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gerrit.cesnet.cz / github / CESNET / libnetconf2 / 3bcb8ee08a655dce8ce08eba55ef7fe2502dcd7c / . / src / session_client.c
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/**
* \file session_client.c
* \author Michal Vasko <mvasko@cesnet.cz>
* \brief libnetconf2 session client functions
*
* Copyright (c) 2015 CESNET, z.s.p.o.
*
* This source code is licensed under BSD 3-Clause License (the "License").
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://opensource.org/licenses/BSD-3-Clause
*/
#define _GNU_SOURCE
#ifdef __linux__
# include <sys/syscall.h>
#endif
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/select.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <poll.h>
#include <pwd.h>
#include <libyang/libyang.h>
#include "compat.h"
#include "libnetconf.h"
#include "session_client.h"
#include "messages_client.h"
#include "../modules/ietf_netconf_monitoring@2010-10-04_yang.h"
#include "../modules/ietf_netconf@2013-09-29_yang.h"
static const char *ncds2str[] = {NULL, "config", "url", "running", "startup", "candidate"};
#ifdef NC_ENABLED_SSH
int sshauth_hostkey_check(const char *hostname, ssh_session session, void *priv);
char *sshauth_password(const char *username, const char *hostname, void *priv);
char *sshauth_interactive(const char *auth_name, const char *instruction, const char *prompt, int echo, void *priv);
char *sshauth_privkey_passphrase(const char* privkey_path, void *priv);
#endif /* NC_ENABLED_SSH */
static pthread_once_t nc_client_context_once = PTHREAD_ONCE_INIT;
static pthread_key_t nc_client_context_key;
#ifdef __linux__
static struct nc_client_context context_main = {
.opts.ka = {
.enabled = 1,
.idle_time = 1,
.max_probes = 10,
.probe_interval = 5
},
#ifdef NC_ENABLED_SSH
.ssh_opts = {
.auth_pref = {{NC_SSH_AUTH_INTERACTIVE, 3}, {NC_SSH_AUTH_PASSWORD, 2}, {NC_SSH_AUTH_PUBLICKEY, 1}},
.auth_hostkey_check = sshauth_hostkey_check,
.auth_password = sshauth_password,
.auth_interactive = sshauth_interactive,
.auth_privkey_passphrase = sshauth_privkey_passphrase
},
.ssh_ch_opts = {
.auth_pref = {{NC_SSH_AUTH_INTERACTIVE, 1}, {NC_SSH_AUTH_PASSWORD, 2}, {NC_SSH_AUTH_PUBLICKEY, 3}},
.auth_hostkey_check = sshauth_hostkey_check,
.auth_password = sshauth_password,
.auth_interactive = sshauth_interactive,
.auth_privkey_passphrase = sshauth_privkey_passphrase
},
#endif /* NC_ENABLED_SSH */
/* .tls_ structures zeroed */
.refcount = 0
};
#endif
static void
nc_client_context_free(void *ptr)
{
struct nc_client_context *c = (struct nc_client_context *)ptr;
if (--(c->refcount)) {
/* still used */
return;
}
#ifdef __linux__
/* in __linux__ we use static memory in the main thread,
* so this check is for programs terminating the main()
* function by pthread_exit() :)
*/
if (c != &context_main)
#endif
{
/* for the main thread the same is done in nc_client_destroy() */
free(c->opts.schema_searchpath);
#if defined(NC_ENABLED_SSH) || defined(NC_ENABLED_TLS)
int i;
for (i = 0; i < c->opts.ch_bind_count; ++i) {
close(c->opts.ch_binds[i].sock);
free((char *)c->opts.ch_binds[i].address);
}
free(c->opts.ch_binds);
c->opts.ch_binds = NULL;
c->opts.ch_bind_count = 0;
#endif
#ifdef NC_ENABLED_SSH
_nc_client_ssh_destroy_opts(&c->ssh_opts);
_nc_client_ssh_destroy_opts(&c->ssh_ch_opts);
#endif
#ifdef NC_ENABLED_TLS
_nc_client_tls_destroy_opts(&c->tls_opts);
_nc_client_tls_destroy_opts(&c->tls_ch_opts);
#endif
free(c);
}
}
static void
nc_client_context_createkey(void)
{
int r;
/* initiate */
while ((r = pthread_key_create(&nc_client_context_key, nc_client_context_free)) == EAGAIN);
pthread_setspecific(nc_client_context_key, NULL);
}
struct nc_client_context *
nc_client_context_location(void)
{
struct nc_client_context *e;
pthread_once(&nc_client_context_once, nc_client_context_createkey);
e = pthread_getspecific(nc_client_context_key);
if (!e) {
/* prepare ly_err storage */
#ifdef __linux__
if (getpid() == syscall(SYS_gettid)) {
/* main thread - use global variable instead of thread-specific variable. */
e = &context_main;
} else
#endif /* __linux__ */
{
e = calloc(1, sizeof *e);
/* set default values */
e->refcount = 1;
#ifdef NC_ENABLED_SSH
e->ssh_opts.auth_pref[0].type = NC_SSH_AUTH_INTERACTIVE;
e->ssh_opts.auth_pref[0].value = 3;
e->ssh_opts.auth_pref[1].type = NC_SSH_AUTH_PASSWORD;
e->ssh_opts.auth_pref[1].value = 2;
e->ssh_opts.auth_pref[2].type = NC_SSH_AUTH_PUBLICKEY;
e->ssh_opts.auth_pref[2].value = 1;
e->ssh_opts.auth_hostkey_check = sshauth_hostkey_check;
e->ssh_opts.auth_password = sshauth_password;
e->ssh_opts.auth_interactive = sshauth_interactive;
e->ssh_opts.auth_privkey_passphrase = sshauth_privkey_passphrase;
/* callhome settings are the same except the inverted auth methods preferences */
memcpy(&e->ssh_ch_opts, &e->ssh_opts, sizeof e->ssh_ch_opts);
e->ssh_ch_opts.auth_pref[0].value = 1;
e->ssh_ch_opts.auth_pref[1].value = 2;
e->ssh_ch_opts.auth_pref[2].value = 3;
#endif /* NC_ENABLED_SSH */
}
pthread_setspecific(nc_client_context_key, e);
}
return e;
}
#define client_opts nc_client_context_location()->opts
API void *
nc_client_get_thread_context(void)
{
return nc_client_context_location();
}
API void
nc_client_set_thread_context(void *context)
{
struct nc_client_context *old, *new;
if (!context) {
ERRARG(context);
return;
}
new = (struct nc_client_context *)context;
old = nc_client_context_location();
if (old == new) {
/* nothing to change */
return;
}
/* replace old by new, increase reference counter in the newly set context */
nc_client_context_free(old);
new->refcount++;
pthread_setspecific(nc_client_context_key, new);
}
int
nc_session_new_ctx(struct nc_session *session, struct ly_ctx *ctx)
{
/* assign context (dicionary needed for handshake) */
if (!ctx) {
ctx = ly_ctx_new(NULL, LY_CTX_NOYANGLIBRARY);
if (!ctx) {
return EXIT_FAILURE;
}
/* user path must be first, the first path is used to store schemas retreived via get-schema */
if (client_opts.schema_searchpath) {
ly_ctx_set_searchdir(ctx, client_opts.schema_searchpath);
} else if (!access(NC_YANG_DIR, F_OK)) {
ly_ctx_set_searchdir(ctx, NC_YANG_DIR);
}
/* set callback for getting schemas, if provided */
ly_ctx_set_module_imp_clb(ctx, client_opts.schema_clb, client_opts.schema_clb_data);
} else {
session->flags |= NC_SESSION_SHAREDCTX;
}
session->ctx = ctx;
return EXIT_SUCCESS;
}
API int
nc_client_set_schema_searchpath(const char *path)
{
if (client_opts.schema_searchpath) {
free(client_opts.schema_searchpath);
}
if (path) {
client_opts.schema_searchpath = strdup(path);
if (!client_opts.schema_searchpath) {
ERRMEM;
return 1;
}
} else {
client_opts.schema_searchpath = NULL;
}
return 0;
}
API const char *
nc_client_get_schema_searchpath(void)
{
return client_opts.schema_searchpath;
}
API int
nc_client_set_schema_callback(ly_module_imp_clb clb, void *user_data)
{
client_opts.schema_clb = clb;
if (clb) {
client_opts.schema_clb_data = user_data;
} else {
client_opts.schema_clb_data = NULL;
}
return 0;
}
API ly_module_imp_clb
nc_client_get_schema_callback(void **user_data)
{
if (user_data) {
(*user_data) = client_opts.schema_clb_data;
}
return client_opts.schema_clb;
}
struct schema_info {
char *name;
char *revision;
struct {
char *name;
char *revision;
} *submodules;
struct ly_set features;
int implemented;
};
struct clb_data_s {
void *user_data;
ly_module_imp_clb user_clb;
struct schema_info *schemas;
struct nc_session *session;
int has_get_schema;
};
static char *
retrieve_schema_data_localfile(const char *name, const char *rev, struct clb_data_s *clb_data,
LYS_INFORMAT *format)
{
char *localfile = NULL;
FILE *f;
long length, l;
char *model_data = NULL;
if (lys_search_localfile(ly_ctx_get_searchdirs(clb_data->session->ctx),
!(ly_ctx_get_options(clb_data->session->ctx) & LY_CTX_DISABLE_SEARCHDIR_CWD),
name, rev, &localfile, format)) {
return NULL;
}
if (localfile) {
VRB("Session %u: reading schema from localfile \"%s\".", clb_data->session->id, localfile);
f = fopen(localfile, "r");
if (!f) {
ERR("Session %u: unable to open \"%s\" file to get schema (%s).",
clb_data->session->id, localfile, strerror(errno));
free(localfile);
return NULL;
}
fseek(f, 0, SEEK_END);
length = ftell(f);
if (length < 0) {
ERR("Session %u: unable to get size of schema file \"%s\".",
clb_data->session->id, localfile);
free(localfile);
fclose(f);
return NULL;
}
fseek(f, 0, SEEK_SET);
model_data = malloc(length + 1);
if (!model_data) {
ERRMEM;
} else if ((l = fread(model_data, 1, length, f)) != length) {
ERR("Session %u: reading schema from \"%s\" failed (%d bytes read, but %d expected).",
clb_data->session->id, localfile, l, length);
free(model_data);
model_data = NULL;
} else {
/* terminating NULL byte */
model_data[length] = '\0';
}
fclose(f);
free(localfile);
}
return model_data;
}
static char *
retrieve_schema_data_getschema(const char *name, const char *rev, struct clb_data_s *clb_data,
LYS_INFORMAT *format)
{
struct nc_rpc *rpc;
struct nc_reply *reply;
struct nc_reply_data *data_rpl;
struct nc_reply_error *error_rpl;
struct lyd_node_anydata *get_schema_data;
NC_MSG_TYPE msg;
uint64_t msgid;
char *localfile = NULL;
FILE *f;
char *model_data = NULL;
VRB("Session %u: reading schema from server via get-schema.", clb_data->session->id);
