Hi,
After download 3.6.1 and compile,I find that lftp reports wrong ip
address number.If the ftp server has n ip(s),lftp reports 3*n addresses
found.
lftp :~> open 127.0.0.1
---- Resolving host address...
---- 3 addresses found
lftp 127.0.0.1:~> ls
---- Connecting to 127.0.0.1 (127.0.0.1) port 21
**** Socket error (Connection refused) - reconnecting
---- Connecting to 127.0.0.1 (127.0.0.1) port 21
**** Socket error (Connection refused) - reconnecting
---- Connecting to 127.0.0.1 (127.0.0.1) port 21
**** Socket error (Connection refused) - reconnecting
Interrupt
lftp 127.0.0.1:~> open download.fedora.redhat.com
---- Resolving host address...
---- 6 addresses found
lftp download.fedora.redhat.com:~>
Sometimes I may be banned because I connect to the server 3 times with
no interval.In Resolver.cc:685,getaddrinfo() get 3 same addresses of
"127.0.0.1" with different ai_socktype and ai_protocol,then the 3 same
"127.0.0.1" are all added by AddAddress() in Resolver.cc:714.
# LC_ALL=c gdb --args ./lftp 127.0.0.1
GNU gdb Red Hat Linux (6.6-42.fc8rh)
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you
are
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details.
This GDB was configured as "i386-redhat-linux-gnu"...
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) set follow-fork-mode child
(gdb) br Resolver.cc:685
Breakpoint 1 at 0x80f5edb: file Resolver.cc, line 685.
(gdb) r
Starting program: /root/361/bin/lftp 127.0.0.1
---- Resolving host address...
[Switching to process 3079]
Breakpoint 1, Resolver::LookupOne (this=0x8c034a0,
name=0x8c029b0 "127.0.0.1") at Resolver.cc:685
685 ainfo_res = getaddrinfo(name, NULL, &a_hint, &ainfo);
(gdb) p ainfo
$1 = (addrinfo *) 0x0
(gdb) n
687 if(ainfo_res == 0)
(gdb) p *ainfo
$2 = {ai_flags = 1, ai_family = 2, ai_socktype = 1,
ai_protocol = 6, ai_addrlen = 16, ai_addr = 0x8c01850,
ai_canonname = 0x0, ai_next = 0x8c01868}
(gdb) p/x *ainfo.ai_addr
$3 = {sa_family = 0x2, sa_data = {0x0, 0x0, 0x7f, 0x0, 0x0, 0x1,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}
(gdb) p *ainfo.ai_next
$4 = {ai_flags = 1, ai_family = 2, ai_socktype = 2,
ai_protocol = 17, ai_addrlen = 16, ai_addr = 0x8c01888,
ai_canonname = 0x0, ai_next = 0x8c018a0}
(gdb) p/x *ainfo.ai_next.ai_addr
$5 = {sa_family = 0x2, sa_data = {0x0, 0x0, 0x7f, 0x0, 0x0, 0x1,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}
(gdb) p *ainfo.ai_next.ai_next
$6 = {ai_flags = 1, ai_family = 2, ai_socktype = 3,
ai_protocol = 0, ai_addrlen = 16, ai_addr = 0x8c018c0,
ai_canonname = 0x0, ai_next = 0x0}
(gdb) p/x *ainfo.ai_next.ai_next.ai_addr
$7 = {sa_family = 0x2, sa_data = {0x0, 0x0, 0x7f, 0x0, 0x0, 0x1,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}
(gdb)
In lftp ai_socktype is not set,but in wget 1.11 ai_socktype is set to be
SOCK_STREAM in host.c:724.
724 hints.ai_socktype = SOCK_STREAM;
If in Resolver::LookupOne() ai_socktype is set to be SOCK_STREAM before
getaddrinfo(),then getaddrinfo() get only 1 address of "127.0.0.1".
(gdb) p *ainfo
$2 = {ai_flags = 1, ai_family = 2, ai_socktype = 1,
ai_protocol = 6, ai_addrlen = 16, ai_addr = 0x84bdf48,
ai_canonname = 0x0, ai_next = 0x0}
(gdb) p/x *ainfo.ai_addr
$3 = {sa_family = 0x2, sa_data = {0x0, 0x0, 0x7f, 0x0, 0x0, 0x1,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}
