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* Session-id CLI functionality delayed: "lazy evaluation"

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* From a cli perspective this is a revert to 4.1 behaviour, where the cli does not immediately exit on start if the backend is not running, but with the new session-id function
This commit is contained in:
Olof hagsand 2020-02-05 15:37:25 +01:00
parent 39e7f387f8
commit c7d6f69a85
7 changed files with 128 additions and 53 deletions
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2
CHANGELOG.md
View file

@ -21,6 +21,8 @@
### Minor changes
* Session-id CLI functionality delayed: "lazy evaluation"
* From a cli perspective this is a revert to 4.1 behaviour, where the cli does not immediately exit on start if the backend is not running, but with the new session-id function
* Obsoleted and removed XMLDB format "tree". This function did not work. Only xml and json allowed.
* Test framework
* Added `-- -S <file>` command-line to main example to be able to return any state to main example.

6
apps/backend/backend_client.c
View file

@ -1427,11 +1427,15 @@ from_client_hello(clicon_handle h,
int retval = -1;
uint32_t id;
id = clicon_session_id_get(h);
if (clicon_session_id_get(h, &id) < 0){
clicon_err(OE_NETCONF, ENOENT, "session_id not set");
goto done;
}
id++;
clicon_session_id_set(h, id);
cprintf(cbret, "<hello><session-id>%u</session-id></hello>", id);
retval = 0;
done:
return retval;
}

12
apps/cli/cli_main.c
View file

@ -288,7 +288,6 @@ main(int argc, char **argv)
char *str;
int tabmode;
char *dir;
uint32_t id = 0;
cvec *nsctx_global = NULL; /* Global namespace context */
/* Defaults */
@ -607,17 +606,8 @@ main(int argc, char **argv)
}
/* Go into event-loop unless -1 command-line */
if (!once){
/* Send hello request to backend to get session-id back
* This is done once at the beginning of the session and then this is
* used by the client, even though new TCP sessions are created for
* each message sent to the backend.
*/
if (clicon_hello_req(h, &id) < 0)
goto done;
clicon_session_id_set(h, id);
if (!once)
retval = cli_interactive(h);
}
else
retval = 0;
done:

3
lib/clixon/clixon_data.h
View file

@ -98,7 +98,8 @@ int clicon_xml_changelog_set(clicon_handle h, cxobj *xchlog);
int clicon_argv_get(clicon_handle h, int *argc, char ***argv);
int clicon_argv_set(clicon_handle h, char *argv0, int argc, char **argv);
/*! Set and get (client/backend) session id */
int clicon_session_id_set(clicon_handle h, uint32_t id);
uint32_t clicon_session_id_get(clicon_handle h);
int clicon_session_id_get(clicon_handle h, uint32_t *id);
#endif /* _CLIXON_DATA_H_ */

21
lib/src/clixon_data.c
View file

@ -579,19 +579,24 @@ clicon_db_elmnt_set(clicon_handle h,
}
/*! Get session id
* @param[in] h Clicon handle
* @retval id Session identifier
* Two uses: the backend assigns session-id for clients.
* @param[in] h Clicon handle
* @param[out] sid Session identifier
* @retval 0 OK
* @retval -1 Session id not set
* Session-ids survive TCP sessions that are created for each message sent to the backend.
* The backend assigns session-id for clients: backend assigns, clients get it from backend.
*/
uint32_t
clicon_session_id_get(clicon_handle h)
int
clicon_session_id_get(clicon_handle h,
uint32_t *id)
{
clicon_hash_t *cdat = clicon_data(h);
void *p;
if ((p = clicon_hash_value(cdat, "session-id", NULL)) == NULL)
return 0;
return *(uint32_t*)p;
return -1;
*id = *(uint32_t*)p;
return 0;
}
/*! Set session id
@ -599,6 +604,7 @@ clicon_session_id_get(clicon_handle h)
* @param[in] id Session id
* @retval 0 OK
* @retval -1 Error
* Session-ids survive TCP sessions that are created for each message sent to the backend.
*/
int
clicon_session_id_set(clicon_handle h,
@ -609,3 +615,4 @@ clicon_session_id_set(clicon_handle h,
clicon_hash_add(cdat, "session-id", &id, sizeof(uint32_t));
return 0;
}

