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atchannel.c
Package: ril.rar [view]
Upload User: rftzhifu
Upload Date: 2017-02-21
Package Size: 229k
Code Size: 24k
Category:
android
Development Platform:
Unix_Linux
- /* //device/system/reference-ril/atchannel.c
- **
- ** Copyright 2006, The Android Open Source Project
- **
- ** Licensed under the Apache License, Version 2.0 (the "License");
- ** you may not use this file except in compliance with the License.
- ** You may obtain a copy of the License at
- **
- ** http://www.apache.org/licenses/LICENSE-2.0
- **
- ** Unless required by applicable law or agreed to in writing, software
- ** distributed under the License is distributed on an "AS IS" BASIS,
- ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- ** See the License for the specific language governing permissions and
- ** limitations under the License.
- */
- #include "atchannel.h"
- #include "at_tok.h"
- #include <stdio.h>
- #include <string.h>
- #include <pthread.h>
- #include <ctype.h>
- #include <stdlib.h>
- #include <errno.h>
- #include <fcntl.h>
- #include <sys/time.h>
- #include <time.h>
- #include <unistd.h>
- #define LOG_NDEBUG 0
- #define LOG_TAG "AT"
- #include <utils/Log.h>
- #ifdef HAVE_ANDROID_OS
- /* for IOCTL's */
- #include <linux/omap_csmi.h>
- #endif /*HAVE_ANDROID_OS*/
- #include "misc.h"
- #ifdef HAVE_ANDROID_OS
- #define USE_NP 1
- #endif /* HAVE_ANDROID_OS */
- #define NUM_ELEMS(x) (sizeof(x)/sizeof(x[0]))
- #define MAX_AT_RESPONSE (8 * 1024)
- #define HANDSHAKE_RETRY_COUNT 8
- #define HANDSHAKE_TIMEOUT_MSEC 250
- static pthread_t s_tid_reader;
- static int s_fd = -1; /* fd of the AT channel */
- static ATUnsolHandler s_unsolHandler;
- /* for input buffering */
- static char s_ATBuffer[MAX_AT_RESPONSE+1];
- static char *s_ATBufferCur = s_ATBuffer;
- static int s_ackPowerIoctl; /* true if TTY has android byte-count
- handshake for low power*/
- static int s_readCount = 0;
- #if AT_DEBUG
- void AT_DUMP(const char* prefix, const char* buff, int len)
- {
- if (len < 0)
- len = strlen(buff);
- LOGD("%.*s", len, buff);
- }
- #endif
- /*
- * for current pending command
- * these are protected by s_commandmutex
- */
- static pthread_mutex_t s_commandmutex = PTHREAD_MUTEX_INITIALIZER;
- static pthread_cond_t s_commandcond = PTHREAD_COND_INITIALIZER;
- static ATCommandType s_type;
- static const char *s_responsePrefix = NULL;
- static const char *s_smsPDU = NULL;
- static ATResponse *sp_response = NULL;
- static void (*s_onTimeout)(void) = NULL;
- static void (*s_onReaderClosed)(void) = NULL;
- static int s_readerClosed;
- static void onReaderClosed();
- static int writeCtrlZ (const char *s);
- static int writeline (const char *s);
- #ifndef USE_NP
- static void setTimespecRelative(struct timespec *p_ts, long long msec)
- {
- struct timeval tv;
- gettimeofday(&tv, (struct timezone *) NULL);
- /* what's really funny about this is that I know
- pthread_cond_timedwait just turns around and makes this
- a relative time again */
- p_ts->tv_sec = tv.tv_sec + (msec / 1000);
- p_ts->tv_nsec = (tv.tv_usec + (msec % 1000) * 1000L ) * 1000L;
- }
- #endif /*USE_NP*/
