Realmente preso nisso, quero mudar o gateway do meu pc para passar pelo meu telefone conectado à mesma rede wifi da minha casa. Quando o ponto de acesso está ativado e eu me conecto a ele com outro dispositivo, ele funciona conforme o esperado. Quando eu desativo o hotspot e mudo o gateway do meu PC para o telefone e habilito o encaminhamento dos contadores na tabela FORWARD do iptables, não mude.
Eu habilitei todo o encaminhamento de porta que o hotspot usa, veja a saída do sysctl abaixo
O IP do PC é 192.168.0.57
O telefone/tablet pelo qual estou tentando me conectar é um Samsung Galaxy TAB A6 atualmente executando o lineage custom rom Android 9 também não teve sucesso com a imagem de estoque 8.1
Executar o ping 8.8.8.8 no PC fornece estes resultados:
A resposta do tcpdump quando o hotspot está ativado
06:55:33.500227 IP 19.18.39.197 > dns.google: ICMP echo request, id 21730, seq 1, length 64
06:55:33.528039 IP dns.google > 19.18.39.197: ICMP echo reply, id 21730, seq 1, length 64
06:55:34.578520 IP 19.18.39.197 > dns.google: ICMP echo request, id 21731, seq 1, length 64
06:55:34.603065 IP dns.google > 19.18.39.197: ICMP echo reply, id 21731, seq 1, length 64
06:55:35.717137 IP 19.18.39.197 > dns.google: ICMP echo request, id 21732, seq 1, length 64
06:55:35.763043 IP dns.google > 19.18.39.197: ICMP echo reply, id 21732, seq 1, length 64
A resposta do tcpdump sem o hotspot
06:58:16.566254 IP 19.18.39.197 > 192.168.0.57: ICMP net cache2.service.virginmedia.net unreachable,
length 68
O que continua repetindo
ifconfig and ip r:
:/ # ip r
19.0.0.0/8 dev rmnet1 proto kernel scope link src 19.18.39.197
192.168.0.0/24 dev wlan0 proto kernel scope link src 192.168.0.50
:/ # ifconfig
wlan0 Link encap:Ethernet HWaddr 08:78:08:ac:fc:04 Driver ar6k_wlan
inet addr:192.168.0.50 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::a78:8ff:feac:fc04/64 Scope: Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5876 errors:0 dropped:0 overruns:0 frame:0
TX packets:3845 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3000
RX bytes:935863 TX bytes:580125
rmnet1 Link encap:Point-to-Point Protocol
inet addr:19.18.39.197 P-t-P:19.18.39.197 Mask:255.0.0.0
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:3351 errors:0 dropped:0 overruns:0 frame:0
TX packets:3383 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1564260 TX bytes:1053730
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope: Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:5435 errors:0 dropped:0 overruns:0 frame:0
TX packets:5435 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:869529 TX bytes:869529
iptables - Nada muda na cadeia de encaminhamento com o hotspot desativado
:/ # iptables -vnL
Chain INPUT (policy ACCEPT 6542 packets, 1282K bytes)
pkts bytes target prot opt in out source destination