133
lib/src/clixon_proto_client.c
View file

@ -152,6 +152,34 @@ clicon_rpc_msg(clicon_handle h,
return retval;
}
/*! Check if there is a valid (cached) session-id. If not, send a hello request to backend
* Session-ids survive TCP sessions that are created for each message sent to the backend.
* Clients use two approaches, either:
* (1) Once at the beginning of the session. Netconf and restconf does this
* (2) First usage, ie "lazy" evaluation when first needed
* @param[in] h clicon handle
* @param[out] session_id Session id
* @retval 0 OK and session_id set
* @retval -1 Error
*/
static int
session_id_check(clicon_handle h,
uint32_t *session_id)
{
int retval = -1;
uint32_t id;
if (clicon_session_id_get(h, &id) < 0){ /* Not set yet */
if (clicon_hello_req(h, &id) < 0)
goto done;
clicon_session_id_set(h, id);
}
retval = 0;
*session_id = id;
done:
return retval;
}
/*! Generic xml netconf clicon rpc
* Want to go over to use netconf directly between client and server,...
* @param[in] h clicon handle
@ -173,9 +201,12 @@ clicon_rpc_netconf(clicon_handle h,
int *sp)
{
int retval = -1;
uint32_t session_id;
struct clicon_msg *msg = NULL;
if ((msg = clicon_msg_encode(clicon_session_id_get(h), "%s", xmlstr)) < 0)
if (session_id_check(h, &session_id) < 0)
goto done;
if ((msg = clicon_msg_encode(session_id, "%s", xmlstr)) < 0)
goto done;
if (clicon_rpc_msg(h, msg, xret, sp) < 0)
goto done;
@ -304,7 +335,10 @@ clicon_rpc_get_config(clicon_handle h,
cxobj *xd;
cg_var *cv = NULL;
char *prefix;
uint32_t session_id;
if (session_id_check(h, &session_id) < 0)
goto done;
if ((cb = cbuf_new()) == NULL)
goto done;
cprintf(cb, "<rpc");
@ -328,8 +362,7 @@ clicon_rpc_get_config(clicon_handle h,
cprintf(cb, "/>");
}
cprintf(cb, "</get-config></rpc>");
if ((msg = clicon_msg_encode(clicon_session_id_get(h),
"%s", cbuf_get(cb))) == NULL)
if ((msg = clicon_msg_encode(session_id, "%s", cbuf_get(cb))) == NULL)
goto done;
if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
goto done;
@ -382,7 +415,10 @@ clicon_rpc_edit_config(clicon_handle h,
cxobj *xret = NULL;
cxobj *xerr;
char *username;
uint32_t session_id;
if (session_id_check(h, &session_id) < 0)
goto done;
if ((cb = cbuf_new()) == NULL)
goto done;
cprintf(cb, "<rpc xmlns=\"%s\"", NETCONF_BASE_NAMESPACE);
@ -395,8 +431,7 @@ clicon_rpc_edit_config(clicon_handle h,
if (xmlstr)
cprintf(cb, "%s", xmlstr);
cprintf(cb, "</edit-config></rpc>");
if ((msg = clicon_msg_encode(clicon_session_id_get(h),
"%s", cbuf_get(cb))) == NULL)
if ((msg = clicon_msg_encode(session_id, "%s", cbuf_get(cb))) == NULL)
goto done;
if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
goto done;
@ -438,10 +473,13 @@ clicon_rpc_copy_config(clicon_handle h,
cxobj *xret = NULL;
cxobj *xerr;
char *username;
uint32_t session_id;
if (session_id_check(h, &session_id) < 0)
goto done;
username = clicon_username_get(h);
if ((msg = clicon_msg_encode(clicon_session_id_get(h),
"<rpc username=\"%s\"><copy-config><source><%s/></source><target><%s/></target></copy-config></rpc>",
if ((msg = clicon_msg_encode(session_id,
