[PATCH 1/2] SMSD: files: Write MessageReference to the sent SMS

Before, the file backend only printed the MessageReference,
and didn't add it back to the SMS file.
In contrast, the libsql backend does store it.

Without this patch, When processing the SMS with an external application,
The only way to match a sent SMS with its delivery report would be to parse
gammu-smsd logs.

Signed-off-by: Denis Carikli <[email protected]>
---
 smsd/services/files.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/smsd/services/files.c b/smsd/services/files.c
index 7628e62..467d06e 100644
--- a/smsd/services/files.c
+++ b/smsd/services/files.c
@@ -590,12 +590,65 @@ fail:
 
 static GSM_Error SMSDFiles_AddSentSMSInfo(GSM_MultiSMSMessage * sms UNUSED, GSM_SMSDConfig * Config, char *ID UNUSED, int Part, GSM_SMSDSendingError err, int TPMR)
 {
+	FILE *file;
+	size_t flen = 0;
+	unsigned char FullPath[400];
+	char Buffer[(GSM_MAX_SMS_LENGTH * GSM_MAX_MULTI_SMS + 1) * 2];
+	char *lineStart, *lineEnd;
+	/* MessageReference TPMR maximum is "255" */
+	char MessageReferenceBuffer[sizeof("MessageReference = \n") + 4];
+	int written;
+
 	if (err == SMSD_SEND_OK) {
 		SMSD_Log(DEBUG_INFO, Config, "Transmitted %s (%s: %i) to %s, message reference 0x%02x",
 			 Config->SMSID, (Part == sms->Number ? "total" : "part"), Part, DecodeUnicodeString(sms->SMS[0].Number), TPMR);
 	}
 
+	strcpy(FullPath, Config->outboxpath);
+	strcat(FullPath, Config->SMSID);
+
+	file = fopen(FullPath, "r");
+	if (file == NULL) {
+		return ERR_CANTOPENFILE;
+	}
+
+	flen = fread(Buffer, 1, sizeof(Buffer), file);
+	fclose(file);
+
+	lineStart = Buffer;
+	lineEnd = strchr(lineStart, '\n');
+
+	while (lineStart - Buffer +1 < flen) {
+		lineStart = lineEnd + 1;
+		lineEnd = strchr(lineStart, '\n');
+
+		if(!strncmp("MessageReference = ", lineStart, 19)) {
+			break;
+		}
+	}
+
+	file = fopen(FullPath, "w");
+	if (file == NULL) {
+		return ERR_CANTOPENFILE;
+	}
+
+	chk_fwrite(Buffer, lineStart - Buffer, 1, file);
+
+	snprintf(MessageReferenceBuffer, sizeof(MessageReferenceBuffer),
+		 "MessageReference = %d\n", TPMR);
+
+	chk_fwrite(MessageReferenceBuffer, strlen(MessageReferenceBuffer), 1, file);
+
+	chk_fwrite(lineEnd + 1, (size_t)((Buffer + flen - 1) - lineEnd), 1, file);
+
+	fclose(file);
+
 	return ERR_NONE;
+fail:
+	if (file) {
+		fclose(file);
+	}
+	return ERR_WRITING_FILE;
 }
 
 GSM_Error SMSD_Check_Dir(GSM_SMSDConfig *Config, const char *path, const char *name)
-- 
2.4.5


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