mbed-os5 only for TYBLE16
Dependents: TYBLE16_simple_data_logger TYBLE16_MP3_Air
features/netsocket/nsapi_dns.cpp@1:9db0e321a9f4, 2019-12-31 (annotated)
- Committer:
- kenjiArai
- Date:
- Tue Dec 31 06:02:27 2019 +0000
- Revision:
- 1:9db0e321a9f4
- Parent:
- 0:5b88d5760320
updated based on mbed-os5.15.0
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
kenjiArai | 0:5b88d5760320 | 1 | /* nsapi_dns.cpp |
kenjiArai | 0:5b88d5760320 | 2 | * Original work Copyright (c) 2013 Henry Leinen (henry[dot]leinen [at] online [dot] de) |
kenjiArai | 0:5b88d5760320 | 3 | * Modified work Copyright (c) 2015 ARM Limited |
kenjiArai | 0:5b88d5760320 | 4 | * |
kenjiArai | 0:5b88d5760320 | 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
kenjiArai | 0:5b88d5760320 | 6 | * you may not use this file except in compliance with the License. |
kenjiArai | 0:5b88d5760320 | 7 | * You may obtain a copy of the License at |
kenjiArai | 0:5b88d5760320 | 8 | * |
kenjiArai | 0:5b88d5760320 | 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
kenjiArai | 0:5b88d5760320 | 10 | * |
kenjiArai | 0:5b88d5760320 | 11 | * Unless required by applicable law or agreed to in writing, software |
kenjiArai | 0:5b88d5760320 | 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
kenjiArai | 0:5b88d5760320 | 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
kenjiArai | 0:5b88d5760320 | 14 | * See the License for the specific language governing permissions and |
kenjiArai | 0:5b88d5760320 | 15 | * limitations under the License. |
kenjiArai | 0:5b88d5760320 | 16 | */ |
kenjiArai | 0:5b88d5760320 | 17 | |
kenjiArai | 0:5b88d5760320 | 18 | /* Declare __STDC_LIMIT_MACROS so stdint.h defines INT32_MAX when using C++ */ |
kenjiArai | 0:5b88d5760320 | 19 | #define __STDC_LIMIT_MACROS |
kenjiArai | 0:5b88d5760320 | 20 | |
kenjiArai | 0:5b88d5760320 | 21 | #include "nsapi_dns.h" |
kenjiArai | 0:5b88d5760320 | 22 | #include "netsocket/UDPSocket.h" |
kenjiArai | 0:5b88d5760320 | 23 | #include <string.h> |
kenjiArai | 0:5b88d5760320 | 24 | #include <stdlib.h> |
kenjiArai | 0:5b88d5760320 | 25 | #include <stdio.h> |
kenjiArai | 1:9db0e321a9f4 | 26 | #include <stdint.h> |
kenjiArai | 0:5b88d5760320 | 27 | #include "mbed_shared_queues.h" |
kenjiArai | 0:5b88d5760320 | 28 | #include "events/EventQueue.h" |
kenjiArai | 0:5b88d5760320 | 29 | #include "OnboardNetworkStack.h" |
kenjiArai | 0:5b88d5760320 | 30 | #include "Kernel.h" |
kenjiArai | 0:5b88d5760320 | 31 | #include "PlatformMutex.h" |
kenjiArai | 0:5b88d5760320 | 32 | #include "SingletonPtr.h" |
kenjiArai | 0:5b88d5760320 | 33 | |
kenjiArai | 0:5b88d5760320 | 34 | #define CLASS_IN 1 |
kenjiArai | 0:5b88d5760320 | 35 | |
kenjiArai | 0:5b88d5760320 | 36 | #define RR_A 1 |
kenjiArai | 0:5b88d5760320 | 37 | #define RR_AAAA 28 |
kenjiArai | 0:5b88d5760320 | 38 | |
kenjiArai | 0:5b88d5760320 | 39 | // DNS options |
kenjiArai | 0:5b88d5760320 | 40 | #define DNS_BUFFER_SIZE 512 |
kenjiArai | 0:5b88d5760320 | 41 | #define DNS_SERVERS_SIZE 5 |
kenjiArai | 0:5b88d5760320 | 42 | #define DNS_RESPONSE_MIN_SIZE 12 |
kenjiArai | 0:5b88d5760320 | 43 | #define DNS_STACK_SERVERS_NUM 5 |
kenjiArai | 0:5b88d5760320 | 44 | #define DNS_QUERY_QUEUE_SIZE 5 |
kenjiArai | 0:5b88d5760320 | 45 | #define DNS_HOST_NAME_MAX_LEN 255 |
kenjiArai | 0:5b88d5760320 | 46 | #define DNS_TIMER_TIMEOUT 100 |
kenjiArai | 0:5b88d5760320 | 47 | |
kenjiArai | 0:5b88d5760320 | 48 | struct DNS_CACHE { |
kenjiArai | 0:5b88d5760320 | 49 | nsapi_addr_t address; |
kenjiArai | 0:5b88d5760320 | 50 | char *host; |
kenjiArai | 0:5b88d5760320 | 51 | uint64_t expires; /*!< time to live in milliseconds */ |
kenjiArai | 0:5b88d5760320 | 52 | uint64_t accessed; /*!< last accessed */ |
kenjiArai | 0:5b88d5760320 | 53 | }; |
kenjiArai | 0:5b88d5760320 | 54 | |
kenjiArai | 0:5b88d5760320 | 55 | struct SOCKET_CB_DATA { |
kenjiArai | 0:5b88d5760320 | 56 | call_in_callback_cb_t call_in_cb; |
kenjiArai | 0:5b88d5760320 | 57 | NetworkStack *stack; |
kenjiArai | 0:5b88d5760320 | 58 | }; |
kenjiArai | 0:5b88d5760320 | 59 | |
kenjiArai | 0:5b88d5760320 | 60 | enum dns_state { |
kenjiArai | 0:5b88d5760320 | 61 | DNS_CREATED, /*!< created, not yet making query to network */ |
kenjiArai | 0:5b88d5760320 | 62 | DNS_INITIATED, /*!< making query to network */ |
kenjiArai | 0:5b88d5760320 | 63 | DNS_CANCELLED /*!< cancelled, callback will not be called */ |
kenjiArai | 0:5b88d5760320 | 64 | }; |
kenjiArai | 0:5b88d5760320 | 65 | |
kenjiArai | 0:5b88d5760320 | 66 | struct DNS_QUERY { |
kenjiArai | 1:9db0e321a9f4 | 67 | intptr_t unique_id; |
kenjiArai | 0:5b88d5760320 | 68 | nsapi_error_t status; |
kenjiArai | 0:5b88d5760320 | 69 | NetworkStack *stack; |
kenjiArai | 0:5b88d5760320 | 70 | char *host; |
kenjiArai | 0:5b88d5760320 | 71 | const char *interface_name; |
kenjiArai | 0:5b88d5760320 | 72 | NetworkStack::hostbyname_cb_t callback; |
kenjiArai | 0:5b88d5760320 | 73 | call_in_callback_cb_t call_in_cb; |
kenjiArai | 0:5b88d5760320 | 74 | nsapi_size_t addr_count; |
kenjiArai | 0:5b88d5760320 | 75 | nsapi_version_t version; |
kenjiArai | 0:5b88d5760320 | 76 | UDPSocket *socket; |
kenjiArai | 0:5b88d5760320 | 77 | SOCKET_CB_DATA *socket_cb_data; |
kenjiArai | 0:5b88d5760320 | 78 | nsapi_addr_t *addrs; |
kenjiArai | 0:5b88d5760320 | 79 | uint32_t ttl; |
kenjiArai | 0:5b88d5760320 | 80 | uint32_t total_timeout; |
kenjiArai | 0:5b88d5760320 | 81 | uint32_t socket_timeout; |
kenjiArai | 0:5b88d5760320 | 82 | uint16_t dns_message_id; |
kenjiArai | 0:5b88d5760320 | 83 | uint8_t dns_server; |
kenjiArai | 0:5b88d5760320 | 84 | uint8_t retries; |
kenjiArai | 0:5b88d5760320 | 85 | uint8_t total_attempts; |
kenjiArai | 0:5b88d5760320 | 86 | uint8_t send_success; |
kenjiArai | 0:5b88d5760320 | 87 | uint8_t count; |
kenjiArai | 0:5b88d5760320 | 88 | dns_state state; |
kenjiArai | 0:5b88d5760320 | 89 | }; |
kenjiArai | 0:5b88d5760320 | 90 | |
kenjiArai | 0:5b88d5760320 | 91 | static void nsapi_dns_cache_add(const char *host, nsapi_addr_t *address, uint32_t ttl); |
kenjiArai | 0:5b88d5760320 | 92 | static nsapi_size_or_error_t nsapi_dns_cache_find(const char *host, nsapi_version_t version, nsapi_addr_t *address); |
kenjiArai | 1:9db0e321a9f4 | 93 | static void nsapi_dns_cache_reset(); |
kenjiArai | 0:5b88d5760320 | 94 | |
kenjiArai | 0:5b88d5760320 | 95 | static nsapi_error_t nsapi_dns_get_server_addr(NetworkStack *stack, uint8_t *index, uint8_t *total_attempts, uint8_t *send_success, SocketAddress *dns_addr, const char *interface_name); |
kenjiArai | 0:5b88d5760320 | 96 | |
kenjiArai | 0:5b88d5760320 | 97 | static void nsapi_dns_query_async_create(void *ptr); |
kenjiArai | 1:9db0e321a9f4 | 98 | static nsapi_error_t nsapi_dns_query_async_delete(intptr_t unique_id); |
kenjiArai | 0:5b88d5760320 | 99 | static void nsapi_dns_query_async_send(void *ptr); |
kenjiArai | 0:5b88d5760320 | 100 | static void nsapi_dns_query_async_timeout(void); |
kenjiArai | 0:5b88d5760320 | 101 | static void nsapi_dns_query_async_resp(DNS_QUERY *query, nsapi_error_t status, SocketAddress *address); |
kenjiArai | 0:5b88d5760320 | 102 | static void nsapi_dns_query_async_socket_callback(void *ptr); |
kenjiArai | 0:5b88d5760320 | 103 | static void nsapi_dns_query_async_socket_callback_handle(NetworkStack *stack); |
kenjiArai | 0:5b88d5760320 | 104 | static void nsapi_dns_query_async_response(void *ptr); |
kenjiArai | 0:5b88d5760320 | 105 | static void nsapi_dns_query_async_initiate_next(void); |
kenjiArai | 0:5b88d5760320 | 106 | |
kenjiArai | 0:5b88d5760320 | 107 | // *INDENT-OFF* |
kenjiArai | 0:5b88d5760320 | 108 | static nsapi_addr_t dns_servers[DNS_SERVERS_SIZE] = { |
kenjiArai | 0:5b88d5760320 | 109 | {NSAPI_IPv4, {8, 8, 8, 8}}, // Google |
kenjiArai | 0:5b88d5760320 | 110 | {NSAPI_IPv6, {0x20,0x01, 0x48,0x60, 0x48,0x60, 0,0, // Google |
kenjiArai | 0:5b88d5760320 | 111 | 0,0, 0,0, 0,0, 0x88,0x88}}, |
kenjiArai | 0:5b88d5760320 | 112 | {NSAPI_IPv4, {209, 244, 0, 3}}, // Level 3 |
kenjiArai | 0:5b88d5760320 | 113 | {NSAPI_IPv4, {84, 200, 69, 80}}, // DNS.WATCH |
kenjiArai | 0:5b88d5760320 | 114 | {NSAPI_IPv6, {0x20,0x01, 0x16,0x08, 0,0x10, 0,0x25, // DNS.WATCH |
kenjiArai | 0:5b88d5760320 | 115 | 0,0, 0,0, 0x1c,0x04, 0xb1,0x2f}}, |
kenjiArai | 0:5b88d5760320 | 116 | }; |
kenjiArai | 0:5b88d5760320 | 117 | // *INDENT-ON* |
kenjiArai | 0:5b88d5760320 | 118 | |
kenjiArai | 0:5b88d5760320 | 119 | #if (MBED_CONF_NSAPI_DNS_CACHE_SIZE > 0) |
kenjiArai | 0:5b88d5760320 | 120 | static DNS_CACHE *dns_cache[MBED_CONF_NSAPI_DNS_CACHE_SIZE]; |
kenjiArai | 0:5b88d5760320 | 121 | // Protects cache shared between blocking and asynchronous calls |
kenjiArai | 0:5b88d5760320 | 122 | static SingletonPtr<PlatformMutex> dns_cache_mutex; |
kenjiArai | 0:5b88d5760320 | 123 | #endif |
kenjiArai | 0:5b88d5760320 | 124 | |
kenjiArai | 0:5b88d5760320 | 125 | static uint16_t dns_message_id = 1; |
kenjiArai | 1:9db0e321a9f4 | 126 | static intptr_t dns_unique_id = 1; |
kenjiArai | 0:5b88d5760320 | 127 | static DNS_QUERY *dns_query_queue[DNS_QUERY_QUEUE_SIZE]; |
kenjiArai | 0:5b88d5760320 | 128 | // Protects from several threads running asynchronous DNS |
kenjiArai | 0:5b88d5760320 | 129 | static SingletonPtr<PlatformMutex> dns_mutex; |
kenjiArai | 0:5b88d5760320 | 130 | static SingletonPtr<call_in_callback_cb_t> dns_call_in; |
kenjiArai | 0:5b88d5760320 | 131 | static bool dns_timer_running = false; |
kenjiArai | 0:5b88d5760320 | 132 | |
