Date: Tue, 21 Jan 2014 08:24:12 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r260978 - head/usr.sbin/usbdump Message-ID: <201401210824.s0L8OC83058541@svn.freebsd.org>
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Author: hselasky Date: Tue Jan 21 08:24:12 2014 New Revision: 260978 URL: http://svnweb.freebsd.org/changeset/base/260978 Log: Add check for "hw.usb.no_pf" sysctl value. Submitted by: Warren Block <wblock@wonkity.com> MFC after: 1 week Modified: head/usr.sbin/usbdump/usbdump.c Modified: head/usr.sbin/usbdump/usbdump.c ============================================================================== --- head/usr.sbin/usbdump/usbdump.c Tue Jan 21 05:56:35 2014 (r260977) +++ head/usr.sbin/usbdump/usbdump.c Tue Jan 21 08:24:12 2014 (r260978) @@ -34,6 +34,7 @@ #include <sys/ioctl.h> #include <sys/socket.h> #include <sys/stat.h> +#include <sys/sysctl.h> #include <sys/utsname.h> #include <sys/queue.h> #include <net/if.h> @@ -780,6 +781,23 @@ usage(void) exit(EX_USAGE); } +static void +check_usb_pf_sysctl(void) +{ + int error; + int no_pf_val = 0; + size_t no_pf_len = sizeof(int); + + /* check "hw.usb.no_pf" sysctl for 8- and 9- stable */ + + error = sysctlbyname("hw.usb.no_pf", &no_pf_val, + &no_pf_len, NULL, 0); + if (error == 0 && no_pf_val != 0) { + warnx("The USB packet filter might be disabled."); + warnx("See the \"hw.usb.no_pf\" sysctl for more information."); + } +} + int main(int argc, char *argv[]) { @@ -872,6 +890,8 @@ main(int argc, char *argv[]) exit(EXIT_SUCCESS); } + check_usb_pf_sysctl(); + p->fd = fd = open("/dev/bpf", O_RDONLY); if (p->fd < 0) err(EXIT_FAILURE, "Could not open BPF device");
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