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From devnull@lkml.org Fri Apr 19 03:52:03 2024 Received: from vger.kernel.org (vger.kernel.org [209.116.70.75]) by kylie.puddingonline.com (8.11.6/8.11.6) with ESMTP id g9373jU11060 for ; Thu, 3 Oct 2002 09:03:45 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 3 Oct 2002 02:55:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 3 Oct 2002 02:55:12 -0400 Received: from netcore.fi ([193.94.160.1]:38154 "EHLO netcore.fi") by vger.kernel.org with ESMTP id ; Thu, 3 Oct 2002 02:54:38 -0400 Received: from localhost (pekkas@localhost) by netcore.fi (8.11.6/8.11.6) with ESMTP id g93700S04849; Thu, 3 Oct 2002 10:00:01 +0300 Date: Thu, 3 Oct 2002 10:00:00 +0300 (EEST) From: Pekka Savola To: YOSHIFUJI Hideaki / =?iso-2022-jp?B?GyRCNUhGIzFRTEAbKEI=?= Cc: linux-kernel@vger.kernel.org, , Subject: Re: [PATCH] IPv6: Allow Both IPv6 and IPv4 Sockets on the Same Port Number (IPV6_V6ONLY Support) In-Reply-To: <20021003.121350.119660876.yoshfuji@linux-ipv6.org> Message-Id: Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org Please add a short description of 'bindv6only' in Documentation/networking/ip-sysctl.txt. This toggle seems usable only in interface "all" context. Didn't really look at the rest of the patch. On Thu, 3 Oct 2002, YOSHIFUJI Hideaki / [iso-2022-jp] 吉藤英明 wrote: > Hello! > > Linux IPv6 stack provides the ability for IPv6 applications to > interoperate with IPv4 applications. Port space for TCP (or UDP) is > shared by IPv6 and IPv4. This conforms to RFC2553. > However, some kind of applications may want to restrict their use of > an IPv6 socket to IPv6 communication only. IPV6_V6ONLY socket option is > defined for such applications in RFC2553bis, which is successor of RFC2553. > This patch allows to bind both IPv6 and IPv4 sockets with the single > port number at the same time if IPV6_V6ONLY socket options is set to > the IPv6 socket. > > We also prohibit a completely duplicate set of (local-addr, local-port, > remote-addr, remote-port) set even if SO_REUSEADDR is set unless > the local address is a multicast address; it is ambiguous and it may > steal packets from others; i.e. a kind of DoS. > > Packet delivery strategy is similar to one before, but we prefer > IPv4 a bit. > > Following patch is against linux-2.4.19. > > Thank you in advance. > > ------------------------------------------------------------------- > Patch-Name: Allow Both IPv6 and IPv4 Sockets on the Same Port Number (IPV6_V6ONLY Support) > Patch-Id: FIX_2_4_19_DOUBLEBIND-20020909 > Patch-Author: YOSHIFUJI Hideaki / USAGI Project > Credit: YOSHIFUJI Hideaki / USAGI Project > Reference: RFC2553bis > ------------------------------------------------------------------- > Index: include/linux/in6.h > =================================================================== > RCS file: /cvsroot/usagi/usagi-backport/linux24/include/linux/in6.h,v > retrieving revision 1.1.1.1 > retrieving revision 1.1.1.1.8.1 > diff -u -r1.1.1.1 -r1.1.1.1.8.1 > --- include/linux/in6.h 2002/08/20 09:46:34 1.1.1.1 > +++ include/linux/in6.h 2002/09/11 03:30:27 1.1.1.1.8.1 > @@ -156,6 +156,7 @@ > #define IPV6_MTU_DISCOVER 23 > #define IPV6_MTU 24 > #define IPV6_RECVERR 25 > +#define IPV6_V6ONLY 26 > > /* IPV6_MTU_DISCOVER values */ > #define IPV6_PMTUDISC_DONT 0 > @@ -167,4 +168,19 @@ > #define IPV6_FLOWINFO_SEND 33 > > > +#ifdef __KERNEL__ > +#ifndef IN6_IS_ADDR_UNSPECIFIED > +#define IN6_IS_ADDR_UNSPECIFIED(a) \ > + ((((a)->s6_addr32[0]) == 0) && \ > + (((a)->s6_addr32[1]) == 