Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 216 insertions, 0 deletions

diff --git a/source3/client/dnsbrowse.c b/source3/client/dnsbrowse.c
new file mode 100644
index 0000000..be6eb88
--- /dev/null
+++ b/source3/client/dnsbrowse.c
@@ -0,0 +1,216 @@
+/*
+   Unix SMB/CIFS implementation.
+   DNS-SD browse client
+   Copyright (C) Rishi Srivatsavai 2007
+
+   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 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "client/client_proto.h"
+
+#ifdef WITH_DNSSD_SUPPORT
+
+#include <dns_sd.h>
+#include "system/select.h"
+
+/* Holds service instances found during DNS browse */
+struct mdns_smbsrv_result
+{
+	char *serviceName;
+	char *regType;
+	char *domain;
+	uint32_t ifIndex;
+	struct mdns_smbsrv_result *nextResult;
+};
+
+/* Maintains state during DNS browse */
+struct mdns_browse_state
+{
+	struct mdns_smbsrv_result *listhead; /* Browse result list head */
+	int browseDone;
+
+};
+
+
+static void
+do_smb_resolve_reply (DNSServiceRef sdRef, DNSServiceFlags flags,
+		uint32_t interfaceIndex, DNSServiceErrorType errorCode,
+		const char *fullname, const char *hosttarget, uint16_t port,
+		uint16_t txtLen, const unsigned char *txtRecord, void *context)
+{
+	printf("SMB service available on %s port %u\n",
+		hosttarget, ntohs(port));
+}
+
+
+static void do_smb_resolve(struct mdns_smbsrv_result *browsesrv)
+{
+	DNSServiceRef mdns_conn_sdref = NULL;
+	int mdnsfd;
+	int fdsetsz;
+	int ret;
+	struct timeval tv;
+	DNSServiceErrorType err;
+
+	TALLOC_CTX * ctx = talloc_tos();
+
+	err = DNSServiceResolve(&mdns_conn_sdref, 0 /* flags */,
+		browsesrv->ifIndex,
+		browsesrv->serviceName, browsesrv->regType, browsesrv->domain,
+		do_smb_resolve_reply, NULL);
+
+	if (err != kDNSServiceErr_NoError) {
+		return;
+	}
+
+	mdnsfd = DNSServiceRefSockFD(mdns_conn_sdref);
+	for (;;)  {
+		int revents;
+
+		ret = poll_one_fd(mdnsfd, POLLIN|POLLHUP, 1000, &revents);
+		if (ret <= 0 && errno != EINTR) {
+			break;
+		}
+
+		if (revents & (POLLIN|POLLHUP|POLLERR)) {
+			/* Invoke callback function */
+			DNSServiceProcessResult(mdns_conn_sdref);
+			break;
+		}
+	}
+
+	TALLOC_FREE(fdset);
+	DNSServiceRefDeallocate(mdns_conn_sdref);
+}
+
+
+static void
+do_smb_browse_reply(DNSServiceRef sdRef, DNSServiceFlags flags,
+        uint32_t interfaceIndex, DNSServiceErrorType errorCode,
+        const char  *serviceName, const char *regtype,
+        const char  *replyDomain, void  *context)
+{
+	struct mdns_browse_state *bstatep = (struct mdns_browse_state *)context;
+	struct mdns_smbsrv_result *bresult;
+
+	if (bstatep == NULL) {
+		return;
+	}
+
+	if (errorCode != kDNSServiceErr_NoError) {
+		bstatep->browseDone = 1;
+		return;
+	}
+
+	if (flags & kDNSServiceFlagsMoreComing) {
+		bstatep->browseDone = 0;
+	} else {
+		bstatep->browseDone = 1;
+	}
+
+	if (!(flags & kDNSServiceFlagsAdd)) {
+		return;
+	}
+
+	bresult = talloc_array(talloc_tos(), struct mdns_smbsrv_result, 1);
+	if (bresult == NULL) {
+		return;
+	}
+
+	if (bstatep->listhead != NULL) {
+		bresult->nextResult = bstatep->listhead;
+	}
+
+	bresult->serviceName = talloc_strdup(talloc_tos(), serviceName);
+	bresult->regType = talloc_strdup(talloc_tos(), regtype);
+	bresult->domain = talloc_strdup(talloc_tos(), replyDomain);
+	bresult->ifIndex = interfaceIndex;
+	bstatep->listhead = bresult;
+}
+
+int do_smb_browse(void)
+{
+	int mdnsfd;
+	int fdsetsz;
+	int ret;
+	struct mdns_browse_state bstate;
+	struct mdns_smbsrv_result *resptr;
+	struct timeval tv;
+	DNSServiceRef mdns_conn_sdref = NULL;
+	DNSServiceErrorType err;
+
+	TALLOC_CTX * ctx = talloc_stackframe();
+
+	ZERO_STRUCT(bstate);
+
+	err = DNSServiceBrowse(&mdns_conn_sdref, 0, 0, "_smb._tcp", "",
+			do_smb_browse_reply, &bstate);
+
+	if (err != kDNSServiceErr_NoError) {
+		d_printf("Error connecting to the Multicast DNS daemon\n");
+		TALLOC_FREE(ctx);
+		return 1;
+	}
+
+	mdnsfd = DNSServiceRefSockFD(mdns_conn_sdref);
+	for (;;)  {
+		int revents;
+
+		ret = poll_one_fd(mdnsfd, POLLIN|POLLHUP, 1000, &revents);
+		if (ret <= 0 && errno != EINTR) {
+			break;
+		}
+
+		if (revents & (POLLIN|POLLHUP|POLLERR)) {
+			/* Invoke callback function */
+			if (DNSServiceProcessResult(mdns_conn_sdref)) {
+				break;
+			}
+			if (bstate.browseDone) {
+				break;
+			}
+		}
+	}
+
+	DNSServiceRefDeallocate(mdns_conn_sdref);
+
+	if (bstate.listhead != NULL) {
+		resptr = bstate.listhead;
+		while (resptr != NULL) {
+			struct mdns_smbsrv_result *oldresptr;
+			oldresptr = resptr;
+
+			/* Resolve smb service instance */
+			do_smb_resolve(resptr);
+
+			resptr = resptr->nextResult;
+		}
+	}
+
+	TALLOC_FREE(ctx);
+	return 0;
+}
+
+#else /* WITH_DNSSD_SUPPORT */
+
+int do_smb_browse(void)
+{
+    d_printf("DNS-SD browsing is not supported on this platform\n");
+    return 1;
+}
+
+#endif /* WITH_DNSSD_SUPPORT */
+
+