From patchwork Tue Mar 15 16:11:55 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Samuel Thibault X-Patchwork-Id: 597676 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3qPfmJ6TSzz9t3t for ; Wed, 16 Mar 2016 03:13:04 +1100 (AEDT) Received: from localhost ([::1]:49790 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1afrag-0008Pt-JB for incoming@patchwork.ozlabs.org; Tue, 15 Mar 2016 12:13:02 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58543) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1afrZw-0006yA-0o for qemu-devel@nongnu.org; Tue, 15 Mar 2016 12:12:21 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1afrZu-0005Ju-3Z for qemu-devel@nongnu.org; Tue, 15 Mar 2016 12:12:15 -0400 Received: from mail2-relais-roc.national.inria.fr ([192.134.164.83]:38268) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1afrZt-0005IY-KX for qemu-devel@nongnu.org; Tue, 15 Mar 2016 12:12:14 -0400 X-IronPort-AV: E=Sophos;i="5.24,340,1454972400"; d="scan'208";a="207904141" Received: from unknown (HELO var.youpi.perso.aquilenet.fr) ([193.50.110.180]) by mail2-relais-roc.national.inria.fr with ESMTP/TLS/AES128-GCM-SHA256; 15 Mar 2016 17:12:00 +0100 Received: from samy by var.youpi.perso.aquilenet.fr with local (Exim 4.86_2) (envelope-from ) id 1afrZg-0004WP-1L; Tue, 15 Mar 2016 17:12:00 +0100 From: Samuel Thibault To: qemu-devel@nongnu.org, Peter Maydell Date: Tue, 15 Mar 2016 17:11:55 +0100 Message-Id: <7aac531ef260e3176838f8089525f3e13e40b607.1458058240.git.samuel.thibault@ens-lyon.org> X-Mailer: git-send-email 2.7.0 In-Reply-To: References: In-Reply-To: References: X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.134.164.83 Cc: Thomas Huth , zhanghailiang , Li Zhijian , Stefan Hajnoczi , Jason Wang , Dave Gilbert , Vasiliy Tolstov , Huangpeng , Yann Bordenave , Gonglei , Jan Kiszka , Samuel Thibault , Guillaume Subiron Subject: [Qemu-devel] [PULL 10/11] qapi-schema, qemu-options & slirp: Adding Qemu options for IPv6 addresses X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Yann Bordenave This patch adds parameters to manage some new options in the qemu -net command. Slirp IPv6 address, network prefix, and DNS IPv6 address can be given in argument to the qemu command. Defaults parameters are respectively fec0::2, fec0::, /64 and fec0::3. Signed-off-by: Yann Bordenave Signed-off-by: Samuel Thibault Reviewed-by: Thomas Huth --- net/net.c | 31 ++++++++++++++++++++++ net/slirp.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++----- qapi-schema.json | 12 +++++++++ qemu-options.hx | 18 +++++++++++-- slirp/libslirp.h | 8 +++--- slirp/slirp.c | 28 +++++++------------- 6 files changed, 148 insertions(+), 30 deletions(-) diff --git a/net/net.c b/net/net.c index b0c832e..73cefbc 100644 --- a/net/net.c +++ b/net/net.c @@ -1050,6 +1050,37 @@ int net_client_init(QemuOpts *opts, int is_netdev, Error **errp) OptsVisitor *ov = opts_visitor_new(opts); Visitor *v = opts_get_visitor(ov); + { + /* Parse convenience option format ip6-net=fec0::0[/64] */ + const char *ip6_net = qemu_opt_get(opts, "ip6-net"); + + if (ip6_net) { + char buf[strlen(ip6_net) + 1]; + + if (get_str_sep(buf, sizeof(buf), &ip6_net, '/') < 0) { + /* Default 64bit prefix length. */ + qemu_opt_set(opts, "ip6-prefix", ip6_net, &error_abort); + qemu_opt_set_number(opts, "ip6-prefixlen", 64, &error_abort); + } else { + /* User-specified