joornl
commented
1 year ago Inserting patch as code above didn't seem to work. So, pasting patch as text.
--- hal/ethernet/bsd/ethernet_bsd.c 2022-12-12 21:22:12.390609000 +0000 +++ hal/ethernet/bsd/ethernet_bsd.c.orig 2022-03-11 18:15:52.000000000 +0000 @@ -212,10 +212,47 @@ int optval; struct bpf_insn destAddrFiltCode[] = {
- BPF_STMT(BPF_LD+BPF_B+BPF_ABS, 12),
- BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, 0X8100, 0, 1),
- BPF_STMT(BPF_RET+BPF_K, 1),
- BPF_STMT(BPF_RET+BPF_K, 0)
- / Load 0 into accumulator. Change to 1 to enable ethernet address filter. /
- {0x00, 0, 0, 0x00000000}, / A0: ld #0 /
- {0x15, 4, 0, 0x00000000}, / jeq #0, P0, A1 /
- / Load 4 bytes starting at offest 2 into the accu and compare it with 4 bytes of the destination address. /
- {0x20, 0, 0, 0x00000002}, / A1: ld [2] /
- {0x15, 0, 7, 0x00000000}, / jeq #0, A2, KO /
- / Load 2 bytes starting at offest 0 into the accu and compare it with 2 bytes of the destination address. /
- {0x28, 0, 0, 0x00000000}, / A2: ldh [0] /
- {0x15, 0, 5, 0x00000000}, / jeq #0, P0, KO /
- / Load 0 into accumulator. Change to 1 to enable ethernet protocol filter. /
- {0x00, 0, 0, 0x00000000}, / P0: ld #0 /
- {0x15, 2, 0, 0x00000000}, / jeq #0, OK, P1 /
- / Load 2 bytes starting at offset 12 into the accu and compare it with the given ethertype. /
- {0x28, 0, 0, 0x0000000c}, / P1: ldh [12] /
- {0x15, 0, 1, 0x00000000}, / jeq #0, OK, KO /
- / Accept packet. /
- {0x6, 0, 0, 0x0000ffff}, / OK: ret #65535 /
- / Drop packet. /
- {0x6, 0, 0, 0x00000000} / KO: ret #0 /
- /* The whole BPF VM assembler program compiled with bpfc into the machine code above:
- *
-
- A0: ld #0
-
- jeq #0, P0, A1
-
- A1: ld [2]
-
- jeq #0, A2, KO
-
- A2: ldh [0]
-
- jeq #0, P0, KO
-
- P0: ld #0
-
- jeq #0, OK, P1
-
- P1: ldh [12]
-
- jeq #0, OK, KO
-
- OK: ret #65535
-
- KO: ret #0
-
*/ };
EthernetSocket self = GLOBAL_CALLOC(1, sizeof(struct sEthernetSocket));
The sv_subscriber example does not work on FreeBSD. It does not print anything. The problem was traced to hal/ethernet/bsd/ethernet_bsd.c
The patch to make it work is: `--- hal/ethernet/bsd/ethernet_bsd.c 2022-12-12 21:22:12.390609000 +0000 +++ hal/ethernet/bsd/ethernet_bsd.c.orig 2022-03-11 18:15:52.000000000 +0000 @@ -212,10 +212,47 @@ int optval; struct bpf_insn destAddrFiltCode[] = {
*/ };
EthernetSocket self = GLOBAL_CALLOC(1, sizeof(struct sEthernetSocket));
`