1 files changed, 94 insertions, 0 deletions
diff --git a/src/resolv.h b/src/resolv.h
new file mode 100644
index 0000000..650406c
--- /dev/null
+++ b/src/resolv.h
@@ -0,0 +1,94 @@
+#pragma once
+#include "protocol.h"
+#include "pth.h"
+
+#include <mbedtls/ctr_drbg.h>
+
+
+struct prne_resolv;
+typedef struct prne_resolv prne_resolv_t;
+
+struct prne_resolv_prm;
+struct prne_resolv_fut;
+struct prne_resolv_rr;
+typedef struct prne_resolv_prm prne_resolv_prm_t;
+typedef struct prne_resolv_fut prne_resolv_fut_t;
+typedef struct prne_resolv_rr prne_resolv_rr_t;
+typedef uint16_t prne_resolv_rcode_t;
+
+typedef enum {
+	PRNE_RESOLV_QR_NONE = -1,
+	
+	PRNE_RESOLV_QR_OK,
+	PRNE_RESOLV_QR_ERR,
+	PRNE_RESOLV_QR_PRO_ERR,
+	PRNE_RESOLV_QR_FIN,
+	PRNE_RESOLV_QR_IMPL,
+	PRNE_RESOLV_QR_TIMEOUT,
+	PRNE_RESOLV_QR_STATUS,
+
+	NB_PRNE_RESOLV
+} prne_resolv_qr_t;
+
+typedef enum {
+	PRNE_RESOLV_QT_NONE = -1,
+
+	PRNE_RESOLV_QT_A,
+	PRNE_RESOLV_QT_AAAA,
+	PRNE_RESOLV_QT_TXT,
+
+	NB_PRNE_RESOLV_QT
+} prne_resolv_query_type_t;
+
+struct prne_resolv_prm {
+	void *ctx;
+	prne_resolv_fut_t *fut;
+};
+
+struct prne_resolv_fut {
+	size_t rr_cnt;
+	prne_resolv_rr_t *rr;
+	int err;
+	prne_resolv_qr_t qr;
+	prne_resolv_rcode_t status;
+};
+
+struct prne_resolv_rr {
+	char *name;
+	uint16_t rr_class, rr_type;
+	uint32_t rr_ttl;
+	uint8_t *rd_data;
+	uint16_t rd_len;
+};
+
+// honor bind-utils' choice of words
+#define PRNE_RESOLV_RCODE_NOERROR	0
+#define PRNE_RESOLV_RCODE_FORMERR	1
+#define PRNE_RESOLV_RCODE_SERVFAIL	2
+#define PRNE_RESOLV_RCODE_NXDOMAIN	3
+#define PRNE_RESOLV_RCODE_NOTIMP	4
+#define PRNE_RESOLV_RCODE_REFUSED	5
+
+#define PRNE_RESOLV_RTYPE_A		1
+#define PRNE_RESOLV_RTYPE_NS	2
+#define PRNE_RESOLV_RTYPE_CNAME	5
+#define PRNE_RESOLV_RTYPE_SOA	6
+#define PRNE_RESOLV_RTYPE_PTR	12
+#define PRNE_RESOLV_RTYPE_MX	15
+#define PRNE_RESOLV_RTYPE_TXT	16
+#define PRNE_RESOLV_RTYPE_AAAA	28
+
+
+prne_resolv_t *prne_alloc_resolv (prne_worker_t *wkr, mbedtls_ctr_drbg_context *ctr_drbg);
+bool prne_resolv_prm_gethostbyname (prne_resolv_t *ctx, const char *name, const prne_ipv_t ipv, prne_pth_cv_t *cv, prne_resolv_prm_t *out);
+bool prne_resolv_prm_gettxtrec (prne_resolv_t *ctx, const char *name, prne_pth_cv_t *cv, prne_resolv_prm_t *out);
+
+void prne_resolv_init_prm (prne_resolv_prm_t *prm);
+void prne_resolv_free_prm (prne_resolv_prm_t *prm);
+void prne_init_resolv_fut (prne_resolv_fut_t *fut);
+void prne_free_resolv_fut (prne_resolv_fut_t *fut);
+void prne_init_resolv_rr (prne_resolv_rr_t *rr);
+void prne_free_resolv_rr (prne_resolv_rr_t *rr);
+const char *prne_resolv_qr_tostr (const prne_resolv_qr_t qr);
+const char *prne_resolv_rcode_tostr (const prne_resolv_rcode_t rc);
+const char *prne_resolv_rrtype_tostr (const uint16_t rrt);