diff options
Diffstat (limited to 'lib/util/server_id.c')
| -rw-r--r-- | lib/util/server_id.c | 229 |
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); +} |