"<rpc username=\"%s\"><copy-config><source><%s/></source><target><%s/></target></copy-config></rpc>",
username?username:"",
db1, db2)) == NULL)
goto done;
@ -479,9 +517,12 @@ clicon_rpc_delete_config(clicon_handle h,
cxobj *xret = NULL;
cxobj *xerr;
char *username;
uint32_t session_id;
if (session_id_check(h, &session_id) < 0)
goto done;
username = clicon_username_get(h);
if ((msg = clicon_msg_encode(clicon_session_id_get(h),
if ((msg = clicon_msg_encode(session_id,
"<rpc username=\"%s\"><edit-config><target><%s/></target><default-operation>none</default-operation><config operation=\"delete\"/></edit-config></rpc>",
username?username:"", db)) == NULL)
goto done;
@ -515,9 +556,12 @@ clicon_rpc_lock(clicon_handle h,
cxobj *xret = NULL;
cxobj *xerr;
char *username;
uint32_t session_id;
if (session_id_check(h, &session_id) < 0)
goto done;
username = clicon_username_get(h);
if ((msg = clicon_msg_encode(clicon_session_id_get(h),
if ((msg = clicon_msg_encode(session_id,
"<rpc username=\"%s\"><lock><target><%s/></target></lock></rpc>",
username?username:"", db)) == NULL)
goto done;
@ -551,9 +595,12 @@ clicon_rpc_unlock(clicon_handle h,
cxobj *xret = NULL;
cxobj *xerr;
char *username;
uint32_t session_id;
if (session_id_check(h, &session_id) < 0)
goto done;
username = clicon_username_get(h);
if ((msg = clicon_msg_encode(clicon_session_id_get(h),
if ((msg = clicon_msg_encode(session_id,
"<rpc username=\"%s\"><unlock><target><%s/></target></unlock></rpc>", username?username:"", db)) == NULL)
goto done;
if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
@ -620,7 +667,10 @@ clicon_rpc_get(clicon_handle h,
char *username;
cg_var *cv = NULL;
char *prefix;
uint32_t session_id;
if (session_id_check(h, &session_id) < 0)
goto done;
if ((cb = cbuf_new()) == NULL)
goto done;
cprintf(cb, "<rpc");
@ -650,7 +700,7 @@ clicon_rpc_get(clicon_handle h,
cprintf(cb, "/>");
}
cprintf(cb, "</get></rpc>");
if ((msg = clicon_msg_encode(clicon_session_id_get(h),
if ((msg = clicon_msg_encode(session_id,
"%s", cbuf_get(cb))) == NULL)
goto done;
if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
@ -691,9 +741,12 @@ clicon_rpc_close_session(clicon_handle h)
cxobj *xret = NULL;
cxobj *xerr;
char *username;
uint32_t session_id;
if (session_id_check(h, &session_id) < 0)
goto done;
username = clicon_username_get(h);
if ((msg = clicon_msg_encode(clicon_session_id_get(h),
if ((msg = clicon_msg_encode(session_id,
"<rpc username=\"%s\"><close-session/></rpc>",
username?username:"")) == NULL)
goto done;
@ -727,9 +780,12 @@ clicon_rpc_kill_session(clicon_handle h,
cxobj *xret = NULL;
cxobj *xerr;
char *username;
uint32_t my_session_id; /* Not the one to kill */
if (session_id_check(h, &my_session_id) < 0)
goto done;
username = clicon_username_get(h);
if ((msg = clicon_msg_encode(clicon_session_id_get(h),
if ((msg = clicon_msg_encode(my_session_id,
"<rpc username=\"%s\"><kill-session><session-id>%u</session-id></kill-session></rpc>",
username?username:"", session_id)) == NULL)
goto done;
