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| author | Guy Harris <guy@alum.mit.edu> | 2017-01-20 01:44:06 -0800 |
|---|---|---|
| committer | Guy Harris <guy@alum.mit.edu> | 2017-01-20 01:44:06 -0800 |
| commit | b4d719c1ea2a843a762a4831999a461b19a9f1e0 (patch) | |
| tree | f579622f28716053853cd393672d749115eb4c45 /pcap_get_selectable_fd.3pcap | |
| parent | d61d4ede72cce3b850105b7ce0da9e4f120d45c1 (diff) | |
| download | libpcap-b4d719c1ea2a843a762a4831999a461b19a9f1e0.tar.gz | |
Call the timeout the "packet buffer timeout" rather than the "read timeout".
That should make it clearer that the timeout does *not* guarantee that a
call that reads packets will return within N milliseconds even if no
packets arrive.
In the pcap_open_live() and pcap_set_timeout() calls, point to the
detailed description of the packet buffer timeout in pcap(3PCAP).
Diffstat (limited to 'pcap_get_selectable_fd.3pcap')
| -rw-r--r-- | pcap_get_selectable_fd.3pcap | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/pcap_get_selectable_fd.3pcap b/pcap_get_selectable_fd.3pcap index 86b0c268..aa457a23 100644 --- a/pcap_get_selectable_fd.3pcap +++ b/pcap_get_selectable_fd.3pcap @@ -17,7 +17,7 @@ .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. .\" -.TH PCAP_GET_SELECTABLE_FD 3PCAP "18 October 2014" +.TH PCAP_GET_SELECTABLE_FD 3PCAP "20 January 2017" .SH NAME pcap_get_selectable_fd \- get a file descriptor on which a select() can be done for a live capture @@ -55,8 +55,8 @@ or DAG devices), so \-1 is returned for those devices. .PP Note that a descriptor on which a read can be done without blocking may, -on some platforms, not have any packets to read if the read timeout has -expired. A call to +on some platforms, not have any packets to read if the packet buffer +timeout has expired. A call to .B pcap_dispatch() will return 0 in this case, but will not block. .PP @@ -81,7 +81,7 @@ being FreeBSD 4.3 and 4.4), but a simple or .B poll() will not indicate that the descriptor is readable until a full buffer's -worth of packets is received, even if the read timeout expires before +worth of packets is received, even if the packet timeout expires before then. To work around this, an application that uses .B select() or @@ -92,7 +92,7 @@ in non-blocking mode, and must arrange that the .B select() or .B poll() -have a timeout less than or equal to the read timeout, +have a timeout less than or equal to the packet buffer timeout, and must try to read packets after that timeout expires, regardless of whether .B select() |