rpc = nc_rpc_getschema(name, rev, "yang", NC_PARAMTYPE_CONST);
while ((msg = nc_send_rpc(clb_data->session, rpc, 0, &msgid)) == NC_MSG_WOULDBLOCK) {
usleep(1000);
}
if (msg == NC_MSG_ERROR) {
ERR("Session %u: failed to send the <get-schema> RPC.", clb_data->session->id);
nc_rpc_free(rpc);
return NULL;
}
do {
msg = nc_recv_reply(clb_data->session, rpc, msgid, NC_READ_ACT_TIMEOUT * 1000, 0, &reply);
} while (msg == NC_MSG_NOTIF || msg == NC_MSG_REPLY_ERR_MSGID);
nc_rpc_free(rpc);
if (msg == NC_MSG_WOULDBLOCK) {
ERR("Session %u: timeout for receiving reply to a <get-schema> expired.", clb_data->session->id);
return NULL;
} else if (msg == NC_MSG_ERROR || reply == NULL) {
ERR("Session %u: failed to receive a reply to <get-schema>.", clb_data->session->id);
return NULL;
}
switch (reply->type) {
case NC_RPL_OK:
ERR("Session %u: unexpected reply OK to a <get-schema> RPC.", clb_data->session->id);
nc_reply_free(reply);
return NULL;
case NC_RPL_DATA:
/* fine */
break;
case NC_RPL_ERROR:
error_rpl = (struct nc_reply_error *)reply;
if (error_rpl->count) {
ERR("Session %u: error reply to a <get-schema> RPC (tag \"%s\", message \"%s\").",
clb_data->session->id, error_rpl->err[0].tag, error_rpl->err[0].message);
} else {
ERR("Session %u: unexpected reply error to a <get-schema> RPC.", clb_data->session->id);
}
nc_reply_free(reply);
return NULL;
case NC_RPL_NOTIF:
ERR("Session %u: unexpected reply notification to a <get-schema> RPC.", clb_data->session->id);
nc_reply_free(reply);
return NULL;
}
data_rpl = (struct nc_reply_data *)reply;
if (!data_rpl->data || (data_rpl->data->schema->nodetype != LYS_RPC) || strcmp(data_rpl->data->schema->name, "get-schema")
|| !data_rpl->data->child || (data_rpl->data->child->schema->nodetype != LYS_ANYXML)) {
ERR("Session %u: unexpected data in reply to a <get-schema> RPC.", clb_data->session->id);
nc_reply_free(reply);
return NULL;
}
get_schema_data = (struct lyd_node_anydata *)data_rpl->data->child;
switch (get_schema_data->value_type) {
case LYD_ANYDATA_CONSTSTRING:
case LYD_ANYDATA_STRING:
model_data = strdup(get_schema_data->value.str);
break;
case LYD_ANYDATA_DATATREE:
lyd_print_mem(&model_data, get_schema_data->value.tree, LYD_XML, LYP_WITHSIBLINGS);
break;
case LYD_ANYDATA_XML:
lyxml_print_mem(&model_data, get_schema_data->value.xml, LYXML_PRINT_SIBLINGS);
break;
case LYD_ANYDATA_JSON:
case LYD_ANYDATA_JSOND:
case LYD_ANYDATA_SXML:
case LYD_ANYDATA_SXMLD:
case LYD_ANYDATA_LYB:
case LYD_ANYDATA_LYBD:
ERRINT;
nc_reply_free(reply);
}
nc_reply_free(reply);
if (model_data && !model_data[0]) {
/* empty data */
free(model_data);
model_data = NULL;
}
/* try to store the model_data into local schema repository */
if (model_data) {
*format = LYS_IN_YANG;
if (client_opts.schema_searchpath) {
if (asprintf(&localfile, "%s/%s%s%s.yang", client_opts.schema_searchpath, name,
rev ? "@" : "", rev ? rev : "") == -1) {
ERRMEM;
} else {
f = fopen(localfile, "w");
if (!f) {
WRN("Unable to store \"%s\" as a local copy of schema retrieved via <get-schema> (%s).",
localfile, strerror(errno));
} else {
fputs(model_data, f);
fclose(f);
}
free(localfile);
}
}
}
return model_data;
}
static void free_with_user_data(void *data, void *user_data)
{
free(data);
(void)user_data;
}
static const char *
retrieve_schema_data(const char *mod_name, const char *mod_rev, const char *submod_name, const char *sub_rev,
void *user_data, LYS_INFORMAT *format, void (**free_module_data)(void *model_data, void *user_data))
{
struct clb_data_s *clb_data = (struct clb_data_s *)user_data;
unsigned int u, v, match = 1;
const char *name = NULL, *rev = NULL;
char *model_data = NULL;
/* get and check the final name and revision of the schema to be retrieved */
if (!mod_rev || !mod_rev[0]) {
/* newest revision requested - get the newest revision from the list of available modules on server */
match = 0;
for (u = 0; clb_data->schemas[u].name; ++u) {
if (strcmp(mod_name, clb_data->schemas[u].name)) {
continue;
}
if (!match || strcmp(mod_rev, clb_data->schemas[u].revision) > 0) {
mod_rev = clb_data->schemas[u].revision;
}
match = u + 1;
}
if (!match) {
WRN("Session %u: unable to identify revision of the schema \"%s\" from the available server side information.",
clb_data->session->id, mod_name);
}
}
if (submod_name) {
name = submod_name;
if (sub_rev) {
rev = sub_rev;
} else if (match) {
if (!clb_data->schemas[match - 1].submodules) {
WRN("Session %u: Unable to identify revision of the requested submodule \"%s\", in schema \"%s\", from the available server side information.",
clb_data->session->id, submod_name, mod_name);
} else {
for (v = 0; clb_data->schemas[match - 1].submodules[v].name; ++v) {
if (!strcmp(submod_name, clb_data->schemas[match - 1].submodules[v].name)) {
rev = sub_rev = clb_data->schemas[match - 1].submodules[v].revision;
}
}
if (!rev) {
ERR("Session %u: requested submodule \"%s\" is not known for schema \"%s\" on server side.",
clb_data->session->id, submod_name, mod_name);
return NULL;
}
}
}
} else {
name = mod_name;
rev = mod_rev;
}
VRB("Session %u: retreiving data for schema \"%s\", revision \"%s\".", clb_data->session->id, name, rev);
if (match) {
/* we have enough information to avoid communication with server and try to get
* the schema locally */
/* 1. try to get data locally */
model_data = retrieve_schema_data_localfile(name, rev, clb_data, format);
/* 2. try to use <get-schema> */
if (!model_data && clb_data->has_get_schema) {
model_data = retrieve_schema_data_getschema(name, rev, clb_data, format);
}
} else {
/* we are unsure which revision of the schema we should load, so first try to get
* the newest revision from the server via get-schema and only if the server does not
* implement get-schema, try to load the newest revision locally. This is imperfect
* solution, but there are situation when a client does not know what revision is
* actually implemented by the server. */
/* 1. try to use <get-schema> */
if (clb_data->has_get_schema) {
model_data = retrieve_schema_data_getschema(name, rev, clb_data, format);
}
/* 2. try to get data locally */
if (!model_data) {
model_data = retrieve_schema_data_localfile(name, rev, clb_data, format);
}
}
/* 3. try to use user callback */
if (!model_data && clb_data->user_clb) {
VRB("Session %u: reading schema via user callback.", clb_data->session->id);
return clb_data->user_clb(mod_name, mod_rev, submod_name, sub_rev, clb_data->user_data, format, free_module_data);
}
*free_module_data = free_with_user_data;
return model_data;
}
static int
nc_ctx_load_module(struct nc_session *session, const char *name, const char *revision, struct schema_info *schemas,
ly_module_imp_clb user_clb, void *user_data, int has_get_schema, const struct lys_module **mod)
{
int ret = 0;
struct ly_err_item *eitem;
const char *module_data = NULL;
LYS_INFORMAT format;
void (*free_module_data)(void*, void*) = NULL;
struct clb_data_s clb_data;
*mod = NULL;
if (revision) {
*mod = ly_ctx_get_module(session->ctx, name, revision, 0);
}
if (*mod) {
if (!(*mod)->implemented) {
/* make the present module implemented */
if (lys_set_implemented(*mod)) {
ERR("Failed to implement model \"%s\".", (*mod)->name);
ret = -1;
}
}
} else {
/* missing implemented module, load it ... */
clb_data.has_get_schema = has_get_schema;
clb_data.schemas = schemas;
clb_data.session = session;
clb_data.user_clb = user_clb;
clb_data.user_data = user_data;
/* clear all the errors and just collect them for now */
ly_err_clean(session->ctx, NULL);
ly_log_options(LY_LOSTORE);
/* get module data */
module_data = retrieve_schema_data(name, revision, NULL, NULL, &clb_data, &format, &free_module_data);
if (module_data) {
/* parse the schema */
ly_ctx_set_module_imp_clb(session->ctx, retrieve_schema_data, &clb_data);
*mod = lys_parse_mem(session->ctx, module_data, format);
if (*free_module_data) {
(*free_module_data)((char*)module_data, user_data);
}
ly_ctx_set_module_imp_clb(session->ctx, NULL, NULL);
}
/* restore logging options, then print errors on definite failure */
ly_log_options(LY_LOLOG | LY_LOSTORE_LAST);
if (!(*mod)) {
for (eitem = ly_err_first(session->ctx); eitem && eitem->next; eitem = eitem->next) {
ly_err_print(eitem);
}
ret = -1;
} else {
/* print only warnings */
for (eitem = ly_err_first(session->ctx); eitem && eitem->next; eitem = eitem->next) {
if (eitem->level == LY_LLWRN) {
ly_err_print(eitem);
}
}
}
/* clean the errors */
ly_err_clean(session->ctx, NULL);
}
return ret;
}
static void
free_schema_info(struct schema_info *list)
{
unsigned int u, v;
if (!list) {
return;
}
for (u = 0; list[u].name; ++u) {
free(list[u].name);
free(list[u].revision);
for (v = 0; v < list[u].features.number; ++v) {
free(list[u].features.set.g[v]);
}
free(list[u].features.set.g);
if (list[u].submodules) {
for (v = 0; list[u].submodules[v].name; ++v) {
free(list[u].submodules[v].name);
free(list[u].submodules[v].revision);
}
free(list[u].submodules);
}
}
free(list);
}
static int
build_schema_info_yl(struct nc_session *session, struct schema_info **result)
{
struct nc_rpc *rpc = NULL;
struct nc_reply *reply = NULL;
struct nc_reply_error *error_rpl;
struct lyd_node *yldata = NULL;
NC_MSG_TYPE msg;
uint64_t msgid;
