Update UDP_broadcast.c
problem resolved
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@@ -97,7 +97,7 @@ static void format_reply(owner_details_t *owner){
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char mac_addr_str[18];
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char* reply_buf = NULL;
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if (owner != NULL) {
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reply_len = 20 + strlen(mac_addr_str) + strlen(owner->surname) + strlen(owner->name);
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reply_len = 20 + sizeof(mac_addr_str) + sizeof(owner->surname) + sizeof(owner->name);
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reply_buf = (char*)malloc(reply_len);
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