@ -763,9 +819,12 @@ clicon_rpc_validate(clicon_handle h,
cxobj *xret = NULL;
cxobj *xerr;
char *username;
uint32_t session_id;
if (session_id_check(h, &session_id) < 0)
goto done;
username = clicon_username_get(h);
if ((msg = clicon_msg_encode(clicon_session_id_get(h),
if ((msg = clicon_msg_encode(session_id,
"<rpc username=\"%s\"><validate><source><%s/></source></validate></rpc>", username?username:"", db)) == NULL)
goto done;
if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
@ -796,9 +855,12 @@ clicon_rpc_commit(clicon_handle h)
cxobj *xret = NULL;
cxobj *xerr;
char *username;
uint32_t session_id;
if (session_id_check(h, &session_id) < 0)
goto done;
username = clicon_username_get(h);
if ((msg = clicon_msg_encode(clicon_session_id_get(h),
if ((msg = clicon_msg_encode(session_id,
"<rpc username=\"%s\"><commit/></rpc>", username?username:"")) == NULL)
goto done;
if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
@ -829,9 +891,12 @@ clicon_rpc_discard_changes(clicon_handle h)
cxobj *xret = NULL;
cxobj *xerr;
char *username;
uint32_t session_id;
if (session_id_check(h, &session_id) < 0)
goto done;
username = clicon_username_get(h);
if ((msg = clicon_msg_encode(clicon_session_id_get(h),
if ((msg = clicon_msg_encode(session_id,
"<rpc username=\"%s\"><discard-changes/></rpc>", username?username:"")) == NULL)
goto done;
if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
@ -870,9 +935,12 @@ clicon_rpc_create_subscription(clicon_handle h,
cxobj *xret = NULL;
cxobj *xerr;
char *username;
uint32_t session_id;
if (session_id_check(h, &session_id) < 0)
goto done;
username = clicon_username_get(h);
if ((msg = clicon_msg_encode(clicon_session_id_get(h),
if ((msg = clicon_msg_encode(session_id,
"<rpc username=\"%s\"><create-subscription xmlns=\"urn:ietf:params:xml:ns:netmod:notification\">"
"<stream>%s</stream>"
"<filter type=\"xpath\" select=\"%s\" />"
@ -910,9 +978,12 @@ clicon_rpc_debug(clicon_handle h,
cxobj *xret = NULL;
cxobj *xerr;
char *username;
uint32_t session_id;
if (session_id_check(h, &session_id) < 0)
goto done;
username = clicon_username_get(h);
if ((msg = clicon_msg_encode(clicon_session_id_get(h),
if ((msg = clicon_msg_encode(session_id,
"<rpc username=\"%s\"><debug xmlns=\"http://clicon.org/lib\"><level>%d</level></debug></rpc>", username?username:"", level)) == NULL)
goto done;
if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)

4
test/test_sock.sh
View file

@ -64,10 +64,10 @@ EOF
expectfn "$clixon_cli -1f $cfg show version" 0 "$version."
new "hello session-id 2"
expecteof "$clixon_util_socket -a $family -s $sock -D $DBG" 0 "<hello/>" "<hello><session-id>2</session-id></hello>"
expecteof "$clixon_util_socket -a $family -s $sock -D $DBG" 0 "<hello/>" "<hello><session-id>3</session-id></hello>"
new "hello session-id 2"
expecteof "$clixon_util_socket -a $family -s $sock -D $DBG" 0 "<hello/>" "<hello><session-id>3</session-id></hello>"
expecteof "$clixon_util_socket -a $family -s $sock -D $DBG" 0 "<hello/>" "<hello><session-id>4</session-id></hello>"
if [ $BE -ne 0 ]; then
new "Kill backend"