struct ly_set *modules = NULL;
unsigned int u, v, submodules_count;
struct lyd_node *iter, *child;
struct lys_module *mod;
int ret = EXIT_SUCCESS;
/* get yang-library data from the server */
if (nc_session_cpblt(session, "urn:ietf:params:netconf:capability:xpath:1.0")) {
rpc = nc_rpc_get("/ietf-yang-library:*", 0, NC_PARAMTYPE_CONST);
} else {
rpc = nc_rpc_get("<modules-state xmlns=\"urn:ietf:params:xml:ns:yang:ietf-yang-library\"/>", 0, NC_PARAMTYPE_CONST);
}
if (!rpc) {
goto cleanup;
}
while ((msg = nc_send_rpc(session, rpc, 0, &msgid)) == NC_MSG_WOULDBLOCK) {
usleep(1000);
}
if (msg == NC_MSG_ERROR) {
WRN("Session %u: failed to send request for yang-library data.",
session->id);
goto cleanup;
}
do {
msg = nc_recv_reply(session, rpc, msgid, NC_READ_ACT_TIMEOUT * 1000, 0, &reply);
} while (msg == NC_MSG_NOTIF || msg == NC_MSG_REPLY_ERR_MSGID);
if (msg == NC_MSG_WOULDBLOCK) {
WRN("Session %u: timeout for receiving reply to a <get> yang-library data expired.", session->id);
goto cleanup;
} else if (msg == NC_MSG_ERROR || reply == NULL) {
WRN("Session %u: failed to receive a reply to <get> of yang-library data.", session->id);
goto cleanup;
}
switch (reply->type) {
case NC_RPL_OK:
WRN("Session %u: unexpected reply OK to a yang-library <get> RPC.", session->id);
goto cleanup;
case NC_RPL_DATA:
/* fine */
break;
case NC_RPL_ERROR:
error_rpl = (struct nc_reply_error *)reply;
if (error_rpl->count) {
WRN("Session %u: error reply to a yang-library <get> RPC (tag \"%s\", message \"%s\").",
session->id, error_rpl->err[0].tag, error_rpl->err[0].message);
} else {
WRN("Session %u: unexpected reply error to a yang-library <get> RPC.", session->id);
}
goto cleanup;
case NC_RPL_NOTIF:
WRN("Session %u: unexpected reply notification to a yang-library <get> RPC.", session->id);
goto cleanup;
}
yldata = ((struct nc_reply_data *)reply)->data;
if (!yldata || strcmp(yldata->schema->module->name, "ietf-yang-library")) {
WRN("Session %u: unexpected data in reply to a yang-library <get> RPC.", session->id);
goto cleanup;
}
modules = lyd_find_path(yldata, "/ietf-yang-library:modules-state/module");
if (!modules) {
WRN("Session %u: no module information in reply to a yang-library <get> RPC.", session->id);
goto cleanup;
}
(*result) = calloc(modules->number + 1, sizeof **result);
if (!(*result)) {
ERRMEM;
ret = EXIT_FAILURE;
goto cleanup;
}
for (u = 0; u < modules->number; ++u) {
submodules_count = 0;
mod = ((struct lyd_node *)modules->set.d[u])->schema->module;
LY_TREE_FOR(modules->set.d[u]->child, iter) {
if (iter->schema->module != mod) {
/* ignore node from other schemas (augments) */
continue;
}
if (!((struct lyd_node_leaf_list *)iter)->value_str || !((struct lyd_node_leaf_list *)iter)->value_str[0]) {
/* ignore empty nodes */
continue;
}
if (!strcmp(iter->schema->name, "name")) {
(*result)[u].name = strdup(((struct lyd_node_leaf_list *)iter)->value_str);
} else if (!strcmp(iter->schema->name, "revision")) {
(*result)[u].revision = strdup(((struct lyd_node_leaf_list *)iter)->value_str);
} else if (!strcmp(iter->schema->name, "conformance-type")) {
(*result)[u].implemented = !strcmp(((struct lyd_node_leaf_list *)iter)->value_str, "implement");
} else if (!strcmp(iter->schema->name, "feature")) {
ly_set_add(&(*result)[u].features, (void *)strdup(((struct lyd_node_leaf_list *)iter)->value_str), LY_SET_OPT_USEASLIST);
} else if (!strcmp(iter->schema->name, "submodule")) {
submodules_count++;
}
}
if (submodules_count) {
(*result)[u].submodules = calloc(submodules_count + 1, sizeof *(*result)[u].submodules);
if (!(*result)[u].submodules) {
ERRMEM;
free_schema_info(*result);
*result = NULL;
ret = EXIT_FAILURE;
goto cleanup;
} else {
v = 0;
LY_TREE_FOR(modules->set.d[u]->child, iter) {
mod = ((struct lyd_node *)modules->set.d[u])->schema->module;
if (mod == iter->schema->module && !strcmp(iter->schema->name, "submodule")) {
LY_TREE_FOR(iter->child, child) {
if (mod != child->schema->module) {
continue;
} else if (!strcmp(child->schema->name, "name")) {
(*result)[u].submodules[v].name = strdup(((struct lyd_node_leaf_list *)child)->value_str);
} else if (!strcmp(child->schema->name, "revision")) {
(*result)[u].submodules[v].name = strdup(((struct lyd_node_leaf_list *)child)->value_str);
}
}
}
}
}
}
}
cleanup:
nc_rpc_free(rpc);
nc_reply_free(reply);
ly_set_free(modules);
if (session->status != NC_STATUS_RUNNING) {
/* something bad heppened, discard the session */
ERR("Session %d: invalid session, discarding.", nc_session_get_id(session));
ret = EXIT_FAILURE;
}
return ret;
}
static int
build_schema_info_cpblts(char **cpblts, struct schema_info **result)
{
unsigned int u, v;
char *module_cpblt, *ptr, *ptr2;
for (u = 0; cpblts[u]; ++u);
(*result) = calloc(u + 1, sizeof **result);
if (!(*result)) {
ERRMEM;
return EXIT_FAILURE;
}
for (u = v = 0; cpblts[u]; ++u) {
module_cpblt = strstr(cpblts[u], "module=");
/* this capability requires a module */
if (!module_cpblt) {
continue;
}
/* get module's name */
ptr = (char *)module_cpblt + 7;
ptr2 = strchr(ptr, '&');
if (!ptr2) {
ptr2 = ptr + strlen(ptr);
}
(*result)[v].name = strndup(ptr, ptr2 - ptr);
/* get module's revision */
ptr = strstr(module_cpblt, "revision=");
if (ptr) {
ptr += 9;
ptr2 = strchr(ptr, '&');
if (!ptr2) {
ptr2 = ptr + strlen(ptr);
}
(*result)[v].revision = strndup(ptr, ptr2 - ptr);
}
/* all are implemented since there is no better information in capabilities list */
(*result)[v].implemented = 1;
/* get module's features */
ptr = strstr(module_cpblt, "features=");
if (ptr) {
ptr += 9;
for (ptr2 = ptr; *ptr && *ptr != '&'; ++ptr) {
if (*ptr == ',') {
ly_set_add(&(*result)[v].features, (void *)strndup(ptr2, ptr - ptr2), LY_SET_OPT_USEASLIST);
ptr2 = ptr + 1;
}
}
/* the last one */
ly_set_add(&(*result)[v].features, (void *)strndup(ptr2, ptr - ptr2), LY_SET_OPT_USEASLIST);
}
++v;
}
return EXIT_SUCCESS;
}
static int
nc_ctx_fill(struct nc_session *session, struct schema_info *modules, ly_module_imp_clb user_clb, void *user_data, int has_get_schema)
{
int ret = EXIT_FAILURE;
const struct lys_module *mod;
unsigned int u, v;
for (u = 0; modules[u].name; ++u) {
/* skip import-only modules */
if (!modules[u].implemented) {
continue;
}
/* we can continue even if it fails */
nc_ctx_load_module(session, modules[u].name, modules[u].revision, modules, user_clb, user_data, has_get_schema, &mod);
if (!mod) {
if (session->status != NC_STATUS_RUNNING) {
/* something bad heppened, discard the session */
ERR("Session %d: invalid session, discarding.", nc_session_get_id(session));
goto cleanup;
}
/* all loading ways failed, the schema will be ignored in the received data */
WRN("Failed to load schema \"%s@%s\".", modules[u].name, modules[u].revision ? modules[u].revision : "<latest>");
session->flags |= NC_SESSION_CLIENT_NOT_STRICT;
} else {
/* set features - first disable all to enable specified then */
lys_features_disable(mod, "*");
for (v = 0; v < modules[u].features.number; v++) {
lys_features_enable(mod, (const char*)modules[u].features.set.g[v]);
}
}
}
/* done */
ret = EXIT_SUCCESS;
cleanup:
return ret;
}
static int
nc_ctx_fill_ietf_netconf(struct nc_session *session, struct schema_info *modules, ly_module_imp_clb user_clb, void *user_data, int has_get_schema)
{
unsigned int u, v;
const struct lys_module *ietfnc;
ietfnc = ly_ctx_get_module(session->ctx, "ietf-netconf", NULL, 1);
if (!ietfnc) {
nc_ctx_load_module(session, "ietf-netconf", NULL, modules, user_clb, user_data, has_get_schema, &ietfnc);
if (!ietfnc) {
ietfnc = lys_parse_mem(session->ctx, ietf_netconf_2013_09_29_yang, LYS_YANG);
}
}
if (!ietfnc) {
ERR("Loading base NETCONF schema failed.");
return 1;
}
/* set supported capabilities from ietf-netconf */
for (u = 0; modules[u].name; ++u) {
if (strcmp(modules[u].name, "ietf-netconf") || !modules[u].implemented) {
continue;
}
lys_features_disable(ietfnc, "*");
for (v = 0; v < modules[u].features.number; v++) {
lys_features_enable(ietfnc, (const char*)modules[u].features.set.g[v]);
}
}
return 0;
}
int
nc_ctx_check_and_fill(struct nc_session *session)
{
int i, get_schema_support = 0, yanglib_support = 0, ret = -1;
ly_module_imp_clb old_clb = NULL;
void *old_data = NULL;
const struct lys_module *mod = NULL;
char *revision;
struct schema_info *server_modules = NULL, *sm = NULL;
assert(session->opts.client.cpblts && session->ctx);
/* store the original user's callback, we will be switching between local search, get-schema and user callback */
old_clb = ly_ctx_get_module_imp_clb(session->ctx, &old_data);
/* switch off default searchpath to use only our callback integrating modifying searchpath algorithm to limit
* schemas only to those present on the server side */
ly_ctx_set_disable_searchdirs(session->ctx);
/* our callback is set later with appropriate data */
ly_ctx_set_module_imp_clb(session->ctx, NULL, NULL);
/* check if get-schema and yang-library is supported */
for (i = 0; session->opts.client.cpblts[i]; ++i) {
if (!strncmp(session->opts.client.cpblts[i], "urn:ietf:params:xml:ns:yang:ietf-netconf-monitoring?", 52)) {
get_schema_support = 1 + i;
if (yanglib_support) {
break;
}
} else if (!strncmp(session->opts.client.cpblts[i], "urn:ietf:params:netconf:capability:yang-library:", 48)) {
