Package: ppp Version: 2.4.7-2+4.1+deb10u1 Control: subscribe -1 Hello!
pppoe-discovery with -U option (Use Host-Unique to allow multiple PPPoE sessions) is in Debian Buster currently broken. Its output on PPPoE network via eth0 interface is just: # pppoe-discovery -U -I eth0 Timeout waiting for PADO packets But tcpdump on eth0 interface confirms that PADO packets were received: # tcpdump -n -p -vvvv -i eth0 tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes ... 21:04:23.835174 PPPoE PADI [Service-Name] [Host-Uniq 0x0DCC] 21:04:23.853135 PPPoE PADO [Service-Name] [AC-Name "ke-pols-bras-1"] [Host-Uniq 0x0DCC] [AC-Cookie 0x37591CD0FA31C63720E0CF08D4340C61] 21:04:23.853396 PPPoE PADO [Service-Name] [AC-Name "po-maue-bras-1"] [Host-Uniq 0x0DCC] [AC-Cookie 0xEC3CB571EEF00E875E46F71059CA58F9] 21:04:26.853685 PPPoE PADO [Service-Name] [AC-Name "ba-jros-bras-3"] [Host-Uniq 0x0DCC] [AC-Cookie 0x7D802A631A6DC4F1F3C70737DA71678A] 21:04:31.858854 PPPoE PADI [Service-Name] [Host-Uniq 0x0DCC] 21:04:31.868204 PPPoE PADO [Service-Name] [AC-Name "ke-pols-bras-1"] [Host-Uniq 0x0DCC] [AC-Cookie 0x37591CD0FA31C63720E0CF08D4340C61] 21:04:31.868358 PPPoE PADO [Service-Name] [AC-Name "po-maue-bras-1"] [Host-Uniq 0x0DCC] [AC-Cookie 0xEC3CB571EEF00E875E46F71059CA58F9] 21:04:34.948714 PPPoE PADO [Service-Name] [AC-Name "ba-jros-bras-3"] [Host-Uniq 0x0DCC] [AC-Cookie 0x7D802A631A6DC4F1F3C70737DA71678A] 21:04:39.953858 PPPoE PADI [Service-Name] [Host-Uniq 0x0DCC] 21:04:39.962591 PPPoE PADO [Service-Name] [AC-Name "ke-pols-bras-1"] [Host-Uniq 0x0DCC] [AC-Cookie 0x37591CD0FA31C63720E0CF08D4340C61] 21:04:39.962649 PPPoE PADO [Service-Name] [AC-Name "po-maue-bras-1"] [Host-Uniq 0x0DCC] [AC-Cookie 0xEC3CB571EEF00E875E46F71059CA58F9] 21:04:43.048720 PPPoE PADO [Service-Name] [AC-Name "ba-jros-bras-3"] [Host-Uniq 0x0DCC] [AC-Cookie 0x7D802A631A6DC4F1F3C70737DA71678A] ... Without -U option pppoe-discovery is working fine: # pppoe-discovery -I eth0 Access-Concentrator: ke-pols-bras-1 Got a cookie: 37 59 1c d0 fa 31 c6 37 20 e0 cf 08 d4 34 0c 61 -------------------------------------------------- AC-Ethernet-Address: 24:21:24:e9:be:3f Access-Concentrator: po-maue-bras-1 Got a cookie: ec 3c b5 71 ee f0 0e 87 5e 46 f7 10 59 ca 58 f9 -------------------------------------------------- AC-Ethernet-Address: 20:e0:9c:3e:98:01 Access-Concentrator: ba-jros-bras-3 Got a cookie: 7d 80 2a 63 1a 6d c4 f1 f3 c7 07 37 da 71 67 8a -------------------------------------------------- AC-Ethernet-Address: 24:21:24:b9:76:3f It looks like that ppp package in Debian Buster has custom patch which implements -U option [1] which differs from upstream implementation of -U option [2] [3]. I compiled pppoe-discovery from upstream ppp project with upstream -U patch [3] and this is working fine. Output is: # ./pppd/plugins/rp-pppoe/pppoe-discovery -U -I eth0 Access-Concentrator: ke-pols-bras-1 Got a cookie: 37 59 1c d0 fa 31 c6 37 20 e0 cf 08 d4 34 0c 61 AC-Ethernet-Address: 24:21:24:e9:be:3f -------------------------------------------------- Access-Concentrator: po-maue-bras-1 Got a cookie: ec 3c b5 71 ee f0 0e 87 5e 46 f7 10 59 ca 58 f9 AC-Ethernet-Address: 20:e0:9c:3e:98:01 -------------------------------------------------- Access-Concentrator: ba-jros-bras-3 Got a cookie: 7d 80 2a 63 1a 6d c4 f1 f3 c7 07 37 da 71 67 8a AC-Ethernet-Address: 24:21:24:b9:76:3f -------------------------------------------------- So it means that Debian's custom patch in Buster [1] is broken. Please replace this broken Debian patch by working upstream patch [3]. To make pppoe-discovery from ppp package in Debian working. [1] - https://sources.debian.org/patches/ppp/2.4.7-2+4.1+deb10u1/pr-28-pppoe-custom-host-uniq-tag.patch/ [2] - https://github.com/paulusmack/ppp/pull/97 [3] - https://github.com/paulusmack/ppp/commit/c9d9dbfb8459b528ab56bd1cf0c41460801bbfdf -- Pali Rohár pali.ro...@gmail.com
