more refactoring and commenting

1 files changed, 4 insertions, 1 deletions

diff --git a/protocol.c b/protocol.c
index 5c8127f..9c8c65b 100644
--- a/protocol.c
+++ b/protocol.c
@@ -4,6 +4,7 @@
 #include "protocol.h"
 
 #define TCP_TIMEOUT 100000 // 100ms in microseconds
+#define MAX_PACKET_SIZE 512
 
 int send_all(int sock, char *buf, int *len)
 {
@@ -18,8 +19,10 @@ int send_all(int sock, char *buf, int *len)
     int bytesleft = *len; // how many we have left to send
     int n;
 
+    // ensure we don't send more than MAX_PACKET_SIZE bytes
+    size_t max_send = bytesleft >= MAX_PACKET_SIZE ? MAX_PACKET_SIZE : bytesleft;
     while(total < *len) {
-        n = send(sock, buf+total, bytesleft, 0);
+        n = send(sock, buf+total, max_send, 0);
         if (n == -1) { break; }
         total += n;
         bytesleft -= n;