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< a name = "l1" > < / a > < span class = cF1 > class< / span > < span class = cF0 > CEthernetFrame
< a name = "l2" > < / a > {
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< a name = "l3" > < / a > < / span > < span class = cF1 > U8< / span > < span class = cF0 > source_address[< / span > < span class = cFE > 6< / span > < span class = cF0 > ];
< a name = "l4" > < / a > < / span > < span class = cF1 > U8< / span > < span class = cF0 > padding[< / span > < span class = cFE > 2< / span > < span class = cF0 > ];
< a name = "l5" > < / a > < / span > < span class = cF1 > U8< / span > < span class = cF0 > destination_address[< / span > < span class = cFE > 6< / span > < span class = cF0 > ];
< a name = "l6" > < / a > < / span > < span class = cF9 > U16< / span > < span class = cF0 > ethertype;
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< a name = "l7" > < / a >
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< a name = "l8" > < / a > < / span > < span class = cF1 > U8< / span > < span class = cF0 > *data;
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< a name = "l9" > < / a >
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< a name = "l10" > < / a > < / span > < span class = cF9 > I64< / span > < span class = cF0 > length;
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< a name = "l11" > < / a > };
< a name = "l12" > < / a >
< a name = "l13" > < / a > < / span > < span class = cF1 > class< / span > < span class = cF0 > CEthernetGlobals
< a name = "l14" > < / a > {
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< a name = "l15" > < / a > < / span > < span class = cF1 > U8< / span > < span class = cF0 > ethernet_null[< / span > < span class = cFE > 6< / span > < span class = cF0 > ];
< a name = "l16" > < / a > < / span > < span class = cF1 > U8< / span > < span class = cF0 > ethernet_broadcast[< / span > < span class = cFE > 6< / span > < span class = cF0 > ];
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< a name = "l17" > < / a >
< a name = "l18" > < / a > } ethernet_globals;
< a name = "l19" > < / a >
< a name = "l20" > < / a > < / span > < span class = cF1 > U0< / span > < span class = cF0 > EthernetGlobalsInit()
< a name = "l21" > < / a > {
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< a name = "l22" > < / a > < / span > < span class = cF9 > I64< / span > < span class = cF0 > i;
< a name = "l23" > < / a > < / span > < span class = cF1 > for< / span > < span class = cF0 > (i = < / span > < span class = cFE > 0< / span > < span class = cF0 > ; i < < / span > < span class = cFE > 6< / span > < span class = cF0 > ; i++)
< a name = "l24" > < / a > < / span > < span class = cF7 > {< / span > < span class = cF0 >
< a name = "l25" > < / a > ethernet_globals.ethernet_null[i] = < / span > < span class = cFE > 0< / span > < span class = cF0 > ;
< a name = "l26" > < / a > ethernet_globals.ethernet_broadcast[i] = < / span > < span class = cFE > 0xFF< / span > < span class = cF0 > ;
< a name = "l27" > < / a > < / span > < span class = cF7 > }< / span > < span class = cF0 >
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< a name = "l28" > < / a > }
< a name = "l29" > < / a >
< a name = "l30" > < / a > < / span > < span class = cF2 > //TODO: check length , figure out the length+4 < / span > < span class = cF0 >
< a name = "l31" > < / a > < / span > < span class = cF1 > U0< / span > < span class = cF0 > EthernetFrameParse(CEthernetFrame *frame_out, < / span > < span class = cF1 > U8< / span > < span class = cF0 > *frame, < / span > < span class = cF9 > U16< / span > < span class = cF0 > length)
< a name = "l32" > < / a > {
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< a name = "l33" > < / a > < / span > < span class = cF2 > //TODO: Check length ! We need to figure out what< / span > < span class = cF0 >
< a name = "l34" > < / a > < / span > < span class = cF2 > //lengths are appropriate ...... Shrine also says MemCopy has a< / span > < span class = cF0 >
< a name = "l35" > < / a > < / span > < span class = cF2 > //high overhead. I'm almost tempted to say that means that a lot< / span > < span class = cF0 >
< a name = "l36" > < / a > < / span > < span class = cF2 > //of the current system should be done with less extra allocation< / span > < span class = cF0 >
< a name = "l37" > < / a > < / span > < span class = cF2 > //altogether, more passing.< / span > < span class = cF0 >
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< a name = "l38" > < / a >
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< a name = "l39" > < / a > NetLog(< / span > < span class = cF6 > " ETHERNET FRAME PARSE: Parsing frame, copying out to frame_out param." < / span > < span class = cF0 > );
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< a name = "l40" > < / a >
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< a name = "l41" > < / a > < / span > < span class = cF5 > MemCopy< / span > < span class = cF0 > (frame_out-> destination_address, frame, MAC_ADDRESS_LENGTH);
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< a name = "l42" > < / a >
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< a name = "l43" > < / a > < / span > < span class = cF5 > MemCopy< / span > < span class = cF0 > (frame_out-> source_address, frame + MAC_ADDRESS_LENGTH, MAC_ADDRESS_LENGTH);
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< a name = "l44" > < / a >
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< a name = "l45" > < / a > frame_out-> ethertype = frame[ETHERNET_ETHERTYPE_OFFSET + < / span > < span class = cFE > 1< / span > < span class = cF0 > ] | frame[ETHERNET_ETHERTYPE_OFFSET] < < < / span > < span class = cFE > 8< / span > < span class = cF0 > ;
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< a name = "l46" > < / a >
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< a name = "l47" > < / a > frame_out-> data = frame + ETHERNET_DATA_OFFSET;
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< a name = "l48" > < / a >
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< a name = "l49" > < / a > frame_out-> length = length - ETHERNET_MAC_HEADER_LENGTH - < / span > < span class = cFE > 4< / span > < span class = cF0 > ; < / span > < span class = cF2 > // He has a comment literally just saying " ??" . + or - 4?< / span > < span class = cF0 >
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< a name = "l50" > < / a > }
< a name = "l51" > < / a >
< a name = "l52" > < / a > EthernetGlobalsInit;< / span > < / pre > < / body >
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