prefix length. */ + unsigned long len; + int err; + + qemu_opt_set(opts, "ip6-prefix", buf, &error_abort); + err = qemu_strtoul(ip6_net, NULL, 10, &len); + + if (err) { + error_setg(errp, QERR_INVALID_PARAMETER_VALUE, + "ip6-prefix", "a number"); + } else { + qemu_opt_set_number(opts, "ip6-prefixlen", len, + &error_abort); + } + } + qemu_opt_unset(opts, "ip6-net"); + } + } + if (is_netdev) { visit_type_Netdev(v, NULL, (Netdev **)&object, &err); } else { diff --git a/net/slirp.c b/net/slirp.c index 6b51fbc..9954160 100644 --- a/net/slirp.c +++ b/net/slirp.c @@ -36,6 +36,7 @@ #include "qemu/error-report.h" #include "qemu/sockets.h" #include "slirp/libslirp.h" +#include "slirp/ip6.h" #include "sysemu/char.h" static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) @@ -135,10 +136,13 @@ static NetClientInfo net_slirp_info = { static int net_slirp_init(NetClientState *peer, const char *model, const char *name, int restricted, const char *vnetwork, const char *vhost, + const char *vprefix6, int vprefix6_len, + const char *vhost6, const char *vhostname, const char *tftp_export, const char *bootfile, const char *vdhcp_start, - const char *vnameserver, const char *smb_export, - const char *vsmbserver, const char **dnssearch) + const char *vnameserver, const char *vnameserver6, + const char *smb_export, const char *vsmbserver, + const char **dnssearch) { /* default settings according to historic slirp */ struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */ @@ -146,6 +150,9 @@ static int net_slirp_init(NetClientState *peer, const char *model, struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */ struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */ struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */ + struct in6_addr ip6_prefix; + struct in6_addr ip6_host; + struct in6_addr ip6_dns; #ifndef _WIN32 struct in_addr smbsrv = { .s_addr = 0 }; #endif @@ -235,6 +242,64 @@ static int net_slirp_init(NetClientState *peer, const char *model, } #endif +#if defined(_WIN32) && (_WIN32_WINNT < 0x0600) + /* No inet_pton helper before Vista... */ + if (vprefix6) { + /* Unsupported */ + return -1; + } + memset(&ip6_prefix, 0, sizeof(ip6_prefix)); + ip6_prefix.s6_addr[0] = 0xfe; + ip6_prefix.s6_addr[1] = 0xc0; +#else + if (!vprefix6) { + vprefix6 = "fec0::"; + } + if (!inet_pton(AF_INET6, vprefix6, &ip6_prefix)) { + return -1; + } +#endif + + if (!vprefix6_len) { + vprefix6_len = 64; + } + if (vprefix6_len < 0 || vprefix6_len > 126) { + return -1; + } + + if (vhost6) { +#if defined(_WIN32) && (_WIN32_WINNT < 0x0600) + return -1; +#else + if (!inet_pton(AF_INET6, vhost6, &ip6_host)) { + return -1; + } + if (!in6_equal_net(&ip6_prefix, &ip6_host, vprefix6_len)) { + return -1; + } +#endif + } else { + ip6_host = ip6_prefix; + ip6_host.s6_addr[15] |= 2; + } + + if (vnameserver6) { +#if defined(_WIN32) && (_WIN32_WINNT < 0x0600) + return -1; +#else + if (!inet_pton(AF_INET6, vnameserver6, &ip6_dns)) { + return -1; + } + if (!in6_equal_net(&ip6_prefix, &ip6_dns, vprefix6_len)) { + return -1; + } +#endif + } else { + ip6_dns = ip6_prefix; + ip6_dns.s6_addr[15] |= 3; + } + + nc = qemu_new_net_client(&net_slirp_info, peer, model, name); snprintf(nc->info_str, sizeof(nc->info_str), @@ -243,8 +308,10 @@ static int net_slirp_init(NetClientState *peer, const char *model, s = DO_UPCAST(SlirpState, nc, nc); - s->slirp = slirp_init(restricted, net, mask, host, vhostname, - tftp_export, bootfile, dhcp, dns, dnssearch, s); + s->slirp = slirp_init(restricted, net, mask, host, + ip6_prefix, vprefix6_len, ip6_host, + vhostname, tftp_export, bootfile, dhcp, + dns, ip6_dns, dnssearch, s); QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry); for (config = slirp_configs; config; config = config->next) { @@ -761,8 +828,10 @@ int net_init_slirp(const NetClientOptions *opts, const char *name, net_init_slirp_configs(user->guestfwd, 0); ret = net_slirp_init(peer, "user", name, user->q_restrict, vnet, - user->host, user->hostname, user->tftp, - user->bootfile, user->dhcpstart, user->dns, user->smb, + user->host, user->ip6_prefix, user->ip6_prefixlen, + user->ip6_host, user->hostname, user->tftp, + user->bootfile, user->dhcpstart, + user->dns, user->ip6_dns, user->smb, user->smbserver, dnssearch); while (slirp_configs) { diff --git a/qapi-schema.json b/qapi-schema.json index 6269c37..f253a37 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -2451,6 +2451,14 @@ # @dnssearch: #optional list of DNS suffixes to search, passed as DHCP option # to the guest # +# @ip6-prefix: #optional IPv6 network prefix (default is fec0::) (since 2.6) +# +# @ip6-prefixlen: #optional IPv6 network prefix length (default is 64) (since 2.6) +# +# @ip6-host: #optional guest-visible IPv6 address of the host (since 2.6) +# +# @ip6-dns: #optional guest-visible IPv6 address of the virtual nameserver (since 2.6) +# # @smb: #optional root directory of the built-in SMB server # # @smbserver: #optional IP address of the built-in SMB server @@ -2474,6 +2482,10 @@ '*dhcpstart': 'str', '*dns': 'str', '*dnssearch': ['String'], + '*ip6-prefix': 'str', + '*ip6-prefixlen': 'int', + '*ip6-host': 'str', + '*ip6-dns': 'str', '*smb': 'str', '*smbserver': 'str', '*hostfwd': ['String'], diff --git a/qemu-options.hx b/qemu-options.hx index 0cf7bb9..732ed8c 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -1560,8 +1560,9 @@ DEF("smb", HAS_ARG, QEMU_OPTION_smb, "", QEMU_ARCH_ALL) DEF("netdev", HAS_ARG, QEMU_OPTION_netdev, #ifdef CONFIG_SLIRP - "-netdev user,id=str[,net=addr[/mask]][,host=addr][,restrict=on|off]\n" - " [,hostname=host][,dhcpstart=addr][,dns=addr][,dnssearch=domain][,tftp=dir]\n" + "-netdev user,id=str[,net=addr[/mask]][,host=addr][,ip6-net=addr[/int]]\n" + " [,ip6-host=addr][,restrict=on|off][,hostname=host][,dhcpstart=addr]\n" + " [,dns=addr][,ip6-dns=addr][,dnssearch=domain][,tftp=dir]\n" " [,bootfile=f][,hostfwd=rule][,guestfwd=rule]" #ifndef _WIN32 "[,smb=dir[,smbserver=addr]]\n" @@ -1718,6 +1719,14 @@ either in the form a.b.c.d or as number of valid top-most bits. Default is Specify the guest-visible address of the host. Default is the 2nd IP in the guest network, i.e. x.x.x.2. +@item ip6-net=@var{addr}[/@var{int}] +Set IPv6 network address the guest will see. Optionally specify the prefix +size, as number of valid top-most bits. Default is fec0::/64. + +@item ip6-host=@var{addr} +Specify the guest-visible IPv6 address of the host. Default is the 2nd IPv6 in +the guest network, i.e. xxxx::2. + @item restrict=on|off If this option is enabled, the guest will be isolated, i.e. it will not be able to contact the host and no guest IP packets will be routed over the host @@ -1735,6 +1744,11 @@ Specify the guest-visible address of the virtual nameserver. The