a geicko-2 based round robin ranking system designed to test c++ battleship submissions
battleship.dunkirk.sh
dunkirk.sh
1// Copyright 2021 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package unix
6
7import "unsafe"
8
9// IoctlRetInt performs an ioctl operation specified by req on a device
10// associated with opened file descriptor fd, and returns a non-negative
11// integer that is returned by the ioctl syscall.
12func IoctlRetInt(fd int, req uint) (int, error) {
13 ret, _, err := Syscall(SYS_IOCTL, uintptr(fd), uintptr(req), 0)
14 if err != 0 {
15 return 0, err
16 }
17 return int(ret), nil
18}
19
20func IoctlGetUint32(fd int, req uint) (uint32, error) {
21 var value uint32
22 err := ioctlPtr(fd, req, unsafe.Pointer(&value))
23 return value, err
24}
25
26func IoctlGetRTCTime(fd int) (*RTCTime, error) {
27 var value RTCTime
28 err := ioctlPtr(fd, RTC_RD_TIME, unsafe.Pointer(&value))
29 return &value, err
30}
31
32func IoctlSetRTCTime(fd int, value *RTCTime) error {
33 return ioctlPtr(fd, RTC_SET_TIME, unsafe.Pointer(value))
34}
35
36func IoctlGetRTCWkAlrm(fd int) (*RTCWkAlrm, error) {
37 var value RTCWkAlrm
38 err := ioctlPtr(fd, RTC_WKALM_RD, unsafe.Pointer(&value))
39 return &value, err
40}
41
42func IoctlSetRTCWkAlrm(fd int, value *RTCWkAlrm) error {
43 return ioctlPtr(fd, RTC_WKALM_SET, unsafe.Pointer(value))
44}
45
46// IoctlGetEthtoolDrvinfo fetches ethtool driver information for the network
47// device specified by ifname.
48func IoctlGetEthtoolDrvinfo(fd int, ifname string) (*EthtoolDrvinfo, error) {
49 ifr, err := NewIfreq(ifname)
50 if err != nil {
51 return nil, err
52 }
53
54 value := EthtoolDrvinfo{Cmd: ETHTOOL_GDRVINFO}
55 ifrd := ifr.withData(unsafe.Pointer(&value))
56
57 err = ioctlIfreqData(fd, SIOCETHTOOL, &ifrd)
58 return &value, err
59}
60
61// IoctlGetEthtoolTsInfo fetches ethtool timestamping and PHC
62// association for the network device specified by ifname.
63func IoctlGetEthtoolTsInfo(fd int, ifname string) (*EthtoolTsInfo, error) {
64 ifr, err := NewIfreq(ifname)
65 if err != nil {
66 return nil, err
67 }
68
69 value := EthtoolTsInfo{Cmd: ETHTOOL_GET_TS_INFO}
70 ifrd := ifr.withData(unsafe.Pointer(&value))
71
72 err = ioctlIfreqData(fd, SIOCETHTOOL, &ifrd)
73 return &value, err
74}
75
76// IoctlGetHwTstamp retrieves the hardware timestamping configuration
77// for the network device specified by ifname.
78func IoctlGetHwTstamp(fd int, ifname string) (*HwTstampConfig, error) {
79 ifr, err := NewIfreq(ifname)
80 if err != nil {
81 return nil, err
82 }
83
84 value := HwTstampConfig{}
85 ifrd := ifr.withData(unsafe.Pointer(&value))
86
87 err = ioctlIfreqData(fd, SIOCGHWTSTAMP, &ifrd)
88 return &value, err
89}
90
91// IoctlSetHwTstamp updates the hardware timestamping configuration for
92// the network device specified by ifname.
93func IoctlSetHwTstamp(fd int, ifname string, cfg *HwTstampConfig) error {
94 ifr, err := NewIfreq(ifname)
95 if err != nil {
96 return err
97 }
98 ifrd := ifr.withData(unsafe.Pointer(cfg))
99 return ioctlIfreqData(fd, SIOCSHWTSTAMP, &ifrd)
100}
101
102// FdToClockID derives the clock ID from the file descriptor number
103// - see clock_gettime(3), FD_TO_CLOCKID macros. The resulting ID is
104// suitable for system calls like ClockGettime.
