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Diffstat (limited to 'networking/udhcp/Config.in')
| -rw-r--r-- | networking/udhcp/Config.in | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/networking/udhcp/Config.in b/networking/udhcp/Config.in index 734db65..1aef69b 100644 --- a/networking/udhcp/Config.in +++ b/networking/udhcp/Config.in @@ -82,3 +82,25 @@ config FEATURE_RFC3397 help If selected, both client and server will support passing of domain search lists via option 119, specified in RFC3397. + +config UDHCPC_SLACK_FOR_BUGGY_SERVERS + int "DHCP options slack buffer size" + default 80 + range 0 924 + depends on APP_UDHCPD || APP_UDHCPC + help + Some buggy DHCP servers will send DHCP offer packets with option + field larger than we expect (which might also be considered a + buffer overflow attempt). These packets are normally discarded. + If circumstances beyond your control force you to support such + servers, this may help. The upper limit (924) makes dhcpc accept + even 1500 byte packets (maximum-sized ethernet packets). + + This options does not make dhcp[cd] emit non-standard + sized packets. + + Known buggy DHCP servers: + 3Com OfficeConnect Remote 812 ADSL Router: + seems to confuse maximum allowed UDP packet size with + maximum size of entire IP packet, and sends packets which are + 28 bytes too large. |