From 9a32b6144d8a9d7aedfa696e0aa8572c13c58480 Mon Sep 17 00:00:00 2001
From: Amisha Jain <quic_amisjain@quicinc.com>
Date: Tue, 4 Mar 2025 17:28:56 +0530
Subject: [PATCH] obex: Add messages_get_message() implementation for MAP
 plugin

GET Message() operation should be supported for passing below PTS
testcases -

1.MAP/MSE/MMB/BV-12-C
  Verify that the MSE can return an email message to the MCE.
2.MAP/MSE/MMB/BV-13-C
  Verify that the MSE can return a a*n* SMS message in native format
  to the MCE.
3.MAP/MSE/MMB/BV-14-C
  Verify that the MSE can return a SMS message with text trans-coded
  to UTF-8 to the MCE.

Currently get message operation is not implemented, hence above
testcases are failing.
Added code to send the complete bmessage in response to the get() request
for the requested message handle.

As per suggested in previous patch, mmap() is being used
for reading file.
---
 obexd/plugins/mas.c            |  5 ++--
 obexd/plugins/messages-dummy.c | 50 +++++++++++++++++++++++++++++++++-
 2 files changed, 52 insertions(+), 3 deletions(-)

diff --git a/obexd/plugins/mas.c b/obexd/plugins/mas.c
index 10b972d65..bf8d689ad 100644
--- a/obexd/plugins/mas.c
+++ b/obexd/plugins/mas.c
@@ -408,6 +408,7 @@ static void get_message_cb(void *session, int err, gboolean fmore,
 	}
 
 	g_string_append(mas->buffer, chunk);
+	mas->finished = TRUE;
 
 proceed:
 	if (err != -EAGAIN)
@@ -612,11 +613,11 @@ static void *message_open(const char *name, int oflag, mode_t mode,
 		return NULL;
 	}
 
+	mas->buffer = g_string_new("");
+
 	*err = messages_get_message(mas->backend_data, name, 0,
 			get_message_cb, mas);
 
-	mas->buffer = g_string_new("");
-
 	if (*err < 0)
 		return NULL;
 	else
diff --git a/obexd/plugins/messages-dummy.c b/obexd/plugins/messages-dummy.c
index e313c6163..945f30cad 100644
--- a/obexd/plugins/messages-dummy.c
+++ b/obexd/plugins/messages-dummy.c
@@ -18,6 +18,8 @@
 #include <errno.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
 
 #include "obexd/src/log.h"
 
@@ -516,7 +518,53 @@ int messages_get_message(void *session, const char *handle,
 					messages_get_message_cb callback,
 					void *user_data)
 {
-	return -ENOSYS;
+	struct session *s =  session;
+	FILE *fp;
+	char *path;
+	char *msg, *buffer;
+	int file_size, err = 0;
+	struct stat file_info;
+
+	DBG(" ");
+	path = g_build_filename(s->cwd_absolute, handle, NULL);
+	fp = fopen(path, "r");
+	if (!fp) {
+		DBG("fopen() failed");
+		err = -EBADR;
+		goto file_open_err;
+	}
+
+	if (fstat(fileno(fp), &file_info) < 0) {
+		DBG("Error getting file size");
+		err = -EBADR;
+		goto mmap_err;
+	}
+
+	file_size = file_info.st_size;
+
+	msg = mmap(0, file_size, PROT_READ, MAP_PRIVATE, fileno(fp), 0);
+	if (msg == MAP_FAILED) {
+		DBG("Error mapping file");
+		err = -EBADR;
+		goto mmap_err;
+	}
+
+	buffer = strndup(msg, file_size);
+
+	if (callback)
+		callback(session, 0, 0, buffer, user_data);
+
+	if (munmap(msg, file_size) == -1) {
+		DBG("Error unmapping");
+		err = -EBADR;
+	}
+
+	free(buffer);
+mmap_err:
+	fclose(fp);
+file_open_err:
+	g_free(path);
+	return err;
 }
 
 int messages_update_inbox(void *session, messages_status_cb callback,
-- 
2.47.3