- static void sleepMsec(long long msec)
- {
- struct timespec ts;
- int err;
- ts.tv_sec = (msec / 1000);
- ts.tv_nsec = (msec % 1000) * 1000 * 1000;
- do {
- err = nanosleep (&ts, &ts);
- } while (err < 0 && errno == EINTR);
- }
- /** add an intermediate response to sp_response*/
- static void addIntermediate(const char *line)
- {
- ATLine *p_new;
- p_new = (ATLine *) malloc(sizeof(ATLine));
- p_new->line = strdup(line);
- /* note: this adds to the head of the list, so the list
- will be in reverse order of lines received. the order is flipped
- again before passing on to the command issuer */
- p_new->p_next = sp_response->p_intermediates;
- sp_response->p_intermediates = p_new;
- }
- /**
- * returns 1 if line is a final response indicating error
- * See 27.007 annex B
- * WARNING: NO CARRIER and others are sometimes unsolicited
- */
- static const char * s_finalResponsesError[] = {
- "ERROR",
- "+CMS ERROR:",
- "+CME ERROR:",
- "NO CARRIER", /* sometimes! */
- "NO ANSWER",
- "NO DIALTONE",
- };
- static int isFinalResponseError(const char *line)
- {
- size_t i;
- for (i = 0 ; i < NUM_ELEMS(s_finalResponsesError) ; i++) {
- if (strStartsWith(line, s_finalResponsesError[i])) {
- return 1;
- }
- }
- return 0;
- }
- /**
- * returns 1 if line is a final response indicating success
- * See 27.007 annex B
- * WARNING: NO CARRIER and others are sometimes unsolicited
- */
- static const char * s_finalResponsesSuccess[] = {
- "OK",
- "CONNECT" /* some stacks start up data on another channel */
- };
- static int isFinalResponseSuccess(const char *line)
- {
- size_t i;
- for (i = 0 ; i < NUM_ELEMS(s_finalResponsesSuccess) ; i++) {
- if (strStartsWith(line, s_finalResponsesSuccess[i])) {
- return 1;
- }
- }
- return 0;
- }
- /**
- * returns 1 if line is a final response, either error or success
- * See 27.007 annex B
- * WARNING: NO CARRIER and others are sometimes unsolicited
- */
- static int isFinalResponse(const char *line)
- {
- return isFinalResponseSuccess(line) || isFinalResponseError(line);
- }
- /**
- * returns 1 if line is the first line in (what will be) a two-line
- * SMS unsolicited response
- */
- static const char * s_smsUnsoliciteds[] = {
- "+CMT:",
- "+CDS:",
- "+CBM:"
- };
- static int isSMSUnsolicited(const char *line)
- {
- size_t i;
- for (i = 0 ; i < NUM_ELEMS(s_smsUnsoliciteds) ; i++) {
- if (strStartsWith(line, s_smsUnsoliciteds[i])) {
- return 1;
- }
- }
- return 0;
- }
- /** assumes s_commandmutex is held */
- static void handleFinalResponse(const char *line)
- {
- sp_response->finalResponse = strdup(line);
- pthread_cond_signal(&s_commandcond);
- }
- static void handleUnsolicited(const char *line)
- {
- if (s_unsolHandler != NULL) {
- s_unsolHandler(line, NULL);
- }
- }
- static void processLine(const char *line)
- {
- pthread_mutex_lock(&s_commandmutex);
- if (sp_response == NULL) {
- /* no command pending */
- handleUnsolicited(line);
- } else if (isFinalResponseSuccess(line)) {
- sp_response->success = 1;
- handleFinalResponse(line);
- } else if (isFinalResponseError(line)) {
- sp_response->success = 0;
- handleFinalResponse(line);
- } else if (s_smsPDU != NULL && 0 == strcmp(line, "> ")) {
