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net: lib: zperf: fix internal UDP header definition

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Fix the zperf UDP datagram header definition, as iperf introduced a
backwards incompatible format change in version 2.0.10 (August 2017).
```
struct UDP_datagram {
// used to reference the 4 byte ID number we place in UDP datagrams
// Support 64 bit seqno on machines that support them
    uint32_t id;
    uint32_t tv_sec;
    uint32_t tv_usec;
    uint32_t id2;
};
```

Update the header to the new format, with a Kconfig option to fall back
to the previous header definition.

The response decoding was testd with a nRF7002 client and
`iperf-2.2.1-win64.exe` server, with the output statistics struct now
containing the same information as reported on the PC server.

Signed-off-by: Jordan Yates <jordan@embeint.com>
This commit is contained in:
Jordan Yates 2025-04-17 14:29:18 +10:00 • committed by Benjamin Cabé
commit 5c8b7cdd89
2 changed files with 12 additions and 1 deletions
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8
subsys/net/lib/zperf/Kconfig
View file

@ -13,6 +13,14 @@ menuconfig NET_ZPERF
if NET_ZPERF
config NET_ZPERF_LEGACY_HEADER_COMPAT
bool "Legacy iperf UDP header format"
help
iperf 2.0.10 (2017) updated the UDP header format in a
backwards incompatible manner that cannot be automatically
detected. This option reverts the header format for use with
iperf version 2.0.9 and earlier.
config ZPERF_WORK_Q_THREAD_PRIORITY
int "zperf work queue thread priority"
default NUM_PREEMPT_PRIORITIES

5
subsys/net/lib/zperf/zperf_internal.h
View file

@ -54,9 +54,12 @@
#define ZPERF_VERSION "1.1"
struct zperf_udp_datagram {
int32_t id;
uint32_t id;
uint32_t tv_sec;
uint32_t tv_usec;
#ifndef CONFIG_NET_ZPERF_LEGACY_HEADER_COMPAT
uint32_t id2;
#endif
} __packed;
BUILD_ASSERT(sizeof(struct zperf_udp_datagram) <= PACKET_SIZE_MAX, "Invalid PACKET_SIZE_MAX");