Hallo,
a QMAIL user reported problems with the IPv6 stack and QMAIL 1.03:
System:
- LINUX SUSE 6.4 (Kernel 2.2.15 and glibc 2.1.3)
- IPv6 enabled
- xinetd with IPv6 options (call to tcp-env and qmail-smtpd)
- QMAIL 1.03 with my SPAMCONTROL patch
Symptom:
- TCPREMOTE does not return correct IPv4 address
Affected QMAIL routines:
- tcpenv.c
- dns.c
Both routines use <netinet/in.h> function "ntohs" which returns the IPv4
mapped IPv6 address (ff:IPv4).
Thus, it seems that we have to modify dns.c and tcp-env.c (and other
routines from tcpserver) to cope with IPv4 mapped IPv6 addresses.
After disabling the IPv4 option, everything works as expected.
cheers.
eh.
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