From nobody Sat Sep 21 03:10:33 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1613680262914415.0372921491113; Thu, 18 Feb 2021 12:31:02 -0800 (PST) Received: from localhost ([::1]:46662 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lCpwz-0002Wi-G6 for importer@patchew.org; Thu, 18 Feb 2021 15:31:01 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:46402) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <3-8ouYAMKClQz502AA270.yA8C08G-z0H079A929G.AD2@flex--dje.bounces.google.com>) id 1lCpia-0005Wu-Pz for qemu-devel@nongnu.org; Thu, 18 Feb 2021 15:16:08 -0500 Received: from mail-pg1-x549.google.com ([2607:f8b0:4864:20::549]:56840) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from <3-8ouYAMKClQz502AA270.yA8C08G-z0H079A929G.AD2@flex--dje.bounces.google.com>) id 1lCpiW-0000MH-Fk for qemu-devel@nongnu.org; Thu, 18 Feb 2021 15:16:08 -0500 Received: by mail-pg1-x549.google.com with SMTP id v16so1887481pgl.23 for ; Thu, 18 Feb 2021 12:15:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=SNmCVV9YeJbGR714hAl1IWGl9Ws3fdkgHjDDepNCxLo=; b=s+zWs6jOjrQG83C0Ek3AWFJEJhL/TuVBKsoW0i8wLdambbgZWksPqNHnukZEFcLB2c Rw534787flMhbyvhDBWJa4xKNvjfo5PEE/FHrQnqfo1fHInISnEF3gFmAC/djDaa1KTC 80W+HlBw2d+Ahsm0+nugbibxPt898ABc15Yc1Q+9mZpEJ9uKdzXtrdKQhFM4QHhmkG2S irFS4QTq1Vj7HTkTG+FW06ly4Yrhy6OeGKkuRODAxJN7dx+y1coLo1NmYYms3azct27+ LYGZjV/I2UeUF6LQ/SomH9WSMHqJjTFOfzXnUDhPKIRQCToFFHxQorO8TQ425M2BxmFE peLQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=SNmCVV9YeJbGR714hAl1IWGl9Ws3fdkgHjDDepNCxLo=; b=YUOFJtRKCQUAKzGTpBUs5eF46VwKWa8PISZUfNx6aNragebi7hycUAtVIBbnzsr0HT lhwy9EIRtBZr/FtTFlUHdbNxQ3Zu8UgD/LHplCpNtuoiihEQ7XfU/jEdfe3AEuh4awdV IgZRs3twdNQ5N0hq0enu5MqPav2BOwbQ6mCGCRJzYmpPQx08WenIrMcMP52cD8bfbQX5 kO6Zg25cUBfxP7iu2xQ4ynUXm0hJdKtXBxmnVR3jXStHl+CuC2yP9D6uHRGFS8lErF/k JTMiyq56379IQ3QlXNyu+eSMOOMezaodnXam5aMgPrMUdqKOheqlKK6GM8F3d/DObfU8 +vaw== X-Gm-Message-State: AOAM533s0ZNdpKEShEFRjUNBIPJIIZlMMNJ2XmtAX+8P2E4ewioUwJ12 4Jqx3LHa9jrnM+lMFmwWDqgeLp57vYTEtttqX9m7LlTyXE0cqkKo4pWbigehkrL5FossHEEw99+ YD5SBy2rsttm3pW0CCfHhUwDOmMEU9d2UB16SYg8gVM4myUbbmV0C X-Google-Smtp-Source: ABdhPJyJOkM9FDmcN5hUr/O68oMS0OMPEjaBaHIhSBz2ugVV9nBqPmL6h9uQ6vGyTfGToZ+wM2vNwBk= X-Received: from ruffy.mtv.corp.google.com ([2620:0:1000:1412:4cc1:c5e:b49d:b16f]) (user=dje job=sendgmr) by 2002:a17:90a:5303:: with SMTP id x3mr5642354pjh.54.1613679355186; Thu, 18 Feb 2021 12:15:55 -0800 (PST) Date: Thu, 18 Feb 2021 12:15:38 -0800 In-Reply-To: <20210218201538.701509-1-dje@google.com> Message-Id: <20210218201538.701509-5-dje@google.com> Mime-Version: 1.0 References: <20210218201538.701509-1-dje@google.com> X-Mailer: git-send-email 2.30.0.617.g56c4b15f3c-goog Subject: [PATCH v4 4/4] net: Extend host forwarding to support IPv6 To: qemu-devel@nongnu.org Cc: Samuel Thibault , "=?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?=" , Doug Evans Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::549; envelope-from=3-8ouYAMKClQz502AA270.yA8C08G-z0H079A929G.AD2@flex--dje.bounces.google.com; helo=mail-pg1-x549.google.com X-Spam_score_int: -95 X-Spam_score: -9.6 X-Spam_bar: --------- X-Spam_report: (-9.