From c5cfecb31108e119e27b4b6d4674b717fd59f847 Mon Sep 17 00:00:00 2001
From: Benjamin Valentin <benjamin.valentin@ml-pa.com>
Date: Thu, 23 May 2024 15:58:29 +0200
Subject: [PATCH] nanocoap_sock: add nanocoap_get_blockwise_to_buf()

---
 sys/include/net/nanocoap_sock.h           | 23 +++++++++++++++++++++++
 sys/net/application_layer/nanocoap/sock.c | 11 +++++++++++
 2 files changed, 34 insertions(+)

diff --git a/sys/include/net/nanocoap_sock.h b/sys/include/net/nanocoap_sock.h
index e079df79cc5c..422cbf149078 100644
--- a/sys/include/net/nanocoap_sock.h
+++ b/sys/include/net/nanocoap_sock.h
@@ -584,6 +584,29 @@ ssize_t nanocoap_get_blockwise_url_to_buf(const char *url,
                                           coap_blksize_t blksize,
                                           void *buf, size_t len);
 
+/**
+ * @brief    Performs a blockwise CoAP GET request, store the response
+ *           in a buffer.
+ *
+ * This function will fetch the content of the specified resource path via
+ * block-wise-transfer.
+ * The blocks will be re-assembled into @p buf
+ *
+ * @param[in]   sock       socket to use for the request
+ * @param[in]   path       pointer to source path
+ * @param[in]   blksize    sender suggested SZX for the COAP block request
+ * @param[in]   buf        Target buffer
+ * @param[in]   len        Target buffer length
+ *
+ * @returns     <0 on error
+ * @returns     -EINVAL    if an invalid url is provided
+ * @returns     -ENOBUFS   if the provided buffer was too small
+ * @returns     size of the response payload on success
+ */
+ssize_t nanocoap_get_blockwise_to_buf(nanocoap_sock_t *sock, const char *path,
+                                      coap_blksize_t blksize,
+                                      void *buf, size_t len);
+
 /**
  * @brief   Simple synchronous CoAP request
  *
diff --git a/sys/net/application_layer/nanocoap/sock.c b/sys/net/application_layer/nanocoap/sock.c
index 1802ad26cdcf..dd7a185f35cd 100644
--- a/sys/net/application_layer/nanocoap/sock.c
+++ b/sys/net/application_layer/nanocoap/sock.c
@@ -811,6 +811,17 @@ ssize_t nanocoap_get_blockwise_url_to_buf(const char *url,
     return (res < 0) ? (ssize_t)res : (ssize_t)_buf.len;
 }
 
+ssize_t nanocoap_get_blockwise_to_buf(nanocoap_sock_t *sock, const char *path,
+                                      coap_blksize_t blksize,
+                                      void *buf, size_t len)
+{
+    _buf_t _buf = { .ptr = buf, .len = len };
+
+    int res = nanocoap_sock_get_blockwise(sock, path, blksize, _2buf, &_buf);
+
+    return (res < 0) ? (ssize_t)res : (ssize_t)_buf.len;
+}
+
 int nanocoap_server(sock_udp_ep_t *local, uint8_t *buf, size_t bufsize)
 {
     nanocoap_sock_t sock;