105func FdToClockID(fd int) int32 { return int32((int(^fd) << 3) | 3) }
106
107// IoctlPtpClockGetcaps returns the description of a given PTP device.
108func IoctlPtpClockGetcaps(fd int) (*PtpClockCaps, error) {
109 var value PtpClockCaps
110 err := ioctlPtr(fd, PTP_CLOCK_GETCAPS2, unsafe.Pointer(&value))
111 return &value, err
112}
113
114// IoctlPtpSysOffsetPrecise returns a description of the clock
115// offset compared to the system clock.
116func IoctlPtpSysOffsetPrecise(fd int) (*PtpSysOffsetPrecise, error) {
117 var value PtpSysOffsetPrecise
118 err := ioctlPtr(fd, PTP_SYS_OFFSET_PRECISE2, unsafe.Pointer(&value))
119 return &value, err
120}
121
122// IoctlPtpSysOffsetExtended returns an extended description of the
123// clock offset compared to the system clock. The samples parameter
124// specifies the desired number of measurements.
125func IoctlPtpSysOffsetExtended(fd int, samples uint) (*PtpSysOffsetExtended, error) {
126 value := PtpSysOffsetExtended{Samples: uint32(samples)}
127 err := ioctlPtr(fd, PTP_SYS_OFFSET_EXTENDED2, unsafe.Pointer(&value))
128 return &value, err
129}
130
131// IoctlPtpPinGetfunc returns the configuration of the specified
132// I/O pin on given PTP device.
133func IoctlPtpPinGetfunc(fd int, index uint) (*PtpPinDesc, error) {
134 value := PtpPinDesc{Index: uint32(index)}
135 err := ioctlPtr(fd, PTP_PIN_GETFUNC2, unsafe.Pointer(&value))
136 return &value, err
137}
138
139// IoctlPtpPinSetfunc updates configuration of the specified PTP
140// I/O pin.
141func IoctlPtpPinSetfunc(fd int, pd *PtpPinDesc) error {
142 return ioctlPtr(fd, PTP_PIN_SETFUNC2, unsafe.Pointer(pd))
143}
144
145// IoctlPtpPeroutRequest configures the periodic output mode of the
146// PTP I/O pins.
147func IoctlPtpPeroutRequest(fd int, r *PtpPeroutRequest) error {
148 return ioctlPtr(fd, PTP_PEROUT_REQUEST2, unsafe.Pointer(r))
149}
150
151// IoctlPtpExttsRequest configures the external timestamping mode
152// of the PTP I/O pins.
153func IoctlPtpExttsRequest(fd int, r *PtpExttsRequest) error {
154 return ioctlPtr(fd, PTP_EXTTS_REQUEST2, unsafe.Pointer(r))
155}
156
157// IoctlGetWatchdogInfo fetches information about a watchdog device from the
158// Linux watchdog API. For more information, see:
159// https://www.kernel.org/doc/html/latest/watchdog/watchdog-api.html.
160func IoctlGetWatchdogInfo(fd int) (*WatchdogInfo, error) {
161 var value WatchdogInfo
162 err := ioctlPtr(fd, WDIOC_GETSUPPORT, unsafe.Pointer(&value))
163 return &value, err
164}
165
166// IoctlWatchdogKeepalive issues a keepalive ioctl to a watchdog device. For
167// more information, see:
168// https://www.kernel.org/doc/html/latest/watchdog/watchdog-api.html.
169func IoctlWatchdogKeepalive(fd int) error {
170 // arg is ignored and not a pointer, so ioctl is fine instead of ioctlPtr.
