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Tsirkin" , Laurent Vivier , Samuel Thibault , "Dr. David Alan Gilbert" , Paul Durrant , Stefan Weil , Markus Armbruster , Stefano Brivio Subject: [PATCH v12 12/17] net: dgram: add unix socket Date: Thu, 20 Oct 2022 11:16:19 +0200 Message-Id: <20221020091624.48368-13-lvivier@redhat.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221020091624.48368-1-lvivier@redhat.com> References: <20221020091624.48368-1-lvivier@redhat.com> MIME-Version: 1.0 X-Provags-ID: V03:K1:BVZEx5zvFGBOysZ1DDE1pAa5ophVRfiUasBIqXl9s0Eso95KI5c P1qLV0nQ6xqpZgLe+bFJ41uUJxk/1gu1rq6fQbaJISXUwsgNDhtD0Jlu3+o8ktyvqeWxjtM N/WtShaYg09S9N+AFDB2pRfSBUPtPsOawMZdffykNOijJRmZLf+zbEOkxWhRxlUwa14DeCi 8hdBZWoVo4RTLK4UQQEPg== X-UI-Out-Filterresults: notjunk:1;V03:K0:PyQrMzdLpxs=:tfWoNznLtpDAoxYGj9QDcu kJ3KjYTfFxe/hY6YjwJr9OYHc+IpcTDsagRzYPoH3VWNmb5Ff+PtHvvoAU79Wb8JnficAuieJ aXUBrcS70CYHBdNO0TSn/yC4rZiz+lLbpNj3bZkOX2hcrdX3MTdJsL2FAQPC4hxcOmSmcDpmz EPIcwLTFB8bkjrfWX2oLsqdjGeMrOhBmqXBnJsoo8NZ1C8HDsRo7C07IEd+OlipKBP4CsbsiK mOJy3hRxoeO40vL8GkiQexUtIMWHmx0N9i2xytgH//AsymdC8vP0xGujP0pTot1UQIvdTL107 AeAyZliftb50BhCHkQ9o4gujcT8E69Ul+zR8G5RU5nIHl6X/BkUtP4oUZv/TxerL04aX0PpPq LyWPctknmuwGVVRn1Gzm+5y6StciJbAqV3SwwkJw/WJ2QHBqhNzFK2VA2x1+1880d2IOJ6Gt2 QFX7r8NjVygVI9HBiNoW7vXWAoEH6ksXfjU6JxYrX1+vXJEpro/fAcSI4vcPjLYWvIyGtaXTY p1Q1oI+yZ61sNoxYXSPvZTi4an3RftZy7pjD6yrnpIYLRZ8z6mkUGte4dOVl1EOSrwAnvqpyE E38X0yyPK///63k8sdYp8r9FOyHg5INB7iP8j0PCBrKs29QaPbKIw3alTVPgS2tNMrFHqvOQ1 wWtxzfwxPRdEUdVzfc/X+175M52jIGUeL8WPqc7spKCqj8HRqQ9TAZGHznN0Pe752IcbbO8dv KxrafO9A9+fklzckOutBE7HYPgWqJZgVkcijRfl/VMEVF1JQrhC3Pt8UUTvNvl8ZQwOAhr7+v pJYpLqz Received-SPF: permerror client-ip=212.227.126.187; envelope-from=lvivier@redhat.com; helo=mout.kundenserver.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_FAIL=0.001, SPF_HELO_NONE=0.001 autolearn=no 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Laurent Vivier Reviewed-by: Stefano Brivio Reviewed-by: David Gibson Acked-by: Michael S. Tsirkin QAPI schema Acked-by: Markus Armbruster --- net/dgram.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++- qapi/net.json | 2 +- qemu-options.hx | 1 + 3 files changed, 55 insertions(+), 2 deletions(-) diff --git a/net/dgram.c b/net/dgram.c index e581cc62f39f..02a189e36358 100644 --- a/net/dgram.c +++ b/net/dgram.c @@ -426,6 +426,7 @@ int net_init_dgram(const Netdev *netdev, const char *name, SocketAddress *remote, *local; struct sockaddr *dest_addr; struct sockaddr_in laddr_in, raddr_in; + struct sockaddr_un laddr_un, raddr_un; socklen_t dest_len; assert(netdev->type == NET_CLIENT_DRIVER_DGRAM); @@ -465,7 +466,7 @@ int net_init_dgram(const Netdev *netdev, const char *name, } } else { if (local->type != SOCKET_ADDRESS_TYPE_FD) { - error_setg(errp, "type=inet requires remote parameter"); + error_setg(errp, "type=inet or unix require remote parameter"); return -1; } } @@ -508,6 +509,53 @@ int net_init_dgram(const Netdev *netdev, const char *name, dest_addr = g_malloc(dest_len); memcpy(dest_addr, &raddr_in, dest_len); break; + case SOCKET_ADDRESS_TYPE_UNIX: + ret = unlink(local->u.q_unix.path); + if (ret < 0 && errno != ENOENT) { + error_setg_errno(errp, errno, "failed to unlink socket %s", + local->u.q_unix.path); + return -1; + } + + laddr_un.sun_family = PF_UNIX; + ret = snprintf(laddr_un.sun_path, sizeof(laddr_un.sun_path), "%s", + local->u.q_unix.path); + if (ret < 0 || ret >= sizeof(laddr_un.sun_path)) { + error_setg(errp, "UNIX socket path '%s' is too long", + local->u.q_unix.path); + error_append_hint(errp, "Path must be less than %zu bytes\n", + sizeof(laddr_un.sun_path)); + } + + raddr_un.sun_family = PF_UNIX; + ret = snprintf(raddr_un.sun_path, sizeof(raddr_un.sun_path), "%s", + remote->u.q_unix.path); + if (ret < 0 || ret >= sizeof(raddr_un.sun_path)) { + error_setg(errp, "UNIX socket path '%s' is too long", + remote->u.q_unix.path); + error_append_hint(errp, "Path must be less than %zu bytes\n", + sizeof(raddr_un.sun_path)); + } + + fd = qemu_socket(PF_UNIX, SOCK_DGRAM, 0); + if (fd < 0) { + error_setg_errno(errp, errno, "can't create datagram socket"); + return -1; + } + + ret = bind(fd, (struct sockaddr *)&laddr_un, sizeof(laddr_un)); + if (ret < 0) { + error_setg_errno(errp, errno, "can't bind unix=%s to socket", + laddr_un.sun_path); + closesocket(fd); + return -1; + } + qemu_socket_set_nonblock(fd); + + dest_len = sizeof(raddr_un); + dest_addr = g_malloc(dest_len); + memcpy(dest_addr, &raddr_un, dest_len); + break; case SOCKET_ADDRESS_TYPE_FD: fd = monitor_fd_param(monitor_cur(), local->u.fd.str, errp); if (fd == -1) { @@ -546,6 +594,10 @@ int net_init_dgram(const Netdev *netdev, const char *name, inet_ntoa(raddr_in.sin_addr), ntohs(raddr_in.sin_port)); break; + case SOCKET_ADDRESS_TYPE_UNIX: + qemu_set_info_str(&s->nc, "udp=%s:%s", + laddr_un.sun_path, raddr_un.sun_path); + break; case SOCKET_ADDRESS_TYPE_FD: { SocketAddress *sa; SocketAddressType sa_type; diff --git a/qapi/net.json b/qapi/net.json index aed4ce1a97ff..39388b1b6c41 100644 --- a/qapi/net.json +++ b/qapi/net.json @@ -600,7 +600,7 @@ # @remote: remote address # @local: local address # -# Only SocketAddress types 'inet' and 'fd' are supported. +# Only SocketAddress types 'unix', 'inet' and 'fd' are supported. # # If remote address is present and it's a multicast address, local address # is optional. Otherwise local address is required and remote address is diff --git a/qemu-options.hx b/qemu-options.hx index 98e2595df93b..fafb214cb89f 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -2782,6 +2782,7 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev, " configure a network backend to connect to a multicast maddr and port\n" " use ``local.host=addr`` to specify the host address to send packets from\n" "-netdev dgram,id=str,local.type=inet,local.host=addr,local.port=port[,remote.type=inet,remote.host=addr,remote.port=port]\n" + "-netdev dgram,id=str,local.type=unix,local.path=path[,remote.type=unix,remote.path=path]\n" "-netdev dgram,id=str,local.type=fd,local.str=file-descriptor\n" " configure a network backend to connect to another network\n" " using an UDP tunnel\n"