291 lines
8.6 KiB
C
291 lines
8.6 KiB
C
/**
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* @file address_utils.h
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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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#ifndef NCD_ADDRESS_UTILS_H
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#define NCD_ADDRESS_UTILS_H
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#include <string.h>
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#include <limits.h>
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#include <misc/debug.h>
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#include <misc/ipaddr.h>
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#include <misc/ipaddr6.h>
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#include <misc/byteorder.h>
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#include <system/BAddr.h>
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#include <system/BConnectionGeneric.h>
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#include <ncd/NCDVal.h>
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#include <ncd/extra/value_utils.h>
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typedef int (*ncd_read_bconnection_addr_CustomHandler) (void *user, NCDValRef protocol, NCDValRef data);
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static int ncd_read_baddr (NCDValRef val, BAddr *out) WARN_UNUSED;
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static NCDValRef ncd_make_baddr (BAddr addr, NCDValMem *mem);
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static int ncd_read_bconnection_addr (NCDValRef val, struct BConnection_addr *out_addr) WARN_UNUSED;
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static int ncd_read_bconnection_addr_ext (NCDValRef val, ncd_read_bconnection_addr_CustomHandler custom_handler, void *user, struct BConnection_addr *out_addr) WARN_UNUSED;
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static int ncd_read_baddr (NCDValRef val, BAddr *out)
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{
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ASSERT(!NCDVal_IsInvalid(val))
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ASSERT(out)
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if (!NCDVal_IsList(val)) {
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goto fail;
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}
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NCDValRef type_val;
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if (!NCDVal_ListReadHead(val, 1, &type_val)) {
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goto fail;
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}
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if (!NCDVal_IsString(type_val)) {
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goto fail;
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}
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BAddr addr;
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if (NCDVal_StringEquals(type_val, "none")) {
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if (!NCDVal_ListRead(val, 1, &type_val)) {
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goto fail;
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}
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addr.type = BADDR_TYPE_NONE;
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}
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else if (NCDVal_StringEquals(type_val, "ipv4")) {
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NCDValRef ipaddr_val;
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NCDValRef port_val;
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if (!NCDVal_ListRead(val, 3, &type_val, &ipaddr_val, &port_val)) {
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goto fail;
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}
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if (!NCDVal_IsString(ipaddr_val)) {
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goto fail;
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}
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addr.type = BADDR_TYPE_IPV4;
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if (!ipaddr_parse_ipv4_addr(NCDVal_StringMemRef(ipaddr_val), &addr.ipv4.ip)) {
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goto fail;
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}
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uintmax_t port;
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if (!ncd_read_uintmax(port_val, &port) || port > UINT16_MAX) {
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goto fail;
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}
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addr.ipv4.port = hton16(port);
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}
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else if (NCDVal_StringEquals(type_val, "ipv6")) {
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NCDValRef ipaddr_val;
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NCDValRef port_val;
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if (!NCDVal_ListRead(val, 3, &type_val, &ipaddr_val, &port_val)) {
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goto fail;
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}
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if (!NCDVal_IsString(ipaddr_val)) {
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goto fail;
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}
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addr.type = BADDR_TYPE_IPV6;
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struct ipv6_addr i6addr;
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if (!ipaddr6_parse_ipv6_addr(NCDVal_StringMemRef(ipaddr_val), &i6addr)) {
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goto fail;
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}
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memcpy(addr.ipv6.ip, i6addr.bytes, 16);
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uintmax_t port;
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if (!ncd_read_uintmax(port_val, &port) || port > UINT16_MAX) {
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goto fail;
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}
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addr.ipv6.port = hton16(port);
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}
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else {
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goto fail;
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}
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*out = addr;
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return 1;
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fail:
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return 0;
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}
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static NCDValRef ncd_make_baddr (BAddr addr, NCDValMem *mem)
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{
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BAddr_Assert(&addr);
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ASSERT(mem)
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NCDValRef val;
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switch (addr.type) {
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default:
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case BADDR_TYPE_NONE: {
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val = NCDVal_NewList(mem, 1);
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if (NCDVal_IsInvalid(val)) {
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goto fail;
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}
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const char *str = (addr.type == BADDR_TYPE_NONE ? "none" : "unknown");
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NCDValRef type_val = NCDVal_NewString(mem, str);
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if (NCDVal_IsInvalid(type_val)) {
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goto fail;
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}
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if (!NCDVal_ListAppend(val, type_val)) {
