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