From 1fa08e7d1bc614c0e307722c93ff057aee4c12db Mon Sep 17 00:00:00 2001
From: Beniamino Galvani <bgalvani@redhat.com>
Date: Tue, 8 Oct 2024 11:31:19 +0200
Subject: [PATCH] dhcp: add function nm_dhcp_lease_data_parse_u32()

Add a function to parse 32-bit integer values from a DHCP option.
---
 src/core/dhcp/nm-dhcp-utils.c | 21 +++++++++++++++++++++
 src/core/dhcp/nm-dhcp-utils.h |  6 ++++++
 2 files changed, 27 insertions(+)

diff --git a/src/core/dhcp/nm-dhcp-utils.c b/src/core/dhcp/nm-dhcp-utils.c
index d13439f143..6bac4d077b 100644
--- a/src/core/dhcp/nm-dhcp-utils.c
+++ b/src/core/dhcp/nm-dhcp-utils.c
@@ -934,6 +934,27 @@ nm_dhcp_lease_data_parse_u16(const guint8 *data,
     return TRUE;
 }
 
+gboolean
+nm_dhcp_lease_data_parse_u32(const guint8 *data,
+                             gsize         n_data,
+                             uint32_t     *out_val,
+                             const char   *iface,
+                             int           addr_family,
+                             guint         option)
+{
+    if (n_data != 4) {
+        nm_dhcp_lease_log_invalid_option(iface,
+                                         addr_family,
+                                         option,
+                                         "invalid option length %lu",
+                                         (unsigned long) n_data);
+        return FALSE;
+    }
+
+    *out_val = unaligned_read_be32(data);
+    return TRUE;
+}
+
 gboolean
 nm_dhcp_lease_data_parse_mtu(const guint8 *data,
                              gsize         n_data,
diff --git a/src/core/dhcp/nm-dhcp-utils.h b/src/core/dhcp/nm-dhcp-utils.h
index 00199b0222..998985249e 100644
--- a/src/core/dhcp/nm-dhcp-utils.h
+++ b/src/core/dhcp/nm-dhcp-utils.h
@@ -74,6 +74,12 @@ gboolean nm_dhcp_lease_data_parse_u16(const guint8 *data,
                                       const char   *iface,
                                       int           addr_family,
                                       guint         option);
+gboolean nm_dhcp_lease_data_parse_u32(const guint8 *data,
+                                      gsize         n_data,
+                                      uint32_t     *out_val,
+                                      const char   *iface,
+                                      int           addr_family,
+                                      guint         option);
 gboolean nm_dhcp_lease_data_parse_mtu(const guint8 *data,
                                       gsize         n_data,
                                       guint16      *out_val,