From dc55a7fc6c5e134449d1745ec07ca1273c1c2efb Mon Sep 17 00:00:00 2001
From: XANTRONIX Development <dev@xantronix.com>
Date: Sat, 23 May 2020 13:21:34 -0400
Subject: [PATCH] Prettification, set errno on errors

---
 src/frame.c | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/src/frame.c b/src/frame.c
index ad149a1..dbcaba9 100644
--- a/src/frame.c
+++ b/src/frame.c
@@ -3,7 +3,9 @@
 
 #include <patty/ax25.h>
 
-static ssize_t frame_decode_station(patty_ax25_address *address, void *data, off_t offset) {
+static ssize_t frame_decode_station(patty_ax25_address *address,
+                                    void *data,
+                                    off_t offset) {
     int i, space = 0;
     uint8_t ssid = ((uint8_t *)data + offset)[6];
 
@@ -59,7 +61,9 @@ error:
     return -1;
 }
 
-static ssize_t frame_decode_hops(patty_ax25_frame *frame, void *data, off_t start) {
+static ssize_t frame_decode_hops(patty_ax25_frame *frame,
+                                 void *data,
+                                 off_t start) {
     ssize_t decoded;
       off_t offset = start;
 
@@ -101,7 +105,9 @@ error:
     return -1;
 }
 
-static ssize_t frame_decode_address(patty_ax25_frame *frame, void *data, off_t start) {
+static ssize_t frame_decode_address(patty_ax25_frame *frame,
+                                    void *data,
+                                    off_t start) {
       off_t offset = start;
     ssize_t decoded;
 
@@ -153,7 +159,9 @@ error:
     return -1;
 }
 
-static ssize_t frame_decode_payload(patty_ax25_frame *frame, void *data, off_t offset) {
+static ssize_t frame_decode_payload(patty_ax25_frame *frame,
+                                    void *data,
+                                    off_t offset) {
     uint8_t control = ((uint8_t *)data + offset)[0];
      size_t decoded = 0;
 
@@ -206,7 +214,7 @@ error:
 
 int patty_ax25_frame_decode(patty_ax25_frame *frame, void *data, size_t size) {
     ssize_t decoded;
-      off_t offset = 0;
+    off_t offset = 0;
 
     memset(frame, '\0', sizeof(*frame));
 
@@ -216,16 +224,20 @@ int patty_ax25_frame_decode(patty_ax25_frame *frame, void *data, size_t size) {
      * First, decode the variable-length Address field.
      */
     if ((decoded = frame_decode_address(frame, data, offset)) < 0) {
+        errno = EIO;
+
         goto error_decode;
     } else {
         offset += decoded;
     }
 
     /*
-     * Now, decode the remaining Control Field, optional Protocol Identifier
+     * Next, decode the remaining Control Field, optional Protocol Identifier
      * field, and payload that may follow.
      */
     if ((decoded = frame_decode_payload(frame, data, offset)) < 0) {
+        errno = EIO;
+
         goto error_decode;
     } else {
         offset += decoded;