yanglib_support = 1 + i;
if (get_schema_support) {
break;
}
}
}
if (get_schema_support) {
VRB("Session %u: capability for <get-schema> support found.", session->id);
} else {
VRB("Session %u: capability for <get-schema> support not found.", session->id);
}
if (yanglib_support) {
VRB("Session %u: capability for yang-library support found.", session->id);
} else {
VRB("Session %u: capability for yang-library support not found.", session->id);
}
/* get information about server's schemas from capabilities list until we will have yang-library */
if (build_schema_info_cpblts(session->opts.client.cpblts, &server_modules) || !server_modules) {
ERR("Session %u: unable to get server's schema information from the <hello>'s capabilities.", session->id);
goto cleanup;
}
/* get-schema is supported, load local ietf-netconf-monitoring so we can create <get-schema> RPCs */
if (get_schema_support && !lys_parse_mem(session->ctx, ietf_netconf_monitoring_2010_10_04_yang, LYS_YANG)) {
WRN("Session %u: loading NETCONF monitoring schema failed, cannot use <get-schema>.", session->id);
get_schema_support = 0;
}
/* load base model disregarding whether it's in capabilities (but NETCONF capabilities are used to enable features) */
if (nc_ctx_fill_ietf_netconf(session, server_modules, old_clb, old_data, get_schema_support)) {
goto cleanup;
}
/* get correct version of ietf-yang-library into context */
if (yanglib_support) {
/* use get schema to get server's ietf-yang-library */
revision = strstr(session->opts.client.cpblts[yanglib_support - 1], "revision=");
if (!revision) {
WRN("Session %u: loading NETCONF ietf-yang-library schema failed, missing revision in NETCONF <hello> message.", session->id);
WRN("Session %u: unable to automatically use <get-schema>.", session->id);
yanglib_support = 0;
} else {
revision = strndup(&revision[9], 10);
if (nc_ctx_load_module(session, "ietf-yang-library", revision, server_modules, old_clb, old_data,
get_schema_support, &mod)) {
WRN("Session %u: loading NETCONF ietf-yang-library schema failed, unable to use it to learn all the supported modules.",
session->id);
yanglib_support = 0;
}
if (strcmp(revision, "2019-01-04") >= 0) {
/* we also need ietf-datastores to be implemented */
if (nc_ctx_load_module(session, "ietf-datastores", NULL, server_modules, old_clb, old_data,
get_schema_support, &mod)) {
WRN("Session %u: loading NETCONF ietf-datastores schema failed, unable to use yang-library"
" to learn all the supported modules.", session->id);
yanglib_support = 0;
}
}
free(revision);
}
}
/* prepare structured information about server's schemas */
if (yanglib_support) {
if (build_schema_info_yl(session, &sm)) {
goto cleanup;
} else if (!sm) {
VRB("Session %u: trying to use capabilities instead of ietf-yang-library data.", session->id);
} else {
/* prefer yang-library information, currently we have it from capabilities used for getting correct yang-library schema */
free_schema_info(server_modules);
server_modules = sm;
}
}
if (nc_ctx_fill(session, server_modules, old_clb, old_data, get_schema_support)) {
goto cleanup;
}
/* succsess */
ret = 0;
if (session->flags & NC_SESSION_CLIENT_NOT_STRICT) {
WRN("Session %u: some models failed to be loaded, any data from these models (and any other unknown) will be ignored.", session->id);
}
cleanup:
free_schema_info(server_modules);
/* set user callback back */
ly_ctx_set_module_imp_clb(session->ctx, old_clb, old_data);
ly_ctx_unset_disable_searchdirs(session->ctx);
return ret;
}
API struct nc_session *
nc_connect_inout(int fdin, int fdout, struct ly_ctx *ctx)
{
struct nc_session *session;
if (fdin < 0) {
ERRARG("fdin");
return NULL;
} else if (fdout < 0) {
ERRARG("fdout");
return NULL;
}
/* prepare session structure */
session = nc_new_session(NC_CLIENT, 0);
if (!session) {
ERRMEM;
return NULL;
}
session->status = NC_STATUS_STARTING;
/* transport specific data */
session->ti_type = NC_TI_FD;
session->ti.fd.in = fdin;
session->ti.fd.out = fdout;
if (nc_session_new_ctx(session, ctx) != EXIT_SUCCESS) {
goto fail;
}
ctx = session->ctx;
/* NETCONF handshake */
if (nc_handshake_io(session) != NC_MSG_HELLO) {
goto fail;
}
session->status = NC_STATUS_RUNNING;
if (nc_ctx_check_and_fill(session) == -1) {
goto fail;
}
return session;
fail:
nc_session_free(session, NULL);
return NULL;
}
API struct nc_session *
nc_connect_unix(const char *address, struct ly_ctx *ctx)
{
struct nc_session *session = NULL;
struct sockaddr_un sun;
const struct passwd *pw;
char *username;
int sock = -1;
if (address == NULL) {
ERRARG("address");
return NULL;
}
pw = getpwuid(geteuid());
if (pw == NULL) {
ERR("Failed to find username for euid=%u.\n", geteuid());
goto fail;
}
sock = socket(AF_UNIX, SOCK_STREAM, 0);
if (sock < 0) {
ERR("Failed to create socket (%s).", strerror(errno));
goto fail;
}
memset(&sun, 0, sizeof(sun));
sun.sun_family = AF_UNIX;
snprintf(sun.sun_path, sizeof(sun.sun_path), "%s", address);
if (connect(sock, (struct sockaddr *)&sun, sizeof(sun)) < 0) {
ERR("cannot connect to sock server %s (%s)",
address, strerror(errno));
goto fail;
}
if (fcntl(sock, F_SETFL, O_NONBLOCK) < 0) {
ERR("Fcntl failed (%s).", strerror(errno));
goto fail;
}
/* prepare session structure */
session = nc_new_session(NC_CLIENT, 0);
if (!session) {
ERRMEM;
goto fail;
}
session->status = NC_STATUS_STARTING;
/* transport specific data */
session->ti_type = NC_TI_UNIX;
session->ti.unixsock.sock = sock;
sock = -1; /* do not close sock in fail label anymore */
if (nc_session_new_ctx(session, ctx) != EXIT_SUCCESS) {
goto fail;
}
ctx = session->ctx;
session->path = lydict_insert(ctx, address, 0);
username = strdup(pw->pw_name);
if (username == NULL) {
ERRMEM;
goto fail;
}
session->username = lydict_insert_zc(ctx, username);
/* NETCONF handshake */
if (nc_handshake_io(session) != NC_MSG_HELLO) {
goto fail;
}
session->status = NC_STATUS_RUNNING;
if (nc_ctx_check_and_fill(session) == -1) {
goto fail;
}
return session;
fail:
nc_session_free(session, NULL);
if (sock >= 0)
close(sock);
return NULL;
}
/*
Helper for a non-blocking connect (which is required because of the locking
concept for e.g. call home settings). For more details see nc_sock_connect().
*/
static int
_non_blocking_connect(int timeout, int *sock_pending, struct addrinfo *res, struct nc_keepalives *ka)
{
int flags, ret, error;
int sock = -1;
fd_set wset;
struct timeval ts;
socklen_t len = sizeof(int);
struct in_addr *addr;
uint16_t port;
char str[INET6_ADDRSTRLEN];
if (sock_pending && *sock_pending != -1) {
VRB("Trying to connect the pending socket=%d.", *sock_pending );
sock = *sock_pending;
} else {
assert(res);
if (res->ai_family == AF_INET6) {
addr = (struct in_addr *) &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
port = ntohs(((struct sockaddr_in6 *)res->ai_addr)->sin6_port);
} else {
addr = &((struct sockaddr_in *)res->ai_addr)->sin_addr;
port = ntohs(((struct sockaddr_in *)res->ai_addr)->sin_port);
}
if (!inet_ntop(res->ai_family, addr, str, res->ai_addrlen)) {
WRN("inet_ntop() failed (%s).", strerror(errno));
} else {
VRB("Trying to connect via %s to %s:%u.", (res->ai_family == AF_INET6) ? "IPv6" : "IPv4", str, port);
}
/* connect to a server */
sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (sock == -1) {
ERR("Socket could not be created (%s).", strerror(errno));
return -1;
}
/* make the socket non-blocking */
if (((flags = fcntl(sock, F_GETFL)) == -1) || (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1)) {
ERR("fcntl() failed (%s).", strerror(errno));
goto cleanup;
}
/* non-blocking connect! */
if (connect(sock, res->ai_addr, res->ai_addrlen) < 0) {
if (errno != EINPROGRESS) {
/* network connection failed, try another resource */
ERR("connect() failed (%s).", strerror(errno));
goto cleanup;
}
}
}
ts.tv_sec = timeout;
ts.tv_usec = 0;
FD_ZERO(&wset);
FD_SET(sock, &wset);
if ((ret = select(sock + 1, NULL, &wset, NULL, (timeout != -1) ? &ts : NULL)) < 0) {
ERR("select() failed (%s).", strerror(errno));
goto cleanup;
}
if (ret == 0) {
/* there was a timeout */
VRB("Timed out after %ds (%s).", timeout, strerror(errno));
if (sock_pending) {
/* no sock-close, we'll try it again */
*sock_pending = sock;
} else {
close(sock);
}
return -1;
}
/* check the usability of the socket */
error = 0;
if (getsockopt(sock, SOL_SOCKET, SO_ERROR, &error, &len) < 0) {
ERR("getsockopt() failed (%s).", strerror(errno));
goto cleanup;
}
if (error) {
/* network connection failed, try another resource */
VRB("getsockopt() error (%s).", strerror(error));
errno = error;
goto cleanup;
}
/* enable keep-alive */
if (nc_sock_enable_keepalive(sock, ka)) {
goto cleanup;
}
return sock;
cleanup:
if (sock_pending) {
*sock_pending = -1;
}
close(sock);
return -1;
}
/* A given timeout value limits the time how long the function blocks. If it has to block
only for some seconds, a socket connection might not yet have been fully established.
Therefore the active (pending) socket will be stored in *sock_pending, but the return
value will be -1. In such a case a subsequent invokation is required, by providing the
stored sock_pending, again.
In general, if this function returns -1, when a timeout has been given, this function
has to be invoked, until it returns a valid socket.
