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bh=7/R3XMy4d111ISt9N7aac4zN8XErVUnJxv3oY2OqsA0=; b=fQlJ6D1HZeemP5uX5onAx2CP1C0vOHq2hQ3LqqwcD+HY/z8w6IPaV6rAR47Xv1ge0n578l 7C0fukKWglGfBKNIDRn5pJejDWiyQ7csOrUqCGnrkiqerseFBD4fD9a92WV5SVHE/094Hu iZETV9WolMUNtscOCIAjrWHkXfdrxH4= X-MC-Unique: wsLJ3c02OpK8jIHxwNIv0A-1 From: Laurent Vivier To: qemu-devel@nongnu.org Cc: Eric Blake , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Markus Armbruster , Paolo Bonzini , Jason Wang , "Dr. David Alan Gilbert" , Laurent Vivier , Stefano Brivio Subject: [PATCH v5 07/12] net: stream: add unix socket Date: Mon, 27 Jun 2022 17:47:44 +0200 Message-Id: <20220627154749.871943-8-lvivier@redhat.com> In-Reply-To: <20220627154749.871943-1-lvivier@redhat.com> References: <20220627154749.871943-1-lvivier@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 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=170.10.133.124; envelope-from=lvivier@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, 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, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 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" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1656346947625100003 Content-Type: text/plain; charset="utf-8" Signed-off-by: Laurent Vivier Reviewed-by: Stefano Brivio --- net/stream.c | 106 +++++++++++++++++++++++++++++++++++++++++++++--- qemu-options.hx | 1 + 2 files changed, 102 insertions(+), 5 deletions(-) diff --git a/net/stream.c b/net/stream.c index e8afbaca50b6..1a2bc237707e 100644 --- a/net/stream.c +++ b/net/stream.c @@ -235,7 +235,7 @@ static NetStreamState *net_stream_fd_init_stream(NetCli= entState *peer, static void net_stream_accept(void *opaque) { NetStreamState *s =3D opaque; - struct sockaddr_in saddr; + struct sockaddr_storage saddr; socklen_t len; int fd; =20 @@ -253,9 +253,27 @@ static void net_stream_accept(void *opaque) s->fd =3D fd; s->nc.link_down =3D false; net_stream_connect(s); - snprintf(s->nc.info_str, sizeof(s->nc.info_str), - "connection from %s:%d", - inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); + switch (saddr.ss_family) { + case AF_INET: { + struct sockaddr_in *saddr_in =3D (struct sockaddr_in *)&saddr; + + snprintf(s->nc.info_str, sizeof(s->nc.info_str), + "connection from %s:%d", + inet_ntoa(saddr_in->sin_addr), ntohs(saddr_in->sin_port)); + break; + } + case AF_UNIX: { + struct sockaddr_un saddr_un; + + len =3D sizeof(saddr_un); + getsockname(s->listen_fd, (struct sockaddr *)&saddr_un, &len); + snprintf(s->nc.info_str, sizeof(s->nc.info_str), + "connect from %s", saddr_un.sun_path); + break; + } + default: + g_assert_not_reached(); + } } =20 static int net_stream_server_init(NetClientState *peer, @@ -295,6 +313,42 @@ static int net_stream_server_init(NetClientState *peer, } break; } + case SOCKET_ADDRESS_TYPE_UNIX: { + struct sockaddr_un saddr_un; + + ret =3D unlink(addr->u.q_unix.path); + if (ret < 0 && errno !=3D ENOENT) { + error_setg_errno(errp, errno, "failed to unlink socket %s", + addr->u.q_unix.path); + return -1; + } + + saddr_un.sun_family =3D PF_UNIX; + ret =3D snprintf(saddr_un.sun_path, sizeof(saddr_un.sun_path), "%s= ", + addr->u.q_unix.path); + if (ret < 0 || ret >=3D sizeof(saddr_un.sun_path)) { + error_setg(errp, "UNIX socket path '%s' is too long", + addr->u.q_unix.path); + error_append_hint(errp, "Path must be less than %zu bytes\n", + sizeof(saddr_un.sun_path)); + } + + fd =3D qemu_socket(PF_UNIX, SOCK_STREAM, 0); + if (fd < 0) { + error_setg_errno(errp, errno, "can't create stream socket"); + return -1; + } + qemu_socket_set_nonblock(fd); + + ret =3D bind(fd, (struct sockaddr *)&saddr_un, sizeof(saddr_un)); + if (ret < 0) { + error_setg_errno(errp, errno, "can't create socket with path: = %s", + saddr_un.sun_path); + closesocket(fd); + return -1; + } + break; + } case SOCKET_ADDRESS_TYPE_FD: fd =3D monitor_fd_param(monitor_cur(), addr->u.fd.str, errp); if (fd =3D=3D -1) { @@ -380,6 +434,48 @@ static int net_stream_client_init(NetClientState *peer, ntohs(saddr_in.sin_port)); break; } + case SOCKET_ADDRESS_TYPE_UNIX: { + struct sockaddr_un saddr_un; + + saddr_un.sun_family =3D PF_UNIX; + ret =3D snprintf(saddr_un.sun_path, sizeof(saddr_un.sun_path), "%s= ", + addr->u.q_unix.path); + if (ret < 0 || ret >=3D sizeof(saddr_un.sun_path)) { + error_setg(errp, "UNIX socket path '%s' is too long", + addr->u.q_unix.path); + error_append_hint(errp, "Path must be less than %zu bytes\n", + sizeof(saddr_un.sun_path)); + } + + fd =3D qemu_socket(PF_UNIX, SOCK_STREAM, 0); + if (fd < 0) { + error_setg_errno(errp, errno, "can't create stream socket"); + return -1; + } + qemu_socket_set_nonblock(fd); + + connected =3D 0; + for (;;) { + ret =3D connect(fd, (struct sockaddr *)&saddr_un, sizeof(saddr= _un)); + if (ret < 0) { + if (errno =3D=3D EINTR || errno =3D=3D EWOULDBLOCK) { + /* continue */ + } else if (errno =3D=3D EAGAIN || + errno =3D=3D EALREADY) { + break; + } else { + error_setg_errno(errp, errno, "can't connect socket"); + closesocket(fd); + return -1; + } + } else { + connected =3D 1; + break; + } + } + info_str =3D g_strdup_printf(" connect to %s", saddr_un.sun_path); + break; + } case SOCKET_ADDRESS_TYPE_FD: fd =3D monitor_fd_param(monitor_cur(), addr->u.fd.str, errp); if (fd =3D=3D -1) { @@ -395,7 +491,7 @@ static int net_stream_client_init(NetClientState *peer, info_str =3D g_strdup_printf("connect to fd %d", fd); break; default: - error_setg(errp, "only support inet or fd type"); + error_setg(errp, "only support inet, unix or fd type"); return -1; } =20 diff --git a/qemu-options.hx b/qemu-options.hx index 2be0cbd2549b..23ff12c1b183 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -2723,6 +2723,7 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev, " configure a network backend to connect to another net= work\n" " using an UDP tunnel\n" "-netdev stream,id=3Dstr[,server=3Don|off],addr.type=3Dinet,addr.host= =3Dhost,addr.port=3Dport\n" + "-netdev stream,id=3Dstr[,server=3Don|off],addr.type=3Dunix,addr.path= =3Dpath\n" "-netdev stream,id=3Dstr[,server=3Don|off],addr.type=3Dfd,addr.str=3Dh= \n" " configure a network backend to connect to another net= work\n" " using a socket connection in stream mode.\n" --=20 2.36.1