Chain FORWARD (policy ACCEPT 1666 packets, 346K bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 6514 packets, 925K bytes)
pkts bytes target prot opt in out source destination
:/ # iptables -t nat -vnL
Chain PREROUTING (policy ACCEPT 3072 packets, 203K bytes)
pkts bytes target prot opt in out source destination
Chain INPUT (policy ACCEPT 2074 packets, 126K bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 199 packets, 13593 bytes)
pkts bytes target prot opt in out source destination
Chain POSTROUTING (policy ACCEPT 62 packets, 4337 bytes)
pkts bytes target prot opt in out source destination
710 58824 MASQUERADE all -- * rmnet1 0.0.0.0/0 0.0.0.0/0
Sysctl (eles são desativados quando você desativa o ponto de acesso e eu os reativo)
:/ # sysctl -a |grep forward
net.ipv4.conf.all.forwarding = 1
net.ipv4.conf.all.mc_forwarding = 0
net.ipv4.conf.default.forwarding = 1
net.ipv4.conf.default.mc_forwarding = 0
net.ipv4.conf.ip6tnl0.forwarding = 1
net.ipv4.conf.ip6tnl0.mc_forwarding = 0
net.ipv4.conf.lo.forwarding = 1
net.ipv4.conf.lo.mc_forwarding = 0
net.ipv4.conf.rmnet0.forwarding = 1
net.ipv4.conf.rmnet0.mc_forwarding = 0
net.ipv4.conf.rmnet1.forwarding = 1
net.ipv4.conf.rmnet1.mc_forwarding = 0
net.ipv4.conf.rmnet2.forwarding = 1
net.ipv4.conf.rmnet2.mc_forwarding = 0
net.ipv4.conf.rmnet3.forwarding = 1
net.ipv4.conf.rmnet3.mc_forwarding = 0
net.ipv4.conf.rmnet4.forwarding = 1
net.ipv4.conf.rmnet4.mc_forwarding = 0
net.ipv4.conf.rmnet5.forwarding = 1
net.ipv4.conf.rmnet5.mc_forwarding = 0
net.ipv4.conf.rmnet6.forwarding = 1
net.ipv4.conf.rmnet6.mc_forwarding = 0
net.ipv4.conf.rmnet7.forwarding = 1
net.ipv4.conf.rmnet7.mc_forwarding = 0
net.ipv4.conf.sit0.forwarding = 1
net.ipv4.conf.sit0.mc_forwarding = 0
net.ipv4.conf.umts_dm0.forwarding = 1
net.ipv4.conf.umts_dm0.mc_forwarding = 0
net.ipv4.conf.wlan0.forwarding = 1
net.ipv4.conf.wlan0.mc_forwarding = 0
net.ipv4.ip_forward = 1
net.ipv4.ip_forward_use_pmtu = 0
sysctl: key 'net.ipv4.route.flush': Permission denied
net.ipv6.conf.all.forwarding = 1
net.ipv6.conf.default.forwarding = 1
net.ipv6.conf.ip6tnl0.forwarding = 1
net.ipv6.conf.lo.forwarding = 1
net.ipv6.conf.rmnet0.forwarding = 1
net.ipv6.conf.rmnet1.forwarding = 1
net.ipv6.conf.rmnet2.forwarding = 1
net.ipv6.conf.rmnet3.forwarding = 1
net.ipv6.conf.rmnet4.forwarding = 1
net.ipv6.conf.rmnet5.forwarding = 1
net.ipv6.conf.rmnet6.forwarding = 1
net.ipv6.conf.rmnet7.forwarding = 1
net.ipv6.conf.sit0.forwarding = 1
net.ipv6.conf.umts_dm0.forwarding = 1
net.ipv6.conf.wlan0.forwarding = 1
Parece que o ponto de acesso está mudando uma opção que não conheço quando é ativada e que permite o encaminhamento, esperando que alguém tenha uma ideia?
EDITAR
Graças à ajuda da AB esse problema ocorreu devido às regras de IP criadas pelo Android quando o hotspot estava ligado e eu não estava replicando quando o hotspot estava desligado.
