blob: 2f53b76b1d1581d0e5435c098a72d1fcc1a62017 [file] [log] [blame]
#include <net-snmp/net-snmp-config.h>
#include <stdlib.h>
#include <string.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/library/snmp_transport.h>
static char**
create_word_array_helper(const char* cptr, size_t idx, char* tmp, size_t tmplen)
{
char* item;
char** res;
cptr = copy_nword(NETSNMP_REMOVE_CONST(char *, cptr), tmp, tmplen);
item = strdup(tmp);
if (cptr)
res = create_word_array_helper(cptr, idx + 1, tmp, tmplen);
else {
res = (char**)malloc(sizeof(char*) * (idx + 2));
res[idx + 1] = NULL;
}
res[idx] = item;
return res;
}
static char**
create_word_array(const char* cptr)
{
size_t tmplen = strlen(cptr);
char* tmp = (char*)malloc(tmplen + 1);
char** res = create_word_array_helper(cptr, 0, tmp, tmplen + 1);
free(tmp);
return res;
}
static void
destroy_word_array(char** arr)
{
if (arr) {
char** run = arr;
while(*run) {
free(*run);
++run;
}
free(arr);
}
}
struct netsnmp_lookup_domain {
char* application;
char** userDomain;
char** domain;
struct netsnmp_lookup_domain* next;
};
static struct netsnmp_lookup_domain* domains = NULL;
int
netsnmp_register_default_domain(const char* application, const char* domain)
{
struct netsnmp_lookup_domain *run = domains, *prev = NULL;
int res = 0;
while (run != NULL && strcmp(run->application, application) < 0) {
prev = run;
run = run->next;
}
if (run && strcmp(run->application, application) == 0) {
if (run->domain != NULL) {
destroy_word_array(run->domain);
run->domain=NULL;
res = 1;
}
} else {
run = SNMP_MALLOC_STRUCT(netsnmp_lookup_domain);
run->application = strdup(application);
run->userDomain = NULL;
if (prev) {
run->next = prev->next;
prev->next = run;
} else {
run->next = domains;
domains = run;
}
}
if (domain) {
run->domain = create_word_array(domain);
} else if (run->userDomain == NULL) {
if (prev)
prev->next = run->next;
else
domains = run->next;
free(run->application);
free(run);
}
return res;
}
void
netsnmp_clear_default_domain(void)
{
while (domains) {
struct netsnmp_lookup_domain *tmp = domains;
domains = domains->next;
free(tmp->application);
destroy_word_array(tmp->userDomain);
destroy_word_array(tmp->domain);
free(tmp);
}
}
static void
netsnmp_register_user_domain(const char* token, char* cptr)
{
struct netsnmp_lookup_domain *run = domains, *prev = NULL;
size_t len = strlen(cptr) + 1;
char* application = (char*)malloc(len);
char** domain;
{
char* cp = copy_nword(cptr, application, len);
if (cp == NULL) {
char tmpbuf[STRINGMAX];
snprintf(tmpbuf, sizeof(tmpbuf),
"No domain(s) in registration of defDomain \"%s\"",
application);
tmpbuf[sizeof(tmpbuf) - 1] = '\0';
config_perror(tmpbuf);
free(application);
return;
}
domain = create_word_array(cp);
}
while (run != NULL && strcmp(run->application, application) < 0) {
prev = run;
run = run->next;
}
if (run && strcmp(run->application, application) == 0) {
if (run->userDomain != NULL) {
config_perror("Default transport already registered for this "
"application");
destroy_word_array(domain);
free(application);
return;
}
} else {
run = SNMP_MALLOC_STRUCT(netsnmp_lookup_domain);
run->application = strdup(application);
run->domain = NULL;
if (prev) {
run->next = prev->next;
prev->next = run;
} else {
run->next = domains;
domains = run;
}
}
run->userDomain = domain;
free(application);
}
static void
netsnmp_clear_user_domain(void)
{
struct netsnmp_lookup_domain *run = domains, *prev = NULL;
while (run) {
if (run->userDomain != NULL) {
destroy_word_array(run->userDomain);
run->userDomain = NULL;
}
if (run->domain == NULL) {
struct netsnmp_lookup_domain *tmp = run;
if (prev)
run = prev->next = run->next;
else
run = domains = run->next;
free(tmp->application);
free(tmp);
} else {
prev = run;
run = run->next;
}
}
}
const char* const *
netsnmp_lookup_default_domains(const char* application)
{
const char * const * res;
if (application == NULL)
res = NULL;
else {
struct netsnmp_lookup_domain *run = domains;
while (run && strcmp(run->application, application) < 0)
run = run->next;
if (run && strcmp(run->application, application) == 0)
if (run->userDomain)
res = (const char * const *)run->userDomain;
else
res = (const char * const *)run->domain;
else
res = NULL;
}
DEBUGMSGTL(("defaults",
"netsnmp_lookup_default_domain(\"%s\") ->",
application ? application : "[NIL]"));
if (res) {
const char * const * r = res;
while(*r) {
DEBUGMSG(("defaults", " \"%s\"", *r));
++r;
}
DEBUGMSG(("defaults", "\n"));
} else
DEBUGMSG(("defaults", " \"[NIL]\"\n"));
return res;
}
const char*
netsnmp_lookup_default_domain(const char* application)
{
const char * const * res = netsnmp_lookup_default_domains(application);
return (res ? *res : NULL);
}
struct netsnmp_lookup_target {
char* application;
char* domain;
char* userTarget;
char* target;
struct netsnmp_lookup_target* next;
};
static struct netsnmp_lookup_target* targets = NULL;
/**
* Add an (application, domain, target) triplet to the targets list if target
* != NULL. Remove an entry if target == NULL and the userTarget pointer for
* the entry found is also NULL. Keep at most one target per (application,
* domain) pair.
