dumpcap: improve some secondary error emssages.

For "PacketReceivePacket error: The device has been removed. (1617)",
report the error in that fashion, indicate that the interface is no
longer attached, *and* suggest that this may be an Npcap bug and that
the user should report it as such; give the URL for the Npcap issue
list.

For "The other host terminated the connection", report the error in that
fashion, and suggest that it might be a problem with the host on which
the capture is being done.

Hopefully this will mean fewer bugs filed as *Wireshark* bugs for those
issues.

(And, with any new capture API in libpcap, these should all turn into
specific PCAP_ERROR_ codes, to make it easier to detect them in callers
of libpcap.)

1 files changed, 10 insertions, 0 deletions

diff --git a/dumpcap.c b/dumpcap.c
index 43ce870d1e..a952952c3e 100644
--- a/dumpcap.c
+++ b/dumpcap.c
@@ -4174,6 +4174,16 @@ capture_loop_start(capture_options *capture_opts, gboolean *stats_known, struct
                 report_capture_error("The network adapter on which the capture was being done "
                                      "is no longer attached; the capture has stopped.",
                                      "");
+            } else if (strcmp(cap_err_str, "PacketReceivePacket error: The device has been removed. (1617)") == 0) {
+                report_capture_error(cap_err_str,
+                                     "The network adapter on which the capture was being done "
+                                     "is no longer attached; the capture has stopped.\n\n"
+                                     "This may be a bug in Npcap: please report it "
+                                     "as an issue at https://github.com/nmap/npcap/issues");
+            } else if (strcmp(cap_err_str, "The other host terminated the connection") == 0) {
+                report_capture_error(cap_err_str,
+                                     "This may be a problem with the remote host "
+                                     "on which you are capturing packets.");
             } else {
                 g_snprintf(errmsg, sizeof(errmsg), "Error while capturing packets: %s",
                            cap_err_str);