Conforme solicitado aqui estão as tabelas primeiro com o hotspot desligado
:/ # ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: umts_dm0: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ppp
3: rmnet0: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ppp
4: rmnet1: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN mode DEFAULT group default qlen 1000
link/ppp
5: rmnet2: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ppp
6: rmnet3: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ppp
7: rmnet4: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ppp
8: rmnet5: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ppp
9: rmnet6: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ppp
10: rmnet7: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ppp
11: sit0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN mode DEFAULT group default
link/sit 0.0.0.0 brd 0.0.0.0
12: ip6tnl0@NONE: <NOARP> mtu 1452 qdisc noop state DOWN mode DEFAULT group default
link/tunnel6 :: brd ::
13: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DORMANT group default qlen 3000
link/ether 08:78:08:ac:fc:04 brd ff:ff:ff:ff:ff:ff
14: p2p0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 3000
link/ether 0a:78:08:ac:fc:04 brd ff:ff:ff:ff:ff:ff
1|:/ # ip address
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: umts_dm0: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ppp
3: rmnet0: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ppp
4: rmnet1: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
link/ppp
inet 19.18.242.148/8 scope global rmnet1
valid_lft forever preferred_lft forever
5: rmnet2: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ppp
6: rmnet3: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ppp
7: rmnet4: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ppp
8: rmnet5: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ppp
9: rmnet6: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ppp
10: rmnet7: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ppp
11: sit0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN group default
link/sit 0.0.0.0 brd 0.0.0.0
12: ip6tnl0@NONE: <NOARP> mtu 1452 qdisc noop state DOWN group default
link/tunnel6 :: brd ::
13: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 3000
link/ether 08:78:08:ac:fc:04 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.50/24 brd 192.168.0.255 scope global wlan0
valid_lft forever preferred_lft forever
inet6 fe80::a78:8ff:feac:fc04/64 scope link
valid_lft forever preferred_lft forever
14: p2p0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 3000
link/ether 0a:78:08:ac:fc:04 brd ff:ff:ff:ff:ff:ff
130|:/ # ip route
19.0.0.0/8 dev rmnet1 proto kernel scope link src 19.18.242.148
192.168.0.0/24 dev wlan0 proto kernel scope link src 192.168.0.50
:/ # ip rule
0: from all lookup local
10000: from all fwmark 0xc0000/0xd0000 lookup legacy_system
10500: from all iif lo oif wlan0 uidrange 0-0 lookup wlan0
10500: from all iif lo oif rmnet1 uidrange 0-0 lookup rmnet1
13000: from all fwmark 0x10063/0x1ffff iif lo lookup local_network
13000: from all fwmark 0x10065/0x1ffff iif lo lookup wlan0
13000: from all fwmark 0x50064/0x5ffff iif lo lookup rmnet1
14000: from all iif lo oif wlan0 lookup wlan0
14000: from all fwmark 0x40000/0x40000 iif lo oif rmnet1 lookup rmnet1
15000: from all fwmark 0x0/0x10000 lookup legacy_system
16000: from all fwmark 0x0/0x10000 lookup legacy_network
17000: from all fwmark 0x0/0x10000 lookup local_network
19000: from all fwmark 0x65/0x1ffff iif lo lookup wlan0
22000: from all fwmark 0x0/0xffff iif lo lookup wlan0
32000: from all unreachable
:/ #
1|:/ # ip rule show table local
0: from all lookup local
:/ # ip rule show table rmnet1
10500: from all iif lo oif rmnet1 uidrange 0-0 lookup rmnet1
13000: from all fwmark 0x50064/0x5ffff iif lo lookup rmnet1
14000: from all fwmark 0x40000/0x40000 iif lo oif rmnet1 lookup rmnet1