- // See eg. TS 27.005 4.3
- // Commands like AT+CMGS have a "> " prompt
- writeCtrlZ(s_smsPDU);
- s_smsPDU = NULL;
- } else switch (s_type) {
- case NO_RESULT:
- handleUnsolicited(line);
- break;
- case NUMERIC:
- if (sp_response->p_intermediates == NULL
- && isdigit(line[0])
- ) {
- addIntermediate(line);
- } else {
- /* either we already have an intermediate response or
- the line doesn't begin with a digit */
- handleUnsolicited(line);
- }
- break;
- case SINGLELINE:
- if (sp_response->p_intermediates == NULL
- && strStartsWith (line, s_responsePrefix)
- ) {
- addIntermediate(line);
- } else {
- /* we already have an intermediate response */
- handleUnsolicited(line);
- }
- break;
- case MULTILINE:
- if (strStartsWith (line, s_responsePrefix)) {
- addIntermediate(line);
- } else {
- handleUnsolicited(line);
- }
- break;
- default: /* this should never be reached */
- LOGE("Unsupported AT command type %dn", s_type);
- handleUnsolicited(line);
- break;
- }
- pthread_mutex_unlock(&s_commandmutex);
- }
- /**
- * Returns a pointer to the end of the next line
- * special-cases the "> " SMS prompt
- *
- * returns NULL if there is no complete line
- */
- static char * findNextEOL(char *cur)
- {
- if (cur[0] == '>' && cur[1] == ' ' && cur[2] == '') {
- /* SMS prompt character...not r terminated */
- return cur+2;
- }
- // Find next newline
- while (*cur != '' && *cur != 'r' && *cur != 'n') cur++;
- return *cur == '' ? NULL : cur;
- }
- /**
- * Reads a line from the AT channel, returns NULL on timeout.
- * Assumes it has exclusive read access to the FD
- *
- * This line is valid only until the next call to readline
- *
- * This function exists because as of writing, android libc does not
- * have buffered stdio.
- */
- static const char *readline()
- {
- ssize_t count;
- char *p_read = NULL;
- char *p_eol = NULL;
- char *ret;
- /* this is a little odd. I use *s_ATBufferCur == 0 to
- * mean "buffer consumed completely". If it points to a character, than
- * the buffer continues until a
- */
- if (*s_ATBufferCur == '') {
- /* empty buffer */
- s_ATBufferCur = s_ATBuffer;
- *s_ATBufferCur = '';
- p_read = s_ATBuffer;
- } else { /* *s_ATBufferCur != '' */
- /* there's data in the buffer from the last read */
- // skip over leading newlines
- while (*s_ATBufferCur == 'r' || *s_ATBufferCur == 'n')
- s_ATBufferCur++;
- p_eol = findNextEOL(s_ATBufferCur);
- if (p_eol == NULL) {
- /* a partial line. move it up and prepare to read more */
- size_t len;
- len = strlen(s_ATBufferCur);
- memmove(s_ATBuffer, s_ATBufferCur, len + 1);
- p_read = s_ATBuffer + len;
- s_ATBufferCur = s_ATBuffer;
- }
- /* Otherwise, (p_eol !- NULL) there is a complete line */
- /* that will be returned the while () loop below */
- }
- while (p_eol == NULL) {
- if (0 == MAX_AT_RESPONSE - (p_read - s_ATBuffer)) {
- LOGE("ERROR: Input line exceeded buffern");
- /* ditch buffer and start over again */
- s_ATBufferCur = s_ATBuffer;
- *s_ATBufferCur = '';
- p_read = s_ATBuffer;
- }
- do {
- count = read(s_fd, p_read,
- MAX_AT_RESPONSE - (p_read - s_ATBuffer));
- } while (count < 0 && errno == EINTR);
- if (count > 0) {
