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-rw-r--r--lib/util/server_id.c229
1 files changed, 229 insertions, 0 deletions
diff --git a/lib/util/server_id.c b/lib/util/server_id.c
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--- /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);
+}