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Date: Sat, 21 Mar 2015 20:15:32 +0100 (CET)
From: Tilman Schmidt <tilman@...p.cc>
To: netdev@...r.kernel.org
Cc: David Miller <davem@...emloft.net>, Hansjoerg Lipp <hjlipp@....de>,
Karsten Keil <isdn@...ux-pingi.de>,
isdn4linux@...tserv.isdn4linux.de
Subject: [PATCH 2/4] isdn/gigaset: restructure modem response parser (2)
Separate literal string handling from main parser loop.
Signed-off-by: Tilman Schmidt <tilman@...p.cc>
---
drivers/isdn/gigaset/ev-layer.c | 126 ++++++++++++++++++----------------------
1 file changed, 57 insertions(+), 69 deletions(-)
diff --git a/drivers/isdn/gigaset/ev-layer.c b/drivers/isdn/gigaset/ev-layer.c
index d1b84f4..b2a1fb1 100644
--- a/drivers/isdn/gigaset/ev-layer.c
+++ b/drivers/isdn/gigaset/ev-layer.c
@@ -455,91 +455,79 @@ void gigaset_handle_modem_response(struct cardstate *cs)
const struct resp_type_t *rt;
const struct zsau_resp_t *zr;
int curarg;
- int resp_code;
- int param_type;
int abort;
- size_t len;
int cid, parameter;
- int rawstring;
- len = cs->cbytes;
- if (!len) {
+ if (!cs->cbytes) {
/* ignore additional LFs/CRs (M10x config mode or cx100) */
gig_dbg(DEBUG_MCMD, "skipped EOL [%02X]", cs->respdata[0]);
return;
}
- cs->respdata[len] = 0;
- argv[0] = cs->respdata;
- params = 1;
+ cs->respdata[cs->cbytes] = 0;
+
if (cs->at_state.getstring) {
- /* getstring only allowed without cid at the moment */
+ /* state machine wants next line verbatim */
cs->at_state.getstring = 0;
- rawstring = 1;
- cid = 0;
- } else {
- /* parse line */
- for (i = 0; i < len; i++)
- switch (cs->respdata[i]) {
- case ';':
- case ',':
- case '=':
- if (params > MAX_REC_PARAMS) {
- dev_warn(cs->dev,
- "too many parameters in response\n");
- /* need last parameter (might be CID) */
- params--;
- }
- argv[params++] = cs->respdata + i + 1;
- }
+ ptr = kstrdup(cs->respdata, GFP_ATOMIC);
+ gig_dbg(DEBUG_EVENT, "string==%s", ptr ? ptr : "NULL");
+ add_cid_event(cs, 0, RSP_STRING, ptr, 0);
+ return;
+ }
- rawstring = 0;
- cid = params > 1 ? cid_of_response(argv[params - 1]) : 0;
- if (cid < 0) {
- gigaset_add_event(cs, &cs->at_state, RSP_INVAL,
- NULL, 0, NULL);
- return;
+ /* parse line */
+ argv[0] = cs->respdata;
+ params = 1;
+ for (i = 0; i < cs->cbytes; i++)
+ switch (cs->respdata[i]) {
+ case ';':
+ case ',':
+ case '=':
+ if (params > MAX_REC_PARAMS) {
+ dev_warn(cs->dev,
+ "too many parameters in response\n");
+ /* need last parameter (might be CID) */
+ params--;
+ }
+ argv[params++] = cs->respdata + i + 1;
}
- for (j = 1; j < params; ++j)
- argv[j][-1] = 0;
+ cid = params > 1 ? cid_of_response(argv[params - 1]) : 0;
+ if (cid < 0) {
+ gigaset_add_event(cs, &cs->at_state, RSP_INVAL, NULL, 0, NULL);
+ return;
+ }
+
+ for (j = 1; j < params; ++j)
+ argv[j][-1] = 0;
- gig_dbg(DEBUG_EVENT, "CMD received: %s", argv[0]);
- if (cid) {
- --params;
- gig_dbg(DEBUG_EVENT, "CID: %s", argv[params]);
- }
- gig_dbg(DEBUG_EVENT, "available params: %d", params - 1);