- AT_DUMP( "<< ", p_read, count );
- s_readCount += count;
- p_read[count] = '';
- // skip over leading newlines
- while (*s_ATBufferCur == 'r' || *s_ATBufferCur == 'n')
- s_ATBufferCur++;
- p_eol = findNextEOL(s_ATBufferCur);
- p_read += count;
- } else if (count <= 0) {
- /* read error encountered or EOF reached */
- if(count == 0) {
- LOGD("atchannel: EOF reached");
- } else {
- LOGD("atchannel: read error %s", strerror(errno));
- }
- return NULL;
- }
- }
- /* a full line in the buffer. Place a over the r and return */
- ret = s_ATBufferCur;
- *p_eol = '';
- s_ATBufferCur = p_eol + 1; /* this will always be <= p_read, */
- /* and there will be a at *p_read */
- LOGD("AT< %sn", ret);
- return ret;
- }
- static void onReaderClosed()
- {
- if (s_onReaderClosed != NULL && s_readerClosed == 0) {
- pthread_mutex_lock(&s_commandmutex);
- s_readerClosed = 1;
- pthread_cond_signal(&s_commandcond);
- pthread_mutex_unlock(&s_commandmutex);
- s_onReaderClosed();
- }
- }
- static void *readerLoop(void *arg)
- {
- for (;;) {
- const char * line;
- line = readline();
- if (line == NULL) {
- break;
- }
- if(isSMSUnsolicited(line)) {
- char *line1;
- const char *line2;
- // The scope of string returned by 'readline()' is valid only
- // till next call to 'readline()' hence making a copy of line
- // before calling readline again.
- line1 = strdup(line);
- line2 = readline();
- if (line2 == NULL) {
- break;
- }
- if (s_unsolHandler != NULL) {
- s_unsolHandler (line1, line2);
- }
- free(line1);
- } else {
- processLine(line);
- }
- #ifdef HAVE_ANDROID_OS
- if (s_ackPowerIoctl > 0) {
- /* acknowledge that bytes have been read and processed */
- ioctl(s_fd, OMAP_CSMI_TTY_ACK, &s_readCount);
- s_readCount = 0;
- }
- #endif /*HAVE_ANDROID_OS*/
- }
- onReaderClosed();
- return NULL;
- }
- /**
- * Sends string s to the radio with a r appended.
- * Returns AT_ERROR_* on error, 0 on success
- *
- * This function exists because as of writing, android libc does not
- * have buffered stdio.
- */
- static int writeline (const char *s)
- {
- size_t cur = 0;
- size_t len = strlen(s);
- ssize_t written;
- if (s_fd < 0 || s_readerClosed > 0) {
- return AT_ERROR_CHANNEL_CLOSED;
- }
- LOGD("AT> %sn", s);
- AT_DUMP( ">> ", s, strlen(s) );
- /* the main string */
- while (cur < len) {
- do {
- written = write (s_fd, s + cur, len - cur);
- } while (written < 0 && errno == EINTR);
- if (written < 0) {
- return AT_ERROR_GENERIC;
- }
- cur += written;
- }
- /* the r */
- do {
- written = write (s_fd, "r" , 1);
- } while ((written < 0 && errno == EINTR) || (written == 0));
- if (written < 0) {
- return AT_ERROR_GENERIC;
- }
- return 0;
- }
- static int writeCtrlZ (const char *s)
- {
- size_t cur = 0;
- size_t len = strlen(s);
- ssize_t written;
- if (s_fd < 0 || s_readerClosed > 0) {
- return AT_ERROR_CHANNEL_CLOSED;
- }
- LOGD("AT> %s^Zn", s);
- AT_DUMP( ">* ", s, strlen(s) );
- /* the main string */
- while (cur < len) {
- do {
- written = write (s_fd, s + cur, len - cur);
- } while (written < 0 && errno == EINTR);
- if (written < 0) {
- return AT_ERROR_GENERIC;
- }
- cur += written;
- }
- /* the ^Z */
- do {
