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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| /** | ||
| * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
| * SPDX-License-Identifier: Apache-2.0. | ||
| */ | ||
|
|
||
| #include <aws/io/host_resolver.h> | ||
|
|
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| #include <aws/io/logging.h> | ||
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| #include <aws/common/string.h> | ||
|
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| #include <arpa/inet.h> | ||
| #include <netdb.h> | ||
| #include <sys/socket.h> | ||
| #include <sys/types.h> | ||
|
|
||
| int aws_default_dns_resolve( | ||
| struct aws_allocator *allocator, | ||
| const struct aws_string *host_name, | ||
| struct aws_array_list *output_addresses, | ||
| void *user_data) { | ||
|
|
||
| (void)user_data; | ||
| struct addrinfo *result = NULL; | ||
| struct addrinfo *iter = NULL; | ||
| /* max string length for ipv6. */ | ||
| socklen_t max_len = INET6_ADDRSTRLEN; | ||
| char address_buffer[max_len]; | ||
|
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| const char *hostname_cstr = aws_string_c_str(host_name); | ||
| AWS_LOGF_DEBUG(AWS_LS_IO_DNS, "static: resolving host %s", hostname_cstr); | ||
|
|
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| /* Android would prefer NO HINTS IF YOU DON'T MIND, SIR */ | ||
| #if defined(ANDROID) | ||
| int err_code = getaddrinfo(hostname_cstr, NULL, NULL, &result); | ||
| #else | ||
| struct addrinfo hints; | ||
| AWS_ZERO_STRUCT(hints); | ||
| hints.ai_family = AF_UNSPEC; | ||
| hints.ai_socktype = SOCK_STREAM; | ||
| # if !defined(__OpenBSD__) | ||
| hints.ai_flags = AI_ALL | AI_V4MAPPED; | ||
| # endif /* __OpenBSD__ */ | ||
|
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| int err_code = getaddrinfo(hostname_cstr, NULL, &hints, &result); | ||
| #endif | ||
|
|
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| if (err_code) { | ||
| AWS_LOGF_ERROR( | ||
| AWS_LS_IO_DNS, "static: getaddrinfo failed with error_code %d: %s", err_code, gai_strerror(err_code)); | ||
| goto clean_up; | ||
| } | ||
|
|
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| for (iter = result; iter != NULL; iter = iter->ai_next) { | ||
| struct aws_host_address host_address; | ||
|
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| AWS_ZERO_ARRAY(address_buffer); | ||
|
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| if (iter->ai_family == AF_INET6) { | ||
| host_address.record_type = AWS_ADDRESS_RECORD_TYPE_AAAA; | ||
| inet_ntop(iter->ai_family, &((struct sockaddr_in6 *)iter->ai_addr)->sin6_addr, address_buffer, max_len); | ||
| } else { | ||
| host_address.record_type = AWS_ADDRESS_RECORD_TYPE_A; | ||
| inet_ntop(iter->ai_family, &((struct sockaddr_in *)iter->ai_addr)->sin_addr, address_buffer, max_len); | ||
| } | ||
|
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| size_t address_len = strlen(address_buffer); | ||
| const struct aws_string *address = | ||
| aws_string_new_from_array(allocator, (const uint8_t *)address_buffer, address_len); | ||
|
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| if (!address) { | ||
| goto clean_up; | ||
| } | ||
|
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| const struct aws_string *host_cpy = aws_string_new_from_string(allocator, host_name); | ||
|
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| if (!host_cpy) { | ||
| aws_string_destroy((void *)address); | ||
| goto clean_up; | ||
| } | ||
|
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| AWS_LOGF_DEBUG(AWS_LS_IO_DNS, "static: resolved record: %s", address_buffer); | ||
|
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| host_address.address = address; | ||
| host_address.weight = 0; | ||
| host_address.allocator = allocator; | ||
| host_address.use_count = 0; | ||
| host_address.connection_failure_count = 0; | ||
| host_address.host = host_cpy; | ||
|
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| if (aws_array_list_push_back(output_addresses, &host_address)) { | ||
| aws_host_address_clean_up(&host_address); | ||
| goto clean_up; | ||
| } | ||
| } | ||
|
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| freeaddrinfo(result); | ||
| return AWS_OP_SUCCESS; | ||
|
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| clean_up: | ||
| if (result) { | ||
| freeaddrinfo(result); | ||
| } | ||
|
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| if (err_code) { | ||
| switch (err_code) { | ||
| case EAI_FAIL: | ||
| case EAI_AGAIN: | ||
| return aws_raise_error(AWS_IO_DNS_QUERY_FAILED); | ||
| case EAI_MEMORY: | ||
| return aws_raise_error(AWS_ERROR_OOM); | ||
| case EAI_NONAME: | ||
| case EAI_SERVICE: | ||
| return aws_raise_error(AWS_IO_DNS_INVALID_NAME); | ||
| default: | ||
| return aws_raise_error(AWS_ERROR_SYS_CALL_FAILURE); | ||
| } | ||
| } | ||
|
|
||
| return AWS_OP_ERR; | ||
| } |
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