*/
int
nc_sock_connect(const char *host, uint16_t port, int timeout, struct nc_keepalives *ka, int *sock_pending, char **ip_host)
{
int i, opt;
int sock = sock_pending ? *sock_pending : -1;
struct addrinfo hints, *res_list, *res;
char *buf, port_s[6]; /* length of string representation of short int */
void *addr;
DBG("nc_sock_connect(%s, %u, %d, %d)", host, port, timeout, sock);
/* no pending socket */
if (sock == -1) {
/* connect to a server */
snprintf(port_s, 6, "%u", port);
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
i = getaddrinfo(host, port_s, &hints, &res_list);
if (i != 0) {
ERR("Unable to translate the host address (%s).", gai_strerror(i));
goto error;
}
for (res = res_list; res != NULL; res = res->ai_next) {
sock = _non_blocking_connect(timeout, sock_pending, res, ka);
if (sock == -1) {
if (!sock_pending || *sock_pending == -1) {
/* try the next resource */
continue;
} else {
/* timeout, keep pending socket */
return -1;
}
}
VRB("Successfully connected to %s:%s over %s.", host, port_s, (res->ai_family == AF_INET6) ? "IPv6" : "IPv4");
opt = 1;
if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof opt) == -1) {
ERR("Could not set TCP_NODELAY socket option (%s).", strerror(errno));
goto error;
}
if (ip_host && ((res->ai_family == AF_INET6) || (res->ai_family == AF_INET))) {
buf = malloc(INET6_ADDRSTRLEN);
if (!buf) {
ERRMEM;
goto error;
}
if (res->ai_family == AF_INET) {
addr = &((struct sockaddr_in *)res->ai_addr)->sin_addr;
} else {
addr = &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
}
if (!inet_ntop(res->ai_family, addr, buf, INET6_ADDRSTRLEN)) {
ERR("Converting host to IP address failed (%s).", strerror(errno));
free(buf);
goto error;
}
*ip_host = buf;
}
break;
}
freeaddrinfo(res_list);
} else {
/* try to get a connection with the pending socket */
assert(sock_pending);
sock = _non_blocking_connect(timeout, sock_pending, NULL, ka);
}
return sock;
error:
if (sock != -1) {
close(sock);
}
if (sock_pending) {
*sock_pending = -1;
}
return -1;
}
static NC_MSG_TYPE
get_msg(struct nc_session *session, int timeout, uint64_t msgid, struct lyxml_elem **msg)
{
char *ptr;
const char *str_msgid;
uint64_t cur_msgid;
struct lyxml_elem *xml;
struct nc_msg_cont *cont, **cont_ptr;
NC_MSG_TYPE msgtype = 0; /* NC_MSG_ERROR */
/* try to get notification from the session's queue */
if (!msgid && session->opts.client.notifs) {
cont = session->opts.client.notifs;
session->opts.client.notifs = cont->next;
xml = cont->msg;
free(cont);
msgtype = NC_MSG_NOTIF;
}
/* try to get rpc-reply from the session's queue */
if (msgid && session->opts.client.replies) {
cont = session->opts.client.replies;
session->opts.client.replies = cont->next;
xml = cont->msg;
free(cont);
msgtype = NC_MSG_REPLY;
}
if (!msgtype) {
/* read message from wire */
msgtype = nc_read_msg_poll_io(session, timeout, &xml);
}
/* we read rpc-reply, want a notif */
if (!msgid && (msgtype == NC_MSG_REPLY)) {
cont_ptr = &session->opts.client.replies;
while (*cont_ptr) {
cont_ptr = &((*cont_ptr)->next);
}
*cont_ptr = malloc(sizeof **cont_ptr);
if (!*cont_ptr) {
ERRMEM;
lyxml_free(session->ctx, xml);
return NC_MSG_ERROR;
}
(*cont_ptr)->msg = xml;
(*cont_ptr)->next = NULL;
}
/* we read notif, want a rpc-reply */
if (msgid && (msgtype == NC_MSG_NOTIF)) {
if (!session->opts.client.ntf_tid) {
ERR("Session %u: received a <notification> but session is not subscribed.", session->id);
lyxml_free(session->ctx, xml);
return NC_MSG_ERROR;
}
cont_ptr = &session->opts.client.notifs;
while (*cont_ptr) {
cont_ptr = &((*cont_ptr)->next);
}
*cont_ptr = malloc(sizeof **cont_ptr);
if (!*cont_ptr) {
ERRMEM;
lyxml_free(session->ctx, xml);
return NC_MSG_ERROR;
}
(*cont_ptr)->msg = xml;
(*cont_ptr)->next = NULL;
}
switch (msgtype) {
case NC_MSG_NOTIF:
if (!msgid) {
*msg = xml;
}
break;
case NC_MSG_REPLY:
if (msgid) {
/* check message-id */
str_msgid = lyxml_get_attr(xml, "message-id", NULL);
if (!str_msgid) {
WRN("Session %u: received a <rpc-reply> without a message-id.", session->id);
} else {
cur_msgid = strtoul(str_msgid, &ptr, 10);
if (cur_msgid != msgid) {
ERR("Session %u: received a <rpc-reply> with an unexpected message-id \"%s\".",
session->id, str_msgid);
msgtype = NC_MSG_REPLY_ERR_MSGID;
}
}
*msg = xml;
}
break;
case NC_MSG_HELLO:
ERR("Session %u: received another <hello> message.", session->id);
lyxml_free(session->ctx, xml);
msgtype = NC_MSG_ERROR;
break;
case NC_MSG_RPC:
ERR("Session %u: received <rpc> from a NETCONF server.", session->id);
lyxml_free(session->ctx, xml);
msgtype = NC_MSG_ERROR;
break;
default:
/* NC_MSG_WOULDBLOCK and NC_MSG_ERROR - pass it out;
* NC_MSG_NONE is not returned by nc_read_msg()
*/
break;
}
return msgtype;
}
/* cannot strictly fail, but does not need to fill any error parameter at all */
static void
parse_rpc_error(struct ly_ctx *ctx, struct lyxml_elem *xml, struct nc_err *err)
{
struct lyxml_elem *iter, *next, *info;
LY_TREE_FOR(xml->child, iter) {
if (!iter->ns) {
if (iter->content) {
WRN("<rpc-error> child \"%s\" with value \"%s\" without namespace.", iter->name, iter->content);
} else {
WRN("<rpc-error> child \"%s\" without namespace.", iter->name);
}
continue;
} else if (strcmp(iter->ns->value, NC_NS_BASE)) {
if (iter->content) {
WRN("<rpc-error> child \"%s\" with value \"%s\" in an unknown namespace \"%s\".",
iter->name, iter->content, iter->ns->value);
} else {
WRN("<rpc-error> child \"%s\" in an unknown namespace \"%s\".", iter->name, iter->ns->value);
}
continue;
}
if (!strcmp(iter->name, "error-type")) {
if (!iter->content || (strcmp(iter->content, "transport") && strcmp(iter->content, "rpc")
&& strcmp(iter->content, "protocol") && strcmp(iter->content, "application"))) {
WRN("<rpc-error> <error-type> unknown value \"%s\".", (iter->content ? iter->content : ""));
} else if (err->type) {
WRN("<rpc-error> <error-type> duplicated.");
} else {
err->type = lydict_insert(ctx, iter->content, 0);
}
} else if (!strcmp(iter->name, "error-tag")) {
if (!iter->content || (strcmp(iter->content, "in-use") && strcmp(iter->content, "invalid-value")
&& strcmp(iter->content, "too-big") && strcmp(iter->content, "missing-attribute")
&& strcmp(iter->content, "bad-attribute") && strcmp(iter->content, "unknown-attribute")
&& strcmp(iter->content, "missing-element") && strcmp(iter->content, "bad-element")
&& strcmp(iter->content, "unknown-element") && strcmp(iter->content, "unknown-namespace")
&& strcmp(iter->content, "access-denied") && strcmp(iter->content, "lock-denied")
&& strcmp(iter->content, "resource-denied") && strcmp(iter->content, "rollback-failed")
&& strcmp(iter->content, "data-exists") && strcmp(iter->content, "data-missing")
&& strcmp(iter->content, "operation-not-supported") && strcmp(iter->content, "operation-failed")
&& strcmp(iter->content, "malformed-message"))) {
WRN("<rpc-error> <error-tag> unknown value \"%s\".", (iter->content ? iter->content : ""));
} else if (err->tag) {
WRN("<rpc-error> <error-tag> duplicated.");
} else {
err->tag = lydict_insert(ctx, iter->content, 0);
}
} else if (!strcmp(iter->name, "error-severity")) {
if (!iter->content || (strcmp(iter->content, "error") && strcmp(iter->content, "warning"))) {
WRN("<rpc-error> <error-severity> unknown value \"%s\".", (iter->content ? iter->content : ""));
} else if (err->severity) {
WRN("<rpc-error> <error-severity> duplicated.");
} else {
err->severity = lydict_insert(ctx, iter->content, 0);
}
} else if (!strcmp(iter->name, "error-app-tag")) {
if (err->apptag) {
WRN("<rpc-error> <error-app-tag> duplicated.");
} else {
err->apptag = lydict_insert(ctx, (iter->content ? iter->content : ""), 0);
}
} else if (!strcmp(iter->name, "error-path")) {
if (err->path) {
WRN("<rpc-error> <error-path> duplicated.");
} else {
err->path = lydict_insert(ctx, (iter->content ? iter->content : ""), 0);
}
} else if (!strcmp(iter->name, "error-message")) {
if (err->message) {
WRN("<rpc-error> <error-message> duplicated.");
} else {
err->message_lang = lyxml_get_attr(iter, "xml:lang", NULL);
if (err->message_lang) {
err->message_lang = lydict_insert(ctx, err->message_lang, 0);
} else {
VRB("<rpc-error> <error-message> without the recommended \"xml:lang\" attribute.");
}
err->message = lydict_insert(ctx, (iter->content ? iter->content : ""), 0);
}
} else if (!strcmp(iter->name, "error-info")) {
LY_TREE_FOR_SAFE(iter->child, next, info) {
if (info->ns && !strcmp(info->ns->value, NC_NS_BASE)) {
if (!strcmp(info->name, "session-id")) {
if (err->sid) {
WRN("<rpc-error> <error-info> <session-id> duplicated.");
} else {
err->sid = lydict_insert(ctx, (info->content ? info->content : ""), 0);
}
} else if (!strcmp(info->name, "bad-attribute")) {
++err->attr_count;
err->attr = nc_realloc(err->attr, err->attr_count * sizeof *err->attr);
if (!err->attr) {
ERRMEM;
return;
}
err->attr[err->attr_count - 1] = lydict_insert(ctx, (info->content ? info->content : ""), 0);
} else if (!strcmp(info->name, "bad-element")) {
++err->elem_count;
err->elem = nc_realloc(err->elem, err->elem_count * sizeof *err->elem);
if (!err->elem) {
ERRMEM;
return;
}
err->elem[err->elem_count - 1] = lydict_insert(ctx, (info->content ? info->content : ""), 0);
} else if (!strcmp(info->name, "bad-namespace")) {
++err->ns_count;
err->ns = nc_realloc(err->ns, err->ns_count * sizeof *err->ns);
if (!err->ns) {
ERRMEM;
return;
}
err->ns[err->ns_count - 1] = lydict_insert(ctx, (info->content ? info->content : ""), 0);
} else {
if (info->content) {
WRN("<rpc-error> <error-info> unknown child \"%s\" with value \"%s\".",
info->name, info->content);
} else {
WRN("<rpc-error> <error-info> unknown child \"%s\".", info->name);
}
}
} else {
lyxml_unlink(ctx, info);
++err->other_count;
err->other = nc_realloc(err->other, err->other_count * sizeof *err->other);
if (!err->other) {
ERRMEM;