- written = write (s_fd, "32" , 1);
- } while ((written < 0 && errno == EINTR) || (written == 0));
- if (written < 0) {
- return AT_ERROR_GENERIC;
- }
- return 0;
- }
- static void clearPendingCommand()
- {
- if (sp_response != NULL) {
- at_response_free(sp_response);
- }
- sp_response = NULL;
- s_responsePrefix = NULL;
- s_smsPDU = NULL;
- }
- /**
- * Starts AT handler on stream "fd'
- * returns 0 on success, -1 on error
- */
- int at_open(int fd, ATUnsolHandler h)
- {
- int ret;
- pthread_t tid;
- pthread_attr_t attr;
- s_fd = fd;
- s_unsolHandler = h;
- s_readerClosed = 0;
- s_responsePrefix = NULL;
- s_smsPDU = NULL;
- sp_response = NULL;
- /* Android power control ioctl */
- #ifdef HAVE_ANDROID_OS
- #ifdef OMAP_CSMI_POWER_CONTROL
- ret = ioctl(fd, OMAP_CSMI_TTY_ENABLE_ACK);
- if(ret == 0) {
- int ack_count;
- int read_count;
- int old_flags;
- char sync_buf[256];
- old_flags = fcntl(fd, F_GETFL, 0);
- fcntl(fd, F_SETFL, old_flags | O_NONBLOCK);
- do {
- ioctl(fd, OMAP_CSMI_TTY_READ_UNACKED, &ack_count);
- read_count = 0;
- do {
- ret = read(fd, sync_buf, sizeof(sync_buf));
- if(ret > 0)
- read_count += ret;
- } while(ret > 0 || (ret < 0 && errno == EINTR));
- ioctl(fd, OMAP_CSMI_TTY_ACK, &ack_count);
- } while(ack_count > 0 || read_count > 0);
- fcntl(fd, F_SETFL, old_flags);
- s_readCount = 0;
- s_ackPowerIoctl = 1;
- }
- else
- s_ackPowerIoctl = 0;
- #else // OMAP_CSMI_POWER_CONTROL
- s_ackPowerIoctl = 0;
- #endif // OMAP_CSMI_POWER_CONTROL
- #endif /*HAVE_ANDROID_OS*/
- pthread_attr_init (&attr);
- pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
- ret = pthread_create(&s_tid_reader, &attr, readerLoop, &attr);
- if (ret < 0) {
- perror ("pthread_create");
- return -1;
- }
- return 0;
- }
- /* FIXME is it ok to call this from the reader and the command thread? */
- void at_close()
- {
- if (s_fd >= 0) {
- close(s_fd);
- }
- s_fd = -1;
- pthread_mutex_lock(&s_commandmutex);
- s_readerClosed = 1;
- pthread_cond_signal(&s_commandcond);
- pthread_mutex_unlock(&s_commandmutex);
- /* the reader thread should eventually die */
- }
- static ATResponse * at_response_new()
- {
- return (ATResponse *) calloc(1, sizeof(ATResponse));
- }
- void at_response_free(ATResponse *p_response)
- {
- ATLine *p_line;
- if (p_response == NULL) return;
- p_line = p_response->p_intermediates;
- while (p_line != NULL) {
- ATLine *p_toFree;
- p_toFree = p_line;
- p_line = p_line->p_next;
- free(p_toFree->line);
- free(p_toFree);
- }
- free (p_response->finalResponse);
- free (p_response);
- }
- /**
- * The line reader places the intermediate responses in reverse order
- * here we flip them back
- */
- static void reverseIntermediates(ATResponse *p_response)
- {
- ATLine *pcur,*pnext;
- pcur = p_response->p_intermediates;
- p_response->p_intermediates = NULL;
- while (pcur != NULL) {
- pnext = pcur->p_next;
- pcur->p_next = p_response->p_intermediates;
- p_response->p_intermediates = pcur;
- pcur = pnext;
- }
- }
- /**
- * Internal send_command implementation
- * Doesn't lock or call the timeout callback
- *
- * timeoutMsec == 0 means infinite timeout
- */
- static int at_send_command_full_nolock (const char *command, ATCommandType type,