171 return ioctl(fd, WDIOC_KEEPALIVE, 0)
172}
173
174// IoctlFileCloneRange performs an FICLONERANGE ioctl operation to clone the
175// range of data conveyed in value to the file associated with the file
176// descriptor destFd. See the ioctl_ficlonerange(2) man page for details.
177func IoctlFileCloneRange(destFd int, value *FileCloneRange) error {
178 return ioctlPtr(destFd, FICLONERANGE, unsafe.Pointer(value))
179}
180
181// IoctlFileClone performs an FICLONE ioctl operation to clone the entire file
182// associated with the file description srcFd to the file associated with the
183// file descriptor destFd. See the ioctl_ficlone(2) man page for details.
184func IoctlFileClone(destFd, srcFd int) error {
185 return ioctl(destFd, FICLONE, uintptr(srcFd))
186}
187
188type FileDedupeRange struct {
189 Src_offset uint64
190 Src_length uint64
191 Reserved1 uint16
192 Reserved2 uint32
193 Info []FileDedupeRangeInfo
194}
195
196type FileDedupeRangeInfo struct {
197 Dest_fd int64
198 Dest_offset uint64
199 Bytes_deduped uint64
200 Status int32
201 Reserved uint32
202}
203
204// IoctlFileDedupeRange performs an FIDEDUPERANGE ioctl operation to share the
205// range of data conveyed in value from the file associated with the file
206// descriptor srcFd to the value.Info destinations. See the
207// ioctl_fideduperange(2) man page for details.
208func IoctlFileDedupeRange(srcFd int, value *FileDedupeRange) error {
209 buf := make([]byte, SizeofRawFileDedupeRange+
210 len(value.Info)*SizeofRawFileDedupeRangeInfo)
211 rawrange := (*RawFileDedupeRange)(unsafe.Pointer(&buf[0]))
212 rawrange.Src_offset = value.Src_offset
213 rawrange.Src_length = value.Src_length
214 rawrange.Dest_count = uint16(len(value.Info))
215 rawrange.Reserved1 = value.Reserved1
216 rawrange.Reserved2 = value.Reserved2
217
218 for i := range value.Info {
219 rawinfo := (*RawFileDedupeRangeInfo)(unsafe.Pointer(
220 uintptr(unsafe.Pointer(&buf[0])) + uintptr(SizeofRawFileDedupeRange) +
221 uintptr(i*SizeofRawFileDedupeRangeInfo)))
222 rawinfo.Dest_fd = value.Info[i].Dest_fd
223 rawinfo.Dest_offset = value.Info[i].Dest_offset
224 rawinfo.Bytes_deduped = value.Info[i].Bytes_deduped
225 rawinfo.Status = value.Info[i].Status
226 rawinfo.Reserved = value.Info[i].Reserved
227 }
228
229 err := ioctlPtr(srcFd, FIDEDUPERANGE, unsafe.Pointer(&buf[0]))
230
231 // Output
232 for i := range value.Info {
233 rawinfo := (*RawFileDedupeRangeInfo)(unsafe.Pointer(
234 uintptr(unsafe.Pointer(&buf[0])) + uintptr(SizeofRawFileDedupeRange) +
235 uintptr(i*SizeofRawFileDedupeRangeInfo)))
236 value.Info[i].Dest_fd = rawinfo.Dest_fd
237 value.Info[i].Dest_offset = rawinfo.Dest_offset
238 value.Info[i].Bytes_deduped = rawinfo.Bytes_deduped
239 value.Info[i].Status = rawinfo.Status
240 value.Info[i].Reserved = rawinfo.Reserved
241 }
242
243 return err
244}
245
246func IoctlHIDGetDesc(fd int, value *HIDRawReportDescriptor) error {
247 return ioctlPtr(fd, HIDIOCGRDESC, unsafe.Pointer(value))
248}
249
250func IoctlHIDGetRawInfo(fd int) (*HIDRawDevInfo, error) {
251 var value HIDRawDevInfo
252 err := ioctlPtr(fd, HIDIOCGRAWINFO, unsafe.Pointer(&value))
253 return &value, err
254}
255
256func IoctlHIDGetRawName(fd int) (string, error) {
257 var value [_HIDIOCGRAWNAME_LEN]byte
258 err := ioctlPtr(fd, _HIDIOCGRAWNAME, unsafe.Pointer(&value[0]))
259 return ByteSliceToString(value[:]), err
260}
261
262func IoctlHIDGetRawPhys(fd int) (string, error) {
263 var value [_HIDIOCGRAWPHYS_LEN]byte
264 err := ioctlPtr(fd, _HIDIOCGRAWPHYS, unsafe.Pointer(&value[0]))
265 return ByteSliceToString(value[:]), err
266}
267
268func IoctlHIDGetRawUniq(fd int) (string, error) {
269 var value [_HIDIOCGRAWUNIQ_LEN]byte
270 err := ioctlPtr(fd, _HIDIOCGRAWUNIQ, unsafe.Pointer(&value[0]))
271 return ByteSliceToString(value[:]), err
272}
273
274// IoctlIfreq performs an ioctl using an Ifreq structure for input and/or
275// output. See the netdevice(7) man page for details.