kenjiArai | 0:5b88d5760320 | 133 | // DNS server configuration |
kenjiArai | 0:5b88d5760320 | 134 | extern "C" nsapi_error_t nsapi_dns_add_server(nsapi_addr_t addr, const char *interface_name) |
kenjiArai | 0:5b88d5760320 | 135 | { |
kenjiArai | 1:9db0e321a9f4 | 136 | // check if addr was already added |
kenjiArai | 1:9db0e321a9f4 | 137 | for (int i = 0; i < DNS_SERVERS_SIZE; i++) { |
kenjiArai | 1:9db0e321a9f4 | 138 | if (memcmp(&addr, &dns_servers[i], sizeof(nsapi_addr_t)) == 0) { |
kenjiArai | 1:9db0e321a9f4 | 139 | return NSAPI_ERROR_OK; |
kenjiArai | 1:9db0e321a9f4 | 140 | } |
kenjiArai | 1:9db0e321a9f4 | 141 | } |
kenjiArai | 1:9db0e321a9f4 | 142 | |
kenjiArai | 0:5b88d5760320 | 143 | memmove(&dns_servers[1], &dns_servers[0], |
kenjiArai | 0:5b88d5760320 | 144 | (DNS_SERVERS_SIZE - 1)*sizeof(nsapi_addr_t)); |
kenjiArai | 0:5b88d5760320 | 145 | |
kenjiArai | 0:5b88d5760320 | 146 | dns_servers[0] = addr; |
kenjiArai | 0:5b88d5760320 | 147 | return NSAPI_ERROR_OK; |
kenjiArai | 0:5b88d5760320 | 148 | } |
kenjiArai | 0:5b88d5760320 | 149 | |
kenjiArai | 0:5b88d5760320 | 150 | |
kenjiArai | 0:5b88d5760320 | 151 | // DNS packet parsing |
kenjiArai | 0:5b88d5760320 | 152 | static void dns_append_byte(uint8_t **p, uint8_t byte) |
kenjiArai | 0:5b88d5760320 | 153 | { |
kenjiArai | 0:5b88d5760320 | 154 | *(*p)++ = byte; |
kenjiArai | 0:5b88d5760320 | 155 | } |
kenjiArai | 0:5b88d5760320 | 156 | |
kenjiArai | 0:5b88d5760320 | 157 | static void dns_append_word(uint8_t **p, uint16_t word) |
kenjiArai | 0:5b88d5760320 | 158 | { |
kenjiArai | 0:5b88d5760320 | 159 | |
kenjiArai | 0:5b88d5760320 | 160 | dns_append_byte(p, 0xff & (word >> 8)); |
kenjiArai | 0:5b88d5760320 | 161 | dns_append_byte(p, 0xff & (word >> 0)); |
kenjiArai | 0:5b88d5760320 | 162 | } |
kenjiArai | 0:5b88d5760320 | 163 | |
kenjiArai | 0:5b88d5760320 | 164 | static void dns_append_name(uint8_t **p, const char *name, uint8_t len) |
kenjiArai | 0:5b88d5760320 | 165 | { |
kenjiArai | 0:5b88d5760320 | 166 | dns_append_byte(p, len); |
kenjiArai | 0:5b88d5760320 | 167 | memcpy(*p, name, len); |
kenjiArai | 0:5b88d5760320 | 168 | *p += len; |
kenjiArai | 0:5b88d5760320 | 169 | } |
kenjiArai | 0:5b88d5760320 | 170 | |
kenjiArai | 0:5b88d5760320 | 171 | static uint8_t dns_scan_byte(const uint8_t **p) |
kenjiArai | 0:5b88d5760320 | 172 | { |
kenjiArai | 0:5b88d5760320 | 173 | return *(*p)++; |
kenjiArai | 0:5b88d5760320 | 174 | } |
kenjiArai | 0:5b88d5760320 | 175 | |
kenjiArai | 0:5b88d5760320 | 176 | static uint16_t dns_scan_word(const uint8_t **p) |
kenjiArai | 0:5b88d5760320 | 177 | { |
kenjiArai | 0:5b88d5760320 | 178 | uint16_t a = dns_scan_byte(p); |
kenjiArai | 0:5b88d5760320 | 179 | uint16_t b = dns_scan_byte(p); |
kenjiArai | 0:5b88d5760320 | 180 | return (a << 8) | b; |
kenjiArai | 0:5b88d5760320 | 181 | } |
kenjiArai | 0:5b88d5760320 | 182 | |
kenjiArai | 0:5b88d5760320 | 183 | static uint32_t dns_scan_word32(const uint8_t **p) |
kenjiArai | 0:5b88d5760320 | 184 | { |
kenjiArai | 0:5b88d5760320 | 185 | uint32_t value = dns_scan_byte(p) << 24; |
kenjiArai | 0:5b88d5760320 | 186 | value |= dns_scan_byte(p) << 16; |
kenjiArai | 0:5b88d5760320 | 187 | value |= dns_scan_byte(p) << 8; |
kenjiArai | 0:5b88d5760320 | 188 | value |= dns_scan_byte(p); |
kenjiArai | 0:5b88d5760320 | 189 | |
kenjiArai | 0:5b88d5760320 | 190 | return value; |
kenjiArai | 0:5b88d5760320 | 191 | } |
kenjiArai | 0:5b88d5760320 | 192 | |
kenjiArai | 0:5b88d5760320 | 193 | static int dns_append_question(uint8_t *ptr, uint16_t id, const char *host, nsapi_version_t version) |
kenjiArai | 0:5b88d5760320 | 194 | { |
kenjiArai | 0:5b88d5760320 | 195 | uint8_t *s_ptr = ptr; |
kenjiArai | 0:5b88d5760320 | 196 | uint8_t **p = &ptr; |
kenjiArai | 0:5b88d5760320 | 197 | |
kenjiArai | 0:5b88d5760320 | 198 | // fill the header |
kenjiArai | 0:5b88d5760320 | 199 | dns_append_word(p, id); // id = 1 |
kenjiArai | 0:5b88d5760320 | 200 | dns_append_word(p, 0x0100); // flags = recursion required |
kenjiArai | 0:5b88d5760320 | 201 | dns_append_word(p, 1); // qdcount = 1 |
kenjiArai | 0:5b88d5760320 | 202 | dns_append_word(p, 0); // ancount = 0 |
kenjiArai | 0:5b88d5760320 | 203 | dns_append_word(p, 0); // nscount = 0 |
kenjiArai | 0:5b88d5760320 | 204 | dns_append_word(p, 0); // arcount = 0 |
kenjiArai | 0:5b88d5760320 | 205 | |
kenjiArai | 0:5b88d5760320 | 206 | // fill out the question names |
kenjiArai | 0:5b88d5760320 | 207 | while (host[0]) { |
kenjiArai | 0:5b88d5760320 | 208 | size_t label_len = strcspn(host, "."); |
kenjiArai | 0:5b88d5760320 | 209 | dns_append_name(p, host, label_len); |
kenjiArai | 0:5b88d5760320 | 210 | host += label_len + (host[label_len] == '.'); |
kenjiArai | 0:5b88d5760320 | 211 | } |
kenjiArai | 0:5b88d5760320 | 212 | |
kenjiArai | 0:5b88d5760320 | 213 | dns_append_byte(p, 0); |
kenjiArai | 0:5b88d5760320 | 214 | |
kenjiArai | 0:5b88d5760320 | 215 | // fill out question footer |
kenjiArai | 0:5b88d5760320 | 216 | if (version != NSAPI_IPv6) { |
kenjiArai | 0:5b88d5760320 | 217 | dns_append_word(p, RR_A); // qtype = ipv4 |
kenjiArai | 0:5b88d5760320 | 218 | } else { |
kenjiArai | 0:5b88d5760320 | 219 | dns_append_word(p, RR_AAAA); // qtype = ipv6 |
kenjiArai | 0:5b88d5760320 | 220 | } |
kenjiArai | 0:5b88d5760320 | 221 | dns_append_word(p, CLASS_IN); |
kenjiArai | 0:5b88d5760320 | 222 | |
kenjiArai | 0:5b88d5760320 | 223 | return *p - s_ptr; |
kenjiArai | 0:5b88d5760320 | 224 | } |
kenjiArai | 0:5b88d5760320 | 225 | |
kenjiArai | 0:5b88d5760320 | 226 | static int dns_scan_response(const uint8_t *ptr, uint16_t exp_id, uint32_t *ttl, nsapi_addr_t *addr, unsigned addr_count) |
kenjiArai | 0:5b88d5760320 | 227 | { |
kenjiArai | 0:5b88d5760320 | 228 | const uint8_t **p = &ptr; |
kenjiArai | 0:5b88d5760320 | 229 | |
kenjiArai | 0:5b88d5760320 | 230 | // scan header |
kenjiArai | 0:5b88d5760320 | 231 | uint16_t id = dns_scan_word(p); |
kenjiArai | 0:5b88d5760320 | 232 | uint16_t flags = dns_scan_word(p); |
kenjiArai | 0:5b88d5760320 | 233 | bool qr = 0x1 & (flags >> 15); |
kenjiArai | 0:5b88d5760320 | 234 | uint8_t opcode = 0xf & (flags >> 11); |
kenjiArai | 0:5b88d5760320 | 235 | uint8_t rcode = 0xf & (flags >> 0); |
kenjiArai | 0:5b88d5760320 | 236 | |
kenjiArai | 0:5b88d5760320 | 237 | uint16_t qdcount = dns_scan_word(p); // qdcount |
kenjiArai | 0:5b88d5760320 | 238 | uint16_t ancount = dns_scan_word(p); // ancount |
kenjiArai | 0:5b88d5760320 | 239 | dns_scan_word(p); // nscount |
kenjiArai | 0:5b88d5760320 | 240 | dns_scan_word(p); // arcount |
kenjiArai | 0:5b88d5760320 | 241 | |
kenjiArai | 0:5b88d5760320 | 242 | // verify header is response to query |
kenjiArai | 0:5b88d5760320 | 243 | if (!(id == exp_id && qr && opcode == 0)) { |
kenjiArai | 0:5b88d5760320 | 244 | return -1; |
kenjiArai | 0:5b88d5760320 | 245 | } |
kenjiArai | 0:5b88d5760320 | 246 | |
kenjiArai | 0:5b88d5760320 | 247 | if (rcode != 0) { |
kenjiArai | 0:5b88d5760320 | 248 | return 0; |
kenjiArai | 0:5b88d5760320 | 249 | } |
kenjiArai | 0:5b88d5760320 | 250 | |
kenjiArai | 0:5b88d5760320 | 251 | // skip questions |
kenjiArai | 0:5b88d5760320 | 252 | for (int i = 0; i < qdcount; i++) { |
kenjiArai | 0:5b88d5760320 | 253 | while (true) { |
kenjiArai | 0:5b88d5760320 | 254 | uint8_t len = dns_scan_byte(p); |
kenjiArai | 0:5b88d5760320 | 255 | if (len == 0) { |
kenjiArai | 0:5b88d5760320 | 256 | break; |
kenjiArai | 0:5b88d5760320 | 257 | } |
kenjiArai | 0:5b88d5760320 | 258 | |
kenjiArai | 0:5b88d5760320 | 259 | *p += len; |
kenjiArai | 0:5b88d5760320 | 260 | } |
kenjiArai | 0:5b88d5760320 | 261 | |
kenjiArai | 0:5b88d5760320 | 262 | dns_scan_word(p); // qtype |
kenjiArai | 0:5b88d5760320 | 263 | dns_scan_word(p); // qclass |
kenjiArai | 0:5b88d5760320 | 264 | } |
kenjiArai | 0:5b88d5760320 | 265 | |
kenjiArai | 0:5b88d5760320 | 266 | // scan each response |
kenjiArai | 0:5b88d5760320 | 267 | unsigned count = 0; |
kenjiArai | 0:5b88d5760320 | 268 | |
kenjiArai | 0:5b88d5760320 | 269 | for (int i = 0; i < ancount && count < addr_count; i++) { |
kenjiArai | 0:5b88d5760320 | 270 | while (true) { |
kenjiArai | 0:5b88d5760320 | 271 | uint8_t len = dns_scan_byte(p); |
kenjiArai | 0:5b88d5760320 | 272 | if (len == 0) { |
kenjiArai | 0:5b88d5760320 | 273 | break; |
kenjiArai | 0:5b88d5760320 | 274 | } else if (len & 0xc0) { // this is link |
kenjiArai | 0:5b88d5760320 | 275 | dns_scan_byte(p); |
kenjiArai | 0:5b88d5760320 | 276 | break; |
kenjiArai | 0:5b88d5760320 | 277 | } |
kenjiArai | 0:5b88d5760320 | 278 | |
kenjiArai | 0:5b88d5760320 | 279 | *p += len; |
kenjiArai | 0:5b88d5760320 | 280 | } |
kenjiArai | 0:5b88d5760320 | 281 | |
kenjiArai | 0:5b88d5760320 | 282 | uint16_t rtype = dns_scan_word(p); // rtype |
kenjiArai | 0:5b88d5760320 | 283 | uint16_t rclass = dns_scan_word(p); // rclass |
kenjiArai | 0:5b88d5760320 | 284 | uint32_t ttl_val = dns_scan_word32(p); // ttl |
kenjiArai | 0:5b88d5760320 | 285 | uint16_t rdlength = dns_scan_word(p); // rdlength |
kenjiArai | 0:5b88d5760320 | 286 | |
kenjiArai | 0:5b88d5760320 | 287 | if (i == 0) { |
kenjiArai | 0:5b88d5760320 | 288 | // Is interested only on first address that is stored to cache |
kenjiArai | 0:5b88d5760320 | 289 | if (ttl_val > INT32_MAX) { |
kenjiArai | 0:5b88d5760320 | 290 | ttl_val = INT32_MAX; |
kenjiArai | 0:5b88d5760320 | 291 | } |
kenjiArai | 0:5b88d5760320 | 292 | *ttl = ttl_val; |
kenjiArai | 0:5b88d5760320 | 293 | } |
