diff options
Diffstat (limited to 'src/plugins/serial/serial_basic.c')
| -rw-r--r-- | src/plugins/serial/serial_basic.c | 1029 |
1 files changed, 1029 insertions, 0 deletions
diff --git a/src/plugins/serial/serial_basic.c b/src/plugins/serial/serial_basic.c new file mode 100644 index 0000000..5f4b926 --- /dev/null +++ b/src/plugins/serial/serial_basic.c @@ -0,0 +1,1029 @@ +/* + * Copyright (c) 2012 Pigeon Point Systems. All Rights Reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistribution of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistribution in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * Neither the name of Pigeon Point Systems nor the names of + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * This software is provided "AS IS," without a warranty of any kind. + * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, + * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A + * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. + * PIGEON POINT SYSTEMS ("PPS") AND ITS LICENSORS SHALL NOT BE LIABLE + * FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING + * OR DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL + * PPS OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, + * OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR + * PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF + * LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, + * EVEN IF PPS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. + */ + +/* Serial Interface, Basic Mode plugin. */ + +#include <stdio.h> +#include <fcntl.h> +#include <time.h> +#include <unistd.h> +#include <sys/ioctl.h> +#include <errno.h> +#include <stdlib.h> +#include <string.h> +#include <ctype.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/poll.h> +#include <termios.h> + +#include <ipmitool/ipmi.h> +#include <ipmitool/ipmi_intf.h> +#include <ipmitool/helper.h> +#include <ipmitool/log.h> + +#if defined(HAVE_CONFIG_H) +# include <config.h> +#endif + +#define SERIAL_BM_MAX_MSG_SIZE 47 +#define SERIAL_BM_MAX_RQ_SIZE 33 /* 40 - 7 */ +#define SERIAL_BM_MAX_RS_SIZE 32 /* 40 - 8 */ +#define SERIAL_BM_TIMEOUT 5 +#define SERIAL_BM_RETRY_COUNT 5 +#define SERIAL_BM_MAX_BUFFER_SIZE 250 + +#define BM_START 0xA0 +#define BM_STOP 0xA5 +#define BM_HANDSHAKE 0xA6 +#define BM_ESCAPE 0xAA + +/* + * IPMB message header + */ +struct ipmb_msg_hdr { + unsigned char rsSA; + unsigned char netFn; /* NET FN | RS LUN */ + unsigned char csum1; + unsigned char rqSA; + unsigned char rqSeq; /* RQ SEQ | RQ LUN */ + unsigned char cmd; + unsigned char data[0]; +}; + +/* + * Send Message command request for IPMB-format + */ +struct ipmi_send_message_rq { + unsigned char channel; + struct ipmb_msg_hdr msg; +}; + +/* + * Get Message command response for IPMB-format + */ +struct ipmi_get_message_rp { + unsigned char completion; + unsigned char channel; + unsigned char netFn; + unsigned char csum1; + unsigned char rsSA; + unsigned char rqSeq; + unsigned char cmd; + unsigned char data[0]; +}; + +/* + * State for the received message + */ +enum { + MSG_NONE, + MSG_IN_PROGRESS, + MSG_DONE +}; + +/* + * Message parsing context + */ +struct serial_bm_parse_ctx{ + int state; + uint8_t * msg; + size_t msg_len; + size_t max_len; + int escape; +}; + +/* + * Receiving context + */ +struct serial_bm_recv_ctx { + char buffer[SERIAL_BM_MAX_BUFFER_SIZE]; + size_t buffer_size; + size_t max_buffer_size; +}; + +/* + * Sending