return;
}
err->other[err->other_count - 1] = info;
}
}
} else {
if (iter->content) {
WRN("<rpc-error> unknown child \"%s\" with value \"%s\".", iter->name, iter->content);
} else {
WRN("<rpc-error> unknown child \"%s\".", iter->name);
}
}
}
}
static struct nc_reply *
parse_reply(struct ly_ctx *ctx, struct lyxml_elem *xml, struct nc_rpc *rpc, int parseroptions)
{
struct lyxml_elem *iter;
struct lyd_node *data = NULL, *rpc_act = NULL;
struct nc_client_reply_error *error_rpl;
struct nc_reply_data *data_rpl;
struct nc_reply *reply = NULL;
struct nc_rpc_act_generic *rpc_gen;
int i, data_parsed = 0;
/* rpc-error */
if (xml->child && !strcmp(xml->child->name, "rpc-error") && xml->child->ns && !strcmp(xml->child->ns->value, NC_NS_BASE)) {
/* count and check elements */
i = 0;
LY_TREE_FOR(xml->child, iter) {
if (strcmp(iter->name, "rpc-error")) {
ERR("<rpc-reply> content mismatch (<rpc-error> and <%s>).", iter->name);
return NULL;
} else if (!iter->ns) {
ERR("<rpc-reply> content mismatch (<rpc-error> without namespace).");
return NULL;
} else if (strcmp(iter->ns->value, NC_NS_BASE)) {
ERR("<rpc-reply> content mismatch (<rpc-error> with NS \"%s\").", iter->ns->value);
return NULL;
}
++i;
}
error_rpl = malloc(sizeof *error_rpl);
if (!error_rpl) {
ERRMEM;
return NULL;
}
error_rpl->type = NC_RPL_ERROR;
error_rpl->err = calloc(i, sizeof *error_rpl->err);
if (!error_rpl->err) {
ERRMEM;
free(error_rpl);
return NULL;
}
error_rpl->count = i;
error_rpl->ctx = ctx;
reply = (struct nc_reply *)error_rpl;
i = 0;
LY_TREE_FOR(xml->child, iter) {
parse_rpc_error(ctx, iter, error_rpl->err + i);
++i;
}
/* ok */
} else if (xml->child && !strcmp(xml->child->name, "ok") && xml->child->ns && !strcmp(xml->child->ns->value, NC_NS_BASE)) {
if (xml->child->next) {
ERR("<rpc-reply> content mismatch (<ok> and <%s>).", xml->child->next->name);
return NULL;
}
reply = malloc(sizeof *reply);
if (!reply) {
ERRMEM;
return NULL;
}
reply->type = NC_RPL_OK;
/* some RPC output */
} else {
switch (rpc->type) {
case NC_RPC_ACT_GENERIC:
rpc_gen = (struct nc_rpc_act_generic *)rpc;
if (rpc_gen->has_data) {
rpc_act = lyd_dup(rpc_gen->content.data, 1);
if (!rpc_act) {
ERR("Failed to duplicate a generic RPC/action.");
return NULL;
}
} else {
rpc_act = lyd_parse_mem(ctx, rpc_gen->content.xml_str, LYD_XML, LYD_OPT_RPC | parseroptions, NULL);
if (!rpc_act) {
ERR("Failed to parse a generic RPC/action XML.");
return NULL;
}
}
break;
case NC_RPC_GETCONFIG:
case NC_RPC_GET:
case NC_RPC_GETDATA:
/* we should definitely have received at least an empty "data" element even on empty reply, but fine */
if (!xml->child || !xml->child->child) {
/* we did not receive any data */
data_rpl = malloc(sizeof *data_rpl);
if (!data_rpl) {
ERRMEM;
return NULL;
}
data_rpl->type = NC_RPL_DATA;
data_rpl->data = NULL;
return (struct nc_reply *)data_rpl;
}
/* special treatment */
ly_errno = 0;
data = lyd_parse_xml(ctx, &xml->child->child,
LYD_OPT_DESTRUCT | (rpc->type == NC_RPC_GETCONFIG ? LYD_OPT_GETCONFIG : LYD_OPT_GET)
| parseroptions);
if (ly_errno) {
ERR("Failed to parse <%s> reply.", (rpc->type == NC_RPC_GETCONFIG ? "get-config" : "get"));
return NULL;
}
data_parsed = 1;
break;
case NC_RPC_GETSCHEMA:
rpc_act = lyd_new(NULL, ly_ctx_get_module(ctx, "ietf-netconf-monitoring", NULL, 1), "get-schema");
if (!rpc_act) {
ERRINT;
return NULL;
}
break;
case NC_RPC_EDIT:
case NC_RPC_COPY:
case NC_RPC_DELETE:
case NC_RPC_LOCK:
case NC_RPC_UNLOCK:
case NC_RPC_KILL:
case NC_RPC_COMMIT:
case NC_RPC_DISCARD:
case NC_RPC_CANCEL:
case NC_RPC_VALIDATE:
case NC_RPC_SUBSCRIBE:
case NC_RPC_EDITDATA:
/* there is no output defined */
ERR("Unexpected data reply (root elem \"%s\").", xml->child ? xml->child->name : NULL);
return NULL;
default:
ERRINT;
return NULL;
}
data_rpl = malloc(sizeof *data_rpl);
if (!data_rpl) {
ERRMEM;
return NULL;
}
data_rpl->type = NC_RPL_DATA;
ly_errno = 0;
if (!data_parsed) {
data_rpl->data = lyd_parse_xml(ctx, &xml->child, LYD_OPT_RPCREPLY | LYD_OPT_DESTRUCT | parseroptions,
rpc_act, NULL);
if (!ly_errno && !data_rpl->data->child) {
ERR("An empty data <rpc-reply>.");
lyd_free_withsiblings(rpc_act);
lyd_free(data_rpl->data);
free(data_rpl);
return NULL;
}
} else {
/* <get>, <get-config>, <get-data> */
data_rpl->data = data;
}
lyd_free_withsiblings(rpc_act);
if (ly_errno) {
ERR("Failed to parse <rpc-reply>.");
free(data_rpl);
return NULL;
}
reply = (struct nc_reply *)data_rpl;
}
return reply;
}
#if defined(NC_ENABLED_SSH) || defined(NC_ENABLED_TLS)
int
nc_client_ch_add_bind_listen(const char *address, uint16_t port, NC_TRANSPORT_IMPL ti)
{
int sock;
if (!address) {
ERRARG("address");
return -1;
} else if (!port) {
ERRARG("port");
return -1;
}
sock = nc_sock_listen_inet(address, port, &client_opts.ka);
if (sock == -1) {
return -1;
}
++client_opts.ch_bind_count;
client_opts.ch_binds = nc_realloc(client_opts.ch_binds, client_opts.ch_bind_count * sizeof *client_opts.ch_binds);
if (!client_opts.ch_binds) {
ERRMEM;
close(sock);
return -1;
}
client_opts.ch_bind_ti = nc_realloc(client_opts.ch_bind_ti, client_opts.ch_bind_count * sizeof *client_opts.ch_bind_ti);
if (!client_opts.ch_bind_ti) {
ERRMEM;
close(sock);
return -1;
}
client_opts.ch_bind_ti[client_opts.ch_bind_count - 1] = ti;
client_opts.ch_binds[client_opts.ch_bind_count - 1].address = strdup(address);
if (!client_opts.ch_binds[client_opts.ch_bind_count - 1].address) {
ERRMEM;
close(sock);
return -1;
}
client_opts.ch_binds[client_opts.ch_bind_count - 1].port = port;
client_opts.ch_binds[client_opts.ch_bind_count - 1].sock = sock;
client_opts.ch_binds[client_opts.ch_bind_count - 1].pollin = 0;
return 0;
}
int
nc_client_ch_del_bind(const char *address, uint16_t port, NC_TRANSPORT_IMPL ti)
{
uint32_t i;
int ret = -1;
if (!address && !port && !ti) {
for (i = 0; i < client_opts.ch_bind_count; ++i) {
close(client_opts.ch_binds[i].sock);
free((char *)client_opts.ch_binds[i].address);
ret = 0;
}
free(client_opts.ch_binds);
client_opts.ch_binds = NULL;
client_opts.ch_bind_count = 0;
} else {
for (i = 0; i < client_opts.ch_bind_count; ++i) {
if ((!address || !strcmp(client_opts.ch_binds[i].address, address))
&& (!port || (client_opts.ch_binds[i].port == port))
&& (!ti || (client_opts.ch_bind_ti[i] == ti))) {
close(client_opts.ch_binds[i].sock);
free((char *)client_opts.ch_binds[i].address);
--client_opts.ch_bind_count;
if (!client_opts.ch_bind_count) {
free(client_opts.ch_binds);
client_opts.ch_binds = NULL;
} else if (i < client_opts.ch_bind_count) {
memcpy(&client_opts.ch_binds[i], &client_opts.ch_binds[client_opts.ch_bind_count], sizeof *client_opts.ch_binds);
client_opts.ch_bind_ti[i] = client_opts.ch_bind_ti[client_opts.ch_bind_count];
}
ret = 0;
}
}
}
return ret;
}
API int
nc_accept_callhome(int timeout, struct ly_ctx *ctx, struct nc_session **session)
{
int sock;
char *host = NULL;
uint16_t port, idx;
if (!client_opts.ch_binds) {
ERRINIT;
return -1;
} else if (!session) {
ERRARG("session");
return -1;
}
sock = nc_sock_accept_binds(client_opts.ch_binds, client_opts.ch_bind_count, timeout, &host, &port, &idx);
if (sock < 1) {
free(host);
return sock;
}
#ifdef NC_ENABLED_SSH
if (client_opts.ch_bind_ti[idx] == NC_TI_LIBSSH) {
*session = nc_accept_callhome_ssh_sock(sock, host, port, ctx, NC_TRANSPORT_TIMEOUT);
} else
#endif
#ifdef NC_ENABLED_TLS
if (client_opts.ch_bind_ti[idx] == NC_TI_OPENSSL) {
*session = nc_accept_callhome_tls_sock(sock, host, port, ctx, NC_TRANSPORT_TIMEOUT);
} else
#endif
{
close(sock);
*session = NULL;
}
free(host);
if (!(*session)) {
return -1;
}
return 1;
}
#endif /* NC_ENABLED_SSH || NC_ENABLED_TLS */
API const char * const *
nc_session_get_cpblts(const struct nc_session *session)
{
if (!session) {
ERRARG("session");
return NULL;
}
return (const char * const *)session->opts.client.cpblts;
}
API const char *
nc_session_cpblt(const struct nc_session *session, const char *capab)
{
int i, len;
if (!session) {
ERRARG("session");
return NULL;
} else if (!capab) {
ERRARG("capab");
return NULL;
}
len = strlen(capab);
for (i = 0; session->opts.client.cpblts[i]; ++i) {
if (!strncmp(session->opts.client.cpblts[i], capab, len)) {
return session->opts.client.cpblts[i];
}
}
return NULL;
}
API int
nc_session_ntf_thread_running(const struct nc_session *session)
{
if (!session || (session->side != NC_CLIENT)) {
ERRARG("session");
return 0;
}
return session->opts.client.ntf_tid ? 1 : 0;
}
API void
nc_client_init(void)
{
nc_init();
}
API void
nc_client_destroy(void)
{
nc_client_set_schema_searchpath(NULL);
#if defined(NC_ENABLED_SSH) || defined(NC_ENABLED_TLS)
nc_client_ch_del_bind(NULL, 0, 0);
#endif
#ifdef NC_ENABLED_SSH
nc_client_ssh_destroy_opts();
#endif
#ifdef NC_ENABLED_TLS
nc_client_tls_destroy_opts();
#endif
nc_destroy();
}
API NC_MSG_TYPE
nc_recv_reply(struct nc_session *session, struct nc_rpc *rpc, uint64_t msgid, int timeout, int parseroptions, struct nc_reply **reply)
{
struct lyxml_elem *xml = NULL;
NC_MSG_TYPE msgtype = 0; /* NC_MSG_ERROR */
if (!session) {
ERRARG("session");
return NC_MSG_ERROR;
} else if (!rpc) {
ERRARG("rpc");
return NC_MSG_ERROR;
} else if (!msgid) {
ERRARG("msgid");
return NC_MSG_ERROR;
} else if (!reply) {
ERRARG("reply");
return NC_MSG_ERROR;
} else if (parseroptions & LYD_OPT_TYPEMASK) {
ERRARG("parseroptions");
return NC_MSG_ERROR;
} else if ((session->status != NC_STATUS_RUNNING) || (session->side != NC_CLIENT)) {
ERR("Session %u: invalid session to receive RPC replies.", session->id);
return NC_MSG_ERROR;
}
parseroptions &= ~(LYD_OPT_DESTRUCT | LYD_OPT_NOSIBLINGS);
if (!(session->flags & NC_SESSION_CLIENT_NOT_STRICT)) {
parseroptions &= LYD_OPT_STRICT;
}
/* no mechanism to check external dependencies is provided */
parseroptions|= LYD_OPT_NOEXTDEPS;
*reply = NULL;
msgtype = get_msg(session, timeout, msgid, &xml);
