Hi, I am in need of setting up an IPV4 tunnel over IPv6 in gif between a 6.3-current and a 6.2 router. Only I'm not able to establish the tunnel. In revision 1.109 of /sys/net/if_gif.c there went a change that changed the next header (protocol) to IPPROTO_GRE (protocol 47?) and that's what I'm observing on the 6.2 box is that it doesn't recognize the GRE becuase it might be expecting IPENCAP (protocol 4?).
Am I forced to bring the 6.2 box to 6.3? Or is this a bug that crept in? Inline is a tcpdump: 16:19:27.803168 (authentic,confidential): SPI 0xf24bfe38: fd43:5602:29bd:16:0:de ad:beef:1 > fd43:5602:29bd:16:0:dead:beef:16: fd43:5602:29bd:16:0:dead:beef:1 > fd43:5602:29bd:16:0:dead:beef:16: [R] 5400 sum 0x4e38 off 0x0 (rtaf=0xff01) (rta f=0x2526)[|gre] (len 84, hlim 64) (len 124, hlim 64) 0000: 6000 0000 007c 2940 fd43 5602 29bd 0016 `....|)@.CV.)... 0010: 0000 dead beef 0001 fd43 5602 29bd 0016 .........CV.)... 0020: 0000 dead beef 0016 6000 0000 0054 2f40 ........`....T/@ 0030: fd43 5602 29bd 0016 0000 dead beef 0001 .CV.)........... 0040: fd43 5602 29bd 0016 0000 dead beef 0016 .CV.)........... 0050: 4500 0054 4e38 0000 ff01 f535 ac10 100a E..TN8.....5.... 0060: ac10 1010 0800 8cc6 a056 0000 fec7 b8c0 .........V...... 0070: 72b7 f575 4327 4fda 71dd 45a5 ff30 7ec4 r..uC'O.q.E..0~. 0080: 1315 5d1b 1819 1a1b 1c1d 1e1f 2021 2223 ..]......... !"# 0090: 2425 2627 2829 2a2b 2c2d 2e2f 3031 3233 $%&'()*+,-./0123 00a0: 3435 3637 4567 16:19:27.803207 (authentic,confidential): SPI 0x0f8c22de: fd43:5602:29bd:16:0:de ad:beef:16 > fd43:5602:29bd:16:0:dead:beef:1: fd43:5602:29bd:16:0:dead:beef:16 > fd43:5602:29bd:16:0:dead:beef:1: icmp6: parameter problem next header - octet 6 [icmp6 cksum ok] (len 132, hlim 64) (len 172, hlim 64) 0000: 6000 0000 00ac 2940 fd43 5602 29bd 0016 `.....)@.CV.)... 0010: 0000 dead beef 0016 fd43 5602 29bd 0016 .........CV.)... 0020: 0000 dead beef 0001 6000 0000 0084 3a40 ........`.....:@ 0030: fd43 5602 29bd 0016 0000 dead beef 0016 .CV.)........... 0040: fd43 5602 29bd 0016 0000 dead beef 0001 .CV.)........... 0050: 0401 009c 0000 0006 6000 0000 0054 2f40 ........`....T/@ 0060: fd43 5602 29bd 0016 0000 dead beef 0001 .CV.)........... 0070: fd43 5602 29bd 0016 0000 dead beef 0016 .CV.)........... 0080: 4500 0054 4e38 0000 ff01 f535 ac10 100a E..TN8.....5.... 0090: ac10 1010 0800 8cc6 a056 0000 fec7 b8c0 .........V...... 00a0: 72b7 f575 4327 4fda 71dd 45a5 ff30 7ec4 r..uC'O.q.E..0~. 00b0: 1315 5d1b 1819 1a1b 1c1d 1e1f 2021 2223 ..]......... !"# 00c0: 2425 2627 2829 2a2b 2c2d 2e2f 3031 3233 $%&'()*+,-./0123 00d0: 3435 3637 4567 Regards, -peter