- for (j = 1; j < params; j++)
- gig_dbg(DEBUG_EVENT, "param %d: %s", j, argv[j]);
+ gig_dbg(DEBUG_EVENT, "CMD received: %s", argv[0]);
+ if (cid) {
+ --params;
+ gig_dbg(DEBUG_EVENT, "CID: %s", argv[params]);
}
+ gig_dbg(DEBUG_EVENT, "available params: %d", params - 1);
+ for (j = 1; j < params; j++)
+ gig_dbg(DEBUG_EVENT, "param %d: %s", j, argv[j]);
abort = 1;
curarg = 0;
while (curarg < params) {
- if (rawstring) {
- resp_code = RSP_STRING;
- param_type = RT_STRING;
- } else {
- for (rt = resp_type; rt->response; ++rt)
- if (!strcmp(argv[curarg], rt->response))
- break;
-
- if (!rt->response) {
- add_cid_event(cs, 0, RSP_NONE, NULL, 0);
- gig_dbg(DEBUG_EVENT,
- "unknown modem response: '%s'\n",
- argv[curarg]);
+ for (rt = resp_type; rt->response; ++rt)
+ if (!strcmp(argv[curarg], rt->response))
break;
- }
- resp_code = rt->resp_code;
- param_type = rt->type;
- ++curarg;
+ if (!rt->response) {
+ add_cid_event(cs, 0, RSP_NONE, NULL, 0);
+ gig_dbg(DEBUG_EVENT, "unknown modem response: '%s'\n",
+ argv[curarg]);
+ break;
}
- switch (param_type) {
+ ++curarg;
+
+ switch (rt->type) {
case RT_NOTHING:
- add_cid_event(cs, cid, resp_code, NULL, 0);
+ add_cid_event(cs, cid, rt->resp_code, NULL, 0);
break;
case RT_RING:
if (!cid) {
@@ -548,13 +536,13 @@ void gigaset_handle_modem_response(struct cardstate *cs)
add_cid_event(cs, 0, RSP_INVAL, NULL, 0);
abort = 1;
} else {
- add_cid_event(cs, 0, resp_code, NULL, cid);
+ add_cid_event(cs, 0, rt->resp_code, NULL, cid);
abort = 0;
}
break;
case RT_ZSAU:
if (curarg >= params) {
- add_cid_event(cs, cid, resp_code, NULL,
+ add_cid_event(cs, cid, rt->resp_code, NULL,
ZSAU_NONE);
break;
}
@@ -565,7 +553,7 @@ void gigaset_handle_modem_response(struct cardstate *cs)
dev_warn(cs->dev,
"%s: unknown parameter %s after ZSAU\n",
__func__, argv[curarg]);
- add_cid_event(cs, cid, resp_code, NULL, zr->code);
+ add_cid_event(cs, cid, rt->resp_code, NULL, zr->code);
++curarg;
break;
case RT_STRING:
@@ -578,7 +566,7 @@ void gigaset_handle_modem_response(struct cardstate *cs)
ptr = NULL;
}
gig_dbg(DEBUG_EVENT, "string==%s", ptr ? ptr : "NULL");
- add_cid_event(cs, cid, resp_code, ptr, 0);
+ add_cid_event(cs, cid, rt->resp_code, ptr, 0);
break;
case RT_ZCAU:
parameter = -1;
@@ -591,15 +579,15 @@ void gigaset_handle_modem_response(struct cardstate *cs)
parameter = (type << 8) | value;
} else
curarg = params - 1;
- add_cid_event(cs, cid, resp_code, NULL, parameter);
+ add_cid_event(cs, cid, rt->resp_code, NULL, parameter);
break;
case RT_NUMBER:
if (curarg >= params ||
kstrtoint(argv[curarg++], 10, ¶meter))
parameter = -1;
gig_dbg(DEBUG_EVENT, "parameter==%d", parameter);
- add_cid_event(cs, cid, resp_code, NULL, parameter);
- if (resp_code == RSP_ZDLE)
+ add_cid_event(cs, cid, rt->resp_code, NULL, parameter);
+ if (rt->resp_code == RSP_ZDLE)
cs->dle = parameter;
break;
}
--
1.9.2.459.g68773ac
--
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