| /* |
| <:copyright-BRCM:2016:DUAL/GPL:standard |
| |
| Broadcom Proprietary and Confidential.(c) 2016 Broadcom |
| All Rights Reserved |
| |
| Unless you and Broadcom execute a separate written software license |
| agreement governing use of this software, this software is licensed |
| to you under the terms of the GNU General Public License version 2 |
| (the "GPL"), available at http://www.broadcom.com/licenses/GPLv2.php, |
| with the following added to such license: |
| |
| As a special exception, the copyright holders of this software give |
| you permission to link this software with independent modules, and |
| to copy and distribute the resulting executable under terms of your |
| choice, provided that you also meet, for each linked independent |
| module, the terms and conditions of the license of that module. |
| An independent module is a module which is not derived from this |
| software. The special exception does not apply to any modifications |
| of the software. |
| |
| Not withstanding the above, under no circumstances may you combine |
| this software in any way with any other Broadcom software provided |
| under a license other than the GPL, without Broadcom's express prior |
| written consent. |
| |
| :> |
| */ |
| |
| #include <bcmos_system.h> |
| |
| #include <sys/socket.h> |
| #include <sys/types.h> |
| #include <netinet/in.h> |
| |
| #include <bcmtr_plugin.h> |
| #include <bcm_config.h> |
| |
| /* Last seen host IP and port */ |
| static struct sockaddr_in peer_sa[BCMTR_MAX_OLTS]; |
| |
| /* This plugin stores both device id and per-device socket handle in |
| * transport's channel_id handle as |
| * (device_id << 24) | socket_handle. |
| * The following functions recover socket_handle and device_id from the channel_id handle |
| */ |
| |
| static inline int _bcmtr_channel_to_socket(bcmtr_plugin_channel ch) |
| { |
| return (int)(ch & 0xffffff); |
| } |
| |
| static inline int _bcmtr_channel_to_device(bcmtr_plugin_channel ch) |
| { |
| return (int)((ch >> 24) & 0xff); |
| } |
| |
| /** Open communication channel */ |
| static bcmos_errno bcmtr_udp_open(int device, bcmtr_plugin_cfg *cfg, bcmtr_plugin_channel *ch) |
| { |
| struct sockaddr_in sa = {}; |
| struct timeval timeout = { .tv_sec = 0, .tv_usec = BCMTR_MSG_TIMEOUT * 1000 }; |
| int s; |
| |
| s = socket(AF_INET, SOCK_DGRAM, 0); |
| if (s < 0) |
| { |
| BCMOS_TRACE_RETURN(BCM_ERR_COMM_FAIL, "Can't create UDP socket\n"); |
| } |
| |
| /* Bind local */ |
| sa.sin_family = AF_INET; |
| sa.sin_port = htons(cfg->x.udp.my_port); |
| sa.sin_addr.s_addr = INADDR_ANY; |
| if (bind(s, (struct sockaddr*)&sa, sizeof(sa) ) == -1) |
| { |
| close(s); |
| perror("bind"); |
| BCMOS_TRACE_RETURN(BCM_ERR_COMM_FAIL, "Can't bind UDP socket to %d.%d.%d.%d:%d\n", |
| (int)(cfg->x.udp.my_ip >> 24), (int)((cfg->x.udp.my_ip >> 16) & 0xff), |
| (int)((cfg->x.udp.my_ip >> 8) & 0xff), (int)(cfg->x.udp.my_ip & 0xff), |
| (int)cfg->x.udp.my_port); |
| } |
| bcmos_printf("%s: socket bound to port %d\n", __FUNCTION__, (int)cfg->x.udp.my_port); |
| |
| if (setsockopt(s, SOL_SOCKET, SO_SNDTIMEO, (char *)&timeout, sizeof(timeout)) < 0) |
| { |
| BCMOS_TRACE_RETURN(BCM_ERR_COMM_FAIL, "Can't set socket option for send timeout\n"); |
| } |
| |
| /* Connect to remote */ |
| if (cfg->x.udp.remote_port) |
| { |
| peer_sa[device].sin_family = AF_INET; |
| peer_sa[device].sin_port = htons(cfg->x.udp.remote_port); |