276func IoctlIfreq(fd int, req uint, value *Ifreq) error {
277 // It is possible we will add more fields to *Ifreq itself later to prevent
278 // misuse, so pass the raw *ifreq directly.
279 return ioctlPtr(fd, req, unsafe.Pointer(&value.raw))
280}
281
282// TODO(mdlayher): export if and when IfreqData is exported.
283
284// ioctlIfreqData performs an ioctl using an ifreqData structure for input
285// and/or output. See the netdevice(7) man page for details.
286func ioctlIfreqData(fd int, req uint, value *ifreqData) error {
287 // The memory layout of IfreqData (type-safe) and ifreq (not type-safe) are
288 // identical so pass *IfreqData directly.
289 return ioctlPtr(fd, req, unsafe.Pointer(value))
290}
291
292// IoctlKCMClone attaches a new file descriptor to a multiplexor by cloning an
293// existing KCM socket, returning a structure containing the file descriptor of
294// the new socket.
295func IoctlKCMClone(fd int) (*KCMClone, error) {
296 var info KCMClone
297 if err := ioctlPtr(fd, SIOCKCMCLONE, unsafe.Pointer(&info)); err != nil {
298 return nil, err
299 }
300
301 return &info, nil
302}
303
304// IoctlKCMAttach attaches a TCP socket and associated BPF program file
305// descriptor to a multiplexor.
306func IoctlKCMAttach(fd int, info KCMAttach) error {
307 return ioctlPtr(fd, SIOCKCMATTACH, unsafe.Pointer(&info))
308}
309
310// IoctlKCMUnattach unattaches a TCP socket file descriptor from a multiplexor.
311func IoctlKCMUnattach(fd int, info KCMUnattach) error {
312 return ioctlPtr(fd, SIOCKCMUNATTACH, unsafe.Pointer(&info))
313}
314
315// IoctlLoopGetStatus64 gets the status of the loop device associated with the
316// file descriptor fd using the LOOP_GET_STATUS64 operation.
317func IoctlLoopGetStatus64(fd int) (*LoopInfo64, error) {
318 var value LoopInfo64
319 if err := ioctlPtr(fd, LOOP_GET_STATUS64, unsafe.Pointer(&value)); err != nil {
320 return nil, err
321 }
322 return &value, nil
323}
324
325// IoctlLoopSetStatus64 sets the status of the loop device associated with the
326// file descriptor fd using the LOOP_SET_STATUS64 operation.
327func IoctlLoopSetStatus64(fd int, value *LoopInfo64) error {
328 return ioctlPtr(fd, LOOP_SET_STATUS64, unsafe.Pointer(value))
329}
330
331// IoctlLoopConfigure configures all loop device parameters in a single step
332func IoctlLoopConfigure(fd int, value *LoopConfig) error {
333 return ioctlPtr(fd, LOOP_CONFIGURE, unsafe.Pointer(value))
334}