staged resolv_worker

* replaced RNG from `rnd` to `mbedtls_ctr_drbg`
* use of `uint_fastN_t` where appropriate
* heartbeat protocol draft
* improved worker scheduling mech

1 files changed, 52 insertions, 0 deletions

diff --git a/src/mbedtls.c b/src/mbedtls.c
new file mode 100644
index 0000000..518da1f
--- /dev/null
+++ b/src/mbedtls.c
@@ -0,0 +1,52 @@
+#include "mbedtls.h"
+
+#include <unistd.h>
+#include <errno.h>
+
+#include <mbedtls/ssl.h>
+
+
+int prne_mbedtls_x509_crt_verify_cb (void *param, mbedtls_x509_crt *crt, int crt_depth, uint32_t *flags) {
+	*flags &= ~MBEDTLS_X509_BADCERT_EXPIRED;
+	return 0;
+}
+
+int prne_mbedtls_ssl_send_cb (void *ctx, const unsigned char *buf, size_t len) {
+	const int fd = *(int*)ctx;
+	ssize_t ret;
+
+	ret = write(fd, buf, len);
+	if (ret < 0) {
+		switch (errno) {
+#if EAGAIN == EWOULDBLOCK
+		case EAGAIN:
+#else
+		case EAGAIN:
+		case EWOULDBLOCK:
+#endif
+			return MBEDTLS_ERR_SSL_WANT_WRITE;
+		}
+	}
+
+	return ret;
+}
+
+int prne_mbedtls_ssl_recv_cb (void *ctx, unsigned char *buf, size_t len) {
+	const int fd = *(int*)ctx;
+	ssize_t ret;
+
+	ret = read(fd, buf, len);
+	if (ret < 0) {
+		switch (errno) {
+#if EAGAIN == EWOULDBLOCK
+		case EAGAIN:
+#else
+		case EAGAIN:
+		case EWOULDBLOCK:
+#endif
+			return MBEDTLS_ERR_SSL_WANT_READ;
+		}
+	}
+
+	return ret;
+}