tor-android/external/badvpn_dns/ncd/modules/parse.c

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2015-01-25 11:08:34 +00:00
/**
* @file parse.c
* @author Ambroz Bizjak <ambrop7@gmail.com>
*
* @section LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @section DESCRIPTION
*
* Synopsis:
* parse_number(string str)
* parse_value(string str)
* parse_ipv4_addr(string str)
* parse_ipv6_addr(string str)
*
* Variables:
* succeeded - "true" or "false", reflecting success of the parsing
* (empty) - normalized parsed value (only if succeeded)
*
* Synopsis:
* parse_ipv4_cidr_addr(string str)
* parse_ipv6_cidr_addr(string str)
*
* Variables:
* succeeded - "true" or "false", reflecting success of the parsing
* (empty) - normalized CIDR notation address (only if succeeded)
* addr - normalized address without prefix (only if succeeded)
* prefix - normalized prefix without address (only if succeeded)
*/
#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include <misc/parse_number.h>
#include <misc/ipaddr.h>
#include <misc/ipaddr6.h>
#include <ncd/NCDValParser.h>
#include <ncd/NCDModule.h>
#include <ncd/static_strings.h>
#include <ncd/extra/value_utils.h>
#include <generated/blog_channel_ncd_parse.h>
#define ModuleLog(i, ...) NCDModuleInst_Backend_Log((i), BLOG_CURRENT_CHANNEL, __VA_ARGS__)
#define ModuleString(i, id) ((i)->m->group->strings[(id)])
struct instance {
NCDModuleInst *i;
NCDValMem mem;
NCDValRef value;
int succeeded;
};
struct ipv4_cidr_instance {
NCDModuleInst *i;
int succeeded;
struct ipv4_ifaddr ifaddr;
};
struct ipv6_cidr_instance {
NCDModuleInst *i;
int succeeded;
struct ipv6_ifaddr ifaddr;
};
enum {STRING_ADDR, STRING_PREFIX};
static const char *strings[] = {
"addr", "prefix", NULL
};
typedef int (*parse_func) (NCDModuleInst *i, const char *str, size_t str_len, NCDValMem *mem, NCDValRef *out);
static int parse_number (NCDModuleInst *i, const char *str, size_t str_len, NCDValMem *mem, NCDValRef *out)
{
uintmax_t n;
if (!parse_unsigned_integer_bin(str, str_len, &n)) {
ModuleLog(i, BLOG_ERROR, "failed to parse number");
return 0;
}
*out = ncd_make_uintmax(mem, n);
if (NCDVal_IsInvalid(*out)) {
return 0;
}
return 1;
}
static int parse_value (NCDModuleInst *i, const char *str, size_t str_len, NCDValMem *mem, NCDValRef *out)
{
if (!NCDValParser_Parse(str, str_len, mem, out)) {
ModuleLog(i, BLOG_ERROR, "failed to parse value");
return 0;
}
return 1;
}
static int parse_ipv4_addr (NCDModuleInst *i, const char *str, size_t str_len, NCDValMem *mem, NCDValRef *out)
{
uint32_t addr;
if (!ipaddr_parse_ipv4_addr_bin(str, str_len, &addr)) {
ModuleLog(i, BLOG_ERROR, "failed to parse ipv4 addresss");
return 0;
}
char buf[IPADDR_PRINT_MAX];
ipaddr_print_addr(addr, buf);
*out = NCDVal_NewString(mem, buf);
if (NCDVal_IsInvalid(*out)) {
return 0;
}
return 1;
}
static int parse_ipv6_addr (NCDModuleInst *i, const char *str, size_t str_len, NCDValMem *mem, NCDValRef *out)
{
struct ipv6_addr addr;
if (!ipaddr6_parse_ipv6_addr_bin(str, str_len, &addr)) {
ModuleLog(i, BLOG_ERROR, "failed to parse ipv6 addresss");
return 0;
}
char buf[IPADDR6_PRINT_MAX];
ipaddr6_print_addr(addr, buf);
*out = NCDVal_NewString(mem, buf);
if (NCDVal_IsInvalid(*out)) {
return 0;
}
return 1;
}
static void new_templ (void *vo, NCDModuleInst *i, const struct NCDModuleInst_new_params *params, parse_func pfunc)
{
struct instance *o = vo;
o->i = i;
// read arguments
NCDValRef str_arg;
if (!NCDVal_ListRead(params->args, 1, &str_arg)) {
ModuleLog(i, BLOG_ERROR, "wrong arity");
goto fail0;
}
if (!NCDVal_IsString(str_arg)) {
ModuleLog(o->i, BLOG_ERROR, "wrong type");
goto fail0;
}
// init mem
NCDValMem_Init(&o->mem);
// parse
o->succeeded = pfunc(i, NCDVal_StringData(str_arg), NCDVal_StringLength(str_arg), &o->mem, &o->value);
// signal up
NCDModuleInst_Backend_Up(i);
return;
fail0:
NCDModuleInst_Backend_DeadError(i);
}
static void func_die (void *vo)
{
struct instance *o = vo;
// free mem
NCDValMem_Free(&o->mem);
NCDModuleInst_Backend_Dead(o->i);
}
static int func_getvar2 (void *vo, NCD_string_id_t name, NCDValMem *mem, NCDValRef *out)
{
struct instance *o = vo;
if (name == NCD_STRING_SUCCEEDED) {
*out = ncd_make_boolean(mem, o->succeeded, o->i->params->iparams->string_index);
return 1;
}
if (o->succeeded && name == NCD_STRING_EMPTY) {