kenjiArai | 0:5b88d5760320 | 294 | |
kenjiArai | 0:5b88d5760320 | 295 | if (rtype == RR_A && rclass == CLASS_IN && rdlength == NSAPI_IPv4_BYTES) { |
kenjiArai | 0:5b88d5760320 | 296 | // accept A record |
kenjiArai | 0:5b88d5760320 | 297 | addr->version = NSAPI_IPv4; |
kenjiArai | 0:5b88d5760320 | 298 | for (int i = 0; i < NSAPI_IPv4_BYTES; i++) { |
kenjiArai | 0:5b88d5760320 | 299 | addr->bytes[i] = dns_scan_byte(p); |
kenjiArai | 0:5b88d5760320 | 300 | } |
kenjiArai | 0:5b88d5760320 | 301 | |
kenjiArai | 0:5b88d5760320 | 302 | addr += 1; |
kenjiArai | 0:5b88d5760320 | 303 | count += 1; |
kenjiArai | 0:5b88d5760320 | 304 | } else if (rtype == RR_AAAA && rclass == CLASS_IN && rdlength == NSAPI_IPv6_BYTES) { |
kenjiArai | 0:5b88d5760320 | 305 | // accept AAAA record |
kenjiArai | 0:5b88d5760320 | 306 | addr->version = NSAPI_IPv6; |
kenjiArai | 0:5b88d5760320 | 307 | for (int i = 0; i < NSAPI_IPv6_BYTES; i++) { |
kenjiArai | 0:5b88d5760320 | 308 | addr->bytes[i] = dns_scan_byte(p); |
kenjiArai | 0:5b88d5760320 | 309 | } |
kenjiArai | 0:5b88d5760320 | 310 | |
kenjiArai | 0:5b88d5760320 | 311 | addr += 1; |
kenjiArai | 0:5b88d5760320 | 312 | count += 1; |
kenjiArai | 0:5b88d5760320 | 313 | } else { |
kenjiArai | 0:5b88d5760320 | 314 | // skip unrecognized records |
kenjiArai | 0:5b88d5760320 | 315 | *p += rdlength; |
kenjiArai | 0:5b88d5760320 | 316 | } |
kenjiArai | 0:5b88d5760320 | 317 | } |
kenjiArai | 0:5b88d5760320 | 318 | |
kenjiArai | 0:5b88d5760320 | 319 | return count; |
kenjiArai | 0:5b88d5760320 | 320 | } |
kenjiArai | 0:5b88d5760320 | 321 | |
kenjiArai | 0:5b88d5760320 | 322 | static void nsapi_dns_cache_add(const char *host, nsapi_addr_t *address, uint32_t ttl) |
kenjiArai | 0:5b88d5760320 | 323 | { |
kenjiArai | 0:5b88d5760320 | 324 | #if (MBED_CONF_NSAPI_DNS_CACHE_SIZE > 0) |
kenjiArai | 0:5b88d5760320 | 325 | // RFC 1034: if TTL is zero, entry is not added to cache |
kenjiArai | 0:5b88d5760320 | 326 | if (ttl == 0) { |
kenjiArai | 0:5b88d5760320 | 327 | return; |
kenjiArai | 0:5b88d5760320 | 328 | } |
kenjiArai | 0:5b88d5760320 | 329 | |
kenjiArai | 0:5b88d5760320 | 330 | // Checks if already cached |
kenjiArai | 0:5b88d5760320 | 331 | if (nsapi_dns_cache_find(host, address->version, NULL) == NSAPI_ERROR_OK) { |
kenjiArai | 0:5b88d5760320 | 332 | return; |
kenjiArai | 0:5b88d5760320 | 333 | } |
kenjiArai | 0:5b88d5760320 | 334 | |
kenjiArai | 0:5b88d5760320 | 335 | dns_cache_mutex->lock(); |
kenjiArai | 0:5b88d5760320 | 336 | |
kenjiArai | 0:5b88d5760320 | 337 | int index = -1; |
kenjiArai | 0:5b88d5760320 | 338 | uint64_t accessed = UINT64_MAX; |
kenjiArai | 0:5b88d5760320 | 339 | |
kenjiArai | 0:5b88d5760320 | 340 | // Finds free or last accessed entry |
kenjiArai | 0:5b88d5760320 | 341 | for (int i = 0; i < MBED_CONF_NSAPI_DNS_CACHE_SIZE; i++) { |
kenjiArai | 0:5b88d5760320 | 342 | if (!dns_cache[i]) { |
kenjiArai | 0:5b88d5760320 | 343 | index = i; |
kenjiArai | 0:5b88d5760320 | 344 | break; |
kenjiArai | 0:5b88d5760320 | 345 | } else if (dns_cache[i]->accessed <= accessed) { |
kenjiArai | 0:5b88d5760320 | 346 | accessed = dns_cache[i]->accessed; |
kenjiArai | 0:5b88d5760320 | 347 | index = i; |
kenjiArai | 0:5b88d5760320 | 348 | } |
kenjiArai | 0:5b88d5760320 | 349 | } |
kenjiArai | 0:5b88d5760320 | 350 | |
kenjiArai | 0:5b88d5760320 | 351 | if (index < 0) { |
kenjiArai | 0:5b88d5760320 | 352 | dns_cache_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 353 | return; |
kenjiArai | 0:5b88d5760320 | 354 | } |
kenjiArai | 0:5b88d5760320 | 355 | |
kenjiArai | 0:5b88d5760320 | 356 | // Allocates in case entry is free, otherwise reuses |
kenjiArai | 0:5b88d5760320 | 357 | if (!dns_cache[index]) { |
kenjiArai | 0:5b88d5760320 | 358 | dns_cache[index] = new (std::nothrow) DNS_CACHE; |
kenjiArai | 0:5b88d5760320 | 359 | } else { |
kenjiArai | 0:5b88d5760320 | 360 | delete dns_cache[index]->host; |
kenjiArai | 0:5b88d5760320 | 361 | } |
kenjiArai | 0:5b88d5760320 | 362 | |
kenjiArai | 0:5b88d5760320 | 363 | if (dns_cache[index]) { |
kenjiArai | 0:5b88d5760320 | 364 | dns_cache[index]->address = *address; |
kenjiArai | 0:5b88d5760320 | 365 | dns_cache[index]->host = new (std::nothrow) char[strlen(host) + 1]; |
kenjiArai | 0:5b88d5760320 | 366 | strcpy(dns_cache[index]->host, host); |
kenjiArai | 0:5b88d5760320 | 367 | uint64_t ms_count = rtos::Kernel::get_ms_count(); |
kenjiArai | 0:5b88d5760320 | 368 | dns_cache[index]->expires = ms_count + (uint64_t) ttl * 1000; |
kenjiArai | 0:5b88d5760320 | 369 | dns_cache[index]->accessed = ms_count; |
kenjiArai | 0:5b88d5760320 | 370 | } |
kenjiArai | 0:5b88d5760320 | 371 | |
kenjiArai | 0:5b88d5760320 | 372 | dns_cache_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 373 | #endif |
kenjiArai | 0:5b88d5760320 | 374 | } |
kenjiArai | 0:5b88d5760320 | 375 | |
kenjiArai | 0:5b88d5760320 | 376 | static nsapi_error_t nsapi_dns_cache_find(const char *host, nsapi_version_t version, nsapi_addr_t *address) |
kenjiArai | 0:5b88d5760320 | 377 | { |
kenjiArai | 0:5b88d5760320 | 378 | nsapi_error_t ret_val = NSAPI_ERROR_NO_ADDRESS; |
kenjiArai | 0:5b88d5760320 | 379 | |
kenjiArai | 0:5b88d5760320 | 380 | #if (MBED_CONF_NSAPI_DNS_CACHE_SIZE > 0) |
kenjiArai | 0:5b88d5760320 | 381 | dns_cache_mutex->lock(); |
kenjiArai | 0:5b88d5760320 | 382 | |
kenjiArai | 0:5b88d5760320 | 383 | for (int i = 0; i < MBED_CONF_NSAPI_DNS_CACHE_SIZE; i++) { |
kenjiArai | 0:5b88d5760320 | 384 | if (dns_cache[i]) { |
kenjiArai | 0:5b88d5760320 | 385 | uint64_t ms_count = rtos::Kernel::get_ms_count(); |
kenjiArai | 0:5b88d5760320 | 386 | // Checks all entries for expired entries |
kenjiArai | 0:5b88d5760320 | 387 | if (ms_count > dns_cache[i]->expires) { |
kenjiArai | 0:5b88d5760320 | 388 | delete dns_cache[i]->host; |
kenjiArai | 0:5b88d5760320 | 389 | delete dns_cache[i]; |
kenjiArai | 0:5b88d5760320 | 390 | dns_cache[i] = NULL; |
kenjiArai | 0:5b88d5760320 | 391 | } else if ((version == NSAPI_UNSPEC || version == dns_cache[i]->address.version) && |
kenjiArai | 0:5b88d5760320 | 392 | strcmp(dns_cache[i]->host, host) == 0) { |
kenjiArai | 0:5b88d5760320 | 393 | if (address) { |
kenjiArai | 0:5b88d5760320 | 394 | *address = dns_cache[i]->address; |
kenjiArai | 0:5b88d5760320 | 395 | } |
kenjiArai | 0:5b88d5760320 | 396 | dns_cache[i]->accessed = ms_count; |
kenjiArai | 0:5b88d5760320 | 397 | ret_val = NSAPI_ERROR_OK; |
kenjiArai | 0:5b88d5760320 | 398 | } |
kenjiArai | 0:5b88d5760320 | 399 | } |
kenjiArai | 0:5b88d5760320 | 400 | } |
kenjiArai | 0:5b88d5760320 | 401 | |
kenjiArai | 0:5b88d5760320 | 402 | dns_cache_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 403 | #endif |
kenjiArai | 0:5b88d5760320 | 404 | |
kenjiArai | 0:5b88d5760320 | 405 | return ret_val; |
kenjiArai | 0:5b88d5760320 | 406 | } |
kenjiArai | 0:5b88d5760320 | 407 | |
kenjiArai | 1:9db0e321a9f4 | 408 | static void nsapi_dns_cache_reset() |
kenjiArai | 1:9db0e321a9f4 | 409 | { |
kenjiArai | 1:9db0e321a9f4 | 410 | #if (MBED_CONF_NSAPI_DNS_CACHE_SIZE > 0) |
kenjiArai | 1:9db0e321a9f4 | 411 | dns_cache_mutex->lock(); |
kenjiArai | 1:9db0e321a9f4 | 412 | for (int i = 0; i < MBED_CONF_NSAPI_DNS_CACHE_SIZE; i++) { |
kenjiArai | 1:9db0e321a9f4 | 413 | if (dns_cache[i]) { |
kenjiArai | 1:9db0e321a9f4 | 414 | delete[] dns_cache[i]->host; |
kenjiArai | 1:9db0e321a9f4 | 415 | dns_cache[i]->host = NULL; |
kenjiArai | 1:9db0e321a9f4 | 416 | delete dns_cache[i]; |
kenjiArai | 1:9db0e321a9f4 | 417 | dns_cache[i] = NULL; |
kenjiArai | 1:9db0e321a9f4 | 418 | } |
kenjiArai | 1:9db0e321a9f4 | 419 | } |
kenjiArai | 1:9db0e321a9f4 | 420 | dns_cache_mutex->unlock(); |
kenjiArai | 1:9db0e321a9f4 | 421 | #endif |
kenjiArai | 1:9db0e321a9f4 | 422 | } |
kenjiArai | 1:9db0e321a9f4 | 423 | |
kenjiArai | 0:5b88d5760320 | 424 | static nsapi_error_t nsapi_dns_get_server_addr(NetworkStack *stack, uint8_t *index, uint8_t *total_attempts, uint8_t *send_success, SocketAddress *dns_addr, const char *interface_name) |
kenjiArai | 0:5b88d5760320 | 425 | { |
kenjiArai | 0:5b88d5760320 | 426 | bool dns_addr_set = false; |
kenjiArai | 0:5b88d5760320 | 427 | |
kenjiArai | 0:5b88d5760320 | 428 | if (*total_attempts == 0) { |
kenjiArai | 0:5b88d5760320 | 429 | return NSAPI_ERROR_NO_ADDRESS; |
kenjiArai | 0:5b88d5760320 | 430 | } |
kenjiArai | 0:5b88d5760320 | 431 | |
kenjiArai | 0:5b88d5760320 | 432 | if (*index >= DNS_SERVERS_SIZE + DNS_STACK_SERVERS_NUM) { |
kenjiArai | 0:5b88d5760320 | 433 | // If there are total attempts left and send to has been successful at least once on this round |
kenjiArai | 0:5b88d5760320 | 434 | if (*total_attempts && *send_success) { |
kenjiArai | 0:5b88d5760320 | 435 | *index = 0; |
kenjiArai | 0:5b88d5760320 | 436 | *send_success = 0; |
kenjiArai | 0:5b88d5760320 | 437 | } else { |
kenjiArai | 0:5b88d5760320 | 438 | return NSAPI_ERROR_NO_ADDRESS; |
kenjiArai | 0:5b88d5760320 | 439 | } |
kenjiArai | 0:5b88d5760320 | 440 | } |
kenjiArai | 0:5b88d5760320 | 441 | |
kenjiArai | 0:5b88d5760320 | 442 | if (*index < DNS_STACK_SERVERS_NUM) { |
kenjiArai | 0:5b88d5760320 | 443 | nsapi_error_t ret = stack->get_dns_server(*index, dns_addr, interface_name); |
kenjiArai | 0:5b88d5760320 | 444 | if (ret < 0) { |
kenjiArai | 0:5b88d5760320 | 445 | *index = DNS_STACK_SERVERS_NUM; |
kenjiArai | 0:5b88d5760320 | 446 | } else { |
kenjiArai | 0:5b88d5760320 | 447 | dns_addr_set = true; |
kenjiArai | 0:5b88d5760320 | 448 | } |