address must be different from the host address. Default is the 3rd IP in the guest network, i.e. x.x.x.3. +@item ip6-dns=@var{addr} +Specify the guest-visible address of the IPv6 virtual nameserver. The address +must be different from the host address. Default is the 3rd IP in the guest +network, i.e. xxxx::3. + @item dnssearch=@var{domain} Provides an entry for the domain-search list sent by the built-in DHCP server. More than one domain suffix can be transmitted by specifying diff --git a/slirp/libslirp.h b/slirp/libslirp.h index 5bdcbd5..c4b25c9 100644 --- a/slirp/libslirp.h +++ b/slirp/libslirp.h @@ -10,9 +10,11 @@ int get_dns_addr(struct in_addr *pdns_addr); Slirp *slirp_init(int restricted, struct in_addr vnetwork, struct in_addr vnetmask, struct in_addr vhost, - const char *vhostname, const char *tftp_path, - const char *bootfile, struct in_addr vdhcp_start, - struct in_addr vnameserver, const char **vdnssearch, + struct in6_addr vprefix_addr6, uint8_t vprefix_len, + struct in6_addr vhost6, const char *vhostname, + const char *tftp_path, const char *bootfile, + struct in_addr vdhcp_start, struct in_addr vnameserver, + struct in6_addr vnameserver6, const char **vdnssearch, void *opaque); void slirp_cleanup(Slirp *slirp); diff --git a/slirp/slirp.c b/slirp/slirp.c index 7a47bb6..9ccf415 100644 --- a/slirp/slirp.c +++ b/slirp/slirp.c @@ -201,9 +201,11 @@ static int slirp_state_load(QEMUFile *f, void *opaque, int version_id); Slirp *slirp_init(int restricted, struct in_addr vnetwork, struct in_addr vnetmask, struct in_addr vhost, - const char *vhostname, const char *tftp_path, - const char *bootfile, struct in_addr vdhcp_start, - struct in_addr vnameserver, const char **vdnssearch, + struct in6_addr vprefix_addr6, uint8_t vprefix_len, + struct in6_addr vhost6, const char *vhostname, + const char *tftp_path, const char *bootfile, + struct in_addr vdhcp_start, struct in_addr vnameserver, + struct in6_addr vnameserver6, const char **vdnssearch, void *opaque) { Slirp *slirp = g_malloc0(sizeof(Slirp)); @@ -223,22 +225,9 @@ Slirp *slirp_init(int restricted, struct in_addr vnetwork, slirp->vnetwork_addr = vnetwork; slirp->vnetwork_mask = vnetmask; slirp->vhost_addr = vhost; -#if defined(_WIN32) && (_WIN32_WINNT < 0x0600) - /* No inet_pton helper... */ - memset(&slirp->vprefix_addr6, 0, sizeof(slirp->vprefix_addr6)); - slirp->vprefix_addr6.s6_addr[0] = 0xfe; - slirp->vprefix_addr6.s6_addr[1] = 0xc0; - slirp->vprefix_len = 64; - slirp->vhost_addr6 = slirp->vprefix_addr6; - slirp->vhost_addr6.s6_addr[15] = 0x2; - slirp->vnameserver_addr6 = slirp->vprefix_addr6; - slirp->vnameserver_addr6.s6_addr[15] = 0x3; -#else - inet_pton(AF_INET6, "fec0::0", &slirp->vprefix_addr6); - slirp->vprefix_len = 64; - inet_pton(AF_INET6, "fec0::2", &slirp->vhost_addr6); - inet_pton(AF_INET6, "fec0::3", &slirp->vnameserver_addr6); -#endif + slirp->vprefix_addr6 = vprefix_addr6; + slirp->vprefix_len = vprefix_len; + slirp->vhost_addr6 = vhost6; if (vhostname) { pstrcpy(slirp->client_hostname, sizeof(slirp->client_hostname), vhostname); @@ -247,6 +236,7 @@ Slirp *slirp_init(int restricted, struct in_addr vnetwork, slirp->bootp_filename = g_strdup(bootfile); slirp->vdhcp_startaddr = vdhcp_start; slirp->vnameserver_addr = vnameserver; + slirp->vnameserver_addr6 = vnameserver6; if (vdnssearch) { translate_dnssearch(slirp, vdnssearch);