version 1.1.2.2, 2012/04/07 21:02:48
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version 1.1.2.4, 2012/05/08 09:07:31
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Line 46 SUCH DAMAGE.
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Line 46 SUCH DAMAGE.
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#include "global.h" |
#include "global.h" |
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/* |
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* mqtt_cli_Open() - Open client connection to MQTT broker |
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* |
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* @addr = brokers address |
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* @timeout = timeout |
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* return: NULL error or !=NULL connected to broker |
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*/ |
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mqtt_cli_t * |
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mqtt_cli_Open(struct sockaddr *addr, u_short timeout) |
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{ |
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mqtt_cli_t *cli; |
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if (!addr) |
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return NULL; |
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cli = malloc(sizeof(mqtt_cli_t)); |
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if (!cli) { |
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LOGERR; |
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return NULL; |
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} else |
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memset(cli, 0, sizeof(mqtt_cli_t)); |
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cli->timeout = timeout; |
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cli->sock = socket(addr->sa_family, SOCK_STREAM, IPPROTO_TCP); |
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if (cli->sock == -1) { |
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LOGERR; |
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free(cli); |
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return NULL; |
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} |
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if (connect(cli->sock, addr, addr->sa_len) == -1) { |
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LOGERR; |
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close(cli->sock); |
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free(cli); |
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return NULL; |
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} |
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cli->buf = mqtt_msgAlloc(USHRT_MAX); |
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if (!cli->buf) { |
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close(cli->sock); |
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free(cli); |
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return NULL; |
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} |
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return cli; |
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} |
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/* |
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* mqtt_cli_Close() - Close client connection |
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* |
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* @cli = connected client |
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* return: -1 error or 0 disconnected client and freed all resources |
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*/ |
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int |
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mqtt_cli_Close(mqtt_cli_t ** __restrict cli) |
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{ |
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int siz = 0; |
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if (!cli || !*cli) |
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return -1; |
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/* send disconnect */ |
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siz = mqtt_msgDISCONNECT((*cli)->buf); |
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if (siz > -1) { |
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siz = send((*cli)->sock, (*cli)->buf->msg_base, siz, MSG_NOSIGNAL); |
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if (siz > -1) |
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shutdown((*cli)->sock, SHUT_RDWR); |
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} |
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close((*cli)->sock); |
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mqtt_msgFree(&(*cli)->buf, 42); |
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free(*cli); |
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*cli = NULL; |
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return 0; |
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} |
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/* |
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* mqtt_cli_Subscribe() - Subscribe to broker |
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* |
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* @cli = connected client |
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* @Topics = Topics for subscribes |
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* @msgID = Message ID |
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* @Dup = Duplicated request |
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* @QoS = Message QoS |
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* return: NULL error or !=NULL allocated array with subscribed QoS responses, |
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* must be free() result! |
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*/ |
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u_char * |
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mqtt_cli_Subscribe(mqtt_cli_t * __restrict cli, mqtt_subscr_t * __restrict Topics, |
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u_short msgID, u_char Dup, u_char QoS) |
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{ |
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int siz = 0; |
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u_short mid = 0; |
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u_char *qoses = NULL; |
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if (!cli) |
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return NULL; |
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/* send subscribe */ |
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siz = mqtt_msgSUBSCRIBE(cli->buf, Topics, msgID, Dup, QoS); |
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if (siz == -1) |
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return NULL; |
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siz = send(cli->sock, cli->buf->msg_base, siz, MSG_NOSIGNAL); |
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if (siz == -1) { |
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LOGERR; |
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return NULL; |
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} |
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if ((siz = mqtt_wait4data(cli->sock, cli->timeout, POLLIN | POLLPRI)) == -1) { |
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return NULL; |
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} else if (siz && mqtt_KeepAlive(cli->sock, cli->timeout, 1)) |
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return NULL; |
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/* receive suback */ |
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siz = recv(cli->sock, cli->buf->msg_base, cli->buf->msg_len, 0); |
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if (siz == -1) { |
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LOGERR; |
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return NULL; |
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} |
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siz = mqtt_readSUBACK(cli->buf, &mid, &qoses); |
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if (siz == -1) |
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return NULL; |
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if (msgID != mid) { |
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free(qoses); |
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mqtt_SetErr(EBADMSG, "Receive different message ID %hu != %hu", msgID, mid); |
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return NULL; |
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} |
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return qoses; |
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} |