*
* @return 1 if an entry for (application, domain) was already present in the
* targets list or 0 if such an entry was not yet present in the targets list.
*/
int
netsnmp_register_default_target(const char* application, const char* domain,
const char* target)
{
struct netsnmp_lookup_target *run = targets, *prev = NULL;
int i = 0, res = 0;
while (run && ((i = strcmp(run->application, application)) < 0 ||
(i == 0 && strcmp(run->domain, domain) < 0))) {
prev = run;
run = run->next;
}
if (run && i == 0 && strcmp(run->domain, domain) == 0) {
if (run->target != NULL) {
free(run->target);
run->target = NULL;
res = 1;
}
} else {
run = SNMP_MALLOC_STRUCT(netsnmp_lookup_target);
run->application = strdup(application);
run->domain = strdup(domain);
run->userTarget = NULL;
if (prev) {
run->next = prev->next;
prev->next = run;
} else {
run->next = targets;
targets = run;
}
}
if (target) {
run->target = strdup(target);
} else if (run->userTarget == NULL) {
if (prev)
prev->next = run->next;
else
targets = run->next;
free(run->domain);
free(run->application);
free(run);
}
return res;
}
/**
* Clear the targets list.
*/
void
netsnmp_clear_default_target(void)
{
while (targets) {
struct netsnmp_lookup_target *tmp = targets;
targets = targets->next;
free(tmp->application);
free(tmp->domain);
free(tmp->userTarget);
free(tmp->target);
free(tmp);
}
}
static void
netsnmp_register_user_target(const char* token, char* cptr)
{
struct netsnmp_lookup_target *run = targets, *prev = NULL;
size_t len = strlen(cptr) + 1;
char* application = (char*)malloc(len);
char* domain = (char*)malloc(len);
char* target = (char*)malloc(len);
int i = 0;
{
char* cp = copy_nword(cptr, application, len);
if (cp == NULL) {
char tmpbuf[STRINGMAX];
snprintf(tmpbuf, sizeof(tmpbuf),
"No domain and target in registration of "
"defTarget \"%s\"", application);
tmpbuf[sizeof(tmpbuf) - 1] = '\0';
config_perror(tmpbuf);
goto done;
}
cp = copy_nword(cp, domain, len);
if (cp == NULL) {
char tmpbuf[STRINGMAX];
snprintf(tmpbuf, sizeof(tmpbuf),
"No target in registration of defTarget \"%s\" \"%s\"",
application, domain);
tmpbuf[sizeof(tmpbuf) - 1] = '\0';
config_perror(tmpbuf);
goto done;
}
cp = copy_nword(cp, target, len);
if (cp)
config_pwarn("Trailing junk found");
}
while (run && ((i = strcmp(run->application, application)) < 0 ||
(i == 0 && strcmp(run->domain, domain) < 0))) {
prev = run;
run = run->next;
}
if (run && i == 0 && strcmp(run->domain, domain) == 0) {
if (run->userTarget != NULL) {
config_perror("Default target already registered for this "
"application-domain combination");
goto done;
}
} else {
run = SNMP_MALLOC_STRUCT(netsnmp_lookup_target);
run->application = strdup(application);
run->domain = strdup(domain);
run->target = NULL;
if (prev) {
run->next = prev->next;
prev->next = run;
} else {
run->next = targets;
targets = run;
}
}
run->userTarget = strdup(target);
done:
free(target);
free(domain);
free(application);
}
static void
netsnmp_clear_user_target(void)
{
struct netsnmp_lookup_target *run = targets, *prev = NULL;
while (run) {
if (run->userTarget != NULL) {
free(run->userTarget);
run->userTarget = NULL;
}
if (run->target == NULL) {
struct netsnmp_lookup_target *tmp = run;
if (prev)
run = prev->next = run->next;
else
run = targets = run->next;
free(tmp->application);
free(tmp->domain);
free(tmp);
} else {
prev = run;
run = run->next;
}
}
}
const char*
netsnmp_lookup_default_target(const char* application, const char* domain)
{
int i = 0;
struct netsnmp_lookup_target *run = targets;
const char *res;
if (application == NULL || domain == NULL)
res = NULL;
else {
while (run && ((i = strcmp(run->application, application)) < 0 ||
(i == 0 && strcmp(run->domain, domain) < 0)))
run = run->next;
if (run && i == 0 && strcmp(run->domain, domain) == 0)
if (run->userTarget != NULL)
res = run->userTarget;
else
res = run->target;
else
res = NULL;
}
DEBUGMSGTL(("defaults",
"netsnmp_lookup_default_target(\"%s\", \"%s\") -> \"%s\"\n",
application ? application : "[NIL]",
domain ? domain : "[NIL]",
res ? res : "[NIL]"));
return res;
}
void
netsnmp_register_service_handlers(void)
{
register_config_handler("snmp:", "defDomain",
netsnmp_register_user_domain,
netsnmp_clear_user_domain,
"application domain");
register_config_handler("snmp:", "defTarget",
netsnmp_register_user_target,
netsnmp_clear_user_target,
"application domain target");
}