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31 lines
850 B
Markdown
31 lines
850 B
Markdown
---
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title: "mg_resolve_async_opt()"
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decl_name: "mg_resolve_async_opt"
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symbol_kind: "func"
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signature: |
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int mg_resolve_async_opt(struct mg_mgr *mgr, const char *name, int query,
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mg_resolve_callback_t cb, void *data,
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struct mg_resolve_async_opts opts);
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---
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Resolved a DNS name asynchronously.
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Upon successful resolution, the user callback will be invoked
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with the full DNS response message and a pointer to the user's
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context `data`.
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In case of timeout while performing the resolution the callback
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will receive a NULL `msg`.
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The DNS answers can be extracted with `mg_next_record` and
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`mg_dns_parse_record_data`:
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[source,c]
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----
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struct in_addr ina;
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struct mg_dns_resource_record *rr = mg_next_record(msg, MG_DNS_A_RECORD,
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NULL);
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mg_dns_parse_record_data(msg, rr, &ina, sizeof(ina));
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----
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