[PATCH] huawei: handle unquoted strings in ^SYSINFOEX response

[Ben Chan]

The patch modifies sysinfoex_parse() in MMBroadbandModemHuawei to handle
unquoted <sysmode_name> and <submode_name> fields in ^SYSINFOEX
responses, which are seen on some Huawei modems (e.g. E303).
---
After applying this patch, here's what I observed on E303 and MU736:

E303:
  [mm-at-serial-port.c:436] debug_log(): (ttyUSB2): --> 'AT^SYSINFOEX<CR>'
  [mm-at-serial-port.c:436] debug_log(): (ttyUSB2): <-- '<CR><LF>^SYSINFOEX:2,3,0,1,,1,GSM,3,EDGE<CR><LF><CR><LF>OK<CR><LF>'
  [huawei/mm-broadband-modem-huawei.c:674] load_access_technologies_finish(): Access Technology: 'edge'

MU736:
  [mm-at-serial-port.c:436] debug_log(): (ttyUSB0): --> 'AT^SYSINFOEX<CR>'
  [mm-at-serial-port.c:436] debug_log(): (ttyUSB0): <-- '<CR><LF>^SYSINFOEX:2,3,0,1,0,3,"WCDMA",44,"HSPA"<CR><LF><CR><LF>OK<CR><LF>'
  [huawei/mm-broadband-modem-huawei.c:674] load_access_technologies_finish(): Access Technology: 'hspa'

 plugins/huawei/mm-broadband-modem-huawei.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/plugins/huawei/mm-broadband-modem-huawei.c b/plugins/huawei/mm-broadband-modem-huawei.c
index 4f231df..1629b58 100644
--- a/plugins/huawei/mm-broadband-modem-huawei.c
+++ b/plugins/huawei/mm-broadband-modem-huawei.c
@@ -202,11 +202,13 @@ sysinfoex_parse (const char *reply,
     /* Format:
      *
      * ^SYSINFOEX: <srv_status>,<srv_domain>,<roam_status>,<sim_state>,<reserved>,<sysmode>,<sysmode_name>,<submode>,<submode_name>
+     *
+     * <sysmode_name> and <submode_name> may not be quoted on some Huawei modems (e.g. E303).
      */
 
     /* ^SYSINFOEX:2,3,0,1,,3,"WCDMA",41,"HSPA+" */
 
-    r = g_regex_new ("\\^SYSINFOEX:\\s*(\\d+),(\\d+),(\\d+),(\\d+),?(\\d*),(\\d+),\"(.*)\",(\\d+),\"(.*)\"$", 0, 0, NULL);
+    r = g_regex_new ("\\^SYSINFOEX:\\s*(\\d+),(\\d+),(\\d+),(\\d+),?(\\d*),(\\d+),\"?([^\"]*)\"?,(\\d+),\"?([^\"]*)\"?$", 0, 0, NULL);
     g_assert (r != NULL);
 
     matched = g_regex_match_full (r, reply, -1, 0, 0, &match_info, &match_error);
-- 
1.8.4