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, USER_IN_DEF_DKIM_WL=-7.5 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Reply-to: Doug Evans From: Doug Evans via X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Net option "-hostfwd" now supports IPv6 addresses. Commands hostfwd_add, hostfwd_remove now support IPv6 addresses. Signed-off-by: Doug Evans --- Differences from v3: - this patch renamed from 3/3 to 4/4 - ipv6 support added to existing hostfwd option, commands - instead of creating new ipv6 option, commands - added tests to tests/acceptance/hostfwd.py Differences from v2: - clarify spelling of ipv6 addresses in docs - tighten parsing of ipv6 addresses Differences from v1: - parsing refactor split out into separate patch (2/3) hmp-commands.hx | 15 +++++++ net/slirp.c | 78 ++++++++++++++++++++++++++----------- tests/acceptance/hostfwd.py | 66 +++++++++++++++++++++++++++++++ 3 files changed, 136 insertions(+), 23 deletions(-) diff --git a/hmp-commands.hx b/hmp-commands.hx index d4001f9c5d..4de4e4979d 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -1375,6 +1375,16 @@ ERST SRST ``hostfwd_add`` Redirect TCP or UDP connections from host to guest (requires -net user). + IPV6 addresses are wrapped in square brackes, IPV4 addresses are not. + + Examples: + hostfwd_add net0 tcp:127.0.0.1:10022-:22 + hostfwd_add net0 tcp:[::1]:10022-[fe80::1:2:3:4]:22 + + Note that Libslirp currently only provides a "stateless" DHCPv6 server, a + consequence of which is that it cannot do the "addr-any" translation to = the + guest address that is done for IPv4. In other words, the following is + currently not supported: hostfwd_add net0 tcp:[::1]:10022-:22 ERST =20 #ifdef CONFIG_SLIRP @@ -1390,6 +1400,11 @@ ERST SRST ``hostfwd_remove`` Remove host-to-guest TCP or UDP redirection. + IPV6 addresses are wrapped in square brackes, IPV4 addresses are not. + + Examples: + hostfwd_remove net0 tcp:127.0.0.1:10022 + hostfwd_remove net0 tcp:[::1]:10022 ERST =20 { diff --git a/net/slirp.c b/net/slirp.c index ee39014a71..d8c675a2e8 100644 --- a/net/slirp.c +++ b/net/slirp.c @@ -96,6 +96,11 @@ typedef struct SlirpState { GSList *fwd; } SlirpState; =20 +union in4or6_addr { + struct in_addr addr4; + struct in6_addr addr6; +}; + static struct slirp_config_str *slirp_configs; static QTAILQ_HEAD(, SlirpState) slirp_stacks =3D QTAILQ_HEAD_INITIALIZER(slirp_stacks); @@ -663,31 +668,38 @@ static const char *parse_protocol(const char *str, in= t sep, bool *is_udp, =20 /* * Parse an ip address/port of the form "address:port". - * An empty address means INADDR_ANY. - * Returns a pointer to the end of the parsed string on success, and stores - * the results in *addr, *port. + * An empty address means INADDR_ANY/in6addr_any. + * Returns a pointer to after the terminator, unless it was '\0', and stor= es + * the results in *addr, *port, *is_v6. * Otherwise returns NULL and stores the error in *errp. */ static const char *parse_ip_addr_and_port(const char *str, int terminator, - struct in_addr *addr, int *port, - Error **errp) + union in4or6_addr *addr, int *po= rt, + bool *is_v6, Error **errp) { g_autofree char *addr_str =3D NULL; g_autofree char *port_str =3D NULL; - bool is_v6; const char *p =3D inet_parse_host_and_port(str, terminator, &addr_str, - &port_str, &is_v6, errp); + &port_str, is_v6, errp); =20 if (p =3D=3D NULL) { return NULL; } =20 - /* Ignore is_v6 for the moment, if inet_aton fails let it. */ - if (addr_str[0] =3D=3D '\0') { - addr->s_addr =3D INADDR_ANY; - } else if (!inet_aton(addr_str, addr)) { - error_setg(errp, "Bad address"); - return NULL; + if (*is_v6) { + if (addr_str[0] =3D=3D '\0') { + addr->addr6 =3D in6addr_any; + } else if (!inet_pton(AF_INET6, addr_str, &addr->addr6)) { + error_setg(errp, "Bad address"); + return NULL; + } + } else { + if (addr_str[0] =3D=3D '\0') { + addr->addr4.s_addr =3D INADDR_ANY; + } else if (!inet_pton(AF_INET, addr_str, &addr->addr4)) { + error_setg(errp, "Bad address"); + return NULL; + } } =20 if (qemu_strtoi(port_str, NULL, 