kenjiArai | 0:5b88d5760320 | 449 | } |
kenjiArai | 0:5b88d5760320 | 450 | |
kenjiArai | 0:5b88d5760320 | 451 | if (!dns_addr_set) { |
kenjiArai | 0:5b88d5760320 | 452 | dns_addr->set_addr(dns_servers[*index - DNS_STACK_SERVERS_NUM]); |
kenjiArai | 0:5b88d5760320 | 453 | } |
kenjiArai | 0:5b88d5760320 | 454 | |
kenjiArai | 0:5b88d5760320 | 455 | dns_addr->set_port(53); |
kenjiArai | 0:5b88d5760320 | 456 | |
kenjiArai | 0:5b88d5760320 | 457 | return NSAPI_ERROR_OK; |
kenjiArai | 0:5b88d5760320 | 458 | } |
kenjiArai | 0:5b88d5760320 | 459 | |
kenjiArai | 0:5b88d5760320 | 460 | // core query function |
kenjiArai | 0:5b88d5760320 | 461 | static nsapi_size_or_error_t nsapi_dns_query_multiple(NetworkStack *stack, const char *host, |
kenjiArai | 0:5b88d5760320 | 462 | nsapi_addr_t *addr, unsigned addr_count, const char *interface_name, nsapi_version_t version) |
kenjiArai | 0:5b88d5760320 | 463 | { |
kenjiArai | 0:5b88d5760320 | 464 | // check for valid host name |
kenjiArai | 0:5b88d5760320 | 465 | int host_len = host ? strlen(host) : 0; |
kenjiArai | 0:5b88d5760320 | 466 | if (host_len > DNS_HOST_NAME_MAX_LEN || host_len == 0) { |
kenjiArai | 0:5b88d5760320 | 467 | return NSAPI_ERROR_PARAMETER; |
kenjiArai | 0:5b88d5760320 | 468 | } |
kenjiArai | 0:5b88d5760320 | 469 | |
kenjiArai | 0:5b88d5760320 | 470 | // check cache |
kenjiArai | 0:5b88d5760320 | 471 | if (nsapi_dns_cache_find(host, version, addr) == NSAPI_ERROR_OK) { |
kenjiArai | 0:5b88d5760320 | 472 | return 1; |
kenjiArai | 0:5b88d5760320 | 473 | } |
kenjiArai | 0:5b88d5760320 | 474 | |
kenjiArai | 0:5b88d5760320 | 475 | // create a udp socket |
kenjiArai | 0:5b88d5760320 | 476 | UDPSocket socket; |
kenjiArai | 0:5b88d5760320 | 477 | int err = socket.open(stack); |
kenjiArai | 0:5b88d5760320 | 478 | if (err) { |
kenjiArai | 0:5b88d5760320 | 479 | return err; |
kenjiArai | 0:5b88d5760320 | 480 | } |
kenjiArai | 0:5b88d5760320 | 481 | |
kenjiArai | 0:5b88d5760320 | 482 | socket.set_timeout(MBED_CONF_NSAPI_DNS_RESPONSE_WAIT_TIME); |
kenjiArai | 0:5b88d5760320 | 483 | |
kenjiArai | 0:5b88d5760320 | 484 | if (interface_name != NULL) { |
kenjiArai | 0:5b88d5760320 | 485 | socket.setsockopt(NSAPI_SOCKET, NSAPI_BIND_TO_DEVICE, interface_name, NSAPI_INTERFACE_NAME_MAX_SIZE); |
kenjiArai | 0:5b88d5760320 | 486 | } |
kenjiArai | 0:5b88d5760320 | 487 | // create network packet |
kenjiArai | 0:5b88d5760320 | 488 | uint8_t *const packet = (uint8_t *)malloc(DNS_BUFFER_SIZE); |
kenjiArai | 0:5b88d5760320 | 489 | if (!packet) { |
kenjiArai | 0:5b88d5760320 | 490 | return NSAPI_ERROR_NO_MEMORY; |
kenjiArai | 0:5b88d5760320 | 491 | } |
kenjiArai | 0:5b88d5760320 | 492 | |
kenjiArai | 0:5b88d5760320 | 493 | nsapi_size_or_error_t result = NSAPI_ERROR_DNS_FAILURE; |
kenjiArai | 0:5b88d5760320 | 494 | |
kenjiArai | 0:5b88d5760320 | 495 | uint8_t retries = MBED_CONF_NSAPI_DNS_RETRIES; |
kenjiArai | 0:5b88d5760320 | 496 | uint8_t index = 0; |
kenjiArai | 0:5b88d5760320 | 497 | uint8_t total_attempts = MBED_CONF_NSAPI_DNS_TOTAL_ATTEMPTS; |
kenjiArai | 0:5b88d5760320 | 498 | uint8_t send_success = 0; |
kenjiArai | 0:5b88d5760320 | 499 | |
kenjiArai | 0:5b88d5760320 | 500 | // check against each dns server |
kenjiArai | 0:5b88d5760320 | 501 | while (true) { |
kenjiArai | 0:5b88d5760320 | 502 | SocketAddress dns_addr; |
kenjiArai | 0:5b88d5760320 | 503 | err = nsapi_dns_get_server_addr(stack, &index, &total_attempts, &send_success, &dns_addr, interface_name); |
kenjiArai | 0:5b88d5760320 | 504 | if (err != NSAPI_ERROR_OK) { |
kenjiArai | 0:5b88d5760320 | 505 | break; |
kenjiArai | 0:5b88d5760320 | 506 | } |
kenjiArai | 0:5b88d5760320 | 507 | |
kenjiArai | 1:9db0e321a9f4 | 508 | if (version != NSAPI_UNSPEC && (dns_addr.get_ip_version() != version)) { |
kenjiArai | 1:9db0e321a9f4 | 509 | retries = MBED_CONF_NSAPI_DNS_RETRIES; |
kenjiArai | 1:9db0e321a9f4 | 510 | index++; |
kenjiArai | 1:9db0e321a9f4 | 511 | continue; |
kenjiArai | 1:9db0e321a9f4 | 512 | } |
kenjiArai | 0:5b88d5760320 | 513 | // send the question |
kenjiArai | 1:9db0e321a9f4 | 514 | int len = dns_append_question(packet, 1, host, dns_addr.get_ip_version()); |
kenjiArai | 0:5b88d5760320 | 515 | |
kenjiArai | 0:5b88d5760320 | 516 | err = socket.sendto(dns_addr, packet, len); |
kenjiArai | 0:5b88d5760320 | 517 | // send may fail for various reasons, including wrong address type - move on |
kenjiArai | 0:5b88d5760320 | 518 | if (err < 0) { |
kenjiArai | 0:5b88d5760320 | 519 | // goes to next dns server |
kenjiArai | 0:5b88d5760320 | 520 | retries = MBED_CONF_NSAPI_DNS_RETRIES; |
kenjiArai | 0:5b88d5760320 | 521 | index++; |
kenjiArai | 0:5b88d5760320 | 522 | continue; |
kenjiArai | 0:5b88d5760320 | 523 | } |
kenjiArai | 0:5b88d5760320 | 524 | |
kenjiArai | 0:5b88d5760320 | 525 | send_success++; |
kenjiArai | 0:5b88d5760320 | 526 | |
kenjiArai | 0:5b88d5760320 | 527 | if (total_attempts) { |
kenjiArai | 0:5b88d5760320 | 528 | total_attempts--; |
kenjiArai | 0:5b88d5760320 | 529 | } |
kenjiArai | 0:5b88d5760320 | 530 | |
kenjiArai | 0:5b88d5760320 | 531 | // recv the response |
kenjiArai | 0:5b88d5760320 | 532 | err = socket.recvfrom(NULL, packet, DNS_BUFFER_SIZE); |
kenjiArai | 0:5b88d5760320 | 533 | if (err == NSAPI_ERROR_WOULD_BLOCK) { |
kenjiArai | 0:5b88d5760320 | 534 | if (retries) { |
kenjiArai | 0:5b88d5760320 | 535 | // retries |
kenjiArai | 0:5b88d5760320 | 536 | retries--; |
kenjiArai | 0:5b88d5760320 | 537 | } else { |
kenjiArai | 0:5b88d5760320 | 538 | // goes to next dns server |
kenjiArai | 0:5b88d5760320 | 539 | retries = MBED_CONF_NSAPI_DNS_RETRIES; |
kenjiArai | 0:5b88d5760320 | 540 | index++; |
kenjiArai | 0:5b88d5760320 | 541 | } |
kenjiArai | 0:5b88d5760320 | 542 | continue; |
kenjiArai | 0:5b88d5760320 | 543 | } else if (err < 0) { |
kenjiArai | 0:5b88d5760320 | 544 | result = err; |
kenjiArai | 0:5b88d5760320 | 545 | break; |
kenjiArai | 0:5b88d5760320 | 546 | } |
kenjiArai | 0:5b88d5760320 | 547 | |
kenjiArai | 0:5b88d5760320 | 548 | const uint8_t *response = packet; |
kenjiArai | 0:5b88d5760320 | 549 | uint32_t ttl; |
kenjiArai | 0:5b88d5760320 | 550 | int resp = dns_scan_response(response, 1, &ttl, addr, addr_count); |
kenjiArai | 0:5b88d5760320 | 551 | if (resp > 0) { |
kenjiArai | 0:5b88d5760320 | 552 | nsapi_dns_cache_add(host, addr, ttl); |
kenjiArai | 0:5b88d5760320 | 553 | result = resp; |
kenjiArai | 0:5b88d5760320 | 554 | } else if (resp < 0) { |
kenjiArai | 0:5b88d5760320 | 555 | continue; |
kenjiArai | 0:5b88d5760320 | 556 | } |
kenjiArai | 0:5b88d5760320 | 557 | |
kenjiArai | 0:5b88d5760320 | 558 | /* The DNS response is final, no need to check other servers */ |
kenjiArai | 0:5b88d5760320 | 559 | break; |
kenjiArai | 0:5b88d5760320 | 560 | } |
kenjiArai | 0:5b88d5760320 | 561 | |
kenjiArai | 0:5b88d5760320 | 562 | // clean up packet |
kenjiArai | 0:5b88d5760320 | 563 | free(packet); |
kenjiArai | 0:5b88d5760320 | 564 | |
kenjiArai | 0:5b88d5760320 | 565 | // clean up udp |
kenjiArai | 0:5b88d5760320 | 566 | err = socket.close(); |
kenjiArai | 0:5b88d5760320 | 567 | if (err) { |
kenjiArai | 0:5b88d5760320 | 568 | return err; |
kenjiArai | 0:5b88d5760320 | 569 | } |
kenjiArai | 0:5b88d5760320 | 570 | |
kenjiArai | 0:5b88d5760320 | 571 | // return result |
kenjiArai | 0:5b88d5760320 | 572 | return result; |
kenjiArai | 0:5b88d5760320 | 573 | } |
kenjiArai | 0:5b88d5760320 | 574 | |
kenjiArai | 0:5b88d5760320 | 575 | // convenience functions for other forms of queries |
kenjiArai | 0:5b88d5760320 | 576 | extern "C" nsapi_size_or_error_t nsapi_dns_query_multiple(nsapi_stack_t *stack, const char *host, |
kenjiArai | 0:5b88d5760320 | 577 | nsapi_addr_t *addr, nsapi_size_t addr_count, const char *interface_name, nsapi_version_t version) |
kenjiArai | 0:5b88d5760320 | 578 | { |
kenjiArai | 0:5b88d5760320 | 579 | NetworkStack *nstack = nsapi_create_stack(stack); |
kenjiArai | 0:5b88d5760320 | 580 | return nsapi_dns_query_multiple(nstack, host, addr, addr_count, interface_name, version); |
kenjiArai | 0:5b88d5760320 | 581 | } |
kenjiArai | 0:5b88d5760320 | 582 | |
kenjiArai | 0:5b88d5760320 | 583 | nsapi_size_or_error_t nsapi_dns_query_multiple(NetworkStack *stack, const char *host, |
kenjiArai | 0:5b88d5760320 | 584 | SocketAddress *addresses, nsapi_size_t addr_count, const char *interface_name, nsapi_version_t version) |
kenjiArai | 0:5b88d5760320 | 585 | { |
kenjiArai | 0:5b88d5760320 | 586 | nsapi_addr_t *addrs = new (std::nothrow) nsapi_addr_t[addr_count]; |
kenjiArai | 0:5b88d5760320 | 587 | nsapi_size_or_error_t result = nsapi_dns_query_multiple(stack, host, addrs, addr_count, interface_name, version); |
kenjiArai | 0:5b88d5760320 | 588 | |
kenjiArai | 0:5b88d5760320 | 589 | if (result > 0) { |
kenjiArai | 0:5b88d5760320 | 590 | for (int i = 0; i < result; i++) { |
kenjiArai | 0:5b88d5760320 | 591 | addresses[i].set_addr(addrs[i]); |
kenjiArai | 0:5b88d5760320 | 592 | } |
kenjiArai | 0:5b88d5760320 | 593 | } |
kenjiArai | 0:5b88d5760320 | 594 | |
kenjiArai | 0:5b88d5760320 | 595 | delete[] addrs; |
kenjiArai | 0:5b88d5760320 | 596 | return result; |
kenjiArai | 0:5b88d5760320 | 597 | } |
kenjiArai | 0:5b88d5760320 | 598 | |
kenjiArai | 0:5b88d5760320 | 599 | extern "C" nsapi_error_t nsapi_dns_query(nsapi_stack_t *stack, const char *host, |
kenjiArai | 0:5b88d5760320 | 600 | nsapi_addr_t *addr, nsapi_version_t version) |
kenjiArai | 0:5b88d5760320 | 601 | { |
