From mboxrd@z Thu Jan 1 00:00:00 1970 From: Florian Westphal Subject: [PATCH lnf-queue] src: PF_BIND/UNBIND is ignored in 3.8 and later Date: Thu, 24 Apr 2014 11:01:11 +0200 Message-ID: <1398330071-3463-1-git-send-email-fw@strlen.de> Cc: Florian Westphal To: netfilter-devel@vger.kernel.org Return-path: Received: from Chamillionaire.breakpoint.cc ([80.244.247.6]:36475 "EHLO Chamillionaire.breakpoint.cc" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755444AbaDXJGS (ORCPT ); Thu, 24 Apr 2014 05:06:18 -0400 Sender: netfilter-devel-owner@vger.kernel.org List-ID: There is confusion on what this command actually does and why examples commonly PF_UNBIND at startup. Since these are obsolete document that its not needed at all from 3.8 onwards and remove the unbind from the example program. Signed-off-by: Florian Westphal --- I'll push it later today if noone objets. diff --git a/examples/nf-queue.c b/examples/nf-queue.c index 1f465ad..4e0b227 100644 --- a/examples/nf-queue.c +++ b/examples/nf-queue.c @@ -136,17 +136,9 @@ int main(int argc, char *argv[]) exit(EXIT_FAILURE); } - nlh = nfq_hdr_put(buf, NFQNL_MSG_CONFIG, 0); - nfq_nlmsg_cfg_put_cmd(nlh, AF_INET, NFQNL_CFG_CMD_PF_UNBIND); - - if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) { - perror("mnl_socket_send"); - exit(EXIT_FAILURE); - } - + /* PF_BIND is not needed with kernels 3.8 and later */ nlh = nfq_hdr_put(buf, NFQNL_MSG_CONFIG, 0); nfq_nlmsg_cfg_put_cmd(nlh, AF_INET, NFQNL_CFG_CMD_PF_BIND); - if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) { perror("mnl_socket_send"); exit(EXIT_FAILURE); diff --git a/src/libnetfilter_queue.c b/src/libnetfilter_queue.c index 32725d1..740b340 100644 --- a/src/libnetfilter_queue.c +++ b/src/libnetfilter_queue.c @@ -455,8 +455,9 @@ EXPORT_SYMBOL(nfq_close); * \param h Netfilter queue connection handle obtained via call to nfq_open() * \param pf protocol family to bind to nfqueue handler obtained from nfq_open() * - * Binds the given queue connection handle to process packets belonging to + * Binds the given queue connection handle to process packets belonging to * the given protocol family (ie. PF_INET, PF_INET6, etc). + * This call is obsolete, Linux kernels from 3.8 onwards ignore it. * * \return integer inferior to 0 in case of failure */ @@ -473,6 +474,8 @@ EXPORT_SYMBOL(nfq_bind_pf); * * Unbinds the given queue connection handle from processing packets belonging * to the given protocol family. + * + * This call is obsolete, Linux kernels from 3.8 onwards ignore it. */ int nfq_unbind_pf(struct nfq_handle *h, u_int16_t pf) { diff --git a/src/nlmsg.c b/src/nlmsg.c index 81e170e..aebdd5e 100644 --- a/src/nlmsg.c +++ b/src/nlmsg.c @@ -77,10 +77,13 @@ EXPORT_SYMBOL(nfq_nlmsg_verdict_put_pkt); * subsystem is working. * - NFQNL_CFG_CMD_BIND: Binds the program to a specific queue. * - NFQNL_CFG_CMD_UNBIND: Unbinds the program to a specifiq queue. + * + * Obsolete commands: * - NFQNL_CFG_CMD_PF_BIND: Binds to process packets belonging to the given * protocol family (ie. PF_INET, PF_INET6, etc). * - NFQNL_CFG_CMD_PF_UNBIND: Unbinds from processing packets belonging to the - * given protocol family. + * given protocol family. Both commands are ignored by Linux kernel 3.8 and + * later versions. */ void nfq_nlmsg_cfg_put_cmd(struct nlmsghdr *nlh, uint16_t pf, uint8_t cmd) { -- 1.8.1.5