Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

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

1 files changed, 229 insertions, 0 deletions

diff --git a/lib/util/server_id.c b/lib/util/server_id.c
new file mode 100644
index 0000000..690b9dd
--- /dev/null
+++ b/lib/util/server_id.c
@@ -0,0 +1,229 @@
+/*
+   Unix SMB/CIFS implementation.
+   Samba utility functions
+   Copyright (C) Andrew Bartlett 2011
+
+   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 "replace.h"
+#include "lib/util/debug.h"
+#include "lib/util/fault.h"
+#include "lib/util/server_id.h"
+#include "lib/util/byteorder.h"
+#include "librpc/gen_ndr/server_id.h"
+
+bool server_id_same_process(const struct server_id *p1,
+			    const struct server_id *p2)
+{
+	return ((p1->pid == p2->pid) && (p1->vnn == p2->vnn));
+}
+
+int server_id_cmp(const struct server_id *p1, const struct server_id *p2)
+{
+	if (p1->vnn != p2->vnn) {
+		return (p1->vnn < p2->vnn) ? -1 : 1;
+	}
+	if (p1->pid != p2->pid) {
+		return (p1->pid < p2->pid) ? -1 : 1;
+	}
+	if (p1->task_id != p2->task_id) {
+		return (p1->task_id < p2->task_id) ? -1 : 1;
+	}
+	if (p1->unique_id != p2->unique_id) {
+		return (p1->unique_id < p2->unique_id) ? -1 : 1;
+	}
+	return 0;
+}
+
+bool server_id_equal(const struct server_id *p1, const struct server_id *p2)
+{
+	int cmp = server_id_cmp(p1, p2);
+	return (cmp == 0);
+}
+
+char *server_id_str_buf(struct server_id id, struct server_id_buf *dst)
+{
+	if (server_id_is_disconnected(&id)) {
+		strlcpy(dst->buf, "disconnected", sizeof(dst->buf));
+	} else if ((id.vnn == NONCLUSTER_VNN) && (id.task_id == 0)) {
+		snprintf(dst->buf, sizeof(dst->buf), "%llu",
+			 (unsigned long long)id.pid);
+	} else if (id.vnn == NONCLUSTER_VNN) {
+		snprintf(dst->buf, sizeof(dst->buf), "%llu.%u",
+			 (unsigned long long)id.pid, (unsigned)id.task_id);
+	} else if (id.task_id == 0) {
+		snprintf(dst->buf, sizeof(dst->buf), "%u:%llu",
+			 (unsigned)id.vnn, (unsigned long long)id.pid);
+	} else {
+		snprintf(dst->buf, sizeof(dst->buf), "%u:%llu.%u",
+			 (unsigned)id.vnn,
+			 (unsigned long long)id.pid,
+			 (unsigned)id.task_id);
+	}
+	return dst->buf;
+}
+
+size_t server_id_str_buf_unique(struct server_id id, char *buf, size_t buflen)
+{
+	struct server_id_buf idbuf;
+	char unique_buf[21];	/* 2^64 is 18446744073709551616, 20 chars */
+	size_t idlen, unique_len, needed;
+
+	server_id_str_buf(id, &idbuf);
+
+	idlen = strlen(idbuf.buf);
+	unique_len = snprintf(unique_buf, sizeof(unique_buf), "%"PRIu64,
+			      id.unique_id);
+	needed = idlen + unique_len + 2;
+
+	if (buflen >= needed) {
+		memcpy(buf, idbuf.buf, idlen);
+		buf[idlen] = '/';
+		memcpy(buf + idlen + 1, unique_buf, unique_len+1);
+	}
+
+	return needed;
+}
+
+struct server_id server_id_from_string(uint32_t local_vnn,
+				       const char *pid_string)
+{
+	struct server_id templ = {