kenjiArai | 0:5b88d5760320 | 602 | NetworkStack *nstack = nsapi_create_stack(stack); |
kenjiArai | 0:5b88d5760320 | 603 | nsapi_size_or_error_t result = nsapi_dns_query_multiple(nstack, host, addr, 1, NULL, version); |
kenjiArai | 0:5b88d5760320 | 604 | return (nsapi_error_t)((result > 0) ? 0 : result); |
kenjiArai | 0:5b88d5760320 | 605 | } |
kenjiArai | 0:5b88d5760320 | 606 | |
kenjiArai | 0:5b88d5760320 | 607 | nsapi_error_t nsapi_dns_query(NetworkStack *stack, const char *host, |
kenjiArai | 0:5b88d5760320 | 608 | SocketAddress *address, nsapi_version_t version) |
kenjiArai | 0:5b88d5760320 | 609 | { |
kenjiArai | 0:5b88d5760320 | 610 | nsapi_addr_t addr; |
kenjiArai | 0:5b88d5760320 | 611 | nsapi_size_or_error_t result = nsapi_dns_query_multiple(stack, host, &addr, 1, NULL, version); |
kenjiArai | 0:5b88d5760320 | 612 | address->set_addr(addr); |
kenjiArai | 0:5b88d5760320 | 613 | return (nsapi_error_t)((result > 0) ? 0 : result); |
kenjiArai | 0:5b88d5760320 | 614 | } |
kenjiArai | 0:5b88d5760320 | 615 | |
kenjiArai | 0:5b88d5760320 | 616 | nsapi_error_t nsapi_dns_query(NetworkStack *stack, const char *host, |
kenjiArai | 0:5b88d5760320 | 617 | SocketAddress *address, const char *interface_name, nsapi_version_t version) |
kenjiArai | 0:5b88d5760320 | 618 | { |
kenjiArai | 0:5b88d5760320 | 619 | nsapi_addr_t addr; |
kenjiArai | 0:5b88d5760320 | 620 | nsapi_size_or_error_t result = nsapi_dns_query_multiple(stack, host, &addr, 1, interface_name, version); |
kenjiArai | 0:5b88d5760320 | 621 | address->set_addr(addr); |
kenjiArai | 0:5b88d5760320 | 622 | return (nsapi_error_t)((result > 0) ? 0 : result); |
kenjiArai | 0:5b88d5760320 | 623 | } |
kenjiArai | 0:5b88d5760320 | 624 | |
kenjiArai | 0:5b88d5760320 | 625 | nsapi_value_or_error_t nsapi_dns_query_async(NetworkStack *stack, const char *host, |
kenjiArai | 0:5b88d5760320 | 626 | NetworkStack::hostbyname_cb_t callback, call_in_callback_cb_t call_in_cb, |
kenjiArai | 0:5b88d5760320 | 627 | nsapi_version_t version) |
kenjiArai | 0:5b88d5760320 | 628 | { |
kenjiArai | 0:5b88d5760320 | 629 | return nsapi_dns_query_multiple_async(stack, host, callback, 0, call_in_cb, NULL, version); |
kenjiArai | 0:5b88d5760320 | 630 | } |
kenjiArai | 0:5b88d5760320 | 631 | |
kenjiArai | 0:5b88d5760320 | 632 | nsapi_value_or_error_t nsapi_dns_query_async(NetworkStack *stack, const char *host, |
kenjiArai | 0:5b88d5760320 | 633 | NetworkStack::hostbyname_cb_t callback, call_in_callback_cb_t call_in_cb, |
kenjiArai | 0:5b88d5760320 | 634 | const char *interface_name, nsapi_version_t version) |
kenjiArai | 0:5b88d5760320 | 635 | { |
kenjiArai | 0:5b88d5760320 | 636 | return nsapi_dns_query_multiple_async(stack, host, callback, 0, call_in_cb, interface_name, version); |
kenjiArai | 0:5b88d5760320 | 637 | } |
kenjiArai | 0:5b88d5760320 | 638 | |
kenjiArai | 0:5b88d5760320 | 639 | void nsapi_dns_call_in_set(call_in_callback_cb_t callback) |
kenjiArai | 0:5b88d5760320 | 640 | { |
kenjiArai | 0:5b88d5760320 | 641 | *dns_call_in.get() = callback; |
kenjiArai | 0:5b88d5760320 | 642 | } |
kenjiArai | 0:5b88d5760320 | 643 | |
kenjiArai | 1:9db0e321a9f4 | 644 | void nsapi_dns_reset() |
kenjiArai | 1:9db0e321a9f4 | 645 | { |
kenjiArai | 1:9db0e321a9f4 | 646 | nsapi_dns_cache_reset(); |
kenjiArai | 1:9db0e321a9f4 | 647 | dns_message_id = 1; |
kenjiArai | 1:9db0e321a9f4 | 648 | dns_unique_id = 1; |
kenjiArai | 1:9db0e321a9f4 | 649 | } |
kenjiArai | 1:9db0e321a9f4 | 650 | |
kenjiArai | 0:5b88d5760320 | 651 | nsapi_error_t nsapi_dns_call_in(call_in_callback_cb_t cb, int delay, mbed::Callback<void()> func) |
kenjiArai | 0:5b88d5760320 | 652 | { |
kenjiArai | 0:5b88d5760320 | 653 | if (*dns_call_in.get()) { |
kenjiArai | 0:5b88d5760320 | 654 | dns_call_in->call(delay, func); |
kenjiArai | 0:5b88d5760320 | 655 | } else { |
kenjiArai | 0:5b88d5760320 | 656 | return cb(delay, func); |
kenjiArai | 0:5b88d5760320 | 657 | } |
kenjiArai | 0:5b88d5760320 | 658 | return NSAPI_ERROR_OK; |
kenjiArai | 0:5b88d5760320 | 659 | } |
kenjiArai | 0:5b88d5760320 | 660 | |
kenjiArai | 0:5b88d5760320 | 661 | nsapi_value_or_error_t nsapi_dns_query_multiple_async(NetworkStack *stack, const char *host, |
kenjiArai | 0:5b88d5760320 | 662 | NetworkStack::hostbyname_cb_t callback, nsapi_size_t addr_count, |
kenjiArai | 0:5b88d5760320 | 663 | call_in_callback_cb_t call_in_cb, const char *interface_name, nsapi_version_t version) |
kenjiArai | 0:5b88d5760320 | 664 | { |
kenjiArai | 0:5b88d5760320 | 665 | dns_mutex->lock(); |
kenjiArai | 0:5b88d5760320 | 666 | |
kenjiArai | 0:5b88d5760320 | 667 | if (!stack) { |
kenjiArai | 0:5b88d5760320 | 668 | return NSAPI_ERROR_PARAMETER; |
kenjiArai | 0:5b88d5760320 | 669 | } |
kenjiArai | 0:5b88d5760320 | 670 | |
kenjiArai | 0:5b88d5760320 | 671 | // check for valid host name |
kenjiArai | 0:5b88d5760320 | 672 | int host_len = host ? strlen(host) : 0; |
kenjiArai | 0:5b88d5760320 | 673 | if (host_len > DNS_HOST_NAME_MAX_LEN || host_len == 0) { |
kenjiArai | 0:5b88d5760320 | 674 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 675 | return NSAPI_ERROR_PARAMETER; |
kenjiArai | 0:5b88d5760320 | 676 | } |
kenjiArai | 0:5b88d5760320 | 677 | |
kenjiArai | 0:5b88d5760320 | 678 | nsapi_addr address; |
kenjiArai | 0:5b88d5760320 | 679 | if (nsapi_dns_cache_find(host, version, &address) == NSAPI_ERROR_OK) { |
kenjiArai | 0:5b88d5760320 | 680 | SocketAddress addr(address); |
kenjiArai | 0:5b88d5760320 | 681 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 682 | callback(NSAPI_ERROR_OK, &addr); |
kenjiArai | 0:5b88d5760320 | 683 | return NSAPI_ERROR_OK; |
kenjiArai | 0:5b88d5760320 | 684 | } |
kenjiArai | 0:5b88d5760320 | 685 | |
kenjiArai | 0:5b88d5760320 | 686 | int index = -1; |
kenjiArai | 0:5b88d5760320 | 687 | |
kenjiArai | 0:5b88d5760320 | 688 | for (int i = 0; i < DNS_QUERY_QUEUE_SIZE; i++) { |
kenjiArai | 0:5b88d5760320 | 689 | if (!dns_query_queue[i]) { |
kenjiArai | 0:5b88d5760320 | 690 | index = i; |
kenjiArai | 0:5b88d5760320 | 691 | break; |
kenjiArai | 0:5b88d5760320 | 692 | } |
kenjiArai | 0:5b88d5760320 | 693 | } |
kenjiArai | 0:5b88d5760320 | 694 | |
kenjiArai | 0:5b88d5760320 | 695 | if (index < 0) { |
kenjiArai | 0:5b88d5760320 | 696 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 697 | return NSAPI_ERROR_NO_MEMORY; |
kenjiArai | 0:5b88d5760320 | 698 | } |
kenjiArai | 0:5b88d5760320 | 699 | |
kenjiArai | 0:5b88d5760320 | 700 | DNS_QUERY *query = new (std::nothrow) DNS_QUERY; |
kenjiArai | 0:5b88d5760320 | 701 | |
kenjiArai | 0:5b88d5760320 | 702 | if (!query) { |
kenjiArai | 0:5b88d5760320 | 703 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 704 | return NSAPI_ERROR_NO_MEMORY; |
kenjiArai | 0:5b88d5760320 | 705 | } |
kenjiArai | 0:5b88d5760320 | 706 | |
kenjiArai | 0:5b88d5760320 | 707 | query->host = new (std::nothrow) char[host_len + 1]; |
kenjiArai | 0:5b88d5760320 | 708 | if (!query->host) { |
kenjiArai | 0:5b88d5760320 | 709 | delete query; |
kenjiArai | 0:5b88d5760320 | 710 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 711 | return NSAPI_ERROR_NO_MEMORY; |
kenjiArai | 0:5b88d5760320 | 712 | } |
kenjiArai | 0:5b88d5760320 | 713 | strcpy(query->host, host); |
kenjiArai | 0:5b88d5760320 | 714 | query->status = NSAPI_ERROR_TIMEOUT; |
kenjiArai | 0:5b88d5760320 | 715 | query->callback = callback; |
kenjiArai | 0:5b88d5760320 | 716 | query->call_in_cb = call_in_cb; |
kenjiArai | 0:5b88d5760320 | 717 | query->stack = stack; |
kenjiArai | 0:5b88d5760320 | 718 | query->addr_count = addr_count; |
kenjiArai | 0:5b88d5760320 | 719 | query->version = version; |
kenjiArai | 0:5b88d5760320 | 720 | query->socket = NULL; |
kenjiArai | 0:5b88d5760320 | 721 | query->socket_cb_data = NULL; |
kenjiArai | 0:5b88d5760320 | 722 | query->addrs = NULL; |
kenjiArai | 0:5b88d5760320 | 723 | query->dns_server = 0; |
kenjiArai | 0:5b88d5760320 | 724 | query->retries = MBED_CONF_NSAPI_DNS_RETRIES + 1; |
kenjiArai | 0:5b88d5760320 | 725 | query->total_attempts = MBED_CONF_NSAPI_DNS_TOTAL_ATTEMPTS; |
kenjiArai | 0:5b88d5760320 | 726 | query->send_success = 0; |
kenjiArai | 0:5b88d5760320 | 727 | query->dns_message_id = 0; |
kenjiArai | 0:5b88d5760320 | 728 | query->socket_timeout = 0; |
kenjiArai | 0:5b88d5760320 | 729 | query->total_timeout = MBED_CONF_NSAPI_DNS_TOTAL_ATTEMPTS * MBED_CONF_NSAPI_DNS_RESPONSE_WAIT_TIME + 500; |
kenjiArai | 0:5b88d5760320 | 730 | query->count = 0; |
kenjiArai | 0:5b88d5760320 | 731 | query->state = DNS_CREATED; |
kenjiArai | 0:5b88d5760320 | 732 | query->interface_name = interface_name; |
kenjiArai | 0:5b88d5760320 | 733 | query->unique_id = dns_unique_id++; |
kenjiArai | 0:5b88d5760320 | 734 | if (query->unique_id > 0x7FFF) { |
kenjiArai | 0:5b88d5760320 | 735 | query->unique_id = 1; |
kenjiArai | 0:5b88d5760320 | 736 | } |
kenjiArai | 0:5b88d5760320 | 737 | |
kenjiArai | 0:5b88d5760320 | 738 | int ongoing_queries = 0; |
kenjiArai | 0:5b88d5760320 | 739 | |
kenjiArai | 0:5b88d5760320 | 740 | for (int i = 0; i < DNS_QUERY_QUEUE_SIZE; i++) { |
kenjiArai | 0:5b88d5760320 | 741 | if (dns_query_queue[i]) { |
kenjiArai | 0:5b88d5760320 | 742 | if (!query->socket && dns_query_queue[i]->socket && dns_query_queue[i]->stack == query->stack) { |
kenjiArai | 0:5b88d5760320 | 743 | query->socket = dns_query_queue[i]->socket; |
kenjiArai | 0:5b88d5760320 | 744 | query->socket_cb_data = dns_query_queue[i]->socket_cb_data; |
kenjiArai | 0:5b88d5760320 | 745 | } |
