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/*
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);
}
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