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isdn/gigaset: restructure modem response parser (2) 

Separate literal string handling from main parser loop.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tilman Schmidt 2015-03-21 20:15:32 +01:00 committed by David S. Miller
parent 6bf5011435
commit 4df1e525af
1 changed files with 58 additions and 70 deletions
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128
drivers/isdn/gigaset/ev-layer.c
View File

@ -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;
cs->respdata[cs->cbytes] = 0;
if (cs->at_state.getstring) {
/* state machine wants next line verbatim */
cs->at_state.getstring = 0;
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;
}
/* parse line */
argv[0] = cs->respdata;
params = 1;
if (cs->at_state.getstring) {
/* getstring only allowed without cid at the moment */
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;
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--;
}
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;
argv[params++] = cs->respdata + i + 1;
}
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]);
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]);
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, &parameter))
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;
}