- const char *responsePrefix, const char *smspdu,
- long long timeoutMsec, ATResponse **pp_outResponse)
- {
- int err = 0;
- #ifndef USE_NP
- struct timespec ts;
- #endif /*USE_NP*/
- if(sp_response != NULL) {
- err = AT_ERROR_COMMAND_PENDING;
- goto error;
- }
- err = writeline (command);
- if (err < 0) {
- goto error;
- }
- s_type = type;
- s_responsePrefix = responsePrefix;
- s_smsPDU = smspdu;
- sp_response = at_response_new();
- #ifndef USE_NP
- if (timeoutMsec != 0) {
- setTimespecRelative(&ts, timeoutMsec);
- }
- #endif /*USE_NP*/
- while (sp_response->finalResponse == NULL && s_readerClosed == 0) {
- if (timeoutMsec != 0) {
- #ifdef USE_NP
- err = pthread_cond_timeout_np(&s_commandcond, &s_commandmutex, timeoutMsec);
- #else
- err = pthread_cond_timedwait(&s_commandcond, &s_commandmutex, &ts);
- #endif /*USE_NP*/
- } else {
- err = pthread_cond_wait(&s_commandcond, &s_commandmutex);
- }
- if (err == ETIMEDOUT) {
- err = AT_ERROR_TIMEOUT;
- goto error;
- }
- }
- if (pp_outResponse == NULL) {
- at_response_free(sp_response);
- } else {
- /* line reader stores intermediate responses in reverse order */
- reverseIntermediates(sp_response);
- *pp_outResponse = sp_response;
- }
- sp_response = NULL;
- if(s_readerClosed > 0) {
- err = AT_ERROR_CHANNEL_CLOSED;
- goto error;
- }
- err = 0;
- error:
- clearPendingCommand();
- return err;
- }
- /**
- * Internal send_command implementation
- *
- * timeoutMsec == 0 means infinite timeout
- */
- static int at_send_command_full (const char *command, ATCommandType type,
- const char *responsePrefix, const char *smspdu,
- long long timeoutMsec, ATResponse **pp_outResponse)
- {
- int err;
- if (0 != pthread_equal(s_tid_reader, pthread_self())) {
- /* cannot be called from reader thread */
- return AT_ERROR_INVALID_THREAD;
- }
- pthread_mutex_lock(&s_commandmutex);
- err = at_send_command_full_nolock(command, type,
- responsePrefix, smspdu,
- timeoutMsec, pp_outResponse);
- pthread_mutex_unlock(&s_commandmutex);
- if (err == AT_ERROR_TIMEOUT && s_onTimeout != NULL) {
- s_onTimeout();
- }
- return err;
- }
- /**
- * Issue a single normal AT command with no intermediate response expected
- *
- * "command" should not include r
- * pp_outResponse can be NULL
- *
- * if non-NULL, the resulting ATResponse * must be eventually freed with
- * at_response_free
- */
- int at_send_command (const char *command, ATResponse **pp_outResponse)
- {
- int err;
- err = at_send_command_full (command, NO_RESULT, NULL,
- NULL, 0, pp_outResponse);
- return err;
- }
- int at_send_command_singleline (const char *command,
- const char *responsePrefix,
- ATResponse **pp_outResponse)
- {
- int err;
- err = at_send_command_full (command, SINGLELINE, responsePrefix,
- NULL, 0, pp_outResponse);
- if (err == 0 && pp_outResponse != NULL
- && (*pp_outResponse)->success > 0
- && (*pp_outResponse)->p_intermediates == NULL
- ) {
- /* successful command must have an intermediate response */
- at_response_free(*pp_outResponse);
- *pp_outResponse = NULL;
- return AT_ERROR_INVALID_RESPONSE;
- }
- return err;
- }
- int at_send_command_numeric (const char *command,
