*/
device_copy = strdup(device);
adapter = PacketOpenAdapter(device_copy);
+ error = GetLastError();
free(device_copy);
- if (adapter != NULL)
+ if (adapter == NULL)
{
+ /* If we can't open the device now, we won't be able to later, either. */
+ pcap_fmt_errmsg_for_win32_err(ebuf, PCAP_ERRBUF_SIZE,
+ error, "Error opening adapter");
+ pcap_close(p);
+ return (NULL);
+ }
+ /*
+ * Get the total number of time stamp modes.
+ *
+ * The buffer for PacketGetTimestampModes() is
+ * a sequence of 1 or more ULONGs. What's
+ * passed to PacketGetTimestampModes() should have
+ * the total number of ULONGs in the first ULONG;
+ * what's returned *from* PacketGetTimestampModes()
+ * has the total number of time stamp modes in
+ * the first ULONG.
+ *
+ * Yes, that means if there are N time stamp
+ * modes, the first ULONG should be set to N+1
+ * on input, and will be set to N on output.
+ *
+ * We first make a call to PacketGetTimestampModes()
+ * with a pointer to a single ULONG set to 1; the
+ * call should fail with ERROR_MORE_DATA (unless
+ * there are *no* modes, but that should never
+ * happen), and that ULONG should be set to the
+ * number of modes.
+ */
+ num_ts_modes = 1;
+ ret = PacketGetTimestampModes(adapter, &num_ts_modes);
+ if (!ret) {
/*
- * Get the total number of time stamp modes.
- *
- * The buffer for PacketGetTimestampModes() is
- * a sequence of 1 or more ULONGs. What's
- * passed to PacketGetTimestampModes() should have
- * the total number of ULONGs in the first ULONG;
- * what's returned *from* PacketGetTimestampModes()
- * has the total number of time stamp modes in
- * the first ULONG.
- *
- * Yes, that means if there are N time stamp
- * modes, the first ULONG should be set to N+1
- * on input, and will be set to N on output.
- *
- * We first make a call to PacketGetTimestampModes()
- * with a pointer to a single ULONG set to 1; the
- * call should fail with ERROR_MORE_DATA (unless
- * there are *no* modes, but that should never
- * happen), and that ULONG should be set to the
- * number of modes.
+ * OK, it failed. Did it fail with
+ * ERROR_MORE_DATA?
*/
- num_ts_modes = 1;
- ret = PacketGetTimestampModes(adapter, &num_ts_modes);
- if (!ret) {
+ error = GetLastError();
+ if (error != ERROR_MORE_DATA) {
/*
- * OK, it failed. Did it fail with
- * ERROR_MORE_DATA?
+ * No, did it fail with ERROR_INVALID_FUNCTION?
*/
- error = GetLastError();
- if (error != ERROR_MORE_DATA) {
+ if (error == ERROR_INVALID_FUNCTION) {
/*
- * No, did it fail with ERROR_INVALID_FUNCTION?
- */
- if (error == ERROR_INVALID_FUNCTION) {
- /*
- * This is probably due to
- * the driver with which Packet.dll
- * communicates being older, or
- * being a WinPcap driver, so
- * that it doesn't support
- * BIOCGTIMESTAMPMODES.
- *
- * Tell the user to try uninstalling
- * Npcap - and WinPcap if installed -
- * and re-installing it, to flush
- * out all older drivers.
- */
- snprintf(ebuf, PCAP_ERRBUF_SIZE,
- "PacketGetTimestampModes() failed with ERROR_INVALID_FUNCTION; try uninstalling Npcap, and WinPcap if installed, and re-installing it from npcap.org");
- pcap_close(p);
- return (NULL);
- }
-
- /*
- * No, some other error. Fail.
+ * This is probably due to
+ * the driver with which Packet.dll
+ * communicates being older, or
+ * being a WinPcap driver, so
+ * that it doesn't support
+ * BIOCGTIMESTAMPMODES.
+ *
+ * Tell the user to try uninstalling
+ * Npcap - and WinPcap if installed -
+ * and re-installing it, to flush
+ * out all older drivers.
*/
- pcap_fmt_errmsg_for_win32_err(ebuf,
- PCAP_ERRBUF_SIZE, GetLastError(),
- "Error calling PacketGetTimestampModes");
+ snprintf(ebuf, PCAP_ERRBUF_SIZE,
+ "PacketGetTimestampModes() failed with ERROR_INVALID_FUNCTION; try uninstalling Npcap, and WinPcap if installed, and re-installing it from npcap.org");
pcap_close(p);
return (NULL);
}
/*
- * Yes, so we now know how many types to fetch.
- *
- * The buffer needs to have one ULONG for the
- * count and num_ts_modes ULONGs for the
- * num_ts_modes time stamp types.
- */
- modes = (ULONG *)malloc((1 + num_ts_modes) * sizeof(ULONG));
- if (modes == NULL) {
- /* Out of memory. */
- /* XXX SET ebuf */
- pcap_close(p);
- return (NULL);
- }
- modes[0] = 1 + num_ts_modes;
- if (!PacketGetTimestampModes(adapter, modes)) {
- pcap_fmt_errmsg_for_win32_err(ebuf,
- PCAP_ERRBUF_SIZE, GetLastError(),
- "Error calling PacketGetTimestampModes");
- free(modes);
- pcap_close(p);
- return (NULL);
- }
- if (modes[0] != num_ts_modes) {
- snprintf(ebuf, PCAP_ERRBUF_SIZE,
- "First PacketGetTimestampModes() call gives %lu modes, second call gives %lu modes",
- num_ts_modes, modes[0]);
+ * No, some other error. Fail.