kenjiArai | 0:5b88d5760320 | 746 | ongoing_queries++; |
kenjiArai | 0:5b88d5760320 | 747 | } |
kenjiArai | 0:5b88d5760320 | 748 | } |
kenjiArai | 0:5b88d5760320 | 749 | |
kenjiArai | 0:5b88d5760320 | 750 | dns_query_queue[index] = query; |
kenjiArai | 0:5b88d5760320 | 751 | |
kenjiArai | 0:5b88d5760320 | 752 | // Add some overhead based on number of ongoing queries |
kenjiArai | 0:5b88d5760320 | 753 | query->total_timeout += ongoing_queries * 500; |
kenjiArai | 0:5b88d5760320 | 754 | |
kenjiArai | 0:5b88d5760320 | 755 | if (!dns_timer_running) { |
kenjiArai | 0:5b88d5760320 | 756 | if (nsapi_dns_call_in(query->call_in_cb, DNS_TIMER_TIMEOUT, mbed::callback(nsapi_dns_query_async_timeout)) != NSAPI_ERROR_OK) { |
kenjiArai | 1:9db0e321a9f4 | 757 | delete[] query->host; |
kenjiArai | 0:5b88d5760320 | 758 | delete query; |
kenjiArai | 1:9db0e321a9f4 | 759 | dns_query_queue[index] = NULL; |
kenjiArai | 0:5b88d5760320 | 760 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 761 | return NSAPI_ERROR_NO_MEMORY; |
kenjiArai | 0:5b88d5760320 | 762 | } |
kenjiArai | 0:5b88d5760320 | 763 | dns_timer_running = true; |
kenjiArai | 0:5b88d5760320 | 764 | } |
kenjiArai | 0:5b88d5760320 | 765 | |
kenjiArai | 0:5b88d5760320 | 766 | // Initiates query |
kenjiArai | 0:5b88d5760320 | 767 | nsapi_dns_query_async_initiate_next(); |
kenjiArai | 0:5b88d5760320 | 768 | |
kenjiArai | 0:5b88d5760320 | 769 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 770 | |
kenjiArai | 0:5b88d5760320 | 771 | return query->unique_id; |
kenjiArai | 0:5b88d5760320 | 772 | } |
kenjiArai | 0:5b88d5760320 | 773 | |
kenjiArai | 0:5b88d5760320 | 774 | static void nsapi_dns_query_async_initiate_next(void) |
kenjiArai | 0:5b88d5760320 | 775 | { |
kenjiArai | 1:9db0e321a9f4 | 776 | intptr_t id = INTPTR_MAX; |
kenjiArai | 0:5b88d5760320 | 777 | DNS_QUERY *query = NULL; |
kenjiArai | 0:5b88d5760320 | 778 | |
kenjiArai | 0:5b88d5760320 | 779 | // Trigger next query to start, find one that has been on queue longest |
kenjiArai | 0:5b88d5760320 | 780 | for (int i = 0; i < DNS_QUERY_QUEUE_SIZE; i++) { |
kenjiArai | 0:5b88d5760320 | 781 | if (dns_query_queue[i]) { |
kenjiArai | 0:5b88d5760320 | 782 | if (dns_query_queue[i]->state == DNS_CREATED) { |
kenjiArai | 0:5b88d5760320 | 783 | if (dns_query_queue[i]->unique_id <= id) { |
kenjiArai | 0:5b88d5760320 | 784 | query = dns_query_queue[i]; |
kenjiArai | 0:5b88d5760320 | 785 | id = dns_query_queue[i]->unique_id; |
kenjiArai | 0:5b88d5760320 | 786 | } |
kenjiArai | 0:5b88d5760320 | 787 | // If some query is already ongoing do not trigger |
kenjiArai | 0:5b88d5760320 | 788 | } else if (dns_query_queue[i]->state == DNS_INITIATED) { |
kenjiArai | 0:5b88d5760320 | 789 | query = NULL; |
kenjiArai | 0:5b88d5760320 | 790 | break; |
kenjiArai | 0:5b88d5760320 | 791 | } |
kenjiArai | 0:5b88d5760320 | 792 | } |
kenjiArai | 0:5b88d5760320 | 793 | } |
kenjiArai | 0:5b88d5760320 | 794 | |
kenjiArai | 0:5b88d5760320 | 795 | if (query) { |
kenjiArai | 0:5b88d5760320 | 796 | query->state = DNS_INITIATED; |
kenjiArai | 0:5b88d5760320 | 797 | nsapi_dns_call_in(query->call_in_cb, 0, mbed::callback(nsapi_dns_query_async_create, reinterpret_cast<void *>(query->unique_id))); |
kenjiArai | 0:5b88d5760320 | 798 | } |
kenjiArai | 0:5b88d5760320 | 799 | } |
kenjiArai | 0:5b88d5760320 | 800 | |
kenjiArai | 0:5b88d5760320 | 801 | static void nsapi_dns_query_async_timeout(void) |
kenjiArai | 0:5b88d5760320 | 802 | { |
kenjiArai | 0:5b88d5760320 | 803 | dns_mutex->lock(); |
kenjiArai | 0:5b88d5760320 | 804 | |
kenjiArai | 0:5b88d5760320 | 805 | DNS_QUERY *query = NULL; |
kenjiArai | 0:5b88d5760320 | 806 | |
kenjiArai | 0:5b88d5760320 | 807 | for (int i = 0; i < DNS_QUERY_QUEUE_SIZE; i++) { |
kenjiArai | 0:5b88d5760320 | 808 | if (dns_query_queue[i]) { |
kenjiArai | 0:5b88d5760320 | 809 | if (dns_query_queue[i]->state == DNS_CANCELLED) { |
kenjiArai | 0:5b88d5760320 | 810 | // Delete cancelled |
kenjiArai | 0:5b88d5760320 | 811 | nsapi_dns_query_async_delete(dns_query_queue[i]->unique_id); |
kenjiArai | 0:5b88d5760320 | 812 | nsapi_dns_query_async_initiate_next(); |
kenjiArai | 0:5b88d5760320 | 813 | continue; |
kenjiArai | 0:5b88d5760320 | 814 | } |
kenjiArai | 0:5b88d5760320 | 815 | |
kenjiArai | 0:5b88d5760320 | 816 | if (dns_query_queue[i]->total_timeout > DNS_TIMER_TIMEOUT) { |
kenjiArai | 0:5b88d5760320 | 817 | dns_query_queue[i]->total_timeout -= DNS_TIMER_TIMEOUT; |
kenjiArai | 0:5b88d5760320 | 818 | } else { |
kenjiArai | 0:5b88d5760320 | 819 | // If does not already have response, fails |
kenjiArai | 0:5b88d5760320 | 820 | if (dns_query_queue[i]->status == NSAPI_ERROR_TIMEOUT) { |
kenjiArai | 0:5b88d5760320 | 821 | dns_query_queue[i]->socket_timeout = 0; |
kenjiArai | 0:5b88d5760320 | 822 | nsapi_dns_call_in(dns_query_queue[i]->call_in_cb, 0, mbed::callback(nsapi_dns_query_async_response, reinterpret_cast<void *>(dns_query_queue[i]->unique_id))); |
kenjiArai | 0:5b88d5760320 | 823 | } |
kenjiArai | 0:5b88d5760320 | 824 | } |
kenjiArai | 0:5b88d5760320 | 825 | |
kenjiArai | 0:5b88d5760320 | 826 | if (dns_query_queue[i]->socket_timeout > 0) { |
kenjiArai | 0:5b88d5760320 | 827 | if (dns_query_queue[i]->socket_timeout > DNS_TIMER_TIMEOUT) { |
kenjiArai | 0:5b88d5760320 | 828 | dns_query_queue[i]->socket_timeout -= DNS_TIMER_TIMEOUT; |
kenjiArai | 0:5b88d5760320 | 829 | } else { |
kenjiArai | 0:5b88d5760320 | 830 | // Retries |
kenjiArai | 0:5b88d5760320 | 831 | dns_query_queue[i]->socket_timeout = 0; |
kenjiArai | 0:5b88d5760320 | 832 | nsapi_dns_call_in(dns_query_queue[i]->call_in_cb, 0, |
kenjiArai | 0:5b88d5760320 | 833 | mbed::callback(nsapi_dns_query_async_send, reinterpret_cast<void *>(dns_query_queue[i]->unique_id))); |
kenjiArai | 0:5b88d5760320 | 834 | } |
kenjiArai | 0:5b88d5760320 | 835 | } |
kenjiArai | 0:5b88d5760320 | 836 | |
kenjiArai | 0:5b88d5760320 | 837 | if (!query) { |
kenjiArai | 0:5b88d5760320 | 838 | query = dns_query_queue[i]; |
kenjiArai | 0:5b88d5760320 | 839 | } |
kenjiArai | 0:5b88d5760320 | 840 | } |
kenjiArai | 0:5b88d5760320 | 841 | } |
kenjiArai | 0:5b88d5760320 | 842 | |
kenjiArai | 0:5b88d5760320 | 843 | // Starts timer again |
kenjiArai | 0:5b88d5760320 | 844 | if (query) { |
kenjiArai | 0:5b88d5760320 | 845 | nsapi_dns_call_in(query->call_in_cb, DNS_TIMER_TIMEOUT, mbed::callback(nsapi_dns_query_async_timeout)); |
kenjiArai | 0:5b88d5760320 | 846 | } else { |
kenjiArai | 0:5b88d5760320 | 847 | dns_timer_running = false; |
kenjiArai | 0:5b88d5760320 | 848 | } |
kenjiArai | 0:5b88d5760320 | 849 | |
kenjiArai | 0:5b88d5760320 | 850 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 851 | } |
kenjiArai | 0:5b88d5760320 | 852 | |
kenjiArai | 1:9db0e321a9f4 | 853 | nsapi_error_t nsapi_dns_query_async_cancel(nsapi_size_or_error_t id) |
kenjiArai | 0:5b88d5760320 | 854 | { |
kenjiArai | 0:5b88d5760320 | 855 | dns_mutex->lock(); |
kenjiArai | 0:5b88d5760320 | 856 | |
kenjiArai | 0:5b88d5760320 | 857 | DNS_QUERY *query = NULL; |
kenjiArai | 0:5b88d5760320 | 858 | |
kenjiArai | 0:5b88d5760320 | 859 | for (int i = 0; i < DNS_QUERY_QUEUE_SIZE; i++) { |
kenjiArai | 0:5b88d5760320 | 860 | if (dns_query_queue[i] && dns_query_queue[i]->unique_id == id) { |
kenjiArai | 0:5b88d5760320 | 861 | query = dns_query_queue[i]; |
kenjiArai | 0:5b88d5760320 | 862 | break; |
kenjiArai | 0:5b88d5760320 | 863 | } |
kenjiArai | 0:5b88d5760320 | 864 | } |
kenjiArai | 0:5b88d5760320 | 865 | |
kenjiArai | 0:5b88d5760320 | 866 | if (!query || query->state == DNS_CANCELLED) { |
kenjiArai | 0:5b88d5760320 | 867 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 868 | return NSAPI_ERROR_PARAMETER; |
kenjiArai | 0:5b88d5760320 | 869 | } |
kenjiArai | 0:5b88d5760320 | 870 | |
kenjiArai | 0:5b88d5760320 | 871 | // Mark the query as cancelled, deleted by timer handler |
kenjiArai | 0:5b88d5760320 | 872 | query->state = DNS_CANCELLED; |
kenjiArai | 0:5b88d5760320 | 873 | // Do not call callback |
kenjiArai | 0:5b88d5760320 | 874 | query->callback = 0; |
kenjiArai | 0:5b88d5760320 | 875 | |
kenjiArai | 0:5b88d5760320 | 876 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 877 | |
kenjiArai | 0:5b88d5760320 | 878 | return NSAPI_ERROR_OK; |
kenjiArai | 0:5b88d5760320 | 879 | } |
kenjiArai | 0:5b88d5760320 | 880 | |
kenjiArai | 0:5b88d5760320 | 881 | static void nsapi_dns_query_async_create(void *ptr) |
kenjiArai | 0:5b88d5760320 | 882 | { |
kenjiArai | 0:5b88d5760320 | 883 | dns_mutex->lock(); |
kenjiArai | 0:5b88d5760320 | 884 | |
kenjiArai | 1:9db0e321a9f4 | 885 | intptr_t unique_id = reinterpret_cast<intptr_t>(ptr); |
kenjiArai | 0:5b88d5760320 | 886 | |
kenjiArai | 0:5b88d5760320 | 887 | DNS_QUERY *query = NULL; |
kenjiArai | 0:5b88d5760320 | 888 | |
kenjiArai | 0:5b88d5760320 | 889 | for (int i = 0; i < DNS_QUERY_QUEUE_SIZE; i++) { |
kenjiArai | 0:5b88d5760320 | 890 | if (dns_query_queue[i] && dns_query_queue[i]->unique_id == unique_id) { |
kenjiArai | 0:5b88d5760320 | 891 | query = dns_query_queue[i]; |
kenjiArai | 0:5b88d5760320 | 892 | break; |
kenjiArai | 0:5b88d5760320 | 893 | } |
kenjiArai | 0:5b88d5760320 | 894 | } |
kenjiArai | 0:5b88d5760320 | 895 | |
kenjiArai | 0:5b88d5760320 | 896 | if (!query || query->state == DNS_CANCELLED) { |
kenjiArai | 0:5b88d5760320 | 897 | // Cancel has been called |
kenjiArai | 0:5b88d5760320 | 898 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 899 | return; |
kenjiArai | 0:5b88d5760320 | 900 | } |
