I got my dev environment working (limping) again.
I built a pptpd with symbols and statically linked.
It was crashing in libwrap.
I added the line "pptpd: ALL" to /etc/hosts.allow and now it works.
My libwrap hosts.deny is the default, libwrap should obviously not
be crashing. Unfortunately I didn't compile uClibc and libwrap with
symbols so I don't know what libwrap screwed up (or uClibc):
Core was generated by `./pptpd --fg'.
Program terminated with signal 11, Segmentation fault.
#0 0x0805207d in inet_pton ()
(gdb) where
#0 0x0805207d in inet_pton ()
#1 0x08052452 in getaddrinfo ()
#2 0x0804bb70 in sock_hostname (host=0xbffff880) at socket.c:265
#3 0x0804b560 in eval_hostname (host=0xbffff880) at eval.c:77
#4 0x0804a402 in host_match (tok=0xbfffee85 "PARANOID", host=0xbffff880)
at hosts_access.c:316
#5 0x0804a108 in list_match (list=0xbfffee84 " PARANOID", request=0xbffff770,
match_fn=0x804a1e5 <client_match>) at hosts_access.c:217
#6 0x0804a005 in table_match (table=0xbfffee84 " PARANOID",
request=0xbffff770) at hosts_access.c:173
#7 0x08049f0a in hosts_access (request=0xbffff770) at hosts_access.c:133
#8 0x0804968d in pptp_manager (argc=2, argv=0xbffffdf4) at pptpmanager.c:219
#9 0x08048745 in main (argc=2, argv=0xbffffdf4) at pptpd.c:420
(gdb) up
#1 0x08052452 in getaddrinfo ()
(gdb) up
#2 0x0804bb70 in sock_hostname (host=0xbffff880) at socket.c:265
265 if (getaddrinfo(host->name, NULL, &hints, &res0) != 0) {
(gdb) print host->name
$1 = "protempore.shockwave.org", '\0' <repeats 103 times>
(gdb) print hints
$1 = {ai_flags = 3, ai_family = 2, ai_socktype = 1, ai_protocol = 0,
ai_addrlen = 0, ai_addr = 0x0, ai_canonname = 0x0, ai_next = 0x0}
(gdb) print res0
$2 = (struct addrinfo *) 0x0
(gdb) quit
The arguments being passed into getaddrinfo look, at first glance, to
be reasonable. I looked over the hints getting passed in, they look good.
There may be a generic problem dealing with ALL: PARANOID, this is the
first time I've ever actually violated a libwrap directive since my
firewall usually protects everything.
Worst case, I'll need to rebuild uclibc with symbols, but I'm not looking
forward to that, my dev environment is quite shakey thanks to compiler
mismatches. I was hoping to not do any more leaf development until the
upgrade to gcc-4.0 and a recent uclibc.
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