adb: add reconnect command.

Add reconnect command for debugging. `reconnect` kicks a transport
from the host side, `reconnect device` kicks a transport from
the device side. They can be used to produce transport errors.

Bug: 25935458

Change-Id: I47daa338796b561941e7aba44a51a6dd117d1e98
(cherry picked from commit 1f4ec19e499ba981e4117f647d191603c2713e79)

1 files changed, 11 insertions, 0 deletions

diff --git a/adb/commandline.cpp b/adb/commandline.cpp
index 8e76168cb..e635c3c3e 100644
--- a/adb/commandline.cpp
+++ b/adb/commandline.cpp
@@ -239,6 +239,9 @@ static void help() {
         "  - If it is \"system\", \"vendor\", \"oem\" or \"data\", only the corresponding partition\n"
         "    is updated.\n"
         "\n"
+        "internal debugging:\n"
+        "  adb reconnect                  Kick current connection from host side and make it reconnect.\n"
+        "  adb reconnect device           Kick current connection from device side and make it reconnect.\n"
         "environment variables:\n"
         "  ADB_TRACE                    - Print debug information. A comma separated list of the following values\n"
         "                                 1 or all, adb, sockets, packets, rwx, usb, sync, sysdeps, transport, jdwp\n"
@@ -1857,6 +1860,14 @@ int adb_commandline(int argc, const char **argv) {
             }
         }
         return 0;
+    } else if (!strcmp(argv[0], "reconnect")) {
+        if (argc == 1) {
+            return adb_query_command("host:reconnect");
+        } else if (argc == 2 && !strcmp(argv[1], "device")) {
+            std::string err;
+            adb_connect("reconnect", &err);
+            return 0;
+        }
     }
 
     usage();