if ((msgtype == NC_MSG_REPLY) || (msgtype == NC_MSG_REPLY_ERR_MSGID)) {
*reply = parse_reply(session->ctx, xml, rpc, parseroptions);
lyxml_free_withsiblings(session->ctx, xml);
xml = NULL;
if (!(*reply)) {
return NC_MSG_ERROR;
}
}
assert(!xml);
return msgtype;
}
API NC_MSG_TYPE
nc_recv_notif(struct nc_session *session, int timeout, struct nc_notif **notif)
{
struct lyxml_elem *xml, *ev_time;
NC_MSG_TYPE msgtype = 0; /* NC_MSG_ERROR */
if (!session) {
ERRARG("session");
return NC_MSG_ERROR;
} else if (!notif) {
ERRARG("notif");
return NC_MSG_ERROR;
} else if (session->status != NC_STATUS_RUNNING || session->side != NC_CLIENT) {
ERR("Session %u: invalid session to receive Notifications.", session->id);
return NC_MSG_ERROR;
}
msgtype = get_msg(session, timeout, 0, &xml);
if (msgtype == NC_MSG_NOTIF) {
*notif = calloc(1, sizeof **notif);
if (!*notif) {
ERRMEM;
lyxml_free(session->ctx, xml);
return NC_MSG_ERROR;
}
/* eventTime */
LY_TREE_FOR(xml->child, ev_time) {
if (!strcmp(ev_time->name, "eventTime")) {
(*notif)->datetime = lydict_insert(session->ctx, ev_time->content, 0);
/* lyd_parse does not know this element */
lyxml_free(session->ctx, ev_time);
break;
}
}
if (!(*notif)->datetime) {
ERR("Session %u: notification is missing the \"eventTime\" element.", session->id);
goto fail;
}
/* notification body */
(*notif)->tree = lyd_parse_xml(session->ctx, &xml->child, LYD_OPT_NOTIF | LYD_OPT_DESTRUCT | LYD_OPT_NOEXTDEPS
| (session->flags & NC_SESSION_CLIENT_NOT_STRICT ? 0 : LYD_OPT_STRICT), NULL);
lyxml_free(session->ctx, xml);
xml = NULL;
if (!(*notif)->tree) {
ERR("Session %u: failed to parse a new notification.", session->id);
goto fail;
}
}
return msgtype;
fail:
lydict_remove(session->ctx, (*notif)->datetime);
lyd_free((*notif)->tree);
free(*notif);
*notif = NULL;
lyxml_free(session->ctx, xml);
return NC_MSG_ERROR;
}
static void *
nc_recv_notif_thread(void *arg)
{
struct nc_ntf_thread_arg *ntarg;
struct nc_session *session;
void (*notif_clb)(struct nc_session *session, const struct nc_notif *notif);
struct nc_notif *notif;
NC_MSG_TYPE msgtype;
pthread_t *ntf_tid;
pthread_detach(pthread_self());
ntarg = (struct nc_ntf_thread_arg *)arg;
session = ntarg->session;
notif_clb = ntarg->notif_clb;
free(ntarg);
/* remember our allocated tid, we will be freeing it */
ntf_tid = (pthread_t *)session->opts.client.ntf_tid;
while (session->opts.client.ntf_tid) {
msgtype = nc_recv_notif(session, NC_CLIENT_NOTIF_THREAD_SLEEP / 1000, &notif);
if (msgtype == NC_MSG_NOTIF) {
notif_clb(session, notif);
if (!strcmp(notif->tree->schema->name, "notificationComplete")
&& !strcmp(notif->tree->schema->module->name, "nc-notifications")) {
nc_notif_free(notif);
break;
}
nc_notif_free(notif);
} else if ((msgtype == NC_MSG_ERROR) && (session->status != NC_STATUS_RUNNING)) {
/* quit this thread once the session is broken */
break;
}
usleep(NC_CLIENT_NOTIF_THREAD_SLEEP);
}
VRB("Session %u: notification thread exit.", session->id);
session->opts.client.ntf_tid = NULL;
free(ntf_tid);
return NULL;
}
API int
nc_recv_notif_dispatch(struct nc_session *session, void (*notif_clb)(struct nc_session *session, const struct nc_notif *notif))
{
struct nc_ntf_thread_arg *ntarg;
int ret;
if (!session) {
ERRARG("session");
return -1;
} else if (!notif_clb) {
ERRARG("notif_clb");
return -1;
} else if ((session->status != NC_STATUS_RUNNING) || (session->side != NC_CLIENT)) {
ERR("Session %u: invalid session to receive Notifications.", session->id);
return -1;
} else if (session->opts.client.ntf_tid) {
ERR("Session %u: separate notification thread is already running.", session->id);
return -1;
}
ntarg = malloc(sizeof *ntarg);
if (!ntarg) {
ERRMEM;
return -1;
}
ntarg->session = session;
ntarg->notif_clb = notif_clb;
/* just so that nc_recv_notif_thread() does not immediately exit, the value does not matter */
session->opts.client.ntf_tid = malloc(sizeof *session->opts.client.ntf_tid);
if (!session->opts.client.ntf_tid) {
ERRMEM;
free(ntarg);
return -1;
}
ret = pthread_create((pthread_t *)session->opts.client.ntf_tid, NULL, nc_recv_notif_thread, ntarg);
if (ret) {
ERR("Session %u: failed to create a new thread (%s).", strerror(errno));
free(ntarg);
free((pthread_t *)session->opts.client.ntf_tid);
session->opts.client.ntf_tid = NULL;
return -1;
}
return 0;
}
API NC_MSG_TYPE
nc_send_rpc(struct nc_session *session, struct nc_rpc *rpc, int timeout, uint64_t *msgid)
{
NC_MSG_TYPE r;
int dofree = 1;
struct nc_rpc_act_generic *rpc_gen;
struct nc_rpc_getconfig *rpc_gc;
struct nc_rpc_edit *rpc_e;
struct nc_rpc_copy *rpc_cp;
struct nc_rpc_delete *rpc_del;
struct nc_rpc_lock *rpc_lock;
struct nc_rpc_get *rpc_g;
struct nc_rpc_kill *rpc_k;
struct nc_rpc_commit *rpc_com;
struct nc_rpc_cancel *rpc_can;
struct nc_rpc_validate *rpc_val;
struct nc_rpc_getschema *rpc_gs;
struct nc_rpc_subscribe *rpc_sub;
struct nc_rpc_getdata *rpc_getd;
struct nc_rpc_editdata *rpc_editd;
struct lyd_node *data, *node;
const struct lys_module *mod = NULL, *ietfncwd;
int i;
char str[11];
uint64_t cur_msgid;
if (!session) {
ERRARG("session");
return NC_MSG_ERROR;
} else if (!rpc) {
ERRARG("rpc");
return NC_MSG_ERROR;
} else if (!msgid) {
ERRARG("msgid");
return NC_MSG_ERROR;
} else if (session->status != NC_STATUS_RUNNING || session->side != NC_CLIENT) {
ERR("Session %u: invalid session to send RPCs.", session->id);
return NC_MSG_ERROR;
}
switch (rpc->type) {
case NC_RPC_ACT_GENERIC:
/* checked when parsing */
break;
case NC_RPC_GETCONFIG:
case NC_RPC_EDIT:
case NC_RPC_COPY:
case NC_RPC_DELETE:
case NC_RPC_LOCK:
case NC_RPC_UNLOCK:
case NC_RPC_GET:
case NC_RPC_KILL:
case NC_RPC_COMMIT:
case NC_RPC_DISCARD:
case NC_RPC_CANCEL:
case NC_RPC_VALIDATE:
mod = ly_ctx_get_module(session->ctx, "ietf-netconf", NULL, 1);
if (!mod) {
ERR("Session %u: missing \"ietf-netconf\" schema in the context.", session->id);
return NC_MSG_ERROR;
}
break;
case NC_RPC_GETSCHEMA:
mod = ly_ctx_get_module(session->ctx, "ietf-netconf-monitoring", NULL, 1);
if (!mod) {
ERR("Session %u: missing \"ietf-netconf-monitoring\" schema in the context.", session->id);
return NC_MSG_ERROR;
}
break;
case NC_RPC_SUBSCRIBE:
mod = ly_ctx_get_module(session->ctx, "notifications", NULL, 1);
if (!mod) {
ERR("Session %u: missing \"notifications\" schema in the context.", session->id);
return NC_MSG_ERROR;
}
break;
case NC_RPC_GETDATA:
case NC_RPC_EDITDATA:
mod = ly_ctx_get_module(session->ctx, "ietf-netconf-nmda", NULL, 1);
if (!mod) {
ERR("Session %u: missing \"ietf-netconf-nmda\" schema in the context.", session->id);
return NC_MSG_ERROR;
}
break;
case NC_RPC_UNKNOWN:
ERRINT;
return NC_MSG_ERROR;
}
switch (rpc->type) {
case NC_RPC_ACT_GENERIC:
rpc_gen = (struct nc_rpc_act_generic *)rpc;
if (rpc_gen->has_data) {
data = rpc_gen->content.data;
dofree = 0;
} else {
data = lyd_parse_mem(session->ctx, rpc_gen->content.xml_str, LYD_XML, LYD_OPT_RPC | LYD_OPT_NOEXTDEPS
| (session->flags & NC_SESSION_CLIENT_NOT_STRICT ? 0 : LYD_OPT_STRICT), NULL);
if (!data) {
return NC_MSG_ERROR;
}
}
break;
case NC_RPC_GETCONFIG:
rpc_gc = (struct nc_rpc_getconfig *)rpc;
data = lyd_new(NULL, mod, "get-config");
node = lyd_new(data, mod, "source");
node = lyd_new_leaf(node, mod, ncds2str[rpc_gc->source], NULL);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
if (rpc_gc->filter) {
if (!rpc_gc->filter[0] || (rpc_gc->filter[0] == '<')) {
node = lyd_new_anydata(data, mod, "filter", rpc_gc->filter, LYD_ANYDATA_SXML);
lyd_insert_attr(node, NULL, "type", "subtree");
} else {
node = lyd_new_anydata(data, mod, "filter", NULL, LYD_ANYDATA_CONSTSTRING);
lyd_insert_attr(node, NULL, "type", "xpath");
lyd_insert_attr(node, NULL, "select", rpc_gc->filter);
}
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
if (rpc_gc->wd_mode) {
ietfncwd = ly_ctx_get_module(session->ctx, "ietf-netconf-with-defaults", NULL, 1);
if (!ietfncwd) {
ERR("Session %u: missing \"ietf-netconf-with-defaults\" schema in the context.", session->id);
lyd_free(data);
return NC_MSG_ERROR;
}
switch (rpc_gc->wd_mode) {
case NC_WD_UNKNOWN:
/* cannot get here */
break;
case NC_WD_ALL:
node = lyd_new_leaf(data, ietfncwd, "with-defaults", "report-all");
break;
case NC_WD_ALL_TAG:
node = lyd_new_leaf(data, ietfncwd, "with-defaults", "report-all-tagged");
break;
case NC_WD_TRIM:
node = lyd_new_leaf(data, ietfncwd, "with-defaults", "trim");
break;
case NC_WD_EXPLICIT:
node = lyd_new_leaf(data, ietfncwd, "with-defaults", "explicit");
break;
}
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
break;
case NC_RPC_EDIT:
rpc_e = (struct nc_rpc_edit *)rpc;
data = lyd_new(NULL, mod, "edit-config");
node = lyd_new(data, mod, "target");
node = lyd_new_leaf(node, mod, ncds2str[rpc_e->target], NULL);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
if (rpc_e->default_op) {
node = lyd_new_leaf(data, mod, "default-operation", rpcedit_dfltop2str[rpc_e->default_op]);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
if (rpc_e->test_opt) {
node = lyd_new_leaf(data, mod, "test-option", rpcedit_testopt2str[rpc_e->test_opt]);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
if (rpc_e->error_opt) {
node = lyd_new_leaf(data, mod, "error-option", rpcedit_erropt2str[rpc_e->error_opt]);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
if (!rpc_e->edit_cont[0] || (rpc_e->edit_cont[0] == '<')) {
node = lyd_new_anydata(data, mod, "config", rpc_e->edit_cont, LYD_ANYDATA_SXML);
} else {
node = lyd_new_leaf(data, mod, "url", rpc_e->edit_cont);
}
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
break;
case NC_RPC_COPY:
rpc_cp = (struct nc_rpc_copy *)rpc;
data = lyd_new(NULL, mod, "copy-config");
node = lyd_new(data, mod, "target");
if (rpc_cp->url_trg) {
node = lyd_new_leaf(node, mod, "url", rpc_cp->url_trg);
} else {
node = lyd_new_leaf(node, mod, ncds2str[rpc_cp->target], NULL);
}