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goto fail;
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}
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} break;
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case BADDR_TYPE_IPV4: {
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val = NCDVal_NewList(mem, 3);
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if (NCDVal_IsInvalid(val)) {
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goto fail;
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}
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NCDValRef type_val = NCDVal_NewString(mem, "ipv4");
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if (NCDVal_IsInvalid(type_val)) {
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goto fail;
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}
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char ipaddr_buf[IPADDR_PRINT_MAX];
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ipaddr_print_addr(addr.ipv4.ip, ipaddr_buf);
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NCDValRef ipaddr_val = NCDVal_NewString(mem, ipaddr_buf);
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if (NCDVal_IsInvalid(ipaddr_val)) {
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goto fail;
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}
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NCDValRef port_val = ncd_make_uintmax(mem, ntoh16(addr.ipv4.port));
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if (NCDVal_IsInvalid(port_val)) {
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goto fail;
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}
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if (!NCDVal_ListAppend(val, type_val)) {
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goto fail;
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}
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if (!NCDVal_ListAppend(val, ipaddr_val)) {
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goto fail;
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}
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if (!NCDVal_ListAppend(val, port_val)) {
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goto fail;
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}
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} break;
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case BADDR_TYPE_IPV6: {
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val = NCDVal_NewList(mem, 3);
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if (NCDVal_IsInvalid(val)) {
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goto fail;
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}
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NCDValRef type_val = NCDVal_NewString(mem, "ipv6");
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if (NCDVal_IsInvalid(type_val)) {
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goto fail;
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}
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char ipaddr_buf[IPADDR6_PRINT_MAX];
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struct ipv6_addr i6addr;
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memcpy(i6addr.bytes, addr.ipv6.ip, 16);
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ipaddr6_print_addr(i6addr, ipaddr_buf);
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NCDValRef ipaddr_val = NCDVal_NewString(mem, ipaddr_buf);
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if (NCDVal_IsInvalid(ipaddr_val)) {
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goto fail;
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}
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NCDValRef port_val = ncd_make_uintmax(mem, ntoh16(addr.ipv6.port));
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if (NCDVal_IsInvalid(port_val)) {
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goto fail;
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}
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if (!NCDVal_ListAppend(val, type_val)) {
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goto fail;
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}
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if (!NCDVal_ListAppend(val, ipaddr_val)) {
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goto fail;
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}
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if (!NCDVal_ListAppend(val, port_val)) {
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goto fail;
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}
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} break;
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}
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return val;
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fail:
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return NCDVal_NewInvalid();
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}
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static int ncd_read_bconnection_addr (NCDValRef val, struct BConnection_addr *out_addr)
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{
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return ncd_read_bconnection_addr_ext(val, NULL, NULL, out_addr);
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}
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static int ncd_read_bconnection_addr_ext (NCDValRef val, ncd_read_bconnection_addr_CustomHandler custom_handler, void *user, struct BConnection_addr *out_addr)
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{
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ASSERT(!NCDVal_IsInvalid(val))
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if (!NCDVal_IsList(val)) {
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goto fail;
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}
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NCDValRef protocol_arg;
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NCDValRef data_arg;
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if (!NCDVal_ListRead(val, 2, &protocol_arg, &data_arg)) {
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goto fail;
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}
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if (!NCDVal_IsString(protocol_arg)) {
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goto fail;
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}
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if (NCDVal_StringEquals(protocol_arg, "unix")) {
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if (!NCDVal_IsStringNoNulls(data_arg)) {
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goto fail;
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}
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*out_addr = BConnection_addr_unix(NCDVal_StringMemRef(data_arg));
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}
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else if (NCDVal_StringEquals(protocol_arg, "tcp")) {
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BAddr baddr;
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if (!ncd_read_baddr(data_arg, &baddr)) {
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goto fail;
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}
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*out_addr = BConnection_addr_baddr(baddr);
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}
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else {
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if (!custom_handler || !custom_handler(user, protocol_arg, data_arg)) {
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goto fail;
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}
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out_addr->type = -1;
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}
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return 1;
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fail:
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return 0;
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}
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#endif
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