+ */
+ pcap_fmt_errmsg_for_win32_err(ebuf,
+ PCAP_ERRBUF_SIZE, error,
+ "Error calling PacketGetTimestampModes");
+ pcap_close(p);
+ return (NULL);
+ }
+
+ /*
+ * Yes, so we now know how many types to fetch.
+ *
+ * The buffer needs to have one ULONG for the
+ * count and num_ts_modes ULONGs for the
+ * num_ts_modes time stamp types.
+ */
+ modes = (ULONG *)malloc((1 + num_ts_modes) * sizeof(ULONG));
+ if (modes == NULL) {
+ /* Out of memory. */
+ pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, errno, "malloc");
+ pcap_close(p);
+ return (NULL);
+ }
+ modes[0] = 1 + num_ts_modes;
+ if (!PacketGetTimestampModes(adapter, modes)) {
+ pcap_fmt_errmsg_for_win32_err(ebuf,
+ PCAP_ERRBUF_SIZE, GetLastError(),
+ "Error calling PacketGetTimestampModes");
+ free(modes);
+ pcap_close(p);
+ return (NULL);
+ }
+ if (modes[0] != num_ts_modes) {
+ snprintf(ebuf, PCAP_ERRBUF_SIZE,
+ "First PacketGetTimestampModes() call gives %lu modes, second call gives %lu modes",
+ num_ts_modes, modes[0]);
+ free(modes);
+ pcap_close(p);
+ return (NULL);
+ }
+ if (num_ts_modes != 0) {
+ u_int num_ts_types;
+
+ /*
+ * Allocate a buffer big enough for
+ * PCAP_TSTAMP_HOST (default) plus
+ * the explicitly specified modes.
+ */
+ p->tstamp_type_list = malloc((1 + modes[0]) * sizeof(u_int));
+ if (p->tstamp_type_list == NULL) {
+ pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, errno, "malloc");
free(modes);
pcap_close(p);
return (NULL);
}
- if (num_ts_modes != 0) {
- u_int num_ts_types;
+ num_ts_types = 0;
+ p->tstamp_type_list[num_ts_types] =
+ PCAP_TSTAMP_HOST;
+ num_ts_types++;
+ for (ULONG i = 0; i < modes[0]; i++) {
+ switch (modes[i + 1]) {
+
+ case TIMESTAMPMODE_SINGLE_SYNCHRONIZATION:
+ /*
+ * Better than low-res,
+ * but *not* synchronized
+ * with the OS clock.
+ */
+ p->tstamp_type_list[num_ts_types] =
+ PCAP_TSTAMP_HOST_HIPREC_UNSYNCED;
+ num_ts_types++;
+ break;
- /*
- * Allocate a buffer big enough for
- * PCAP_TSTAMP_HOST (default) plus
- * the explicitly specified modes.
- */
- p->tstamp_type_list = malloc((1 + modes[0]) * sizeof(u_int));
- if (p->tstamp_type_list == NULL) {
- /* XXX SET ebuf */
- free(modes);
- pcap_close(p);
- return (NULL);
- }
- num_ts_types = 0;
- p->tstamp_type_list[num_ts_types] =
- PCAP_TSTAMP_HOST;
- num_ts_types++;
- for (ULONG i = 0; i < modes[0]; i++) {
- switch (modes[i + 1]) {
-
- case TIMESTAMPMODE_SINGLE_SYNCHRONIZATION:
- /*
- * Better than low-res,
- * but *not* synchronized
- * with the OS clock.
- */
- p->tstamp_type_list[num_ts_types] =
- PCAP_TSTAMP_HOST_HIPREC_UNSYNCED;
- num_ts_types++;
- break;
-
- case TIMESTAMPMODE_QUERYSYSTEMTIME:
- /*
- * Low-res, but synchronized
- * with the OS clock.
- */
- p->tstamp_type_list[num_ts_types] =
- PCAP_TSTAMP_HOST_LOWPREC;
- num_ts_types++;
- break;
-
- case TIMESTAMPMODE_QUERYSYSTEMTIME_PRECISE:
- /*
- * High-res, and synchronized
- * with the OS clock.
- */
- p->tstamp_type_list[num_ts_types] =
- PCAP_TSTAMP_HOST_HIPREC;
- num_ts_types++;
- break;
-
- default:
- /*
- * Unknown, so we can't
- * report it.
- */
- break;
- }
+ case TIMESTAMPMODE_QUERYSYSTEMTIME:
+ /*
+ * Low-res, but synchronized
+ * with the OS clock.
+ */
+ p->tstamp_type_list[num_ts_types] =
+ PCAP_TSTAMP_HOST_LOWPREC;
+ num_ts_types++;
+ break;
+
+ case TIMESTAMPMODE_QUERYSYSTEMTIME_PRECISE:
+ /*
+ * High-res, and synchronized
+ * with the OS clock.
+ */
+ p->tstamp_type_list[num_ts_types] =
+ PCAP_TSTAMP_HOST_HIPREC;
+ num_ts_types++;
+ break;
+
+ default:
+ /*
+ * Unknown, so we can't
+ * report it.
+ */
+ break;
}
- p->tstamp_type_count = num_ts_types;
- free(modes);
}
+ p->tstamp_type_count = num_ts_types;
+ free(modes);
}
- PacketCloseAdapter(adapter);
}
+ PacketCloseAdapter(adapter);
#endif /* HAVE_PACKET_GET_TIMESTAMP_MODES */
return (p);
projects / libpcap / commitdiff