0) && \ > + (((a)->s6_addr32[2]) == 0) && \ > + (((a)->s6_addr32[3]) == 0)) > +#endif > +#ifndef IN6_IS_ADDR_V4MAPPED > +#define IN6_IS_ADDR_V4MAPPED(a) \ > + ((((a)->s6_addr32[0]) == 0) && \ > + (((a)->s6_addr32[1]) == 0) && \ > + (((a)->s6_addr32[2]) == __constant_htonl(0x0000ffff))) > +#endif > +#endif > #endif > Index: include/linux/sysctl.h > =================================================================== > RCS file: /cvsroot/usagi/usagi-backport/linux24/include/linux/sysctl.h,v > retrieving revision 1.1.1.1 > retrieving revision 1.1.1.1.8.1 > diff -u -r1.1.1.1 -r1.1.1.1.8.1 > --- include/linux/sysctl.h 2002/08/20 09:46:34 1.1.1.1 > +++ include/linux/sysctl.h 2002/09/11 03:30:27 1.1.1.1.8.1 > @@ -369,7 +369,8 @@ > NET_IPV6_DAD_TRANSMITS=7, > NET_IPV6_RTR_SOLICITS=8, > NET_IPV6_RTR_SOLICIT_INTERVAL=9, > - NET_IPV6_RTR_SOLICIT_DELAY=10 > + NET_IPV6_RTR_SOLICIT_DELAY=10, > + NET_IPV6_BINDV6ONLY=11 > }; > > /* /proc/sys/net//neigh/ */ > Index: include/net/if_inet6.h > =================================================================== > RCS file: /cvsroot/usagi/usagi-backport/linux24/include/net/if_inet6.h,v > retrieving revision 1.1.1.1 > retrieving revision 1.1.1.1.8.1 > diff -u -r1.1.1.1 -r1.1.1.1.8.1 > --- include/net/if_inet6.h 2002/08/20 09:46:45 1.1.1.1 > +++ include/net/if_inet6.h 2002/09/11 03:30:27 1.1.1.1.8.1 > @@ -86,6 +86,7 @@ > int rtr_solicits; > int rtr_solicit_interval; > int rtr_solicit_delay; > + int bindv6only; > > void *sysctl; > }; > Index: include/net/sock.h > =================================================================== > RCS file: /cvsroot/usagi/usagi-backport/linux24/include/net/sock.h,v > retrieving revision 1.1.1.1 > retrieving revision 1.1.1.1.8.1 > diff -u -r1.1.1.1 -r1.1.1.1.8.1 > --- include/net/sock.h 2002/08/20 09:46:45 1.1.1.1 > +++ include/net/sock.h 2002/09/11 03:30:27 1.1.1.1.8.1 > @@ -171,7 +171,8 @@ > __u8 mc_loop:1, > recverr:1, > sndflow:1, > - pmtudisc:2; > + pmtudisc:2, > + ipv6only:1; > > struct ipv6_mc_socklist *ipv6_mc_list; > struct ipv6_fl_socklist *ipv6_fl_list; > Index: net/ipv4/tcp_ipv4.c > =================================================================== > RCS file: /cvsroot/usagi/usagi-backport/linux24/net/ipv4/tcp_ipv4.c,v > retrieving revision 1.1.1.1 > retrieving revision 1.1.1.1.8.1 > diff -u -r1.1.1.1 -r1.1.1.1.8.1 > --- net/ipv4/tcp_ipv4.c 2002/08/20 09:47:02 1.1.1.1 > +++ net/ipv4/tcp_ipv4.c 2002/09/11 03:30:27 1.1.1.1.8.1 > @@ -45,6 +45,14 @@ > * Vitaly E. Lavrov : Transparent proxy revived after year coma. > * Andi Kleen : Fix new listen. > * Andi Kleen : Fix accept error reporting. > + * YOSHIFUJI Hideaki @USAGI: Reworked bind(2) behavior including: > + * - Allow ipv6 and ipv4 bind(2) to the > + * same port if IPV6_V6ONLY socket option > + * is set. > + * - Don't allow binding to the same > + * address unless it is one of multi- > + * cast address even if SO_REUSEADDR > + * is set. > */ > > #include > @@ -177,23 +185,92 @@ > static inline int tcp_bind_conflict(struct sock *sk, struct tcp_bind_bucket *tb) > { > struct sock *sk2 = tb->owners; > - int sk_reuse = sk->reuse; > + int sk_reuse, sk2_reuse; > + int addr_type2; > + int ret; > + > + sk_reuse = 0; > + if (sk->reuse) > + sk_reuse |= 1; > > for( ; sk2 != NULL; sk2 = sk2->bind_next) { > - if (sk != sk2 && > - sk2->reuse <= 1 && > - sk->bound_dev_if == sk2->bound_dev_if) { > - if (!sk_reuse || > - !sk2->reuse || > - sk2->state == TCP_LISTEN) { > - if (!sk2->rcv_saddr || > - !sk->rcv_saddr || > - (sk2->rcv_saddr == sk->rcv_saddr)) > - break; > + int both_specified = 0; > + > + if (sk2 == sk || > + (sk2->bound_dev_if && sk->bound_dev_if && > + sk2->bound_dev_if != sk->bound_dev_if)) > + continue; > + > +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) > + if (sk2->family == AF_INET6) { > + struct in6_addr *sk2_rcv_saddr6 = sk2->state != TCP_TIME_WAIT ? > + &sk2->net_pinfo.af_inet6.rcv_saddr : > + &((struct tcp_tw_bucket*)sk2)->v6_rcv_saddr; > + if (IN6_IS_ADDR_UNSPECIFIED(sk2_rcv_saddr6)) > + addr_type2 = IPV6_ADDR_ANY; > + else if (IN6_IS_ADDR_V4MAPPED(sk2_rcv_saddr6)) > + addr_type2 = IPV6_ADDR_MAPPED; > + else > + addr_type2 = IPV6_ADDR_UNICAST; /*XXX*/ > + } else > + addr_type2 = IPV6_ADDR_MAPPED; > +#else > + addr_type2 = IPV6_ADDR_MAPPED; > +#endif > + if ((addr_type2 != IPV6_ADDR_MAPPED ? addr_type2 != IPV6_ADDR_ANY : sk2->rcv_saddr) && > + sk->rcv_saddr) { > + if (sk2->rcv_saddr != sk->rcv_saddr) > + continue; > + both_specified = 1; > + } > + > +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) > + if (addr_type2 != IPV6_ADDR_MAPPED && sk2->net_pinfo.af_inet6.ipv6only) { > + continue; > + } > +#endif > + > + sk2_reuse = 0; > + if (sk2->reuse) > + sk2_reuse |= 1; > + > + if (sk2_reuse & sk_reuse & 3) { /* NOT && */ > + ret = 1; > + if (both_specified) { > +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) > + struct in6_addr *sk2_daddr6 = sk2->state != TCP_TIME_WAIT ? > + &sk2->net_pinfo.af_inet6.daddr : > + &((struct tcp_tw_bucket*)sk2)->v6_daddr; > +#endif > + int addr_type2d; > +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) > + if (sk2->family == AF_INET6) { > + if (IN6_IS_ADDR_UNSPECIFIED(sk2_daddr6)) > + addr_type2d = IPV6_ADDR_ANY; > + else if (IN6_IS_ADDR_V4MAPPED(sk2_daddr6)) > + addr_type2d = IPV6_ADDR_MAPPED; > + else > + addr_type2d = IPV6_ADDR_UNICAST; /*XXX*/ > + } else > + addr_type2d = IPV6_ADDR_MAPPED; > +#else > + addr_type2d = IPV6_ADDR_MAPPED; > +#endif > + if (addr_type2d != IPV6_ADDR_MAPPED ? addr_type2d != IPV6_ADDR_ANY : sk2->daddr) > + continue; > + } else { > + if ((addr_type2 != IPV6_ADDR_MAPPED ? addr_type2 != IPV6_ADDR_ANY : sk2->rcv_saddr) || > + sk->rcv_saddr) > + continue; > } > } > + ret = 1; > + goto failed; > } > - return sk2 != NULL; > + /* If we found a conflict, fail. */ > + ret = sk2 != NULL; > +failed: > + return ret; > } > > /* Obtain a reference to a local port for the given sock, > @@ -247,10 +324,11 @@ > break; > } > if (tb != NULL && tb->owners != NULL) { > - if (sk->reuse > 1) > + ret = 1; > + if (tb->fastreuse > 0 && > + sk->reuse != 0 && > + sk->state != TCP_LISTEN) { > goto success; > - if (tb->fastreuse > 0 && sk->reuse != 0 && sk->state != TCP_LISTEN) { > - goto success; > } else { > ret = 1; > if (tcp_bind_conflict(sk, tb)) > @@ -418,23 +496,31 @@ > struct sock *result = NULL; > int score, hiscore; > > - hiscore=0; > + hiscore = -1; > for(; sk; sk = sk->next) { > if(sk->num == hnum) { > __u32 rcv_saddr = sk->rcv_saddr; > > +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) > + score = 0; > + if (sk->family == PF_INET) > + score++; > + else if (sk->net_pinfo.af_inet6.ipv6only) > + continue; > +#else > score = 1; > +#endif > if(rcv_saddr) { > if (rcv_saddr != daddr) > continue; > - score++; > + score+=2; > } > if (sk->bound_dev_if) { > if (sk->bound_dev_if != dif) > continue; > - score++; > + score+=2; > } > - if (score == 3) > + if (score == 5) > return sk; > if (score > hiscore) { > hiscore = score; > @@ -456,6 +542,10 @@ > if (sk->num == hnum && > sk->next == NULL && > (!sk->rcv_saddr || sk->rcv_saddr == daddr) && > +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) > + (sk->family == PF_INET || > + (sk->family == PF_INET6 && !sk->net_pinfo.af_inet6.ipv6only)) && > +#endif > !sk->bound_dev_if) > goto sherry_cache; > sk = __tcp_v4_lookup_listener(sk, daddr, hnum, dif); > Index: net/ipv4/udp.c > =================================================================== > RCS file: /cvsroot/usagi/usagi-backport/linux24/net/ipv4/udp.c,v > retrieving revision 1.1.1.1 > retrieving revision 1.1.1.1.8.1 > diff -u -r1.1.1.1 -r1.1.1.1.8.1 > --- net/ipv4/udp.c 2002/08/20 09:47:02 1.1.1.1 > +++ net/ipv4/udp.c 2002/09/11 03:30:27 1.1.1.1.8.1 > @@ -61,6 +61,14 @@ > * return ENOTCONN for unconnected sockets (POSIX) > * Janos Farkas : don't deliver multi/broadcasts to a different > * bound-to-device socket > + * YOSHIFUJI Hideaki @USAGI: Reworked bind(2) behavior, including: > + * - Allow ipv6 and ipv4 bind(2) to the > + * same port if IPV6_V6ONLY socket opttion is > + * is set. > + * - Don't allow binding to the same > + * address unless it is one of multi- > + * cast address even if SO_REUSEADDR > + * is set. > * > * > * This program is free software; you can redistribute it and/or > @@ -85,6 +93,7 @@ > #include > #include > #include > +#include > #include > #include > #include > @@ -153,18 +162,88 @@ > udp_port_rover = snum = result; > } else { > struct sock *sk2; > + int sk_reuse, sk2_reuse; > + int addr_type2; > > + sk_reuse = 0; > + if (sk->reuse) > + sk_reuse |= 1; > + if (sk_reuse && > + MULTICAST(sk->rcv_saddr)) > + sk_reuse |= 4; > + > for (sk2 = udp_hash[snum & (UDP_HTABLE_SIZE - 1)]; > sk2 != NULL; > sk2 = sk2->next) { > - if (sk2->num == snum && > - sk2 != sk && > - sk2->bound_dev_if == sk->bound_dev_if && > - (!sk2->rcv_saddr || > - !sk->rcv_saddr || > - sk2->rcv_saddr == sk->rcv_saddr) && > - (!sk2->reuse || !sk->reuse)) > - goto fail; > + int both_specified = 0; > + > + if (sk2->num != snum || > + sk2 == sk || > + (sk2->bound_dev_if && sk->bound_dev_if && > + sk2->bound_dev_if != sk->bound_dev_if)) > + continue; > + > +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) > + if (sk2->family == AF_INET6) { > + if (IN6_IS_ADDR_UNSPECIFIED(&sk2->net_pinfo.af_inet6.rcv_saddr)) > + addr_type2 = IPV6_ADDR_ANY; > + else if (IN6_IS_ADDR_V4MAPPED(&sk2->net_pinfo.af_inet6.rcv_saddr)) > + addr_type2 = IPV6_ADDR_MAPPED; > + else > + addr_type2 = IPV6_ADDR_UNICAST; /*XXX*/ > + } else > + addr_type2 = IPV6_ADDR_MAPPED; > +#else > + addr_type2 = IPV6_ADDR_MAPPED; > +#endif > + > + if ((addr_type2 != IPV6_ADDR_MAPPED ? addr_type2 != IPV6_ADDR_ANY : sk2->rcv_saddr) && > + sk->rcv_saddr) { > + if (sk2->rcv_saddr != sk->rcv_saddr) > + continue; > + both_specified = 1; > + } > + > +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) > + if (addr_type2 != IPV6_ADDR_MAPPED && sk2->net_pinfo.af_inet6.ipv6only) { > + continue; > + } > +#endif > + > + sk2_reuse = 0; > + if (sk2->reuse) > + sk2_reuse |= 1; > + if (sk2_reuse && > + (addr_type2 != IPV6_ADDR_MAPPED ? (addr_type2 & IPV6_ADDR_MULTICAST) : MULTICAST(sk2->rcv_saddr))) > + sk2_reuse |= 4; > + > + if (sk2_reuse & sk_reuse & 3) { /* NOT && */ > + if (sk2_reuse & sk_reuse & 4) > + continue; > + if (both_specified) { > + int addr_type2d; > +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) > + if (sk2->family == AF_INET6) { > + if (IN6_IS_ADDR_UNSPECIFIED(&sk2->net_pinfo.af_inet6.daddr)) > + addr_type2d = IPV6_ADDR_ANY; > + else if (IN6_IS_ADDR_V4MAPPED(&sk2->net_pinfo.af_inet6.daddr)) > + addr_type2d = IPV6_ADDR_MAPPED; > + else > + addr_type2d = IPV6_ADDR_UNICAST; /*XXX*/ > + } else > + addr_type2d = IPV6_ADDR_MAPPED; > +#else > + addr_type2d = IPV6_ADDR_MAPPED; > +#endif > + if (addr_type2d != IPV6_ADDR_MAPPED ? addr_type2d != IPV6_ADDR_ANY : sk2->daddr) > + continue; > + } else { > + if ((addr_type2 != IPV6_ADDR_MAPPED ? addr_type2 != IPV6_ADDR_ANY : sk2->rcv_saddr) || > + sk->rcv_saddr) > + continue; > + } > + } > + goto fail; > } > } > sk->num = snum; > @@ -216,28 +295,37 @@ > > for(sk = udp_hash[hnum & (UDP_HTABLE_SIZE - 1)]; sk != NULL; sk = sk->next) { > if(sk->num == hnum) { > - int score = 0; > + int score; > +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) > + score = 0; > + if(sk->family == PF_INET) > + score++; > + else if (sk->net_pinfo.af_inet6.ipv6only) > + continue; > +#else > + score = 1; > +#endif > if(sk->rcv_saddr) { > if(sk->rcv_saddr != daddr) > continue; > - score++; > + score+=2; > } > if(sk->daddr) { > if(sk->daddr != saddr) > continue; > - score++; > + score+=2; > } > if(sk->dport) { > if(sk->dport != sport) > continue; > - score++; > + score+=2; > } > if(sk->bound_dev_if) { > if(sk->bound_dev_if != dif) > continue; > - score++; > + score+=2; > } > - if(score == 4) { > + if(score == 9) { > result = sk; > break; > } else if(score > badness) { > @@ -273,6 +361,9 @@ > (s->daddr && s->daddr!=rmt_addr) || > (s->dport != rmt_port && s->dport != 0) || > (s->rcv_saddr && s->rcv_saddr != loc_addr) || > +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) > + (s->family != PF_INET && s->net_pinfo.af_inet6.ipv6only) || > +#endif > (s->bound_dev_if && s->bound_dev_if != dif)) > continue; > break; > Index: net/ipv6/addrconf.c > =================================================================== > RCS file: /cvsroot/usagi/usagi-backport/linux24/net/ipv6/addrconf.c,v > retrieving revision 1.1.1.1 > retrieving revision 1.1.1.1.8.1 > diff -u -r1.1.1.1 -r1.1.1.1.8.1 > --- net/ipv6/addrconf.c 2002/08/20 09:47:02 1.1.1.1 > +++ net/ipv6/addrconf.c 2002/09/11 03:30:27 1.1.1.1.8.1 > @@ -116,6 +116,7 @@ > MAX_RTR_SOLICITATIONS, /* router solicits */ > RTR_SOLICITATION_INTERVAL, /* rtr solicit interval */ > MAX_RTR_SOLICITATION_DELAY, /* rtr solicit delay */ > + bindv6only: 0, > }; > > static struct ipv6_devconf ipv6_devconf_dflt = > @@ -130,6 +131,7 @@ > MAX_RTR_SOLICITATIONS, /* router solicits */ > RTR_SOLICITATION_INTERVAL, /* rtr solicit interval */ > MAX_RTR_SOLICITATION_DELAY, /* rtr solicit delay */ > + bindv6only: 0, > }; > > int ipv6_addr_type(struct in6_addr *addr) > @@ -1879,7 +1881,7 @@ > static struct addrconf_sysctl_table > { > struct ctl_table_header *sysctl_header; > - ctl_table addrconf_vars[11]; > + ctl_table addrconf_vars[12]; > ctl_table addrconf_dev[2]; > ctl_table addrconf_conf_dir[2]; > ctl_table addrconf_proto_dir[2]; > @@ -1925,6 +1927,10 @@ > {NET_IPV6_RTR_SOLICIT_DELAY, "router_solicitation_delay", > &ipv6_devconf.rtr_solicit_delay, sizeof(int), 0644, NULL, > &proc_dointvec_jiffies}, > + > + {NET_IPV6_BINDV6ONLY, "bindv6only", > + &ipv6_devconf.bindv6only, sizeof(int), 0644, NULL, > + &proc_dointvec}, > > {0}}, > > Index: net/ipv6/af_inet6.c > =================================================================== > RCS file: /cvsroot/usagi/usagi-backport/linux24/net/ipv6/af_inet6.c,v > retrieving revision 1.1.1.1 > retrieving revision 1.1.1.1.8.1 > diff -u -r1.1.1.1 -r1.1.1.1.8.1 > --- net/ipv6/af_inet6.c 2002/08/20 09:47:02 1.1.1.1 > +++ net/ipv6/af_inet6.c 2002/09/11 03:30:27 1.1.1.1.8.1 > @@ -173,6 +173,8 @@ > sk->net_pinfo.af_inet6.mc_loop = 1; > sk->net_pinfo.af_inet6.pmtudisc = IPV6_PMTUDISC_WANT; > > + sk->net_pinfo.af_inet6.ipv6only = ipv6_devconf.bindv6only; > + > /* Init the ipv4 part of the socket since we can have sockets > * using v6 API for ipv4. > */ > @@ -248,6 +250,8 @@ > > /* Check if the address belongs to the host. */ > if (addr_type == IPV6_ADDR_MAPPED) { > + if (sk->net_pinfo.af_inet6.ipv6only) > + return -EADDRNOTAVAIL; > v4addr = addr->sin6_addr.s6_addr32[3]; > if (inet_addr_type(v4addr) != RTN_LOCAL) > return -EADDRNOTAVAIL; > Index: net/ipv6/ipv6_sockglue.c > =================================================================== > RCS file: /cvsroot/usagi/usagi-backport/linux24/net/ipv6/ipv6_sockglue.c,v > retrieving revision 1.1.1.1 > retrieving revision 1.1.1.1.8.1 > diff -u -r1.1.1.1 -r1.1.1.1.8.1 > --- net/ipv6/ipv6_sockglue.c 2002/08/20 09:47:02 1.1.1.1 > +++ net/ipv6/ipv6_sockglue.c 2002/09/11 03:30:27 1.1.1.1.8.1 > @@ -380,6 +380,15 @@ > retv = ipv6_flowlabel_opt(sk, optval, optlen); > break; > > + case IPV6_V6ONLY: > + if (optlen != sizeof(int)) > + goto e_inval; > + if (sk->userlocks&SOCK_BINDADDR_LOCK) > + goto e_inval; > + np->ipv6only = valbool; > + retv = 0; > + break; > + > #ifdef CONFIG_NETFILTER > default: > retv = nf_setsockopt(sk, PF_INET6, optname, optval, > @@ -520,6 +529,10 @@ > > case IPV6_FLOWINFO_SEND: > val = np->sndflow; > + break; > + > + case IPV6_V6ONLY: > + val = np->ipv6only; > break; > > default: > Index: net/ipv6/tcp_ipv6.c > =================================================================== > RCS file: /cvsroot/usagi/usagi-backport/linux24/net/ipv6/tcp_ipv6.c,v > retrieving revision 1.1.1.1 > retrieving revision 1.1.1.1.8.1 > diff -u -r1.1.1.1 -r1.1.1.1.8.1 > --- net/ipv6/tcp_ipv6.c 2002/08/20 09:47:02 1.1.1.1 > +++ net/ipv6/tcp_ipv6.c 2002/09/11 03:30:27 1.1.1.1.8.1 > @@ -14,6 +14,14 @@ > * > * Fixes: > * Hideaki YOSHIFUJI : sin6_scope_id support > + * YOSHIFUJI Hideaki @USAGI: Reworked bind(2) behavior, including: > + * - Allow ipv6 and ipv4 bind(2) to the > + * same port if IPV6_V6ONLY socket > + * option is set. > + * - Don't allow binding to the same > + * address unless it is one of multi- > + * cast address even if SO_REUSEADDR > + * is set. > * > * This program is free software; you can redistribute it and/or > * modify it under the terms of the GNU General Public License > @@ -137,28 +145,70 @@ > goto success; > } else { > struct sock *sk2 = tb->owners; > - int sk_reuse = sk->reuse; > - int addr_type = ipv6_addr_type(&sk->net_pinfo.af_inet6.rcv_saddr); > + int sk_reuse, sk2_reuse; > + struct in6_addr *sk_rcv_saddr6 = sk->state != TCP_TIME_WAIT ? > + &sk->net_pinfo.af_inet6.rcv_saddr: > + &((struct tcp_tw_bucket*)sk)->v6_rcv_saddr; > + int addr_type = ipv6_addr_type(sk_rcv_saddr6), > + addr_type2; > + > + sk_reuse = 0; > + if (sk->reuse) > + sk_reuse |= 1; > > /* We must walk the whole port owner list in this case. -DaveM */ > for( ; sk2 != NULL; sk2 = sk2->bind_next) { > - if (sk != sk2 && > - sk->bound_dev_if == sk2->bound_dev_if) { > - if (!sk_reuse || > - !sk2->reuse || > - sk2->state == TCP_LISTEN) { > - /* NOTE: IPv6 tw bucket have different format */ > - if (!sk2->rcv_saddr || > - addr_type == IPV6_ADDR_ANY || > - !ipv6_addr_cmp(&sk->net_pinfo.af_inet6.rcv_saddr, > - sk2->state != TCP_TIME_WAIT ? > - &sk2->net_pinfo.af_inet6.rcv_saddr : > - &((struct tcp_tw_bucket*)sk)->v6_rcv_saddr) || > - (addr_type==IPV6_ADDR_MAPPED && sk2->family==AF_INET && > - sk->rcv_saddr==sk2->rcv_saddr)) > - break; > + int