9:50 a.m.
From: Inaky Perez-Gonzalez <inaky.perez-gonzalez(a)intel.com>
This adds a simple API to use for generating unique IDs for SMS
messages. Will be used by follow up commits.
The ID is not generic, but specifc to SMS messages (due to having to
dig inside 'struct sms') and thus generates directly 16-bit IDs.
---
src/smsutil.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
src/smsutil.h | 2 +
2 files changed, 80 insertions(+), 0 deletions(-)
diff --git a/src/smsutil.c b/src/smsutil.c
index 22c70cf..b958ee0 100644
--- a/src/smsutil.c
+++ b/src/smsutil.c
@@ -3983,3 +3983,81 @@ char *ussd_decode(int dcs, int len, const unsigned char *data)
return utf8;
}
+
+static
+int __sms_uuid_from_pdu(GChecksum *checksum, const struct sms *sms_pdu)
+{
+ const guint8 *buf;
+ size_t buf_len;
+
+ switch (sms_pdu->type) {
+ case SMS_TYPE_DELIVER:
+ buf = sms_pdu->deliver.ud;
+ buf_len = sms_pdu->deliver.udl;
+ break;
+ case SMS_TYPE_DELIVER_REPORT_ACK:
+ buf = sms_pdu->deliver_ack_report.ud;
+ buf_len = sms_pdu->deliver_ack_report.udl;
+ break;
+ case SMS_TYPE_DELIVER_REPORT_ERROR:
+ buf = sms_pdu->deliver_err_report.ud;
+ buf_len = sms_pdu->deliver_err_report.udl;
+ break;
+ case SMS_TYPE_STATUS_REPORT:
+ buf = sms_pdu->status_report.ud;
+ buf_len = sms_pdu->status_report.udl;
+ break;
+ case SMS_TYPE_SUBMIT:
+ buf = sms_pdu->submit.ud;
+ buf_len = sms_pdu->submit.udl;
+ break;
+ case SMS_TYPE_SUBMIT_REPORT_ACK:
+ buf = sms_pdu->submit_ack_report.ud;
+ buf_len = sms_pdu->submit_ack_report.udl;
+ break;
+ case SMS_TYPE_SUBMIT_REPORT_ERROR:
+ buf = sms_pdu->submit_err_report.ud;
+ buf_len = sms_pdu->submit_err_report.udl;
+ break;
+ case SMS_TYPE_COMMAND:
+ buf = sms_pdu->command.cd;
+ buf_len = sms_pdu->command.cdl;
+ break;
+ default:
+ return 1;
+ }
+ g_checksum_update(checksum, buf, buf_len);
+ return 0;
+}
+
+/**
+ * Generate a UUID from an SMS PDU List
+ *
+ * @param sms_pdu_list GSlist containing 'struct sms' nodes to
+ * generate the UUID from.
+ * @return 0 in error (no memory or serious code inconsistency in the
+ * input data structures), otherwise the SMS UUID.
+ */
+guint16 sms_uuid_from_pdu_list(const GSList *sms_pdu_list)
+{
+ guint16 uuid = 0;
+ GChecksum *checksum;
+ const GSList *node;
+ gsize uuid_size = g_checksum_type_get_length(G_CHECKSUM_SHA256);
+ guint8 data[uuid_size];
+
+ checksum = g_checksum_new(G_CHECKSUM_SHA256);
+ if (checksum == NULL)
+ goto error_new;
+ for (node = sms_pdu_list; node; node = node->next) {
+ struct sms *sms_pdu = node->data;
+ if (__sms_uuid_from_pdu(checksum, sms_pdu))
+ goto error_pdu;
+ }
+ g_checksum_get_digest(checksum, data, &uuid_size);
+ uuid = data[0] | data[1] << 8;
+error_pdu:
+ g_checksum_free(checksum);
+error_new:
+ return uuid;
+}
diff --git a/src/smsutil.h b/src/smsutil.h
index ca64b18..66486b7 100644
--- a/src/smsutil.h
+++ b/src/smsutil.h
@@ -547,3 +547,5 @@ GSList *cbs_optimize_ranges(GSList *ranges);
gboolean cbs_topic_in_range(unsigned int topic, GSList *ranges);
char *ussd_decode(int dcs, int len, const unsigned char *data);
+
+guint16 sms_uuid_from_pdu_list(const GSList *sms_pdu_list);
--
1.6.6.1