diff options
author | dzwdz | 2022-08-21 22:33:09 +0200 |
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committer | dzwdz | 2022-08-21 22:33:09 +0200 |
commit | e35d6a4fde9a0671bc7d2527ff6b55b0ce1b4b1e (patch) | |
tree | beb45a1ea334c18a29297684c009e9fb479bebeb /src/user/app/ethdump/arp.c | |
parent | dc5098f83ac55722744a97d2950f50ef2a221f1a (diff) |
user: rename ethdump to netstack
Diffstat (limited to 'src/user/app/ethdump/arp.c')
-rw-r--r-- | src/user/app/ethdump/arp.c | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/src/user/app/ethdump/arp.c b/src/user/app/ethdump/arp.c deleted file mode 100644 index cfb1e04..0000000 --- a/src/user/app/ethdump/arp.c +++ /dev/null @@ -1,48 +0,0 @@ -#include "proto.h" -#include "util.h" -#include <string.h> - -enum { - HdrType = 0, - HdrTypeEther = 1, - ProtoType = 2, - HdrALen = 4, - ProtoALen = 5, - Operation = 6, - OpReq = 1, - OpReply = 2, -}; - -void arp_parse(const uint8_t *buf, size_t len) { - // TODO no bound checks - uint16_t htype = nget16(buf + HdrType); - uint16_t ptype = nget16(buf + ProtoType); - uint16_t op = nget16(buf + Operation); - - if (!(htype == HdrTypeEther && ptype == ET_IPv4)) return; - enum { /* only valid for this combination of header + proto */ - SrcMAC = 8, - SrcIP = 14, - DstMAC = 18, - DstIP = 24, - }; - - if (op == OpReq) { - uint32_t daddr = nget32(buf + DstIP); - if (daddr == state.ip) { - uint8_t *pkt = ether_start(30, (struct ethernet){ - .dst = buf + SrcMAC, - .type = ET_ARP, - }); - nput16(pkt + HdrType, 1); - nput16(pkt + ProtoType, ET_IPv4); - pkt[HdrALen] = 6; - pkt[ProtoALen] = 4; - nput16(pkt + Operation, OpReply); - memcpy(pkt + SrcMAC, state.mac, 6); - nput32(pkt + SrcIP, state.ip); - memcpy(pkt + DstMAC, buf + SrcMAC, 10); /* sender's MAC and IP */ - ether_finish(pkt); - } - } -} |