context + */ +struct serial_bm_request_ctx { + uint8_t rsSA; + uint8_t netFn; + uint8_t rqSA; + uint8_t rqSeq; + uint8_t cmd; +}; + +/* + * Table of supported baud rates + */ +static const struct { + int baudinit; + int baudrate; +} rates[] = { + { B2400, 2400 }, + { B9600, 9600 }, + { B19200, 19200 }, + { B38400, 38400 }, + { B57600, 57600 }, + { B115200, 115200 }, + { B230400, 230400 }, +#ifdef B460800 + { B460800, 460800 }, +#endif +}; + +/* + * Table of special characters + */ +static const struct { + uint8_t character; + uint8_t escape; +} characters[] = { + { BM_START, 0xB0 }, /* start */ + { BM_STOP, 0xB5 }, /* stop */ + { BM_HANDSHAKE, 0xB6 }, /* packet handshake */ + { BM_ESCAPE, 0xBA }, /* data escape */ + { 0x1B, 0x3B } /* escape */ +}; + +static int is_system; + +/* + * Setup serial interface + */ +static int +serial_bm_setup(struct ipmi_intf * intf) +{ + intf->session = malloc(sizeof(struct ipmi_session)); + if (intf->session == NULL) { + lprintf(LOG_ERR, "ipmitool: malloc failure"); + return -1; + } + memset(intf->session, 0, sizeof(struct ipmi_session)); + + /* setup default LAN maximum request and response sizes */ + intf->max_request_data_size = SERIAL_BM_MAX_RQ_SIZE; + intf->max_response_data_size = SERIAL_BM_MAX_RS_SIZE; + return 0; +} + +/* + * Open serial interface + */ +static int +serial_bm_open(struct ipmi_intf * intf) +{ + struct termios ti; + unsigned int rate = 9600; + char *p; + int i; + + if (!intf->devfile) { + lprintf(LOG_ERR, "Serial device is not specified"); + return -1; + } + + is_system = 0; + + /* check if baud rate is specified */ + if ((p = strchr(intf->devfile, ':'))) { + char * pp; + + /* separate device name from baud rate */ + *p++ = '\0'; + + /* check for second colon */ + if ((pp = strchr(p, ':'))) { + /* this is needed to normally acquire baud rate */ + *pp++ = '\0'; + + /* check if it is a system interface */ + if (pp[0] == 'S' || pp[0] == 's') { + is_system = 1; + } + } + + if (str2uint(p, &rate)) { + lprintf(LOG_ERR, "Invalid baud rate specified\n"); + return -1; + } + } + + intf->fd = open(intf->devfile, O_RDWR | O_NONBLOCK, 0); + if (intf->fd < 0) { + lperror(LOG_ERR, "Could not open device at %s", intf->devfile); + return -1; + } + + for (i = 0; i < sizeof(rates) / sizeof(rates[0]); i++) { + if (rates[i].baudrate == rate) { + break; + } + } + if (i >= sizeof(rates) / sizeof(rates[0])) { + lprintf(LOG_ERR, "Unsupported baud rate %i specified", rate); + return -1; + } + + tcgetattr(intf->fd, &ti); + + cfsetispeed(&ti, rates[i].baudinit); + cfsetospeed(&ti, rates[i].baudinit); + + /* 8N1 */ + ti.c_cflag &= ~PARENB; + ti.c_cflag &= ~CSTOPB; + ti.c_cflag &= ~CSIZE; + ti.c_cflag |= CS8; + + /* enable the receiver and set local mode */ + ti.c_cflag |= (CLOCAL | CREAD); + + /* no flow control */ + ti.c_cflag &= ~CRTSCTS; + ti.c_iflag &= ~(IGNBRK | IGNCR | INLCR | ICRNL | INPCK | ISTRIP + | IXON | IXOFF | IXANY); +#ifdef IUCLC + /* Only disable uppercase-to-lowercase mapping on input for + platforms supporting the flag. */ + ti.c_iflag &= ~(IUCLC); +#endif + + + ti.c_oflag &= ~(OPOST); + ti.c_lflag &= ~(ICANON | ISIG | ECHO | ECHONL | NOFLSH); + + /* set the new options for the port with flushing */ + tcsetattr(intf->fd, TCSAFLUSH, &ti); + + if (intf->session->timeout == 0) + intf->session->timeout = SERIAL_BM_TIMEOUT; + if (intf->session->retry == 0) + intf->session->retry = SERIAL_BM_RETRY_COUNT; + + intf->opened = 1; + + return 0; +} + +/* + * Close serial interface + */ +static void +serial_bm_close(struct ipmi_intf * intf) +{ + if (intf->opened) { + close(intf->fd); + intf->fd = -1; + } + + if (intf->session) { + free(intf->session); + intf->session = NULL; + } + + intf->opened = 0; +} + +/* + * Allocate sequence number for tracking + */ +static uint8_t +serial_bm_alloc_seq(void) +{ + static uint8_t seq = 0; + if (++seq == 64) { + seq = 0; + } + return seq; +} + +/* + * Flush the buffers + */ +static int +serial_bm_flush(struct ipmi_intf * intf) +{ +#if defined(TCFLSH) + return ioctl(intf->fd, TCFLSH, TCIOFLUSH); +#elif defined(TIOCFLUSH) + return ioctl(intf->fd, TIOCFLUSH); +#else +# error "unsupported platform, missing flush support (TCFLSH/TIOCFLUSH)" +#endif +} + +/* + * Return escaped character for the given one + */ +static inline uint8_t +serial_bm_get_escaped_char(uint8_t c) +{ + int i; + + for (i = 0; i < 5; i++) { + if (characters[i].character == c) { + return characters[i].escape; + } + } + + return c; +} + +/* + * Return unescaped character for the given one + */ +static inline uint8_t +serial_bm_get_unescaped_char(uint8_t c) +{ + int i; + + for (i = 0; i < 5; i++) { + if (characters[i].escape == c) { + return characters[i].character; + } + } + + return c; +} + +/* + * Send message to serial port + */ +static int +serial_bm_send_msg(struct ipmi_intf * intf, uint8_t * msg, int msg_len) +{ + int i, size, tmp = 0; + uint8_t * buf, * data; + + if (verbose > 3) { + fprintf(stderr, "Sending request:\n"); + fprintf(stderr, " rsSA = 0x%x\n", msg[0]); + fprintf(stderr, " NetFN/rsLUN = 0x%x\n", msg[1]); + fprintf(stderr, " rqSA = 0x%x\n", msg[3]); + fprintf(stderr, " rqSeq/rqLUN = 0x%x\n", msg[4]); + fprintf(stderr, " cmd = 0x%x\n", msg[5]); + if (msg_len > 7) { + fprintf(stderr, " data_len = %d\n", msg_len - 7); + fprintf(stderr, " data = %s\n", + buf2str(msg + 6, msg_len - 7)); + } + } + + if (verbose > 4) { + fprintf(stderr, "Message data:\n"); + fprintf(stderr, " %s\n", buf2str(msg, msg_len)); + } + + /* calculate escaped characters number */ + for (i = 0; i < msg_len; i++) { + if (serial_bm_get_escaped_char(msg[i]) != msg[i]) { + tmp++; + } + } + + /* calculate required buffer size */ + size = msg_len + tmp + 2; + + /* allocate buffer for output data */ + buf = data = (uint8_t *) alloca(size); + + if (!buf) { + lperror(LOG_ERR, "ipmitool: alloca error"); + return -1; + } + + /* start character */ + *buf++ = 0xA0; + + for (i = 0; i < msg_len; i++) { + tmp = serial_bm_get_escaped_char(msg[i]); + if (tmp != msg[i]) { + *buf++ = 0xAA; + } + + *buf++ = tmp; + } + + /* stop character */ + *buf++ = 0xA5; + + if (verbose > 5) { + fprintf(stderr, "Sent serial data:\n %s\n", buf2str(data, size)); + } + + /* write data to serial port */ + tmp = write(intf->fd, data, size); + if (tmp <= 0) { + lperror(LOG_ERR, "ipmitool: write error"); + return -1; + } + + return 0; +} + +/* + * This function waits for incoming data + */ +static int +serial_bm_wait_for_data(struct ipmi_intf * intf) +{ + int n; + struct pollfd pfd; + + pfd.fd = intf->fd; + pfd.events = POLLIN; + pfd.revents = 0; + + n = poll(&pfd, 1, intf->session->timeout*1000); + if (n < 0) { + lperror(LOG_ERR, "Poll for serial data failed"); + return -1; + } else if (!n) { + return -1; + } + return 0; +} + +/* + * This function parses incoming data in basic mode format to IPMB message + */ +static int +serial_bm_parse_buffer(const uint8_t * data, int data_len, + struct serial_bm_parse_ctx * ctx) +{ + int i, tmp; + + for (i = 0; i < data_len; i++) { + /* check for start of new message */ + if (data[i] == BM_START) { + ctx->state = MSG_IN_PROGRESS; + ctx->escape = 0; + ctx->msg_len = 0; + /* check if message is not started */ + } else if (ctx->state != MSG_IN_PROGRESS) { + /* skip character */ + continue; + /* continue escape sequence */ + } else if (ctx->escape) { + /* get original character */ + tmp = serial_bm_get_unescaped_char(data[i]); + + /* check if not special character */ + if (tmp == data[i]) { + lprintf(LOG_ERR, "ipmitool: bad response"); + /* reset message state */ + ctx->state = MSG_NONE; + continue; + } + + /* check message length */ + if (ctx->msg_len >= ctx->max_len) { + lprintf(LOG_ERR, "ipmitool: response is too long"); + /* reset message state */ + ctx->state = MSG_NONE; + continue; + } + + /* add parsed character */ + ctx->msg[ctx->msg_len++] = tmp; + + /* clear escape flag */ + ctx->escape = 0; + /* check for escape character */ + } else if (data[i] == BM_ESCAPE) { + ctx->escape = 1; + continue; + /* check for stop character */ + } else if (data[i] == BM_STOP) { + ctx->state = MSG_DONE; + return i + 1; + /* check for packet handshake character */ + } else if (data[i] == BM_HANDSHAKE) { + /* just skip it */ + continue; + } else { + /* check message length */ + if (ctx->msg_len >= ctx->max_len) { + lprintf(LOG_ERR, "ipmitool: response is too long"); + return -1; + } + + /* add parsed character */ + ctx->msg[ctx->msg_len++] = data[i]; + } + } + + /* return number of parsed characters */ + return i; +} + +/* + * Read and parse data from serial port + */ +static int +serial_bm_recv_msg(struct ipmi_intf * intf, + struct serial_bm_recv_ctx * recv_ctx, + uint8_t * msg_data, size_t msg_len) +{ + struct serial_bm_parse_ctx parse_ctx; + int rv; + + parse_ctx.state = MSG_NONE; + parse_ctx.msg = msg_data; + parse_ctx.max_len = msg_len; + + do { + /* wait for data in the port */ + if (serial_bm_wait_for_data(intf)) { + return 0; + } + + /* read data into buffer */ + rv = read(intf->fd, recv_ctx->buffer + recv_ctx->buffer_size, + recv_ctx->max_buffer_size - recv_ctx->buffer_size); + + if (rv < 0) { + lperror(LOG_ERR, "ipmitool: read error"); + return -1; + } + + if (verbose > 5) { + fprintf(stderr, "Received serial data:\n %s\n", + buf2str(recv_ctx->buffer + recv_ctx->buffer_size, rv)); + } + + /* increment buffer size */ + recv_ctx->buffer_size += rv; + + /* parse buffer */ + rv = serial_bm_parse_buffer(recv_ctx->buffer, + recv_ctx->buffer_size, &parse_ctx); + + if (rv < recv_ctx->buffer_size) { + /* move non-parsed part of the buffer to the beginning */ + memmove(recv_ctx->buffer, recv_ctx->buffer + rv, + recv_ctx->buffer_size - rv); + } + + /* decrement buffer size */ + recv_ctx->buffer_size -= rv; + } while (parse_ctx.state != MSG_DONE); + + if (verbose > 4) { + printf("Received message:\n %s\n", + buf2str(msg_data, parse_ctx.msg_len)); + } + + /* received a message */ + return parse_ctx.msg_len; +} + +/* + * Build IPMB message to be transmitted + */ +static int +serial_bm_build_msg(const struct ipmi_intf * intf, + const struct ipmi_rq * req, uint8_t * msg, size_t max_len, + struct serial_bm_request_ctx * ctx, int * msg_len + ) +{ + uint8_t * data = msg, seq; + struct ipmb_msg_hdr * hdr = (struct ipmb_msg_hdr *) msg; + struct ipmi_send_message_rq * inner_rq = NULL, * outer_rq = NULL; + int bridging_level; + + /* acquire bridging level */ + if (intf->target_addr && intf->target_addr != intf->my_addr) { + if (intf->transit_addr != 0) { + bridging_level = 2; + } else { + bridging_level = 1; + } + } else { + bridging_level = 0; + } + + /* check overall packet length */ + if(req->msg.data_len + 7 + bridging_level * 8 > max_len) { + lprintf(LOG_ERR, "ipmitool: Message data is too long"); + return -1; + } + + /* allocate new sequence number */ + seq = serial_bm_alloc_seq() << 2; + + if (bridging_level) { + /* compose send message request */ + hdr->netFn = 0x18; + hdr->cmd = 0x34; + + /* set pointer to send message request data */ + outer_rq = (struct ipmi_send_message_rq *) (hdr + 1); + + /* compose the outer send message request */ + if (bridging_level == 2) { + outer_rq->channel = intf->transit_channel | 0x40; + outer_rq->msg.rsSA = intf->transit_addr; + outer_rq->msg.netFn = 0x18; + outer_rq->msg.csum1 = -(outer_rq->msg.rsSA + outer_rq->msg.netFn); + outer_rq->msg.rqSA = intf->my_addr; + outer_rq->msg.rqSeq = seq; + outer_rq->msg.cmd = 0x34; + + /* inner send message request is further */ + inner_rq = (outer_rq + 1); + } else { + /* there is only outer send message reuest */ + inner_rq = outer_rq; + } + + /* compose the inner send message request */ + inner_rq->channel = intf->target_channel | 0x40; + inner_rq->msg.rsSA = intf->target_addr; + inner_rq->msg.netFn = (req->msg.netfn << 2) | req->msg.lun; + inner_rq->msg.csum1 = -(inner_rq->msg.rsSA + inner_rq->msg.netFn); + inner_rq->msg.rqSA = intf->my_addr; + inner_rq->msg.rqSeq = seq; + inner_rq->msg.cmd = req->msg.cmd; + + /* check if interface is the system one */ + if (is_system) { + /* need response to LUN 2 */ + outer_rq->msg.rqSeq |= 2; + + /* do not track response */ + outer_rq->channel &= ~0x40; + + /* restore BMC SA if bridging not to primary IPMB channel */ + if (outer_rq->channel) { + outer_rq->msg.rqSA = IPMI_BMC_SLAVE_ADDR; + } + } + + /* fill-in the second context */ + ctx[1].rsSA = outer_rq->msg.rsSA; + ctx[1].netFn = outer_rq->msg.netFn; + ctx[1].rqSA = outer_rq->msg.rqSA; + ctx[1].rqSeq = outer_rq->msg.rqSeq; + ctx[1].cmd = outer_rq->msg.cmd; + + /* move write pointer */ + msg = (uint8_t *)(inner_rq + 1); + } else { + /* compose direct request */ + hdr->netFn = (req->msg.netfn << 2) | req->msg.lun; + hdr->cmd = req->msg.cmd; + + /* move write pointer */ + msg = (uint8_t *)(hdr + 1); + } + + /* fill-in the rest header fields */ + hdr->rsSA = IPMI_BMC_SLAVE_ADDR; + hdr->csum1 = -(hdr->rsSA + hdr->netFn); + hdr->rqSA = IPMI_REMOTE_SWID; + hdr->rqSeq = seq; + + /* fill-in the first context */ + ctx[0].rsSA = hdr->rsSA; + ctx[0].netFn = hdr->netFn; + ctx[0].rqSA = hdr->rqSA; + ctx[0].rqSeq = hdr->rqSeq; + ctx[0].cmd = hdr->cmd; + + /* write request data */ + memcpy(msg, req->msg.data, req->msg.data_len); + + /* move write pointer */ + msg += req->msg.data_len; + + if (bridging_level) { + /* write inner message checksum */ + *msg++ = ipmi_csum(&inner_rq->msg.rqSA, req->msg.data_len + 3); + + /* check for double bridging */ + if (bridging_level == 2) { + /* write outer message checksum */ + *msg++ = ipmi_csum(&outer_rq->msg.rqSA, 4); + } + + /* write overall message checksum */ + *msg++ = ipmi_csum(&hdr->rqSA, 4); + } else { + /* write overall message checksum */ + *msg++ = ipmi_csum(&hdr->rqSA, req->msg.data_len + 3); + } + + /* save message length */ + *msg_len = msg - data; + + /* return bridging level */ + return bridging_level; +} + +/* + * Wait for request response + */ +static int +serial_bm_wait_response(struct ipmi_intf * intf, + struct serial_bm_request_ctx * req_ctx, struct serial_bm_recv_ctx * read_ctx, + uint8_t * msg, size_t max_len) +{ + struct ipmb_msg_hdr * hdr = (struct ipmb_msg_hdr *) msg; + int msg_len, netFn, rqSeq; + + /* receive and match message */ + while ((msg_len = serial_bm_recv_msg(intf, read_ctx, msg, max_len)) > 0) { + /* validate message size */ + if (msg_len < 8) { + lprintf(LOG_ERR, "ipmitool: response is too short"); + continue; + } + + /* validate checksum 1 */ + if (ipmi_csum(msg, 3)) { + lprintf(LOG_ERR, "ipmitool: bad checksum 1"); + continue; + } + + /* validate checksum 2 */ + if (ipmi_csum(msg + 3, msg_len - 3)) { + lprintf(LOG_ERR, "ipmitool: bad checksum 2"); + continue; + } + + /* swap requester and responder LUNs */ + netFn = ((req_ctx->netFn|4) & ~3) | (req_ctx->rqSeq & 3); + rqSeq = (req_ctx->rqSeq & ~3) | (req_ctx->netFn & 3); + + /* check for the waited response */ + if (hdr->rsSA == req_ctx->rqSA + && hdr->netFn == netFn + && hdr->rqSA == req_ctx->rsSA + && hdr->rqSeq == rqSeq + && hdr->cmd == req_ctx->cmd) { + /* check if something new has been parsed */ + if (verbose > 3) { + fprintf(stderr, "Got response:\n"); + fprintf(stderr, " rsSA = 0x%x\n", msg[0]); + fprintf(stderr, " NetFN/rsLUN = 0x%x\n", msg[1]); + fprintf(stderr, " rqSA = 0x%x\n", msg[3]); + fprintf(stderr, " rqSeq/rqLUN = 0x%x\n", msg[4]); + fprintf(stderr, " cmd = 0x%x\n", msg[5]); + fprintf(stderr, " completion code = 0x%x\n", msg[6]); + if (msg_len > 8) { + fprintf(stderr, " data_len = %d\n", msg_len - 8); + fprintf(stderr, " data = %s\n", + buf2str(msg + 7, msg_len - 8)); + } + } + + /* copy only completion and response data */ + memmove(msg, hdr + 1, msg_len - sizeof (*hdr) - 1); + + /* update message length */ + msg_len -= sizeof (*hdr) + 1; + + /* the waited one */ + break; + } + } + + return msg_len; +} + +/* + * Get message from receive message queue + */ +static int +serial_bm_get_message(struct ipmi_intf * intf, + struct serial_bm_request_ctx * req_ctx, + struct serial_bm_recv_ctx * read_ctx, + uint8_t * msg, size_t max_len) +{ + uint8_t data[SERIAL_BM_MAX_MSG_SIZE]; + struct serial_bm_request_ctx tmp_ctx; + struct ipmi_get_message_rp * rp = (struct ipmi_get_message_rp *) data; + struct ipmb_msg_hdr * hdr = (struct ipmb_msg_hdr *) data; + clock_t start, tm; + int rv, netFn, rqSeq; + + start = clock(); + + do { + /* fill-in request context */ + tmp_ctx.rsSA = IPMI_BMC_SLAVE_ADDR; + tmp_ctx.netFn = 0x18; + tmp_ctx.rqSA = IPMI_REMOTE_SWID; + tmp_ctx.rqSeq = serial_bm_alloc_seq() << 2; + tmp_ctx.cmd = 0x33; + + /* fill-in request data */ + hdr->rsSA = tmp_ctx.rsSA; + hdr->netFn = tmp_ctx.netFn; + hdr->csum1 = ipmi_csum(data, 2); + hdr->rqSA = tmp_ctx.rqSA; + hdr->rqSeq = tmp_ctx.rqSeq; + hdr->cmd = tmp_ctx.cmd; + hdr->data[0] = ipmi_csum(&hdr->rqSA, 3); + + /* send request */ + serial_bm_flush(intf); + serial_bm_send_msg(intf, data, 7); + + /* wait for response */ + rv = serial_bm_wait_response(intf, &tmp_ctx, read_ctx, + data, sizeof (data)); + + /* check for IO error or timeout */ + if (rv <= 0) { + return rv; + } + + /* check completion code */ + if (rp->completion == 0) { + /* swap requester and responder LUNs */ + netFn = ((req_ctx->netFn|4) & ~3) | (req_ctx->rqSeq & 3); + rqSeq = (req_ctx->rqSeq & ~3) | (req_ctx->netFn & 3); + + /* check for the waited response */ + if (rp->netFn == netFn + && rp->rsSA == req_ctx->rsSA + && rp->rqSeq == rqSeq + && rp->cmd == req_ctx->cmd) { + /* copy the rest of message */ + memcpy(msg, rp->data, rv - sizeof (*rp) - 1); + return rv - sizeof (*rp) - 1; + } + } else if (rp->completion != 0x80) { + return 0; + } + + tm = clock() - start; + + tm /= CLOCKS_PER_SEC; + } while (tm < intf->session->timeout); + + return 0; +} + +static struct ipmi_rs * +serial_bm_send_request(struct ipmi_intf * intf, struct ipmi_rq * req) +{ + static struct ipmi_rs rsp; + uint8_t msg[SERIAL_BM_MAX_MSG_SIZE], * resp = msg; + struct serial_bm_request_ctx req_ctx[3]; + struct serial_bm_recv_ctx read_ctx; + int retry, rv, msg_len, bridging_level; + + if (!intf->opened && intf->open && intf->open(intf) < 0) { + return NULL; + } + + /* reset receive context */ + read_ctx.buffer_size = 0; + read_ctx.max_buffer_size = SERIAL_BM_MAX_BUFFER_SIZE; + + /* Send the message and receive the answer */ + for (retry = 0; retry < intf->session->retry; retry++) { + /* build output message */ + bridging_level = serial_bm_build_msg(intf, req, msg, + sizeof (msg), req_ctx, &msg_len); + if (msg_len < 0) { + return NULL; + } + + /* send request */ + serial_bm_flush(intf); + serial_bm_send_msg(intf, msg, msg_len); + + /* wait for response */ + rv = serial_bm_wait_response(intf, &req_ctx[0], + &read_ctx, msg, sizeof (msg)); + + /* check for IO error */ + if (rv < 0) { + return NULL; + } + + /* check for timeout */ + if (rv == 0) { + continue; + } + + /* check for bridging */ + if (bridging_level && msg[0] == 0) { + /* in the case of payload interface we check receive message queue */ + if (is_system) { + /* check message flags */ + rv = serial_bm_get_message(intf, &req_ctx[1], + &read_ctx, msg, sizeof (msg)); + + /* check for IO error */ + if (rv < 0) { + return NULL; + } + + /* check for timeout */ + if (rv == 0) { + continue; + } + /* check if response for inner request is not encapsulated */ + } else if (rv == 1) { + /* wait for response for inner request */ + rv = serial_bm_wait_response(intf, &req_ctx[0], + &read_ctx, msg, sizeof (msg)); + + /* check for IO error */ + if (rv < 0) { + return NULL; + } + + /* check for timeout */ + if (rv == 0) { + continue; + } + } else { + /* skip outer level header */ + resp = msg + 7; + /* decrement response size */ + rv -= 8; + } + + /* check response size */ + if (resp[0] == 0 && bridging_level == 2 && rv < 8) { + lprintf(LOG_ERR, "ipmitool: Message response is too short"); + /* invalid message length */ + return NULL; + } + } + + /* check for double bridging */ + if (bridging_level == 2 && resp[0] == 0) { + /* get completion code */ + rsp.ccode = resp[7]; + rsp.data_len = rv - 9; + memcpy(rsp.data, resp + 8, rsp.data_len); + } else { + rsp.ccode = resp[0]; + rsp.data_len = rv - 1; + memcpy(rsp.data, resp + 1, rsp.data_len); + } + + /* return response */ + return &rsp; + } + + /* no valid response */ + return NULL; +} + +int +serial_bm_set_my_addr(struct ipmi_intf * intf, uint8_t addr) +{ + intf->my_addr = addr; + return 0; +} + +/* + * Serial BM interface + */ +struct ipmi_intf ipmi_serial_bm_intf = { + name: "serial-basic", + desc: "Serial Interface, Basic Mode", + setup: serial_bm_setup, + open: serial_bm_open, + close: serial_bm_close, + sendrecv: serial_bm_send_request, + set_my_addr:serial_bm_set_my_addr +}; |