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ip/tinc: accept udp connection from any udp source port

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the remote host might be behind a NAT which translates the
source port, so if no host could be found, lookup the ip
address only.
This commit is contained in:
cinap_lenrek 2020-05-23 23:31:11 +02:00
parent ec737b6a2e
commit a54804ed24
1 changed files with 6 additions and 2 deletions
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8
sys/src/cmd/ip/tinc.c
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@ -1440,12 +1440,16 @@ udpclient(int fd, int incoming)
{
uchar ip[IPaddrlen];
char dir[128];
int port;
Host *h;
h = findhost(ip, dir2ipport(fd2dir(fd, dir, sizeof(dir)), ip));
port = dir2ipport(fd2dir(fd, dir, sizeof(dir)), ip);
h = findhost(ip, port);
if(h == nil && incoming)
h = findhost(ip, -1); /* might be behind NAT */
if(h != nil && h != myhost){
procsetname("udpclient %s %s %s %I!%d %s", myhost->name,
incoming ? "in": "out", dir, h->ip, h->port, h->name);
incoming ? "in": "out", dir, ip, port, h->name);
if(!incoming){
lock(h->cin);