From 2eb6058b817589f5dfb94b28a55a66af9adf32c6 Mon Sep 17 00:00:00 2001
From: t <a@b>
Date: Sun, 31 May 2026 05:54:24 +0000
Subject: [PATCH] tests: verify AFP timestamp plausibility in smoke suite

---
 tests/afp/afp_set_file_info_smoke.c | 69 +++++++++++++++++++++++++++++
 tests/afp/afp_smoke_suite.sh        | 16 +++++++
 2 files changed, 85 insertions(+)

diff --git a/tests/afp/afp_set_file_info_smoke.c b/tests/afp/afp_set_file_info_smoke.c
index 12195e2..802488b 100644
--- a/tests/afp/afp_set_file_info_smoke.c
+++ b/tests/afp/afp_set_file_info_smoke.c
@@ -134,6 +134,39 @@ static int epoch_to_nw_time(uint32_t epoch, uint8_t out[4])
     return 0;
 }
 
+
+static int nw_date_plausible(uint16_t date)
+{
+    unsigned int year = 1980 + ((date >> 9) & 0x7f);
+    unsigned int month = (date >> 5) & 0x0f;
+    unsigned int day = date & 0x1f;
+
+    if (!date)
+        return 0;
+    if (year < 1990 || year > 2107)
+        return 0;
+    if (month < 1 || month > 12)
+        return 0;
+    if (day < 1 || day > 31)
+        return 0;
+    return 1;
+}
+
+static int nw_timestamp_plausible(const uint8_t value[4])
+{
+    uint16_t date = be16_to_cpu(value + 0);
+    uint16_t timev = be16_to_cpu(value + 2);
+    unsigned int hour = (timev >> 11) & 0x1f;
+    unsigned int minute = (timev >> 5) & 0x3f;
+    unsigned int second2 = timev & 0x1f;
+
+    if (!nw_date_plausible(date))
+        return 0;
+    if (hour > 23 || minute > 59 || second2 > 29)
+        return 0;
+    return 1;
+}
+
 static NWCCODE afp_get_file_info(NWCONN_HANDLE conn, const char *path,
                                  uint32_t volume_number, uint32_t entry_id,
                                  uint8_t reply_buf[AFP_REPLY_LEN])
@@ -524,6 +557,15 @@ int main(int argc, char **argv)
         return 1;
     }
 
+    if ((request_mask & AFP_ACCESS_DATE_MASK) &&
+        !nw_date_plausible(be16_to_cpu(verify_buf + 22))) {
+        fprintf(stderr,
+                "AFP Set File Information access timestamp implausible: path=%s got=0x%04x\n",
+                path, be16_to_cpu(verify_buf + 22));
+        ncp_close(conn);
+        return 1;
+    }
+
     if ((request_mask & AFP_ACCESS_DATE_MASK) &&
         memcmp(verify_buf + 22, access_time, 2)) {
         fprintf(stderr,
@@ -534,6 +576,15 @@ int main(int argc, char **argv)
         return 1;
     }
 
+    if ((request_mask & AFP_CREATE_DATE_MASK) &&
+        !nw_date_plausible(be16_to_cpu(verify_buf + 20))) {
+        fprintf(stderr,
+                "AFP Set File Information create timestamp implausible: path=%s got=0x%04x\n",
+                path, be16_to_cpu(verify_buf + 20));
+        ncp_close(conn);
+        return 1;
+    }
+
     if ((request_mask & AFP_CREATE_DATE_MASK) &&
         memcmp(verify_buf + 20, create_time, 2)) {
         fprintf(stderr,
@@ -544,6 +595,15 @@ int main(int argc, char **argv)
         return 1;
     }
 
+    if ((request_mask & AFP_MODIFY_DATE_MASK) &&
+        !nw_timestamp_plausible(verify_buf + 24)) {
+        fprintf(stderr,
+                "AFP Set File Information modify timestamp implausible: path=%s got=0x%04x%04x\n",
+                path, be16_to_cpu(verify_buf + 24), be16_to_cpu(verify_buf + 26));
+        ncp_close(conn);
+        return 1;
+    }
+
     if ((request_mask & AFP_MODIFY_DATE_MASK) &&
         memcmp(verify_buf + 24, modify_time, sizeof(modify_time))) {
         fprintf(stderr,
@@ -554,6 +614,15 @@ int main(int argc, char **argv)
         return 1;
     }
 
+    if ((request_mask & AFP_BACKUP_DATE_MASK) &&
+        !nw_timestamp_plausible(verify_buf + 28)) {
+        fprintf(stderr,
+                "AFP Set File Information backup timestamp implausible: path=%s got=0x%04x%04x\n",
+                path, be16_to_cpu(verify_buf + 28), be16_to_cpu(verify_buf + 30));
+        ncp_close(conn);
+        return 1;
+    }
+
     if ((request_mask & AFP_BACKUP_DATE_MASK) &&
         memcmp(verify_buf + 28, backup_time, sizeof(backup_time))) {
         fprintf(stderr,
diff --git a/tests/afp/afp_smoke_suite.sh b/tests/afp/afp_smoke_suite.sh
index ec153a3..c60d3ae 100755
--- a/tests/afp/afp_smoke_suite.sh
+++ b/tests/afp/afp_smoke_suite.sh
@@ -282,6 +282,17 @@ cleanup_created_file() {
     fi
 }
 
+
+verify_mtime_epoch() {
+    local path=$1
+    local expected=$2
+    local actual
+
+    actual=$(stat -c '%Y' "$path") || return 1
+    printf 'mtime_epoch=%s expected=%s\n' "$actual" "$expected"
+    test "$actual" = "$expected"
+}
+
 run_optional_cmd() {
     local label=$1
     local printable=$2
@@ -821,6 +832,11 @@ if command -v stat >/dev/null 2>&1; then
         "Linux stat: AFP Modify Timestamp" \
         "stat -c 'mtime_epoch=%Y mtime=%y' '$UNIX_PATH'" \
         stat -c 'mtime_epoch=%Y mtime=%y' "$UNIX_PATH"
+
+    run_cmd \
+        "Linux stat: AFP Modify Timestamp exact epoch" \
+        "test \"$(stat -c '%Y' '$UNIX_PATH')\" = '$TIMESTAMP_EPOCH'" \
+        verify_mtime_epoch "$UNIX_PATH" "$TIMESTAMP_EPOCH"
 fi
 
 if command -v getfattr >/dev/null 2>&1; then