kenjiArai | 0:5b88d5760320 | 901 | |
kenjiArai | 0:5b88d5760320 | 902 | for (int i = 0; i < DNS_QUERY_QUEUE_SIZE; i++) { |
kenjiArai | 0:5b88d5760320 | 903 | if (dns_query_queue[i] && dns_query_queue[i] != query) { |
kenjiArai | 0:5b88d5760320 | 904 | if (!query->socket && dns_query_queue[i]->socket && dns_query_queue[i]->stack == query->stack) { |
kenjiArai | 0:5b88d5760320 | 905 | query->socket = dns_query_queue[i]->socket; |
kenjiArai | 0:5b88d5760320 | 906 | query->socket_cb_data = dns_query_queue[i]->socket_cb_data; |
kenjiArai | 0:5b88d5760320 | 907 | } |
kenjiArai | 0:5b88d5760320 | 908 | } |
kenjiArai | 0:5b88d5760320 | 909 | } |
kenjiArai | 0:5b88d5760320 | 910 | |
kenjiArai | 0:5b88d5760320 | 911 | UDPSocket *socket; |
kenjiArai | 0:5b88d5760320 | 912 | |
kenjiArai | 0:5b88d5760320 | 913 | if (query->socket) { |
kenjiArai | 0:5b88d5760320 | 914 | socket = query->socket; |
kenjiArai | 0:5b88d5760320 | 915 | } else { |
kenjiArai | 0:5b88d5760320 | 916 | socket = new (std::nothrow) UDPSocket; |
kenjiArai | 0:5b88d5760320 | 917 | if (!socket) { |
kenjiArai | 0:5b88d5760320 | 918 | nsapi_dns_query_async_resp(query, NSAPI_ERROR_NO_MEMORY, NULL); |
kenjiArai | 0:5b88d5760320 | 919 | return; |
kenjiArai | 0:5b88d5760320 | 920 | } |
kenjiArai | 0:5b88d5760320 | 921 | |
kenjiArai | 0:5b88d5760320 | 922 | int err = socket->open(query->stack); |
kenjiArai | 0:5b88d5760320 | 923 | |
kenjiArai | 0:5b88d5760320 | 924 | if (err) { |
kenjiArai | 0:5b88d5760320 | 925 | delete socket; |
kenjiArai | 0:5b88d5760320 | 926 | nsapi_dns_query_async_resp(query, err, NULL); |
kenjiArai | 0:5b88d5760320 | 927 | return; |
kenjiArai | 0:5b88d5760320 | 928 | } |
kenjiArai | 0:5b88d5760320 | 929 | |
kenjiArai | 0:5b88d5760320 | 930 | socket->set_timeout(0); |
kenjiArai | 0:5b88d5760320 | 931 | if (query->interface_name != NULL) { |
kenjiArai | 0:5b88d5760320 | 932 | socket->setsockopt(NSAPI_SOCKET, NSAPI_BIND_TO_DEVICE, query->interface_name, NSAPI_INTERFACE_NAME_MAX_SIZE); |
kenjiArai | 0:5b88d5760320 | 933 | } |
kenjiArai | 0:5b88d5760320 | 934 | |
kenjiArai | 0:5b88d5760320 | 935 | if (!query->socket_cb_data) { |
kenjiArai | 0:5b88d5760320 | 936 | query->socket_cb_data = new SOCKET_CB_DATA; |
kenjiArai | 0:5b88d5760320 | 937 | } |
kenjiArai | 0:5b88d5760320 | 938 | query->socket_cb_data->call_in_cb = query->call_in_cb; |
kenjiArai | 0:5b88d5760320 | 939 | query->socket_cb_data->stack = query->stack; |
kenjiArai | 0:5b88d5760320 | 940 | socket->sigio(mbed::callback(nsapi_dns_query_async_socket_callback, query->socket_cb_data)); |
kenjiArai | 0:5b88d5760320 | 941 | |
kenjiArai | 0:5b88d5760320 | 942 | query->socket = socket; |
kenjiArai | 0:5b88d5760320 | 943 | } |
kenjiArai | 0:5b88d5760320 | 944 | |
kenjiArai | 0:5b88d5760320 | 945 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 946 | |
kenjiArai | 0:5b88d5760320 | 947 | nsapi_dns_query_async_send(reinterpret_cast<void *>(query->unique_id)); |
kenjiArai | 0:5b88d5760320 | 948 | |
kenjiArai | 0:5b88d5760320 | 949 | } |
kenjiArai | 0:5b88d5760320 | 950 | |
kenjiArai | 1:9db0e321a9f4 | 951 | static nsapi_error_t nsapi_dns_query_async_delete(intptr_t unique_id) |
kenjiArai | 0:5b88d5760320 | 952 | { |
kenjiArai | 0:5b88d5760320 | 953 | int index = -1; |
kenjiArai | 0:5b88d5760320 | 954 | DNS_QUERY *query = NULL; |
kenjiArai | 0:5b88d5760320 | 955 | |
kenjiArai | 0:5b88d5760320 | 956 | for (int i = 0; i < DNS_QUERY_QUEUE_SIZE; i++) { |
kenjiArai | 0:5b88d5760320 | 957 | if (dns_query_queue[i] && dns_query_queue[i]->unique_id == unique_id) { |
kenjiArai | 0:5b88d5760320 | 958 | query = dns_query_queue[i]; |
kenjiArai | 0:5b88d5760320 | 959 | index = i; |
kenjiArai | 0:5b88d5760320 | 960 | break; |
kenjiArai | 0:5b88d5760320 | 961 | } |
kenjiArai | 0:5b88d5760320 | 962 | } |
kenjiArai | 0:5b88d5760320 | 963 | |
kenjiArai | 0:5b88d5760320 | 964 | if (!query) { |
kenjiArai | 0:5b88d5760320 | 965 | return NSAPI_ERROR_PARAMETER; |
kenjiArai | 0:5b88d5760320 | 966 | } |
kenjiArai | 0:5b88d5760320 | 967 | |
kenjiArai | 0:5b88d5760320 | 968 | bool close_socket = true; |
kenjiArai | 0:5b88d5760320 | 969 | |
kenjiArai | 0:5b88d5760320 | 970 | for (int i = 0; i < DNS_QUERY_QUEUE_SIZE; i++) { |
kenjiArai | 0:5b88d5760320 | 971 | if (dns_query_queue[i] && dns_query_queue[i] != query && dns_query_queue[i]->socket && |
kenjiArai | 0:5b88d5760320 | 972 | dns_query_queue[i]->stack == query->stack) { |
kenjiArai | 0:5b88d5760320 | 973 | close_socket = false; |
kenjiArai | 0:5b88d5760320 | 974 | } |
kenjiArai | 0:5b88d5760320 | 975 | } |
kenjiArai | 0:5b88d5760320 | 976 | |
kenjiArai | 0:5b88d5760320 | 977 | if (close_socket && query->socket) { |
kenjiArai | 0:5b88d5760320 | 978 | query->socket->close(); |
kenjiArai | 0:5b88d5760320 | 979 | delete query->socket; |
kenjiArai | 0:5b88d5760320 | 980 | delete query->socket_cb_data; |
kenjiArai | 0:5b88d5760320 | 981 | } |
kenjiArai | 0:5b88d5760320 | 982 | |
kenjiArai | 0:5b88d5760320 | 983 | if (query->addrs) { |
kenjiArai | 0:5b88d5760320 | 984 | delete[] query->addrs; |
kenjiArai | 0:5b88d5760320 | 985 | } |
kenjiArai | 0:5b88d5760320 | 986 | |
kenjiArai | 1:9db0e321a9f4 | 987 | delete[] query->host; |
kenjiArai | 0:5b88d5760320 | 988 | delete query; |
kenjiArai | 0:5b88d5760320 | 989 | dns_query_queue[index] = NULL; |
kenjiArai | 0:5b88d5760320 | 990 | |
kenjiArai | 0:5b88d5760320 | 991 | return NSAPI_ERROR_OK; |
kenjiArai | 0:5b88d5760320 | 992 | } |
kenjiArai | 0:5b88d5760320 | 993 | |
kenjiArai | 0:5b88d5760320 | 994 | static void nsapi_dns_query_async_resp(DNS_QUERY *query, nsapi_error_t status, SocketAddress *address) |
kenjiArai | 0:5b88d5760320 | 995 | { |
kenjiArai | 0:5b88d5760320 | 996 | NetworkStack::hostbyname_cb_t callback = query->callback; |
kenjiArai | 0:5b88d5760320 | 997 | nsapi_dns_query_async_delete(query->unique_id); |
kenjiArai | 0:5b88d5760320 | 998 | nsapi_dns_query_async_initiate_next(); |
kenjiArai | 0:5b88d5760320 | 999 | |
kenjiArai | 0:5b88d5760320 | 1000 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 1001 | |
kenjiArai | 0:5b88d5760320 | 1002 | if (callback) { |
kenjiArai | 0:5b88d5760320 | 1003 | callback(status, address); |
kenjiArai | 0:5b88d5760320 | 1004 | } |
kenjiArai | 0:5b88d5760320 | 1005 | } |
kenjiArai | 0:5b88d5760320 | 1006 | |
kenjiArai | 0:5b88d5760320 | 1007 | static void nsapi_dns_query_async_send(void *ptr) |
kenjiArai | 0:5b88d5760320 | 1008 | { |
kenjiArai | 0:5b88d5760320 | 1009 | dns_mutex->lock(); |
kenjiArai | 0:5b88d5760320 | 1010 | |
kenjiArai | 1:9db0e321a9f4 | 1011 | intptr_t unique_id = reinterpret_cast<intptr_t>(ptr); |
kenjiArai | 0:5b88d5760320 | 1012 | |
kenjiArai | 0:5b88d5760320 | 1013 | DNS_QUERY *query = NULL; |
kenjiArai | 0:5b88d5760320 | 1014 | |
kenjiArai | 0:5b88d5760320 | 1015 | for (int i = 0; i < DNS_QUERY_QUEUE_SIZE; i++) { |
kenjiArai | 0:5b88d5760320 | 1016 | if (dns_query_queue[i] && dns_query_queue[i]->unique_id == unique_id) { |
kenjiArai | 0:5b88d5760320 | 1017 | query = dns_query_queue[i]; |
kenjiArai | 0:5b88d5760320 | 1018 | break; |
kenjiArai | 0:5b88d5760320 | 1019 | } |
kenjiArai | 0:5b88d5760320 | 1020 | } |
kenjiArai | 0:5b88d5760320 | 1021 | |
kenjiArai | 0:5b88d5760320 | 1022 | if (!query || query->state != DNS_INITIATED) { |
kenjiArai | 0:5b88d5760320 | 1023 | // Cancel has been called |
kenjiArai | 0:5b88d5760320 | 1024 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 1025 | return; |
kenjiArai | 0:5b88d5760320 | 1026 | } |
kenjiArai | 0:5b88d5760320 | 1027 | |
kenjiArai | 0:5b88d5760320 | 1028 | if (query->retries) { |
kenjiArai | 0:5b88d5760320 | 1029 | query->retries--; |
kenjiArai | 0:5b88d5760320 | 1030 | } else { |
kenjiArai | 0:5b88d5760320 | 1031 | query->dns_server++; |
kenjiArai | 0:5b88d5760320 | 1032 | query->retries = MBED_CONF_NSAPI_DNS_RETRIES; |
kenjiArai | 0:5b88d5760320 | 1033 | } |
kenjiArai | 0:5b88d5760320 | 1034 | |
kenjiArai | 0:5b88d5760320 | 1035 | query->dns_message_id = dns_message_id++; |
kenjiArai | 0:5b88d5760320 | 1036 | if (dns_message_id == 0) { |
kenjiArai | 0:5b88d5760320 | 1037 | dns_message_id = 1; |
kenjiArai | 0:5b88d5760320 | 1038 | } |
kenjiArai | 0:5b88d5760320 | 1039 | |
kenjiArai | 0:5b88d5760320 | 1040 | // create network packet |
kenjiArai | 0:5b88d5760320 | 1041 | uint8_t *packet = (uint8_t *)malloc(DNS_BUFFER_SIZE); |
kenjiArai | 0:5b88d5760320 | 1042 | if (!packet) { |
kenjiArai | 0:5b88d5760320 | 1043 | nsapi_dns_query_async_resp(query, NSAPI_ERROR_NO_MEMORY, NULL); |
kenjiArai | 0:5b88d5760320 | 1044 | return; |
kenjiArai | 0:5b88d5760320 | 1045 | } |
kenjiArai | 0:5b88d5760320 | 1046 | |
kenjiArai | 0:5b88d5760320 | 1047 | while (true) { |
kenjiArai | 0:5b88d5760320 | 1048 | SocketAddress dns_addr; |
kenjiArai | 0:5b88d5760320 | 1049 | nsapi_size_or_error_t err = nsapi_dns_get_server_addr(query->stack, &(query->dns_server), &(query->total_attempts), &(query->send_success), &dns_addr, query->interface_name); |
kenjiArai | 0:5b88d5760320 | 1050 | if (err != NSAPI_ERROR_OK) { |
kenjiArai | 0:5b88d5760320 | 1051 | nsapi_dns_query_async_resp(query, NSAPI_ERROR_TIMEOUT, NULL); |
kenjiArai | 0:5b88d5760320 | 1052 | free(packet); |
kenjiArai | 0:5b88d5760320 | 1053 | return; |
kenjiArai | 0:5b88d5760320 | 1054 | } |
kenjiArai | 0:5b88d5760320 | 1055 | |
kenjiArai | 1:9db0e321a9f4 | 1056 | if (query->version != NSAPI_UNSPEC && dns_addr.get_ip_version() != query->version) { |
