v) < 0)
+ err(EXIT_FAILURE, "BIOCGBLEN ioctl failed");
p->bufsize = v;
p->buffer = (uint8_t *)malloc(p->bufsize);
- if (p->buffer == NULL) {
- fprintf(stderr, "malloc: %s", strerror(errno));
- return (EXIT_FAILURE);
- }
+ if (p->buffer == NULL)
+ errx(EX_SOFTWARE, "Out of memory.");
/* XXX no read filter rules yet so at this moment accept everything */
total_insn.code = (u_short)(BPF_RET | BPF_K);
@@ -617,27 +631,21 @@ main(int argc, char *argv[])
total_prog.bf_len = 1;
total_prog.bf_insns = &total_insn;
- if (ioctl(p->fd, BIOCSETF, (caddr_t)&total_prog) < 0) {
- fprintf(stderr, "BIOCSETF: %s", strerror(errno));
- return (EXIT_FAILURE);
- }
+ if (ioctl(p->fd, BIOCSETF, (caddr_t)&total_prog) < 0)
+ err(EXIT_FAILURE, "BIOCSETF ioctl failed");
/* 1 second read timeout */
tv.tv_sec = 1;
tv.tv_usec = 0;
- if (ioctl(p->fd, BIOCSRTIMEOUT, (caddr_t)&tv) < 0) {
- fprintf(stderr, "BIOCSRTIMEOUT: %s", strerror(errno));
- return (EXIT_FAILURE);
- }
+ if (ioctl(p->fd, BIOCSRTIMEOUT, (caddr_t)&tv) < 0)
+ err(EXIT_FAILURE, "BIOCSRTIMEOUT ioctl failed");
(void)signal(SIGINT, handle_sigint);
do_loop(p);
- if (ioctl(fd, BIOCGSTATS, (caddr_t)&us) < 0) {
- fprintf(stderr, "BIOCGSTATS: %s", strerror(errno));
- return (EXIT_FAILURE);
- }
+ if (ioctl(fd, BIOCGSTATS, (caddr_t)&us) < 0)
+ err(EXIT_FAILURE, "BIOCGSTATS ioctl failed");
/* XXX what's difference between pkt_captured and us.us_recv? */
printf("\n");
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