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
node = lyd_new(data, mod, "source");
if (rpc_cp->url_config_src) {
if (!rpc_cp->url_config_src[0] || (rpc_cp->url_config_src[0] == '<')) {
node = lyd_new_anydata(node, mod, "config", rpc_cp->url_config_src, LYD_ANYDATA_SXML);
} else {
node = lyd_new_leaf(node, mod, "url", rpc_cp->url_config_src);
}
} else {
node = lyd_new_leaf(node, mod, ncds2str[rpc_cp->source], NULL);
}
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
if (rpc_cp->wd_mode) {
ietfncwd = ly_ctx_get_module(session->ctx, "ietf-netconf-with-defaults", NULL, 1);
if (!ietfncwd) {
ERR("Session %u: missing \"ietf-netconf-with-defaults\" schema in the context.", session->id);
lyd_free(data);
return NC_MSG_ERROR;
}
switch (rpc_cp->wd_mode) {
case NC_WD_UNKNOWN:
/* cannot get here */
break;
case NC_WD_ALL:
node = lyd_new_leaf(data, ietfncwd, "with-defaults", "report-all");
break;
case NC_WD_ALL_TAG:
node = lyd_new_leaf(data, ietfncwd, "with-defaults", "report-all-tagged");
break;
case NC_WD_TRIM:
node = lyd_new_leaf(data, ietfncwd, "with-defaults", "trim");
break;
case NC_WD_EXPLICIT:
node = lyd_new_leaf(data, ietfncwd, "with-defaults", "explicit");
break;
}
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
break;
case NC_RPC_DELETE:
rpc_del = (struct nc_rpc_delete *)rpc;
data = lyd_new(NULL, mod, "delete-config");
node = lyd_new(data, mod, "target");
if (rpc_del->url) {
node = lyd_new_leaf(node, mod, "url", rpc_del->url);
} else {
node = lyd_new_leaf(node, mod, ncds2str[rpc_del->target], NULL);
}
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
break;
case NC_RPC_LOCK:
rpc_lock = (struct nc_rpc_lock *)rpc;
data = lyd_new(NULL, mod, "lock");
node = lyd_new(data, mod, "target");
node = lyd_new_leaf(node, mod, ncds2str[rpc_lock->target], NULL);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
break;
case NC_RPC_UNLOCK:
rpc_lock = (struct nc_rpc_lock *)rpc;
data = lyd_new(NULL, mod, "unlock");
node = lyd_new(data, mod, "target");
node = lyd_new_leaf(node, mod, ncds2str[rpc_lock->target], NULL);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
break;
case NC_RPC_GET:
rpc_g = (struct nc_rpc_get *)rpc;
data = lyd_new(NULL, mod, "get");
if (rpc_g->filter) {
if (!rpc_g->filter[0] || (rpc_g->filter[0] == '<')) {
node = lyd_new_anydata(data, mod, "filter", rpc_g->filter, LYD_ANYDATA_SXML);
lyd_insert_attr(node, NULL, "type", "subtree");
} else {
node = lyd_new_anydata(data, mod, "filter", NULL, LYD_ANYDATA_CONSTSTRING);
lyd_insert_attr(node, NULL, "type", "xpath");
lyd_insert_attr(node, NULL, "select", rpc_g->filter);
}
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
if (rpc_g->wd_mode) {
ietfncwd = ly_ctx_get_module(session->ctx, "ietf-netconf-with-defaults", NULL, 1);
if (!ietfncwd) {
ERR("Session %u: missing \"ietf-netconf-with-defaults\" schema in the context.", session->id);
lyd_free(data);
return NC_MSG_ERROR;
}
switch (rpc_g->wd_mode) {
case NC_WD_ALL:
node = lyd_new_leaf(data, ietfncwd, "with-defaults", "report-all");
break;
case NC_WD_ALL_TAG:
node = lyd_new_leaf(data, ietfncwd, "with-defaults", "report-all-tagged");
break;
case NC_WD_TRIM:
node = lyd_new_leaf(data, ietfncwd, "with-defaults", "trim");
break;
case NC_WD_EXPLICIT:
node = lyd_new_leaf(data, ietfncwd, "with-defaults", "explicit");
break;
default:
/* cannot get here */
node = NULL;
break;
}
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
break;
case NC_RPC_KILL:
rpc_k = (struct nc_rpc_kill *)rpc;
data = lyd_new(NULL, mod, "kill-session");
sprintf(str, "%u", rpc_k->sid);
lyd_new_leaf(data, mod, "session-id", str);
break;
case NC_RPC_COMMIT:
rpc_com = (struct nc_rpc_commit *)rpc;
data = lyd_new(NULL, mod, "commit");
if (rpc_com->confirmed) {
lyd_new_leaf(data, mod, "confirmed", NULL);
}
if (rpc_com->confirm_timeout) {
sprintf(str, "%u", rpc_com->confirm_timeout);
lyd_new_leaf(data, mod, "confirm-timeout", str);
}
if (rpc_com->persist) {
node = lyd_new_leaf(data, mod, "persist", rpc_com->persist);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
if (rpc_com->persist_id) {
node = lyd_new_leaf(data, mod, "persist-id", rpc_com->persist_id);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
break;
case NC_RPC_DISCARD:
data = lyd_new(NULL, mod, "discard-changes");
break;
case NC_RPC_CANCEL:
rpc_can = (struct nc_rpc_cancel *)rpc;
data = lyd_new(NULL, mod, "cancel-commit");
if (rpc_can->persist_id) {
node = lyd_new_leaf(data, mod, "persist-id", rpc_can->persist_id);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
break;
case NC_RPC_VALIDATE:
rpc_val = (struct nc_rpc_validate *)rpc;
data = lyd_new(NULL, mod, "validate");
node = lyd_new(data, mod, "source");
if (rpc_val->url_config_src) {
if (!rpc_val->url_config_src[0] || (rpc_val->url_config_src[0] == '<')) {
node = lyd_new_anydata(node, mod, "config", rpc_val->url_config_src, LYD_ANYDATA_SXML);
} else {
node = lyd_new_leaf(node, mod, "url", rpc_val->url_config_src);
}
} else {
node = lyd_new_leaf(node, mod, ncds2str[rpc_val->source], NULL);
}
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
break;
case NC_RPC_GETSCHEMA:
rpc_gs = (struct nc_rpc_getschema *)rpc;
data = lyd_new(NULL, mod, "get-schema");
node = lyd_new_leaf(data, mod, "identifier", rpc_gs->identifier);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
if (rpc_gs->version) {
node = lyd_new_leaf(data, mod, "version", rpc_gs->version);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
if (rpc_gs->format) {
node = lyd_new_leaf(data, mod, "format", rpc_gs->format);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
break;
case NC_RPC_SUBSCRIBE:
rpc_sub = (struct nc_rpc_subscribe *)rpc;
data = lyd_new(NULL, mod, "create-subscription");
if (rpc_sub->stream) {
node = lyd_new_leaf(data, mod, "stream", rpc_sub->stream);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
if (rpc_sub->filter) {
if (!rpc_sub->filter[0] || (rpc_sub->filter[0] == '<')) {
node = lyd_new_anydata(data, mod, "filter", rpc_sub->filter, LYD_ANYDATA_SXML);
lyd_insert_attr(node, NULL, "type", "subtree");
} else {
node = lyd_new_anydata(data, mod, "filter", NULL, LYD_ANYDATA_CONSTSTRING);
lyd_insert_attr(node, NULL, "type", "xpath");
lyd_insert_attr(node, NULL, "select", rpc_sub->filter);
}
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
if (rpc_sub->start) {
node = lyd_new_leaf(data, mod, "startTime", rpc_sub->start);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
if (rpc_sub->stop) {
node = lyd_new_leaf(data, mod, "stopTime", rpc_sub->stop);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
break;
case NC_RPC_GETDATA:
rpc_getd = (struct nc_rpc_getdata *)rpc;
data = lyd_new(NULL, mod, "get-data");
node = lyd_new_leaf(data, mod, "datastore", rpc_getd->datastore);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
if (rpc_getd->filter) {
if (!rpc_getd->filter[0] || (rpc_getd->filter[0] == '<')) {
node = lyd_new_anydata(data, mod, "subtree-filter", rpc_getd->filter, LYD_ANYDATA_SXML);
} else {
node = lyd_new_leaf(data, mod, "xpath-filter", rpc_getd->filter);
}
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
if (rpc_getd->config_filter) {
node = lyd_new_leaf(data, mod, "config-filter", rpc_getd->config_filter);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
for (i = 0; i < rpc_getd->origin_filter_count; ++i) {
node = lyd_new_leaf(data, mod, rpc_getd->negated_origin_filter ? "negated-origin-filter" : "origin-filter",
rpc_getd->origin_filter[i]);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
if (rpc_getd->max_depth) {
sprintf(str, "%u", rpc_getd->max_depth);
node = lyd_new_leaf(data, mod, "max-depth", str);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
if (rpc_getd->with_origin) {
node = lyd_new_leaf(data, mod, "with-origin", NULL);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
if (rpc_getd->wd_mode) {
switch (rpc_getd->wd_mode) {
case NC_WD_UNKNOWN:
/* cannot get here */
break;
case NC_WD_ALL:
/* "with-defaults" are used from a grouping so it belongs to the ietf-netconf-nmda module */
node = lyd_new_leaf(data, mod, "with-defaults", "report-all");
break;
case NC_WD_ALL_TAG:
node = lyd_new_leaf(data, mod, "with-defaults", "report-all-tagged");
break;
case NC_WD_TRIM:
node = lyd_new_leaf(data, mod, "with-defaults", "trim");
break;
case NC_WD_EXPLICIT:
node = lyd_new_leaf(data, mod, "with-defaults", "explicit");
break;
}
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
break;
case NC_RPC_EDITDATA:
rpc_editd = (struct nc_rpc_editdata *)rpc;
data = lyd_new(NULL, mod, "edit-data");
node = lyd_new_leaf(data, mod, "datastore", rpc_editd->datastore);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
if (rpc_editd->default_op) {
node = lyd_new_leaf(data, mod, "default-operation", rpcedit_dfltop2str[rpc_editd->default_op]);
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
}
if (!rpc_editd->edit_cont[0] || (rpc_editd->edit_cont[0] == '<')) {
node = lyd_new_anydata(data, mod, "config", rpc_editd->edit_cont, LYD_ANYDATA_SXML);
} else {
node = lyd_new_leaf(data, mod, "url", rpc_editd->edit_cont);
}
if (!node) {
lyd_free(data);
return NC_MSG_ERROR;
}
break;
default:
ERRINT;
return NC_MSG_ERROR;
}
if (!data) {
/* error was already printed */
return NC_MSG_ERROR;
}
if (lyd_validate(&data, LYD_OPT_RPC | LYD_OPT_NOEXTDEPS
| (session->flags & NC_SESSION_CLIENT_NOT_STRICT ? 0 : LYD_OPT_STRICT), NULL)) {
if (dofree) {
lyd_free(data);
}
return NC_MSG_ERROR;
}
/* send RPC, store its message ID */
r = nc_send_msg_io(session, timeout, data);
cur_msgid = session->opts.client.msgid;
if (dofree) {
lyd_free(data);
}
if (r == NC_MSG_RPC) {
*msgid = cur_msgid;
}
return r;
}
API void
nc_client_session_set_not_strict(struct nc_session *session)
{
if (session->side != NC_CLIENT) {
ERRARG("session");
return;
}
session->flags |= NC_SESSION_CLIENT_NOT_STRICT;
}