kenjiArai | 1:9db0e321a9f4 | 1057 | query->dns_server++; |
kenjiArai | 1:9db0e321a9f4 | 1058 | continue; |
kenjiArai | 1:9db0e321a9f4 | 1059 | } |
kenjiArai | 1:9db0e321a9f4 | 1060 | // send the question |
kenjiArai | 1:9db0e321a9f4 | 1061 | int len = dns_append_question(packet, query->dns_message_id, query->host, dns_addr.get_ip_version()); |
kenjiArai | 1:9db0e321a9f4 | 1062 | |
kenjiArai | 0:5b88d5760320 | 1063 | err = query->socket->sendto(dns_addr, packet, len); |
kenjiArai | 0:5b88d5760320 | 1064 | |
kenjiArai | 0:5b88d5760320 | 1065 | if (err < 0) { |
kenjiArai | 0:5b88d5760320 | 1066 | if (err == NSAPI_ERROR_WOULD_BLOCK) { |
kenjiArai | 0:5b88d5760320 | 1067 | nsapi_dns_call_in(query->call_in_cb, DNS_TIMER_TIMEOUT, mbed::callback(nsapi_dns_query_async_send, ptr)); |
kenjiArai | 0:5b88d5760320 | 1068 | free(packet); |
kenjiArai | 0:5b88d5760320 | 1069 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 1070 | return; // Timeout handler will retry the connection if possible |
kenjiArai | 0:5b88d5760320 | 1071 | } else { |
kenjiArai | 0:5b88d5760320 | 1072 | query->dns_server++; |
kenjiArai | 0:5b88d5760320 | 1073 | } |
kenjiArai | 0:5b88d5760320 | 1074 | } else { |
kenjiArai | 0:5b88d5760320 | 1075 | break; |
kenjiArai | 0:5b88d5760320 | 1076 | } |
kenjiArai | 0:5b88d5760320 | 1077 | } |
kenjiArai | 0:5b88d5760320 | 1078 | |
kenjiArai | 0:5b88d5760320 | 1079 | query->send_success++; |
kenjiArai | 0:5b88d5760320 | 1080 | |
kenjiArai | 0:5b88d5760320 | 1081 | if (query->total_attempts) { |
kenjiArai | 0:5b88d5760320 | 1082 | query->total_attempts--; |
kenjiArai | 0:5b88d5760320 | 1083 | } |
kenjiArai | 0:5b88d5760320 | 1084 | |
kenjiArai | 0:5b88d5760320 | 1085 | free(packet); |
kenjiArai | 0:5b88d5760320 | 1086 | |
kenjiArai | 0:5b88d5760320 | 1087 | query->socket_timeout = MBED_CONF_NSAPI_DNS_RESPONSE_WAIT_TIME; |
kenjiArai | 0:5b88d5760320 | 1088 | |
kenjiArai | 0:5b88d5760320 | 1089 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 1090 | } |
kenjiArai | 0:5b88d5760320 | 1091 | |
kenjiArai | 0:5b88d5760320 | 1092 | static void nsapi_dns_query_async_socket_callback(void *ptr) |
kenjiArai | 0:5b88d5760320 | 1093 | { |
kenjiArai | 0:5b88d5760320 | 1094 | SOCKET_CB_DATA *cb_data = static_cast<SOCKET_CB_DATA *>(ptr); |
kenjiArai | 0:5b88d5760320 | 1095 | |
kenjiArai | 0:5b88d5760320 | 1096 | if (cb_data) { |
kenjiArai | 0:5b88d5760320 | 1097 | nsapi_dns_call_in(cb_data->call_in_cb, 0, mbed::callback(nsapi_dns_query_async_socket_callback_handle, cb_data->stack)); |
kenjiArai | 0:5b88d5760320 | 1098 | } |
kenjiArai | 0:5b88d5760320 | 1099 | } |
kenjiArai | 0:5b88d5760320 | 1100 | |
kenjiArai | 0:5b88d5760320 | 1101 | static void nsapi_dns_query_async_socket_callback_handle(NetworkStack *stack) |
kenjiArai | 0:5b88d5760320 | 1102 | { |
kenjiArai | 0:5b88d5760320 | 1103 | UDPSocket *socket = NULL; |
kenjiArai | 0:5b88d5760320 | 1104 | |
kenjiArai | 0:5b88d5760320 | 1105 | dns_mutex->lock(); |
kenjiArai | 0:5b88d5760320 | 1106 | |
kenjiArai | 0:5b88d5760320 | 1107 | for (int i = 0; i < DNS_QUERY_QUEUE_SIZE; i++) { |
kenjiArai | 0:5b88d5760320 | 1108 | if (dns_query_queue[i] && dns_query_queue[i]->stack == stack) { |
kenjiArai | 0:5b88d5760320 | 1109 | socket = dns_query_queue[i]->socket; |
kenjiArai | 0:5b88d5760320 | 1110 | break; |
kenjiArai | 0:5b88d5760320 | 1111 | } |
kenjiArai | 0:5b88d5760320 | 1112 | } |
kenjiArai | 0:5b88d5760320 | 1113 | |
kenjiArai | 0:5b88d5760320 | 1114 | if (socket) { |
kenjiArai | 0:5b88d5760320 | 1115 | // create network packet |
kenjiArai | 0:5b88d5760320 | 1116 | uint8_t *packet = (uint8_t *)malloc(DNS_BUFFER_SIZE); |
kenjiArai | 0:5b88d5760320 | 1117 | if (!packet) { |
kenjiArai | 0:5b88d5760320 | 1118 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 1119 | return; |
kenjiArai | 0:5b88d5760320 | 1120 | } |
kenjiArai | 0:5b88d5760320 | 1121 | |
kenjiArai | 0:5b88d5760320 | 1122 | while (true) { |
kenjiArai | 0:5b88d5760320 | 1123 | // recv the response |
kenjiArai | 0:5b88d5760320 | 1124 | nsapi_size_or_error_t size = socket->recvfrom(NULL, packet, DNS_BUFFER_SIZE); |
kenjiArai | 0:5b88d5760320 | 1125 | |
kenjiArai | 0:5b88d5760320 | 1126 | if (size < DNS_RESPONSE_MIN_SIZE) { |
kenjiArai | 0:5b88d5760320 | 1127 | break; |
kenjiArai | 0:5b88d5760320 | 1128 | } |
kenjiArai | 0:5b88d5760320 | 1129 | |
kenjiArai | 0:5b88d5760320 | 1130 | // gets id from response to associate with correct query |
kenjiArai | 0:5b88d5760320 | 1131 | uint16_t id = (packet[0] << 8) | packet[1]; |
kenjiArai | 0:5b88d5760320 | 1132 | |
kenjiArai | 0:5b88d5760320 | 1133 | DNS_QUERY *query = NULL; |
kenjiArai | 0:5b88d5760320 | 1134 | |
kenjiArai | 0:5b88d5760320 | 1135 | for (int i = 0; i < DNS_QUERY_QUEUE_SIZE; i++) { |
kenjiArai | 0:5b88d5760320 | 1136 | if (dns_query_queue[i] && dns_query_queue[i]->dns_message_id == id) { |
kenjiArai | 0:5b88d5760320 | 1137 | query = dns_query_queue[i]; |
kenjiArai | 0:5b88d5760320 | 1138 | break; |
kenjiArai | 0:5b88d5760320 | 1139 | } |
kenjiArai | 0:5b88d5760320 | 1140 | } |
kenjiArai | 0:5b88d5760320 | 1141 | |
kenjiArai | 0:5b88d5760320 | 1142 | if (!query || query->state != DNS_INITIATED) { |
kenjiArai | 0:5b88d5760320 | 1143 | continue; |
kenjiArai | 0:5b88d5760320 | 1144 | } |
kenjiArai | 0:5b88d5760320 | 1145 | |
kenjiArai | 0:5b88d5760320 | 1146 | int requested_count = 1; |
kenjiArai | 0:5b88d5760320 | 1147 | if (query->addr_count > 1) { |
kenjiArai | 0:5b88d5760320 | 1148 | requested_count = query->addr_count; |
kenjiArai | 0:5b88d5760320 | 1149 | } |
kenjiArai | 0:5b88d5760320 | 1150 | |
kenjiArai | 0:5b88d5760320 | 1151 | query->addrs = new (std::nothrow) nsapi_addr_t[requested_count]; |
kenjiArai | 0:5b88d5760320 | 1152 | |
kenjiArai | 0:5b88d5760320 | 1153 | int resp = dns_scan_response(packet, id, &(query->ttl), query->addrs, requested_count); |
kenjiArai | 0:5b88d5760320 | 1154 | |
kenjiArai | 0:5b88d5760320 | 1155 | // Ignore invalid responses |
kenjiArai | 0:5b88d5760320 | 1156 | if (resp < 0) { |
kenjiArai | 0:5b88d5760320 | 1157 | delete[] query->addrs; |
kenjiArai | 0:5b88d5760320 | 1158 | query->addrs = 0; |
kenjiArai | 0:5b88d5760320 | 1159 | } else { |
kenjiArai | 0:5b88d5760320 | 1160 | query->count = resp; |
kenjiArai | 0:5b88d5760320 | 1161 | query->status = NSAPI_ERROR_DNS_FAILURE; // Used in case failure, otherwise ok |
kenjiArai | 0:5b88d5760320 | 1162 | query->socket_timeout = 0; |
kenjiArai | 0:5b88d5760320 | 1163 | nsapi_dns_call_in(query->call_in_cb, 0, mbed::callback(nsapi_dns_query_async_response, reinterpret_cast<void *>(query->unique_id))); |
kenjiArai | 0:5b88d5760320 | 1164 | } |
kenjiArai | 0:5b88d5760320 | 1165 | } |
kenjiArai | 0:5b88d5760320 | 1166 | |
kenjiArai | 0:5b88d5760320 | 1167 | free(packet); |
kenjiArai | 0:5b88d5760320 | 1168 | } |
kenjiArai | 0:5b88d5760320 | 1169 | |
kenjiArai | 0:5b88d5760320 | 1170 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 1171 | } |
kenjiArai | 0:5b88d5760320 | 1172 | |
kenjiArai | 0:5b88d5760320 | 1173 | static void nsapi_dns_query_async_response(void *ptr) |
kenjiArai | 0:5b88d5760320 | 1174 | { |
kenjiArai | 0:5b88d5760320 | 1175 | dns_mutex->lock(); |
kenjiArai | 0:5b88d5760320 | 1176 | |
kenjiArai | 1:9db0e321a9f4 | 1177 | intptr_t unique_id = reinterpret_cast<intptr_t>(ptr); |
kenjiArai | 0:5b88d5760320 | 1178 | |
kenjiArai | 0:5b88d5760320 | 1179 | DNS_QUERY *query = NULL; |
kenjiArai | 0:5b88d5760320 | 1180 | |
kenjiArai | 0:5b88d5760320 | 1181 | for (int i = 0; i < DNS_QUERY_QUEUE_SIZE; i++) { |
kenjiArai | 0:5b88d5760320 | 1182 | if (dns_query_queue[i] && dns_query_queue[i]->unique_id == unique_id) { |
kenjiArai | 0:5b88d5760320 | 1183 | query = dns_query_queue[i]; |
kenjiArai | 0:5b88d5760320 | 1184 | break; |
kenjiArai | 0:5b88d5760320 | 1185 | } |
kenjiArai | 0:5b88d5760320 | 1186 | } |
kenjiArai | 0:5b88d5760320 | 1187 | |
kenjiArai | 0:5b88d5760320 | 1188 | if (query && query->state == DNS_INITIATED) { |
kenjiArai | 0:5b88d5760320 | 1189 | SocketAddress *addresses = NULL; |
kenjiArai | 0:5b88d5760320 | 1190 | nsapi_error_t status = query->status; |
kenjiArai | 0:5b88d5760320 | 1191 | |
kenjiArai | 0:5b88d5760320 | 1192 | if (query->count > 0) { |
kenjiArai | 0:5b88d5760320 | 1193 | addresses = new (std::nothrow) SocketAddress[query->count]; |
kenjiArai | 0:5b88d5760320 | 1194 | |
kenjiArai | 0:5b88d5760320 | 1195 | for (int i = 0; i < query->count; i++) { |
kenjiArai | 0:5b88d5760320 | 1196 | addresses[i].set_addr(query->addrs[i]); |
kenjiArai | 0:5b88d5760320 | 1197 | } |
kenjiArai | 0:5b88d5760320 | 1198 | |
kenjiArai | 0:5b88d5760320 | 1199 | // Adds address to cache |
kenjiArai | 0:5b88d5760320 | 1200 | nsapi_dns_cache_add(query->host, &(query->addrs[0]), query->ttl); |
kenjiArai | 0:5b88d5760320 | 1201 | |
kenjiArai | 0:5b88d5760320 | 1202 | status = NSAPI_ERROR_OK; |
kenjiArai | 0:5b88d5760320 | 1203 | if (query->addr_count > 0) { |
kenjiArai | 0:5b88d5760320 | 1204 | status = query->count; |
kenjiArai | 0:5b88d5760320 | 1205 | } |
kenjiArai | 0:5b88d5760320 | 1206 | } |
kenjiArai | 0:5b88d5760320 | 1207 | |
kenjiArai | 0:5b88d5760320 | 1208 | nsapi_dns_query_async_resp(query, status, addresses); |
kenjiArai | 0:5b88d5760320 | 1209 | delete[] addresses; |
kenjiArai | 0:5b88d5760320 | 1210 | } else { |
kenjiArai | 0:5b88d5760320 | 1211 | dns_mutex->unlock(); |
kenjiArai | 0:5b88d5760320 | 1212 | } |
kenjiArai | 0:5b88d5760320 | 1213 | } |