Bug 8636

Hi,

I have a problem with the wget of busybox 1.23.2.

I have a network device with a mtu problem. When the mtu on ethernet interface is 1500, wget hangs and therefore fails to get the result (if the result is a long length answer). If I set the mtu to 1400, everything goes well.

So, I thought it would be smarter I use the -T/--timeout option of wget in case of network failure. But the option doesn't make a difference. The busybox version of wget hangs with this option too.

I tried with the GNU wget (1.16.3). With the same command, the timeout works well:

---
[...]
HTTP request sent, awaiting response... Read error (Connection timed out) in headers.
Retrying.
---

I used this command:

---
wget -T 10 -O kernel.img http://mywebserver/pub/kernel.img
---

My busybox config:

---
892:CONFIG_WGET=y
893:CONFIG_FEATURE_WGET_STATUSBAR=y
894:CONFIG_FEATURE_WGET_AUTHENTICATION=y
895:CONFIG_FEATURE_WGET_LONG_OPTIONS=y
896:CONFIG_FEATURE_WGET_TIMEOUT=y
---

The strace (I modified the URL and the IP):

---
strace wget -T 10 -O kernel.img http://mywebserver/pub/kernel.img
execve("/usr/bin/wget", ["wget", "-T", "10", "-O", "kernel.img", "http://mywebserver/pub/k"...], [/* 15 vars */]) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x400b6000
open("/lib/libc.so.0", O_RDONLY)        = 3
fstat(3, {st_mode=S_IFREG|0755, st_size=308988, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x400cf000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\20\241\0\0004\0\0\0"..., 4096) = 4096
mmap2(NULL, 360448, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40174000
mmap2(0x40174000, 304484, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x40174000
mmap2(0x401c6000, 4840, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x4a) = 0x401c6000
mmap2(0x401c8000, 14192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x401c8000
close(3)                                = 0
munmap(0x400cf000, 4096)                = 0
stat("/lib/ld-uClibc.so.0", {st_mode=S_IFREG|0755, st_size=25296, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x40067000
set_tls(0x40067480, 0x40067b20, 0x40067b28, 0x40067480, 0x40075f74) = 0
mprotect(0x401c6000, 4096, PROT_READ)   = 0
mprotect(0x40075000, 4096, PROT_READ)   = 0
ioctl(0, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
getuid32()                              = 0
brk(0)                                  = 0xaf000
brk(0xb1000)                            = 0xb1000
open("/etc/services", O_RDONLY)         = 3
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, 0xbeec197c) = -1 ENOTTY (Inappropriate ioctl for device)
brk(0xb2000)                            = 0xb2000
read(3, "# /etc/services:\n# $Id: services"..., 4096) = 4096
close(3)                                = 0
open("/etc/hosts", O_RDONLY)            = 3
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, 0xbeec1394) = -1 ENOTTY (Inappropriate ioctl for device)
read(3, "127.0.0.1\tlocalhost\n127.0.1.1\tmr"..., 4096) = 37
read(3, "", 4096)                       = 0
close(3)                                = 0
stat64("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=40, ...}) = 0
open("/etc/resolv.conf", O_RDONLY)      = 3
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, 0xbeec105c) = -1 ENOTTY (Inappropriate ioctl for device)
read(3, "search syscom.ch\nnameserver 192."..., 4096) = 40
read(3, "", 4096)                       = 0
close(3)                                = 0
socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP) = 3
connect(3, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.4.1")}, 16) = 0
send(3, "\0\2\1\0\0\1\0\0\0\0\0\0\10mywebserver"..., 49, 0) = 49
poll([{fd=3, events=POLLIN}], 1, 5000)  = 1 ([{fd=3, revents=POLLIN}])
recv(3, "\0\2\201\200\0\1\0\1\0\0\0\0\10mywebserver"..., 512, MSG_DONTWAIT) = 65
close(3)                                = 0
brk(0xb3000)                            = 0xb3000
write(2, "Connecting to ", 14Connecting to )          = 14
write(2, "mywebserver", 11mywebserver) = 11
write(2, " (", 2 ()                       = 2
write(2, "10.200.221.201:80", 1710.200.221.201:80)       = 17
write(2, ")\n", 2)
)                      = 2
socket(PF_INET, SOCK_STREAM, IPPROTO_IP) = 3
connect(3, {sa_family=AF_INET, sin_port=htons(80), sin_addr=inet_addr("10.200.221.201")}, 16) = 0
fcntl64(3, F_GETFL)                     = 0x2 (flags O_RDWR)
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, 0xbeec1a14) = -1 ENOTTY (Inappropriate ioctl for device)
write(3, "GET /pub/kernel.img"..., 125) = 125
read(3,
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