10, port) < 0 || @@ -708,11 +720,11 @@ static const char *parse_ip_addr_and_port(const char = *str, int terminator, =20 void hmp_hostfwd_remove(Monitor *mon, const QDict *qdict) { - struct in_addr host_addr; + union in4or6_addr host_addr; int host_port; const char *src_str, *p; SlirpState *s; - bool is_udp; + bool is_udp, is_v6; int err; Error *error =3D NULL; const char *arg1 =3D qdict_get_str(qdict, "arg1"); @@ -737,11 +749,18 @@ void hmp_hostfwd_remove(Monitor *mon, const QDict *qd= ict) goto fail_syntax; } =20 - if (parse_ip_addr_and_port(p, '\0', &host_addr, &host_port, + if (parse_ip_addr_and_port(p, '\0', &host_addr, &host_port, &is_v6, &error) =3D=3D NULL) { goto fail_syntax; } - err =3D slirp_remove_hostfwd(s->slirp, is_udp, host_addr, host_port); + + if (is_v6) { + err =3D slirp_remove_ipv6_hostfwd(s->slirp, is_udp, host_addr.addr= 6, + host_port); + } else { + err =3D slirp_remove_hostfwd(s->slirp, is_udp, host_addr.addr4, + host_port); + } =20 monitor_printf(mon, "host forwarding rule for %s %s\n", src_str, err ? "not found" : "removed"); @@ -754,11 +773,12 @@ void hmp_hostfwd_remove(Monitor *mon, const QDict *qd= ict) =20 static int slirp_hostfwd(SlirpState *s, const char *redir_str, Error **err= p) { - struct in_addr host_addr, guest_addr; + union in4or6_addr host_addr, guest_addr; int host_port, guest_port; const char *p; - bool is_udp; + bool is_udp, host_is_v6, guest_is_v6; Error *error =3D NULL; + int err; =20 g_assert(redir_str !=3D NULL); p =3D redir_str; @@ -768,24 +788,36 @@ static int slirp_hostfwd(SlirpState *s, const char *r= edir_str, Error **errp) goto fail_syntax; } =20 - p =3D parse_ip_addr_and_port(p, '-', &host_addr, &host_port, &error); + p =3D parse_ip_addr_and_port(p, '-', &host_addr, &host_port, &host_is_= v6, + &error); if (p =3D=3D NULL) { error_prepend(&error, "For host address: "); goto fail_syntax; } =20 - if (parse_ip_addr_and_port(p, '\0', &guest_addr, &guest_port, + if (parse_ip_addr_and_port(p, '\0', &guest_addr, &guest_port, &guest_i= s_v6, &error) =3D=3D NULL) { error_prepend(&error, "For guest address: "); goto fail_syntax; } + if (host_is_v6 !=3D guest_is_v6) { + /* TODO: Can libslirp support this? */ + error_setg(&error, "Both host,guest must be one of ipv4 or ipv6"); + goto fail_syntax; + } if (guest_port =3D=3D 0) { error_setg(&error, "For guest address: Bad port"); goto fail_syntax; } =20 - if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_ad= dr, - guest_port) < 0) { + if (host_is_v6) { + err =3D slirp_add_ipv6_hostfwd(s->slirp, is_udp, host_addr.addr6, + host_port, guest_addr.addr6, guest_po= rt); + } else { + err =3D slirp_add_hostfwd(s->slirp, is_udp, host_addr.addr4, host_= port, + guest_addr.addr4, guest_port); + } + if (err < 0) { error_setg(errp, "Could not set up host forwarding rule '%s'", redir_str); return -1; diff --git a/tests/acceptance/hostfwd.py b/tests/acceptance/hostfwd.py index 1eaa0371ba..4368d557c9 100644 --- a/tests/acceptance/hostfwd.py +++ b/tests/acceptance/hostfwd.py @@ -82,3 +82,69 @@ def test_qmp_hostfwd_ipv4_parsing_errors(self): "Invalid host forwarding rule '::66-:-1' (For gu= est address: Bad port)\r\n") self.assertEquals(self.hmc('hostfwd_add ::66-:0'), "Invalid host forwarding rule '::66-:0' (For gue= st address: Bad port)\r\n") + + def test_qmp_hostfwd_ipv6(self): + self.vm.add_args('-nodefaults', + '-netdev', 'user,id=3Dvnet', + '-device', 'virtio-net,netdev=3Dvnet') + self.vm.launch() + self.assertEquals(self.hmc('hostfwd_add vnet tcp:[::1]:65022-[fe80= ::1]:22'), + '') + self.assertEquals(self.hmc('hostfwd_remove