- ATResponse **pp_outResponse)
- {
- int err;
- err = at_send_command_full (command, NUMERIC, NULL,
- NULL, 0, pp_outResponse);
- if (err == 0 && pp_outResponse != NULL
- && (*pp_outResponse)->success > 0
- && (*pp_outResponse)->p_intermediates == NULL
- ) {
- /* successful command must have an intermediate response */
- at_response_free(*pp_outResponse);
- *pp_outResponse = NULL;
- return AT_ERROR_INVALID_RESPONSE;
- }
- return err;
- }
- int at_send_command_sms (const char *command,
- const char *pdu,
- const char *responsePrefix,
- ATResponse **pp_outResponse)
- {
- int err;
- err = at_send_command_full (command, SINGLELINE, responsePrefix,
- pdu, 0, pp_outResponse);
- if (err == 0 && pp_outResponse != NULL
- && (*pp_outResponse)->success > 0
- && (*pp_outResponse)->p_intermediates == NULL
- ) {
- /* successful command must have an intermediate response */
- at_response_free(*pp_outResponse);
- *pp_outResponse = NULL;
- return AT_ERROR_INVALID_RESPONSE;
- }
- return err;
- }
- int at_send_command_multiline (const char *command,
- const char *responsePrefix,
- ATResponse **pp_outResponse)
- {
- int err;
- err = at_send_command_full (command, MULTILINE, responsePrefix,
- NULL, 0, pp_outResponse);
- return err;
- }
- /** This callback is invoked on the command thread */
- void at_set_on_timeout(void (*onTimeout)(void))
- {
- s_onTimeout = onTimeout;
- }
- /**
- * This callback is invoked on the reader thread (like ATUnsolHandler)
- * when the input stream closes before you call at_close
- * (not when you call at_close())
- * You should still call at_close()
- */
- void at_set_on_reader_closed(void (*onClose)(void))
- {
- s_onReaderClosed = onClose;
- }
- /**
- * Periodically issue an AT command and wait for a response.
- * Used to ensure channel has start up and is active
- */
- int at_handshake()
- {
- int i;
- int err = 0;
- if (0 != pthread_equal(s_tid_reader, pthread_self())) {
- /* cannot be called from reader thread */
- return AT_ERROR_INVALID_THREAD;
- }
- pthread_mutex_lock(&s_commandmutex);
- for (i = 0 ; i < HANDSHAKE_RETRY_COUNT ; i++) {
- /* some stacks start with verbose off */
- err = at_send_command_full_nolock ("ATE0Q0V1", NO_RESULT,
- NULL, NULL, HANDSHAKE_TIMEOUT_MSEC, NULL);
- if (err == 0) {
- break;
- }
- }
- if (err == 0) {
- /* pause for a bit to let the input buffer drain any unmatched OK's
- (they will appear as extraneous unsolicited responses) */
- sleepMsec(HANDSHAKE_TIMEOUT_MSEC);
- }
- pthread_mutex_unlock(&s_commandmutex);
- return err;
- }
- /**
- * Returns error code from response
- * Assumes AT+CMEE=1 (numeric) mode
- */
- AT_CME_Error at_get_cme_error(const ATResponse *p_response)
- {
- int ret;
- int err;
- char *p_cur;
- if (p_response->success > 0) {
- return CME_SUCCESS;
- }
- if (p_response->finalResponse == NULL
- || !strStartsWith(p_response->finalResponse, "+CME ERROR:")
- ) {
- return CME_ERROR_NON_CME;
- }
- p_cur = p_response->finalResponse;
- err = at_tok_start(&p_cur);
- if (err < 0) {
- return CME_ERROR_NON_CME;
- }
- err = at_tok_nextint(&p_cur, &ret);
- if (err < 0) {
- return CME_ERROR_NON_CME;
- }
- return (AT_CME_Error) ret;
- }