+		.vnn = NONCLUSTER_VNN, .pid = UINT64_MAX
+	};
+	struct server_id result;
+	int ret;
+
+	/*
+	 * We accept various forms with 1, 2 or 3 component forms
+	 * because the server_id_str_buf() can print different forms, and
+	 * we want backwards compatibility for scripts that may call
+	 * smbclient.
+	 */
+
+	result = templ;
+	ret = sscanf(pid_string, "%"SCNu32":%"SCNu64".%"SCNu32"/%"SCNu64,
+		     &result.vnn, &result.pid, &result.task_id,
+		     &result.unique_id);
+	if (ret == 4) {
+		return result;
+	}
+
+	result = templ;
+	ret = sscanf(pid_string, "%"SCNu32":%"SCNu64".%"SCNu32,
+		     &result.vnn, &result.pid, &result.task_id);
+	if (ret == 3) {
+		return result;
+	}
+
+	result = templ;
+	ret = sscanf(pid_string, "%"SCNu32":%"SCNu64"/%"SCNu64,
+		     &result.vnn, &result.pid, &result.unique_id);
+	if (ret == 3) {
+		return result;
+	}
+
+	result = templ;
+	ret = sscanf(pid_string, "%"SCNu32":%"SCNu64,
+		     &result.vnn, &result.pid);
+	if (ret == 2) {
+		return result;
+	}
+
+	result = templ;
+	ret = sscanf(pid_string, "%"SCNu64".%"SCNu32"/%"SCNu64,
+		     &result.pid, &result.task_id, &result.unique_id);
+	if (ret == 3) {
+		result.vnn = local_vnn;
+		return result;
+	}
+
+	result = templ;
+	ret = sscanf(pid_string, "%"SCNu64".%"SCNu32,
+		     &result.pid, &result.task_id);
+	if (ret == 2) {
+		result.vnn = local_vnn;
+		return result;
+	}
+
+	result = templ;
+	ret = sscanf(pid_string, "%"SCNu64"/%"SCNu64,
+		     &result.pid, &result.unique_id);
+	if (ret == 2) {
+		result.vnn = local_vnn;
+		return result;
+	}
+
+	result = templ;
+	ret = sscanf(pid_string, "%"SCNu64, &result.pid);
+	if (ret == 1) {
+		result.vnn = local_vnn;
+		return result;
+	}
+
+	if (strcmp(pid_string, "disconnected") == 0) {
+		server_id_set_disconnected(&result);
+		return result;
+	}
+
+	return templ;
+}
+
+/**
+ * Set the serverid to the special value that represents a disconnected
+ * client for (e.g.) durable handles.
+ */
+void server_id_set_disconnected(struct server_id *id)
+{
+	*id = (struct server_id) {
+		.pid = UINT64_MAX,
+		.task_id = UINT32_MAX,
+		.vnn = NONCLUSTER_VNN,
+		.unique_id = SERVERID_UNIQUE_ID_NOT_TO_VERIFY,
+	};
+}
+
+/**
+ * check whether a serverid is the special placeholder for
+ * a disconnected client
+ */
+bool server_id_is_disconnected(const struct server_id *id)
+{
+	struct server_id dis;
+
+	SMB_ASSERT(id != NULL);
+
+	server_id_set_disconnected(&dis);
+
+	return server_id_equal(id, &dis);
+}
+
+void server_id_put(uint8_t buf[SERVER_ID_BUF_LENGTH],
+		   const struct server_id id)
+{
+	SBVAL(buf, 0,  id.pid);
+	SIVAL(buf, 8,  id.task_id);
+	SIVAL(buf, 12, id.vnn);
+	SBVAL(buf, 16, id.unique_id);
+}
+
+void server_id_get(struct server_id *id,
+		   const uint8_t buf[SERVER_ID_BUF_LENGTH])
+{
+	id->pid       = BVAL(buf, 0);
+	id->task_id   = IVAL(buf, 8);
+	id->vnn       = IVAL(buf, 12);
+	id->unique_id = BVAL(buf, 16);
+}