both_specified = 0; > + struct in6_addr *sk2_rcv_saddr6; > + if (sk2 == sk || > + (sk2->bound_dev_if && sk->bound_dev_if && > + sk2->bound_dev_if != sk->bound_dev_if)) > + continue; > + sk2_rcv_saddr6 = sk2->state != TCP_TIME_WAIT ? > + &sk2->net_pinfo.af_inet6.rcv_saddr : > + &((struct tcp_tw_bucket*)sk2)->v6_rcv_saddr; > + > + if ((addr_type2 != IPV6_ADDR_MAPPED ? addr_type2 != IPV6_ADDR_ANY : sk2->rcv_saddr) && > + (addr_type != IPV6_ADDR_MAPPED ? addr_type != IPV6_ADDR_ANY : sk->rcv_saddr)) { > + if (addr_type2 == IPV6_ADDR_MAPPED || addr_type == IPV6_ADDR_MAPPED) { > + if (addr_type2 != addr_type || > + sk2->rcv_saddr != sk->rcv_saddr) > + continue; > + } else { > + if (ipv6_addr_cmp(sk2_rcv_saddr6, sk_rcv_saddr6)) > + continue; > } > + both_specified = 1; > } > + > + if ((addr_type2 == IPV6_ADDR_MAPPED && > + addr_type != IPV6_ADDR_MAPPED && sk->net_pinfo.af_inet6.ipv6only) || > + (addr_type == IPV6_ADDR_MAPPED && > + addr_type2 != IPV6_ADDR_MAPPED && sk2->net_pinfo.af_inet6.ipv6only)) { > + continue; > + } > + > + sk2_reuse = 0; > + if (sk2->reuse) > + sk2_reuse |= 1; > + > + if (sk2_reuse & sk_reuse & 3) { /* NOT && */ > + ret = 1; > + if (both_specified) { > + struct in6_addr *sk2_daddr6 = sk2->state != TCP_TIME_WAIT ? > + &sk2->net_pinfo.af_inet6.daddr : > + &((struct tcp_tw_bucket*)sk2)->v6_daddr; > + int addr_type2d = sk2->family == AF_INET6 ? ipv6_addr_type(sk2_daddr6) : IPV6_ADDR_MAPPED; > + if (addr_type2d != IPV6_ADDR_MAPPED ? addr_type2d != IPV6_ADDR_ANY : sk2->daddr) > + continue; > + } else { > + if ((addr_type2 != IPV6_ADDR_MAPPED ? addr_type2 != IPV6_ADDR_ANY : sk2->rcv_saddr) || > + (addr_type != IPV6_ADDR_MAPPED ? addr_type != IPV6_ADDR_ANY : sk->rcv_saddr)) > + continue; > + } > + } > + ret = 1; > + goto fail_unlock; > } > /* If we found a conflict, fail. */ > ret = 1; > @@ -601,6 +651,9 @@ > struct sockaddr_in sin; > > SOCK_DEBUG(sk, "connect: ipv4 mapped\n"); > + > + if (sk->net_pinfo.af_inet6.ipv6only) > + return -ENETUNREACH; > > sin.sin_family = AF_INET; > sin.sin_port = usin->sin6_port; > Index: net/ipv6/udp.c > =================================================================== > RCS file: /cvsroot/usagi/usagi-backport/linux24/net/ipv6/udp.c,v > retrieving revision 1.1.1.1 > retrieving revision 1.1.1.1.8.1 > diff -u -r1.1.1.1 -r1.1.1.1.8.1 > --- net/ipv6/udp.c 2002/08/20 09:47:02 1.1.1.1 > +++ net/ipv6/udp.c 2002/09/11 03:30:27 1.1.1.1.8.1 > @@ -11,7 +11,16 @@ > * > * Fixes: > * Hideaki YOSHIFUJI : sin6_scope_id support > + * YOSHIFUJI Hideaki @USAGI: Reworked bind(2) behavior, including: > + * - Allow ipv6 and ipv4 bind(2) to the > + * same port if IPV6_V6ONLY socket > + * option is set. > + * - Don't allow binding to the same > + * address unless it is one of multi- > + * cast address even if SO_REUSEADDR > + * is set. > * > + * > * This program is free software; you can redistribute it and/or > * modify it under the terms of the GNU General Public License > * as published by the Free Software Foundation; either version > @@ -98,23 +107,72 @@ > udp_port_rover = snum = result; > } else { > struct sock *sk2; > - int addr_type = ipv6_addr_type(&sk->net_pinfo.af_inet6.rcv_saddr); > + int sk_reuse, sk2_reuse; > + int addr_type = ipv6_addr_type(&sk->net_pinfo.af_inet6.rcv_saddr), > + addr_type2; > + > + sk_reuse = 0; > + if (sk->reuse) > + sk_reuse |= 1; > + if (sk_reuse && > + (addr_type != IPV6_ADDR_MAPPED ? (addr_type & IPV6_ADDR_MULTICAST) : MULTICAST(sk->rcv_saddr))) > + sk_reuse |= 4; > > for (sk2 = udp_hash[snum & (UDP_HTABLE_SIZE - 1)]; > sk2 != NULL; > sk2 = sk2->next) { > - if (sk2->num == snum && > - sk2 != sk && > - sk2->bound_dev_if == sk->bound_dev_if && > - (!sk2->rcv_saddr || > - addr_type == IPV6_ADDR_ANY || > - !ipv6_addr_cmp(&sk->net_pinfo.af_inet6.rcv_saddr, > - &sk2->net_pinfo.af_inet6.rcv_saddr) || > - (addr_type == IPV6_ADDR_MAPPED && > - sk2->family == AF_INET && > - sk->rcv_saddr == sk2->rcv_saddr)) && > - (!sk2->reuse || !sk->reuse)) > - goto fail; > + int both_specified = 0; > + > + if (sk2->num != snum || > + sk2 == sk || > + (sk2->bound_dev_if && sk->bound_dev_if && > + sk2->bound_dev_if != sk->bound_dev_if)) > + continue; > + > + addr_type2 = sk2->family == AF_INET6 ? ipv6_addr_type(&sk2->net_pinfo.af_inet6.rcv_saddr) : IPV6_ADDR_MAPPED; > + > + if ((addr_type2 != IPV6_ADDR_MAPPED ? addr_type2 != IPV6_ADDR_ANY : sk2->rcv_saddr) && > + (addr_type != IPV6_ADDR_MAPPED ? addr_type != IPV6_ADDR_ANY : sk->rcv_saddr)) { > + if (addr_type2 == IPV6_ADDR_MAPPED || addr_type == IPV6_ADDR_MAPPED) { > + if (addr_type2 != addr_type || > + sk2->rcv_saddr != sk->rcv_saddr) > + continue; > + } else { > + if (ipv6_addr_cmp(&sk2->net_pinfo.af_inet6.rcv_saddr, > + &sk->net_pinfo.af_inet6.rcv_saddr)) > + continue; > + } > + both_specified = 1; > + } > + > + if ((addr_type2 == IPV6_ADDR_MAPPED && > + addr_type != IPV6_ADDR_MAPPED && sk->net_pinfo.af_inet6.ipv6only) || > + (addr_type == IPV6_ADDR_MAPPED && > + addr_type2 != IPV6_ADDR_MAPPED && sk2->net_pinfo.af_inet6.ipv6only)) { > + continue; > + } > + > + sk2_reuse = 0; > + if (sk2->reuse) > + sk2_reuse |= 1; > + if (sk2_reuse && > + (addr_type2 != IPV6_ADDR_MAPPED ? (addr_type2 & IPV6_ADDR_MULTICAST) : MULTICAST(sk2->rcv_saddr))) > + sk2_reuse |= 4; > + > + if (sk2_reuse & sk_reuse & 3) { /* NOT && */ > + if (sk2_reuse & sk_reuse & 4) > + continue; > + if (both_specified) { > + int addr_type2d = sk2->family == AF_INET6 ? ipv6_addr_type(&sk2->net_pinfo.af_inet6.daddr) : IPV6_ADDR_MAPPED; > + if (addr_type2d != IPV6_ADDR_MAPPED ? addr_type2d != IPV6_ADDR_ANY : sk2->daddr) > + continue; > + } else { > + if ((addr_type2 != IPV6_ADDR_MAPPED ? addr_type2 != IPV6_ADDR_ANY : sk2->rcv_saddr) || > + (addr_type != IPV6_ADDR_MAPPED ? addr_type != IPV6_ADDR_ANY : sk->rcv_saddr)) > + continue; > + } > + } > + goto fail; > } > } > > @@ -221,6 +279,8 @@ > int err; > > if (usin->sin6_family == AF_INET) { > + if (sk->net_pinfo.af_inet6.ipv6only) > + return -EAFNOSUPPORT; > err = udp_connect(sk, uaddr, addr_len); > goto ipv4_connected; > } > @@ -256,6 +316,9 @@ > if (addr_type == IPV6_ADDR_MAPPED) { > struct sockaddr_in sin; > > + if (sk->net_pinfo.af_inet6.ipv6only) > + return -ENETUNREACH; > + > sin.sin_family = AF_INET; > sin.sin_addr.s_addr = daddr->s6_addr32[3]; > sin.sin_port = usin->sin6_port; > @@ -783,8 +846,11 @@ > fl.oif = 0; > > if (sin6) { > - if (sin6->sin6_family == AF_INET) > + if (sin6->sin6_family == AF_INET) { > + if (sk->net_pinfo.af_inet6.ipv6only) > + return -EAFNOSUPPORT; > return udp_sendmsg(sk, msg, ulen); > + } > > if (addr_len < SIN6_LEN_RFC2133) > return -EINVAL; > @@ -830,6 +896,9 @@ > > if (addr_type == IPV6_ADDR_MAPPED) { > struct sockaddr_in sin; > + > + if (sk->net_pinfo.af_inet6.ipv6only) > + return -ENETUNREACH; > > sin.sin_family = AF_INET; > sin.sin_addr.s_addr = daddr->s6_addr32[3]; > > -- Pekka Savola "Tell me of difficulties surmounted, Netcore Oy not those you stumble over and fall" Systems. Networks. Security. -- Robert Jordan: A Crown of Swords - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/