vnet tcp:[::1]:65022'), + 'host forwarding rule for tcp:[::1]:65022 remove= d\r\n') + self.assertEquals(self.hmc('hostfwd_add tcp:[]:65042-[fe80::1]:42'= ), + '') + self.assertEquals(self.hmc('hostfwd_remove tcp:[]:65042'), + 'host forwarding rule for tcp:[]:65042 removed\r= \n') + self.assertEquals(self.hmc('hostfwd_add udp:[::1]:65042-[fe80::1]:= 42'), + '') + self.assertEquals(self.hmc('hostfwd_remove udp:[::1]:65042'), + 'host forwarding rule for udp:[::1]:65042 remove= d\r\n') + + def test_qmp_hostfwd_ipv6_functional_errors(self): + """Verify handling of various kinds of errors given valid addresse= s.""" + self.vm.add_args('-nodefaults', + '-netdev', 'user,id=3Dvnet', + '-device', 'virtio-net,netdev=3Dvnet') + self.vm.launch() + self.assertEquals(self.hmc('hostfwd_remove :[::1]:65022'), + 'host forwarding rule for :[::1]:65022 not found= \r\n') + self.assertEquals(self.hmc('hostfwd_add udp:[::1]:65042-[fe80::1]:= 42'), + '') + self.assertEquals(self.hmc('hostfwd_add udp:[::1]:65042-[fe80::1]:= 42'), + "Could not set up host forwarding rule 'udp:[::1= ]:65042-[fe80::1]:42'\r\n") + self.assertEquals(self.hmc('hostfwd_remove :[::1]:65042'), + 'host forwarding rule for :[::1]:65042 not found= \r\n') + self.assertEquals(self.hmc('hostfwd_remove udp:[::1]:65042'), + 'host forwarding rule for udp:[::1]:65042 remove= d\r\n') + self.assertEquals(self.hmc('hostfwd_remove udp:[::1]:65042'), + 'host forwarding rule for udp:[::1]:65042 not fo= und\r\n') + + def test_qmp_hostfwd_ipv6_errors(self): + """Verify handling of various kinds of errors.""" + self.vm.add_args('-nodefaults', + '-netdev', 'user,id=3Dvnet', + '-device', 'virtio-net,netdev=3Dvnet') + self.vm.launch() + self.assertEquals(self.hmc('hostfwd_add :[::1-'), + "Invalid host forwarding rule ':[::1-' (For host= address: error parsing IPv6 host:port '[::1')\r\n") + self.assertEquals(self.hmc('hostfwd_add :[::1]:66-[fe80::1'), + "Invalid host forwarding rule ':[::1]:66-[fe80::= 1' (For guest address: error parsing IPv6 host:port '[fe80::1')\r\n") + self.assertEquals(self.hmc('hostfwd_add :[:::]:66-foo'), + "Invalid host forwarding rule ':[:::]:66-foo' (F= or host address: Bad address)\r\n") + self.assertEquals(self.hmc('hostfwd_add :[::1]-foo'), + "Invalid host forwarding rule ':[::1]-foo' (For = host address: error parsing IPv6 host:port '[::1]')\r\n") + self.assertEquals(self.hmc('hostfwd_add :[::1]:66-[foo]'), + "Invalid host forwarding rule ':[::1]:66-[foo]' = (For guest address: error parsing IPv6 host:port '[foo]')\r\n") + self.assertEquals(self.hmc('hostfwd_add :[::1]:66666-foo'), + "Invalid host forwarding rule ':[::1]:66666-foo'= (For host address: Bad port)\r\n") + self.assertEquals(self.hmc('hostfwd_add :[::1]:66-[fe80::1]:-1'), + "Invalid host forwarding rule ':[::1]:66-[fe80::= 1]:-1' (For guest address: Bad port)\r\n") + self.assertEquals(self.hmc('hostfwd_add :[::1]:66-[fe80::1]:66666'= ), + "Invalid host forwarding rule ':[::1]:66-[fe80::= 1]:66666' (For guest address: Bad port)\r\n") + self.assertEquals(self.hmc('hostfwd_add :[::1]:66-[fe80::1]:0'), + "Invalid host forwarding rule ':[::1]:66-[fe80::= 1]:0' (For guest address: Bad port)\r\n") + self.assertEquals(self.hmc('hostfwd_add :[::1]:66-1.2.3.4:66'), + "Invalid host forwarding rule ':[::1]:66-1.2.3.4= :66' (Both host,guest must be one of ipv4 or ipv6)\r\n") + self.assertEquals(self.hmc('hostfwd_add :1.2.3.4:66-[fe80::1]:66'), + "Invalid host forwarding rule ':1.2.3.4:66-[fe80= ::1]:66' (Both host,guest must be one of ipv4 or ipv6)\r\n") --=20 2.30.0.617.g56c4b15f3c-goog