| peer_sa[device].sin_addr.s_addr = htonl(cfg->x.udp.remote_ip); |
| } |
| *ch = (device << 24) | s; |
| |
| return BCM_ERR_OK; |
| } |
| |
| /* print error message with throttling: not oftener than ones per second */ |
| static void _bcmtr_udp_print_err(bcmos_errno err, const char *err_msg) |
| { |
| static int nerrors; |
| static uint32_t last_timestamp; |
| |
| ++nerrors; |
| |
| if (!last_timestamp || bcmos_timestamp() - last_timestamp > 1000000) |
| { |
| BCMOS_TRACE_ERR("Error in low-level UDP transport. %s-%s. Errors since last report: %d\n", |
| err_msg, bcmos_strerror(err), nerrors); |
| last_timestamp = bcmos_timestamp(); |
| nerrors = 0; |
| } |
| } |
| |
| /** Close communication channel */ |
| static bcmos_errno bcmtr_udp_close(bcmtr_plugin_channel ch) |
| { |
| close(_bcmtr_channel_to_socket(ch)); |
| return BCM_ERR_OK; |
| } |
| |
| /** Send data */ |
| static bcmos_errno bcmtr_udp_send(bcmtr_plugin_channel ch, bcmolt_subchannel subch, bcmolt_buf *buf, |
| bcmtr_send_flags flags) |
| { |
| int sock = _bcmtr_channel_to_socket(ch); |
| int device = _bcmtr_channel_to_device(ch); |
| int buflen = bcmolt_buf_get_used(buf); |
| struct iovec iov = { .iov_base = buf->start, .iov_len = buflen }; |
| struct msghdr msg = { |
| .msg_iov = &iov, .msg_iovlen = 1, .msg_flags = 0, |
| .msg_name = (void *)&peer_sa[device], .msg_namelen = sizeof(peer_sa[0]) |
| }; |
| int len; |
| |
| len = sendmsg(sock, &msg, 0); |
| if (len < buflen) |
| { |
| bcmos_printf("%s: sock_sendmsg(%u) --> %d. errno=%d\n", __FUNCTION__, buflen, len, errno); |
| return BCM_ERR_COMM_FAIL; |
| } |
| |
| return BCM_ERR_OK; |
| } |
| |
| /** Receive data */ |
| static bcmos_errno bcmtr_udp_recv(bcmtr_plugin_channel ch, bcmolt_subchannel *subch, bcmolt_buf *buf) |
| { |
| int sock = _bcmtr_channel_to_socket(ch); |
| int device = _bcmtr_channel_to_device(ch); |
| struct iovec iov; |
| struct msghdr msg = { |
| .msg_iov = &iov, .msg_iovlen = 1, |
| .msg_name = (void *)&peer_sa[device], .msg_namelen = sizeof(peer_sa[0]) |
| }; |
| int len; |
| fd_set read_fds; |
| struct timeval tv; |
| bcmos_errno err; |
| int rc; |
| |
| FD_ZERO(&read_fds); |
| FD_SET(sock, &read_fds); |
| tv.tv_sec = 0; |
| tv.tv_usec = BCMTR_MSG_TIMEOUT * 1000; |
| |
| rc = select(sock + 1, &read_fds, NULL, NULL, &tv); |
| if (rc < 0) |
| { |
| perror("select"); |
| return BCM_ERR_COMM_FAIL; |
| } |
| if (!rc || !FD_ISSET(sock, &read_fds)) |
| { |
| return BCM_ERR_TIMEOUT; |
| } |
| |
| err = bcmolt_buf_alloc(buf, BCMTR_MAX_MTU_SIZE, BCMOLT_BUF_ENDIAN_FIXED); |
| if (err) |
| return BCM_ERR_NOMEM; |
| |
| iov.iov_base = buf->start; |
| iov.iov_len = BCMTR_MAX_MTU_SIZE; |
| len = recvmsg(sock, &msg, 0); |
| if (len <= 0) |
| { |
| _bcmtr_udp_print_err(BCM_ERR_COMM_FAIL, "recvmsg() failed\n"); |
| bcmolt_buf_free(buf); |
| return BCM_ERR_COMM_FAIL; |
| } |
| buf->len = len; |
| *subch = ntohs(peer_sa[device].sin_port); |
| |
| return BCM_ERR_OK; |
| } |
| |
| /** Initialize plugin callbacks |
| * \param[in,out] driver Transport plugin driver structure |
| * \return error code |
| */ |
| bcmos_errno bcmtr_plugin_init(bcmtr_plugin_cfg *cfg, bcmtr_driver *driver) |
| { |
| if (cfg->type != BCMTR_TYPE_UDP) |
| { |
| BCMOS_TRACE_RETURN(BCM_ERR_PARM, "Invalid plugin type. Expected UDP\n"); |
| } |
| |
| driver->open = bcmtr_udp_open; |
| driver->close = bcmtr_udp_close; |
| driver->recv = bcmtr_udp_recv; |
| driver->send = bcmtr_udp_send; |
| |
| return BCM_ERR_OK; |
| } |
| |