:/ # ip rule show table wlan0
10500: from all iif lo oif wlan0 uidrange 0-0 lookup wlan0
13000: from all fwmark 0x10065/0x1ffff iif lo lookup wlan0
14000: from all iif lo oif wlan0 lookup wlan0
19000: from all fwmark 0x65/0x1ffff iif lo lookup wlan0
22000: from all fwmark 0x0/0xffff iif lo lookup wlan0
:/ # ip rule show table local_network
13000: from all fwmark 0x10063/0x1ffff iif lo lookup local_network
17000: from all fwmark 0x0/0x10000 lookup local_network
:/ # ip rule show table legacy_network
16000: from all fwmark 0x0/0x10000 lookup legacy_network
:/ # ip rule show table legacy_system
10000: from all fwmark 0xc0000/0xd0000 lookup legacy_system
15000: from all fwmark 0x0/0x10000 lookup legacy_system
:/ #
:/ # ip route show table local
broadcast 19.0.0.0 dev rmnet1 proto kernel scope link src 19.18.242.148
local 19.18.242.148 dev rmnet1 proto kernel scope host src 19.18.242.148
broadcast 19.255.255.255 dev rmnet1 proto kernel scope link src 19.18.242.148
broadcast 127.0.0.0 dev lo proto kernel scope link src 127.0.0.1
local 127.0.0.0/8 dev lo proto kernel scope host src 127.0.0.1
local 127.0.0.1 dev lo proto kernel scope host src 127.0.0.1
broadcast 127.255.255.255 dev lo proto kernel scope link src 127.0.0.1
broadcast 192.168.0.0 dev wlan0 proto kernel scope link src 192.168.0.50
local 192.168.0.50 dev wlan0 proto kernel scope host src 192.168.0.50
broadcast 192.168.0.255 dev wlan0 proto kernel scope link src 192.168.0.50
:/ # ip route show table rmnet1
default via 19.18.242.1 dev rmnet1 proto static
19.18.242.1 dev rmnet1 proto static scope link
19.18.242.148 dev rmnet1 proto static scope link
:/ # ip route show table wlan0
default via 192.168.0.1 dev wlan0 proto static
192.168.0.0/24 dev wlan0 proto static scope link
:/ # ip route show table local_network
:/ # ip route show table legacy_network
:/ # ip route show table legacy_system
:/ #
E com o ponto de acesso ativado
:/ # ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: umts_dm0: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ppp
3: rmnet0: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 1000
link/ppp
4: rmnet1: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN mode DEFAULT group default qlen 1000
link/ppp
5: rmnet2: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ppp
6: rmnet3: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ppp
7: rmnet4: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ppp
8: rmnet5: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ppp
9: rmnet6: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ppp
10: rmnet7: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ppp
11: sit0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN mode DEFAULT group default
link/sit 0.0.0.0 brd 0.0.0.0
12: ip6tnl0@NONE: <NOARP> mtu 1452 qdisc noop state DOWN mode DEFAULT group default
link/tunnel6 :: brd ::
13: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 3000
link/ether 08:78:08:ac:fc:04 brd ff:ff:ff:ff:ff:ff
:/ #
:/ # ip address
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: umts_dm0: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ppp
3: rmnet0: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
link/ppp
4: rmnet1: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
link/ppp
inet 19.18.242.148/8 scope global rmnet1
valid_lft forever preferred_lft forever
5: rmnet2: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ppp
6: rmnet3: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ppp
7: rmnet4: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ppp
8: rmnet5: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ppp
9: rmnet6: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ppp
10: rmnet7: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ppp
11: sit0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN group default
link/sit 0.0.0.0 brd 0.0.0.0
12: ip6tnl0@NONE: <NOARP> mtu 1452 qdisc noop state DOWN group default
link/tunnel6 :: brd ::