*out = NCDVal_NewCopy(mem, o->value);
return 1;
}
return 0;
}
static void func_new_parse_number (void *vo, NCDModuleInst *i, const struct NCDModuleInst_new_params *params)
{
new_templ(vo, i, params, parse_number);
}
static void func_new_parse_value (void *vo, NCDModuleInst *i, const struct NCDModuleInst_new_params *params)
{
new_templ(vo, i, params, parse_value);
}
static void func_new_parse_ipv4_addr (void *vo, NCDModuleInst *i, const struct NCDModuleInst_new_params *params)
{
new_templ(vo, i, params, parse_ipv4_addr);
}
static void func_new_parse_ipv6_addr (void *vo, NCDModuleInst *i, const struct NCDModuleInst_new_params *params)
{
new_templ(vo, i, params, parse_ipv6_addr);
}
static void ipv4_cidr_addr_func_new (void *vo, NCDModuleInst *i, const struct NCDModuleInst_new_params *params)
{
struct ipv4_cidr_instance *o = vo;
o->i = i;
NCDValRef str_arg;
if (!NCDVal_ListRead(params->args, 1, &str_arg)) {
ModuleLog(i, BLOG_ERROR, "wrong arity");
goto fail0;
}
if (!NCDVal_IsString(str_arg)) {
ModuleLog(o->i, BLOG_ERROR, "wrong type");
goto fail0;
}
o->succeeded = ipaddr_parse_ipv4_ifaddr_bin(NCDVal_StringData(str_arg), NCDVal_StringLength(str_arg), &o->ifaddr);
NCDModuleInst_Backend_Up(i);
return;
fail0:
NCDModuleInst_Backend_DeadError(i);
}
static int ipv4_cidr_addr_func_getvar2 (void *vo, NCD_string_id_t name, NCDValMem *mem, NCDValRef *out)
{
struct ipv4_cidr_instance *o = vo;
if (name == NCD_STRING_SUCCEEDED) {
*out = ncd_make_boolean(mem, o->succeeded, o->i->params->iparams->string_index);
return 1;
}
if (!o->succeeded) {
return 0;
}
char str[IPADDR_PRINT_MAX];
if (name == NCD_STRING_EMPTY) {
ipaddr_print_ifaddr(o->ifaddr, str);
}
else if (name == ModuleString(o->i, STRING_ADDR)) {
ipaddr_print_addr(o->ifaddr.addr, str);
}
else if (name == ModuleString(o->i, STRING_PREFIX)) {
sprintf(str, "%d", o->ifaddr.prefix);
}
else {
return 0;
}
*out = NCDVal_NewString(mem, str);
return 1;
}
static void ipv6_cidr_addr_func_new (void *vo, NCDModuleInst *i, const struct NCDModuleInst_new_params *params)
{
struct ipv6_cidr_instance *o = vo;
o->i = i;
NCDValRef str_arg;
if (!NCDVal_ListRead(params->args, 1, &str_arg)) {
ModuleLog(i, BLOG_ERROR, "wrong arity");
goto fail0;
}
if (!NCDVal_IsString(str_arg)) {
ModuleLog(o->i, BLOG_ERROR, "wrong type");
goto fail0;
}
o->succeeded = ipaddr6_parse_ipv6_ifaddr_bin(NCDVal_StringData(str_arg), NCDVal_StringLength(str_arg), &o->ifaddr);
NCDModuleInst_Backend_Up(i);
return;
fail0:
NCDModuleInst_Backend_DeadError(i);
}
static int ipv6_cidr_addr_func_getvar2 (void *vo, NCD_string_id_t name, NCDValMem *mem, NCDValRef *out)
{
struct ipv6_cidr_instance *o = vo;
if (name == NCD_STRING_SUCCEEDED) {
*out = ncd_make_boolean(mem, o->succeeded, o->i->params->iparams->string_index);
return 1;
}
if (!o->succeeded) {
return 0;
}
char str[IPADDR6_PRINT_MAX];
if (name == NCD_STRING_EMPTY) {
ipaddr6_print_ifaddr(o->ifaddr, str);
}
else if (name == ModuleString(o->i, STRING_ADDR)) {
ipaddr6_print_addr(o->ifaddr.addr, str);
}
else if (name == ModuleString(o->i, STRING_PREFIX)) {
sprintf(str, "%d", o->ifaddr.prefix);
}
else {
return 0;
}
*out = NCDVal_NewString(mem, str);
return 1;
}
static struct NCDModule modules[] = {
{
.type = "parse_number",
.func_new2 = func_new_parse_number,
.func_die = func_die,
.func_getvar2 = func_getvar2,
.alloc_size = sizeof(struct instance)
}, {
.type = "parse_value",
.func_new2 = func_new_parse_value,
.func_die = func_die,
.func_getvar2 = func_getvar2,
.alloc_size = sizeof(struct instance)
}, {
.type = "parse_ipv4_addr",
.func_new2 = func_new_parse_ipv4_addr,
.func_die = func_die,
.func_getvar2 = func_getvar2,
.alloc_size = sizeof(struct instance)
}, {
.type = "parse_ipv6_addr",
.func_new2 = func_new_parse_ipv6_addr,
.func_die = func_die,
.func_getvar2 = func_getvar2,
.alloc_size = sizeof(struct instance)
}, {
.type = "parse_ipv4_cidr_addr",
.func_new2 = ipv4_cidr_addr_func_new,
.func_getvar2 = ipv4_cidr_addr_func_getvar2,
.alloc_size = sizeof(struct ipv4_cidr_instance)
}, {
.type = "parse_ipv6_cidr_addr",
.func_new2 = ipv6_cidr_addr_func_new,
.func_getvar2 = ipv6_cidr_addr_func_getvar2,
.alloc_size = sizeof(struct ipv6_cidr_instance)
}, {
.type = NULL
}
};
const struct NCDModuleGroup ncdmodule_parse = {
.modules = modules,
.strings = strings
};