13: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 3000
link/ether 08:78:08:ac:fc:04 brd ff:ff:ff:ff:ff:ff
inet 192.168.43.241/24 brd 192.168.43.255 scope global wlan0
valid_lft forever preferred_lft forever
inet6 fe80::a78:8ff:feac:fc04/64 scope link
valid_lft forever preferred_lft forever
:/ #
:/ # ip route
19.0.0.0/8 dev rmnet1 proto kernel scope link src 19.18.242.148
192.168.43.0/24 dev wlan0 proto kernel scope link src 192.168.43.241
:/ # ip rule
0: from all lookup local
10000: from all fwmark 0xc0000/0xd0000 lookup legacy_system
10500: from all iif lo oif rmnet1 uidrange 0-0 lookup rmnet1
10500: from all iif lo oif wlan0 uidrange 0-0 lookup local_network
13000: from all fwmark 0x10063/0x1ffff iif lo lookup local_network
13000: from all fwmark 0x10064/0x1ffff iif lo lookup rmnet1
14000: from all iif lo oif rmnet1 lookup rmnet1
14000: from all iif lo oif wlan0 lookup local_network
15000: from all fwmark 0x0/0x10000 lookup legacy_system
16000: from all fwmark 0x0/0x10000 lookup legacy_network
17000: from all fwmark 0x0/0x10000 lookup local_network
18000: from all iif wlan0 lookup rmnet1
19000: from all fwmark 0x64/0x1ffff iif lo lookup rmnet1
22000: from all fwmark 0x0/0xffff iif lo lookup rmnet1
32000: from all unreachable
:/ # ip rule show table local
0: from all lookup local
:/ # ip rule show table rmnet1
10500: from all iif lo oif rmnet1 uidrange 0-0 lookup rmnet1
13000: from all fwmark 0x10064/0x1ffff iif lo lookup rmnet1
14000: from all iif lo oif rmnet1 lookup rmnet1
18000: from all iif wlan0 lookup rmnet1
19000: from all fwmark 0x64/0x1ffff iif lo lookup rmnet1
22000: from all fwmark 0x0/0xffff iif lo lookup rmnet1
:/ # ip rule show table wlan0
Error: argument "wlan0" is wrong: table id value is invalid
255|:/ # ip rule show table local_network
10500: from all iif lo oif wlan0 uidrange 0-0 lookup local_network
13000: from all fwmark 0x10063/0x1ffff iif lo lookup local_network
14000: from all iif lo oif wlan0 lookup local_network
17000: from all fwmark 0x0/0x10000 lookup local_network
:/ # ip rule show table legacy_network
16000: from all fwmark 0x0/0x10000 lookup legacy_network
:/ # ip rule show table legacy_system
10000: from all fwmark 0xc0000/0xd0000 lookup legacy_system
15000: from all fwmark 0x0/0x10000 lookup legacy_system
:/ #
:/ # ip route show table local
broadcast 19.0.0.0 dev rmnet1 proto kernel scope link src 19.18.242.148
local 19.18.242.148 dev rmnet1 proto kernel scope host src 19.18.242.148
broadcast 19.255.255.255 dev rmnet1 proto kernel scope link src 19.18.242.148
broadcast 127.0.0.0 dev lo proto kernel scope link src 127.0.0.1
local 127.0.0.0/8 dev lo proto kernel scope host src 127.0.0.1
local 127.0.0.1 dev lo proto kernel scope host src 127.0.0.1
broadcast 127.255.255.255 dev lo proto kernel scope link src 127.0.0.1
broadcast 192.168.43.0 dev wlan0 proto kernel scope link src 192.168.43.241
local 192.168.43.241 dev wlan0 proto kernel scope host src 192.168.43.241
broadcast 192.168.43.255 dev wlan0 proto kernel scope link src 192.168.43.241
:/ # ip route show table rmnet1
default via 19.18.242.1 dev rmnet1 proto static
19.18.242.1 dev rmnet1 proto static scope link
19.18.242.148 dev rmnet1 proto static scope link
:/ # ip route show table wlan0
Error: argument "wlan0" is wrong: table id value is invalid
255|:/ # ip route show table local_network
192.168.43.0/24 dev wlan0 proto static scope link
:/ # ip route show table legacy_network
:/ # ip route show table legacy_system
:/ #
Acho que posso fazer funcionar excluindo tudo e simplificando, mas acho que o Android apenas recriará as regras com uma mudança de rede, então quero resolver a regra que esqueci
EDITAR
Tudo resolvido. O ponto de acesso adiciona roteamento entre as duas interfaces que falta quando o ponto de acesso é desconectado. Só preciso adicionar estas 2 regras de volta:
:/ # ip rule add from all iif rmnet1 lookup wlan0
:/ # ip rule add from all iif wlan0 lookup rmnet1