/* * RNDIS MSG parser * * Authors: Benedikt Spranger, Pengutronix * Robert Schwebel, Pengutronix * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2, as published by the Free Software Foundation. * * This software was originally developed in conformance with * Microsoft's Remote NDIS Specification License Agreement. * * 03/12/2004 Kai-Uwe Bloem * Fixed message length bug in init_response * * 03/25/2004 Kai-Uwe Bloem * Fixed rndis_rm_hdr length bug. * * Copyright (C) 2004 by David Brownell * updates to merge with Linux 2.6, better match RNDIS spec */ #include #include #include #include #include #include #include #include #include #undef RNDIS_PM #undef RNDIS_WAKEUP #undef VERBOSE #include "rndis.h" #define ETH_ALEN 6 /* Octets in one ethernet addr */ #define ETH_HLEN 14 /* Total octets in header. */ #define ETH_ZLEN 60 /* Min. octets in frame sans FCS */ #define ETH_DATA_LEN 1500 /* Max. octets in payload */ #define ETH_FRAME_LEN PKTSIZE_ALIGN /* Max. octets in frame sans FCS */ #define ENOTSUPP 524 /* Operation is not supported */ /* * The driver for your USB chip needs to support ep0 OUT to work with * RNDIS, plus all three CDC Ethernet endpoints (interrupt not optional). * * Windows hosts need an INF file like Documentation/usb/linux.inf * and will be happier if you provide the host_addr module parameter. */ #define RNDIS_MAX_CONFIGS 1 static rndis_params rndis_per_dev_params[RNDIS_MAX_CONFIGS]; /* Driver Version */ static const __le32 rndis_driver_version = __constant_cpu_to_le32(1); /* Function Prototypes */ static rndis_resp_t *rndis_add_response(int configNr, u32 length); /* supported OIDs */ static const u32 oid_supported_list[] = { /* the general stuff */ OID_GEN_SUPPORTED_LIST, OID_GEN_HARDWARE_STATUS, OID_GEN_MEDIA_SUPPORTED, OID_GEN_MEDIA_IN_USE, OID_GEN_MAXIMUM_FRAME_SIZE, OID_GEN_LINK_SPEED, OID_GEN_TRANSMIT_BLOCK_SIZE, OID_GEN_RECEIVE_BLOCK_SIZE, OID_GEN_VENDOR_ID, OID_GEN_VENDOR_DESCRIPTION, OID_GEN_VENDOR_DRIVER_VERSION, OID_GEN_CURRENT_PACKET_FILTER, OID_GEN_MAXIMUM_TOTAL_SIZE, OID_GEN_MEDIA_CONNECT_STATUS, OID_GEN_PHYSICAL_MEDIUM, #if 0 OID_GEN_RNDIS_CONFIG_PARAMETER, #endif /* the statistical stuff */ OID_GEN_XMIT_OK, OID_GEN_RCV_OK, OID_GEN_XMIT_ERROR, OID_GEN_RCV_ERROR, OID_GEN_RCV_NO_BUFFER, #ifdef RNDIS_OPTIONAL_STATS OID_GEN_DIRECTED_BYTES_XMIT, OID_GEN_DIRECTED_FRAMES_XMIT, OID_GEN_MULTICAST_BYTES_XMIT, OID_GEN_MULTICAST_FRAMES_XMIT, OID_GEN_BROADCAST_BYTES_XMIT, OID_GEN_BROADCAST_FRAMES_XMIT, OID_GEN_DIRECTED_BYTES_RCV, OID_GEN_DIRECTED_FRAMES_RCV, OID_GEN_MULTICAST_BYTES_RCV, OID_GEN_MULTICAST_FRAMES_RCV, OID_GEN_BROADCAST_BYTES_RCV, OID_GEN_BROADCAST_FRAMES_RCV, OID_GEN_RCV_CRC_ERROR, OID_GEN_TRANSMIT_QUEUE_LENGTH, #endif /* RNDIS_OPTIONAL_STATS */ /* mandatory 802.3 */ /* the general stuff */ OID_802_3_PERMANENT_ADDRESS, OID_802_3_CURRENT_ADDRESS, OID_802_3_MULTICAST_LIST, OID_802_3_MAC_OPTIONS, OID_802_3_MAXIMUM_LIST_SIZE, /* the statistical stuff */ OID_802_3_RCV_ERROR_ALIGNMENT, OID_802_3_XMIT_ONE_COLLISION, OID_802_3_XMIT_MORE_COLLISIONS, #ifdef RNDIS_OPTIONAL_STATS OID_802_3_XMIT_DEFERRED, OID_802_3_XMIT_MAX_COLLISIONS, OID_802_3_RCV_OVERRUN, OID_802_3_XMIT_UNDERRUN, OID_802_3_XMIT_HEARTBEAT_FAILURE, OID_802_3_XMIT_TIMES_CRS_LOST, OID_802_3_XMIT_LATE_COLLISIONS, #endif /* RNDIS_OPTIONAL_STATS */ #ifdef RNDIS_PM /* PM and wakeup are mandatory for USB: */ /* power management */ OID_PNP_CAPABILITIES, OID_PNP_QUERY_POWER, OID_PNP_SET_POWER, #ifdef RNDIS_WAKEUP /* wake up host */ OID_PNP_ENABLE_WAKE_UP, OID_PNP_ADD_WAKE_UP_PATTERN, OID_PNP_REMOVE_WAKE_UP_PATTERN, #endif /* RNDIS_WAKEUP */ #endif /* RNDIS_PM */ }; /* NDIS Functions */ static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf, unsigned buf_len, rndis_resp_t *r) { int retval = -ENOTSUPP; u32 length = 4; /* usually */ __le32 *outbuf; int i, count; rndis_query_cmplt_type *resp; rndis_params *params; if (!r) return -ENOMEM; resp = (rndis_query_cmplt_type *) r->buf; if (!resp) return -ENOMEM; #if defined(DEBUG) && defined(DEBUG_VERBOSE) if (buf_len) { debug("query OID %08x value, len %d:\n", OID, buf_len); for (i = 0; i < buf_len; i += 16) { debug("%03d: %08x %08x %08x %08x\n", i, get_unaligned_le32(&buf[i]), get_unaligned_le32(&buf[i + 4]), get_unaligned_le32(&buf[i + 8]), get_unaligned_le32(&buf[i + 12])); } } #endif /* response goes here, right after the header */ outbuf = (__le32 *) &resp[1]; resp->InformationBufferOffset = __constant_cpu_to_le32(16); params = &rndis_per_dev_params[configNr]; switch (OID) { /* general oids (table 4-1) */ /* mandatory */ case OID_GEN_SUPPORTED_LIST: debug("%s: OID_GEN_SUPPORTED_LIST\n", __func__); length = sizeof(oid_supported_list); count = length / sizeof(u32); for (i = 0; i < count; i++) outbuf[i] = cpu_to_le32(oid_supported_list[i]); retval = 0; break; /* mandatory */ case OID_GEN_HARDWARE_STATUS: debug("%s: OID_GEN_HARDWARE_STATUS\n", __func__); /* * Bogus question! * Hardware must be ready to receive high level protocols. * BTW: * reddite ergo quae sunt Caesaris Caesari * et quae sunt Dei Deo! */ *outbuf = __constant_cpu_to_le32(0); retval = 0; break; /* mandatory */ case OID_GEN_MEDIA_SUPPORTED: debug("%s: OID_GEN_MEDIA_SUPPORTED\n", __func__); *outbuf = cpu_to_le32(params->medium); retval = 0; break; /* mandatory */ case OID_GEN_MEDIA_IN_USE: debug("%s: OID_GEN_MEDIA_IN_USE\n", __func__); /* one medium, one transport... (maybe you do it better) */ *outbuf = cpu_to_le32(params->medium); retval = 0; break; /* mandatory */ case OID_GEN_MAXIMUM_FRAME_SIZE: debug("%s: OID_GEN_MAXIMUM_FRAME_SIZE\n", __func__); if (params->dev) { *outbuf = cpu_to_le32(params->mtu); retval = 0; } break; /* mandatory */ case OID_GEN_LINK_SPEED: #if defined(DEBUG) && defined(DEBUG_VERBOSE) debug("%s: OID_GEN_LINK_SPEED\n", __func__); #endif if (params->media_state == NDIS_MEDIA_STATE_DISCONNECTED) *outbuf = __constant_cpu_to_le32(0); else *outbuf = cpu_to_le32(params->speed); retval = 0; break; /* mandatory */ case OID_GEN_TRANSMIT_BLOCK_SIZE: debug("%s: OID_GEN_TRANSMIT_BLOCK_SIZE\n", __func__); if (params->dev) { *outbuf = cpu_to_le32(params->mtu); retval = 0; } break; /* mandatory */ case OID_GEN_RECEIVE_BLOCK_SIZE: debug("%s: OID_GEN_RECEIVE_BLOCK_SIZE\n", __func__); if (params->dev) { *outbuf = cpu_to_le32(params->mtu); retval = 0; } break; /* mandatory */ case OID_GEN_VENDOR_ID: debug("%s: OID_GEN_VENDOR_ID\n", __func__); *outbuf = cpu_to_le32(params->vendorID); retval = 0; break; /* mandatory */ case OID_GEN_VENDOR_DESCRIPTION: debug("%s: OID_GEN_VENDOR_DESCRIPTION\n", __func__); length = strlen(params->vendorDescr); memcpy(outbuf, params->vendorDescr, length); retval = 0; break; case OID_GEN_VENDOR_DRIVER_VERSION: debug("%s: OID_GEN_VENDOR_DRIVER_VERSION\n", __func__); /* Created as LE */ *outbuf = rndis_driver_version; retval = 0; break; /* mandatory */ case OID_GEN_CURRENT_PACKET_FILTER: debug("%s: OID_GEN_CURRENT_PACKET_FILTER\n", __func__); *outbuf = cpu_to_le32(*params->filter); retval = 0; break; /* mandatory */ case OID_GEN_MAXIMUM_TOTAL_SIZE: debug("%s: OID_GEN_MAXIMUM_TOTAL_SIZE\n", __func__); *outbuf = __constant_cpu_to_le32(RNDIS_MAX_TOTAL_SIZE); retval = 0; break; /* mandatory */ case OID_GEN_MEDIA_CONNECT_STATUS: #if defined(DEBUG) && defined(DEBUG_VERBOSE) debug("%s: OID_GEN_MEDIA_CONNECT_STATUS\n", __func__); #endif *outbuf = cpu_to_le32(params->media_state); retval = 0; break; case OID_GEN_PHYSICAL_MEDIUM: debug("%s: OID_GEN_PHYSICAL_MEDIUM\n", __func__); *outbuf = __constant_cpu_to_le32(0); retval = 0; break; /* * The RNDIS specification is incomplete/wrong. Some versions * of MS-Windows expect OIDs that aren't specified there. Other * versions emit undefined RNDIS messages. DOCUMENT ALL THESE! */ case OID_GEN_MAC_OPTIONS: /* from WinME */ debug("%s: OID_GEN_MAC_OPTIONS\n", __func__); *outbuf = __constant_cpu_to_le32( NDIS_MAC_OPTION_RECEIVE_SERIALIZED | NDIS_MAC_OPTION_FULL_DUPLEX); retval = 0; break; /* statistics OIDs (table 4-2) */ /* mandatory */ case OID_GEN_XMIT_OK: #if defined(DEBUG) && defined(DEBUG_VERBOSE) debug("%s: OID_GEN_XMIT_OK\n", __func__); #endif if (params->stats) { *outbuf = cpu_to_le32( params->stats->tx_packets - params->stats->tx_errors - params->stats->tx_dropped); retval = 0; } break; /* mandatory */ case OID_GEN_RCV_OK: #if defined(DEBUG) && defined(DEBUG_VERBOSE) debug("%s: OID_GEN_RCV_OK\n", __func__); #endif if (params->stats) { *outbuf = cpu_to_le32( params->stats->rx_packets - params->stats->rx_errors - params->stats->rx_dropped); retval = 0; } break; /* mandatory */ case OID_GEN_XMIT_ERROR: #if defined(DEBUG) && defined(DEBUG_VERBOSE) debug("%s: OID_GEN_XMIT_ERROR\n", __func__); #endif if (params->stats) { *outbuf = cpu_to_le32(params->stats->tx_errors); retval = 0; } break; /* mandatory */ case OID_GEN_RCV_ERROR: #if defined(DEBUG) && defined(DEBUG_VERBOSE) debug("%s: OID_GEN_RCV_ERROR\n", __func__); #endif if (params->stats) { *outbuf = cpu_to_le32(params->stats->rx_errors); retval = 0; } break; /* mandatory */ case OID_GEN_RCV_NO_BUFFER: debug("%s: OID_GEN_RCV_NO_BUFFER\n", __func__); if (params->stats) { *outbuf = cpu_to_le32(params->stats->rx_dropped); retval = 0; } break; #ifdef RNDIS_OPTIONAL_STATS case OID_GEN_DIRECTED_BYTES_XMIT: debug("%s: OID_GEN_DIRECTED_BYTES_XMIT\n", __func__); /* * Aunt Tilly's size of shoes * minus antarctica count of penguins * divided by weight of Alpha Centauri */ if (params->stats) { *outbuf = cpu_to_le32( (params->stats->tx_packets - params->stats->tx_errors - params->stats->tx_dropped) * 123); retval = 0; } break; case OID_GEN_DIRECTED_FRAMES_XMIT: debug("%s: OID_GEN_DIRECTED_FRAMES_XMIT\n", __func__); /* dito */ if (params->stats) { *outbuf = cpu_to_le32( (params->stats->tx_packets - params->stats->tx_errors - params->stats->tx_dropped) / 123); retval = 0; } break; case OID_GEN_MULTICAST_BYTES_XMIT: debug("%s: OID_GEN_MULTICAST_BYTES_XMIT\n", __func__); if (params->stats) { *outbuf = cpu_to_le32(params->stats->multicast * 1234); retval = 0; } break; case OID_GEN_MULTICAST_FRAMES_XMIT: debug("%s: OID_GEN_MULTICAST_FRAMES_XMIT\n", __func__); if (params->stats) { *outbuf = cpu_to_le32(params->stats->multicast); retval = 0; } break; case OID_GEN_BROADCAST_BYTES_XMIT: debug("%s: OID_GEN_BROADCAST_BYTES_XMIT\n", __func__); if (params->stats) { *outbuf = cpu_to_le32(params->stats->tx_packets/42*255); retval = 0; } break; case OID_GEN_BROADCAST_FRAMES_XMIT: debug("%s: OID_GEN_BROADCAST_FRAMES_XMIT\n", __func__); if (params->stats) { *outbuf = cpu_to_le32(params->stats->tx_packets / 42); retval = 0; } break; case OID_GEN_DIRECTED_BYTES_RCV: debug("%s: OID_GEN_DIRECTED_BYTES_RCV\n", __func__); *outbuf = __constant_cpu_to_le32(0); retval = 0; break; case OID_GEN_DIRECTED_FRAMES_RCV: debug("%s: OID_GEN_DIRECTED_FRAMES_RCV\n", __func__); *outbuf = __constant_cpu_to_le32(0); retval = 0; break; case OID_GEN_MULTICAST_BYTES_RCV: debug("%s: OID_GEN_MULTICAST_BYTES_RCV\n", __func__); if (params->stats) { *outbuf = cpu_to_le32(params->stats->multicast * 1111); retval = 0; } break; case OID_GEN_MULTICAST_FRAMES_RCV: debug("%s: OID_GEN_MULTICAST_FRAMES_RCV\n", __func__); if (params->stats) { *outbuf = cpu_to_le32(params->stats->multicast); retval = 0; } break; case OID_GEN_BROADCAST_BYTES_RCV: debug("%s: OID_GEN_BROADCAST_BYTES_RCV\n", __func__); if (params->stats) { *outbuf = cpu_to_le32(params->stats->rx_packets/42*255); retval = 0; } break; case OID_GEN_BROADCAST_FRAMES_RCV: debug("%s: OID_GEN_BROADCAST_FRAMES_RCV\n", __func__); if (params->stats) { *outbuf = cpu_to_le32(params->stats->rx_packets / 42); retval = 0; } break; case OID_GEN_RCV_CRC_ERROR: debug("%s: OID_GEN_RCV_CRC_ERROR\n", __func__); if (params->stats) { *outbuf = cpu_to_le32(params->stats->rx_crc_errors); retval = 0; } break; case OID_GEN_TRANSMIT_QUEUE_LENGTH: debug("%s: OID_GEN_TRANSMIT_QUEUE_LENGTH\n", __func__); *outbuf = __constant_cpu_to_le32(0); retval = 0; break; #endif /* RNDIS_OPTIONAL_STATS */ /* ieee802.3 OIDs (table 4-3) */ /* mandatory */ case OID_802_3_PERMANENT_ADDRESS: debug("%s: OID_802_3_PERMANENT_ADDRESS\n", __func__); if (params->dev) { length = ETH_ALEN; memcpy(outbuf, params->host_mac, length); retval = 0; } break; /* mandatory */ case OID_802_3_CURRENT_ADDRESS: debug("%s: OID_802_3_CURRENT_ADDRESS\n", __func__); if (params->dev) { length = ETH_ALEN; memcpy(outbuf, params->host_mac, length); retval = 0; } break; /* mandatory */ case OID_802_3_MULTICAST_LIST: debug("%s: OID_802_3_MULTICAST_LIST\n", __func__); /* Multicast base address only */ *outbuf = __constant_cpu_to_le32(0xE0000000); retval = 0; break; /* mandatory */ case OID_802_3_MAXIMUM_LIST_SIZE: debug("%s: OID_802_3_MAXIMUM_LIST_SIZE\n", __func__); /* Multicast base address only */ *outbuf = __constant_cpu_to_le32(1); retval = 0; break; case OID_802_3_MAC_OPTIONS: debug("%s: OID_802_3_MAC_OPTIONS\n", __func__); break; /* ieee802.3 statistics OIDs (table 4-4) */ /* mandatory */ case OID_802_3_RCV_ERROR_ALIGNMENT: debug("%s: OID_802_3_RCV_ERROR_ALIGNMENT\n", __func__); if (params->stats) { *outbuf = cpu_to_le32(params->stats->rx_frame_errors); retval = 0; } break; /* mandatory */ case OID_802_3_XMIT_ONE_COLLISION: debug("%s: OID_802_3_XMIT_ONE_COLLISION\n", __func__); *outbuf = __constant_cpu_to_le32(0); retval = 0; break; /* mandatory */ case OID_802_3_XMIT_MORE_COLLISIONS: debug("%s: OID_802_3_XMIT_MORE_COLLISIONS\n", __func__); *outbuf = __constant_cpu_to_le32(0); retval = 0; break; #ifdef RNDIS_OPTIONAL_STATS case OID_802_3_XMIT_DEFERRED: debug("%s: OID_802_3_XMIT_DEFERRED\n", __func__); /* TODO */ break; case OID_802_3_XMIT_MAX_COLLISIONS: debug("%s: OID_802_3_XMIT_MAX_COLLISIONS\n", __func__); /* TODO */ break; case OID_802_3_RCV_OVERRUN: debug("%s: OID_802_3_RCV_OVERRUN\n", __func__); /* TODO */ break; case OID_802_3_XMIT_UNDERRUN: debug("%s: OID_802_3_XMIT_UNDERRUN\n", __func__); /* TODO */ break; case OID_802_3_XMIT_HEARTBEAT_FAILURE: debug("%s: OID_802_3_XMIT_HEARTBEAT_FAILURE\n", __func__); /* TODO */ break; case OID_802_3_XMIT_TIMES_CRS_LOST: debug("%s: OID_802_3_XMIT_TIMES_CRS_LOST\n", __func__); /* TODO */ break; case OID_802_3_XMIT_LATE_COLLISIONS: debug("%s: OID_802_3_XMIT_LATE_COLLISIONS\n", __func__); /* TODO */ break; #endif /* RNDIS_OPTIONAL_STATS */ #ifdef RNDIS_PM /* power management OIDs (table 4-5) */ case OID_PNP_CAPABILITIES: debug("%s: OID_PNP_CAPABILITIES\n", __func__); /* for now, no wakeup capabilities */ length = sizeof(struct NDIS_PNP_CAPABILITIES); memset(outbuf, 0, length); retval = 0; break; case OID_PNP_QUERY_POWER: debug("%s: OID_PNP_QUERY_POWER D%d\n", __func__, get_unaligned_le32(buf) - 1); /* * only suspend is a real power state, and * it can't be entered by OID_PNP_SET_POWER... */ length = 0; retval = 0; break; #endif default: debug("%s: query unknown OID 0x%08X\n", __func__, OID); } if (retval < 0) length = 0; resp->InformationBufferLength = cpu_to_le32(length); r->length = length + sizeof *resp; resp->MessageLength = cpu_to_le32(r->length); return retval; } static int gen_ndis_set_resp(u8 configNr, u32 OID, u8 *buf, u32 buf_len, rndis_resp_t *r) { rndis_set_cmplt_type *resp; int retval = -ENOTSUPP; struct rndis_params *params; #if (defined(DEBUG) && defined(DEBUG_VERBOSE)) || defined(RNDIS_PM) int i; #endif if (!r) return -ENOMEM; resp = (rndis_set_cmplt_type *) r->buf; if (!resp) return -ENOMEM; #if defined(DEBUG) && defined(DEBUG_VERBOSE) if (buf_len) { debug("set OID %08x value, len %d:\n", OID, buf_len); for (i = 0; i < buf_len; i += 16) { debug("%03d: %08x %08x %08x %08x\n", i, get_unaligned_le32(&buf[i]), get_unaligned_le32(&buf[i + 4]), get_unaligned_le32(&buf[i + 8]), get_unaligned_le32(&buf[i + 12])); } } #endif params = &rndis_per_dev_params[configNr]; switch (OID) { case OID_GEN_CURRENT_PACKET_FILTER: /* * these NDIS_PACKET_TYPE_* bitflags are shared with * cdc_filter; it's not RNDIS-specific * NDIS_PACKET_TYPE_x == USB_CDC_PACKET_TYPE_x for x in: * PROMISCUOUS, DIRECTED, * MULTICAST, ALL_MULTICAST, BROADCAST */ *params->filter = (u16) get_unaligned_le32(buf); debug("%s: OID_GEN_CURRENT_PACKET_FILTER %08x\n", __func__, *params->filter); /* * this call has a significant side effect: it's * what makes the packet flow start and stop, like * activating the CDC Ethernet altsetting. */ #ifdef RNDIS_PM update_linkstate: #endif retval = 0; if (*params->filter) params->state = RNDIS_DATA_INITIALIZED; else params->state = RNDIS_INITIALIZED; break; case OID_802_3_MULTICAST_LIST: /* I think we can ignore this */ debug("%s: OID_802_3_MULTICAST_LIST\n", __func__); retval = 0; break; #if 0 case OID_GEN_RNDIS_CONFIG_PARAMETER: { struct rndis_config_parameter *param; param = (struct rndis_config_parameter *) buf; debug("%s: OID_GEN_RNDIS_CONFIG_PARAMETER '%*s'\n", __func__, min(cpu_to_le32(param->ParameterNameLength), 80), buf + param->ParameterNameOffset); retval = 0; } break; #endif #ifdef RNDIS_PM case OID_PNP_SET_POWER: /* * The only real power state is USB suspend, and RNDIS requests * can't enter it; this one isn't really about power. After * resuming, Windows forces a reset, and then SET_POWER D0. * FIXME ... then things go batty; Windows wedges itself. */ i = get_unaligned_le32(buf); debug("%s: OID_PNP_SET_POWER D%d\n", __func__, i - 1); switch (i) { case NdisDeviceStateD0: *params->filter = params->saved_filter; goto update_linkstate; case NdisDeviceStateD3: case NdisDeviceStateD2: case NdisDeviceStateD1: params->saved_filter = *params->filter; retval = 0; break; } break; #ifdef RNDIS_WAKEUP /* * no wakeup support advertised, so wakeup OIDs always fail: * - OID_PNP_ENABLE_WAKE_UP * - OID_PNP_{ADD,REMOVE}_WAKE_UP_PATTERN */ #endif #endif /* RNDIS_PM */ default: debug("%s: set unknown OID 0x%08X, size %d\n", __func__, OID, buf_len); } return retval; } /* * Response Functions */ static int rndis_init_response(int configNr, rndis_init_msg_type *buf) { rndis_init_cmplt_type *resp; rndis_resp_t *r; if (!rndis_per_dev_params[configNr].dev) return -ENOTSUPP; r = rndis_add_response(configNr, sizeof(rndis_init_cmplt_type)); if (!r) return -ENOMEM; resp = (rndis_init_cmplt_type *) r->buf; resp->MessageType = __constant_cpu_to_le32( REMOTE_NDIS_INITIALIZE_CMPLT); resp->MessageLength = __constant_cpu_to_le32(52); resp->RequestID = get_unaligned(&buf->RequestID); /* Still LE in msg buffer */ resp->Status = __constant_cpu_to_le32(RNDIS_STATUS_SUCCESS); resp->MajorVersion = __constant_cpu_to_le32(RNDIS_MAJOR_VERSION); resp->MinorVersion = __constant_cpu_to_le32(RNDIS_MINOR_VERSION); resp->DeviceFlags = __constant_cpu_to_le32(RNDIS_DF_CONNECTIONLESS); resp->Medium = __constant_cpu_to_le32(RNDIS_MEDIUM_802_3); resp->MaxPacketsPerTransfer = __constant_cpu_to_le32(1); resp->MaxTransferSize = cpu_to_le32( rndis_per_dev_params[configNr].mtu + ETHER_HDR_SIZE + sizeof(struct rndis_packet_msg_type) + 22); resp->PacketAlignmentFactor = __constant_cpu_to_le32(0); resp->AFListOffset = __constant_cpu_to_le32(0); resp->AFListSize = __constant_cpu_to_le32(0); if (rndis_per_dev_params[configNr].ack) rndis_per_dev_params[configNr].ack( rndis_per_dev_params[configNr].dev); return 0; } static int rndis_query_response(int configNr, rndis_query_msg_type *buf) { rndis_query_cmplt_type *resp; rndis_resp_t *r; debug("%s: OID = %08X\n", __func__, get_unaligned_le32(&buf->OID)); if (!rndis_per_dev_params[configNr].dev) return -ENOTSUPP; /* * we need more memory: * gen_ndis_query_resp expects enough space for * rndis_query_cmplt_type followed by data. * oid_supported_list is the largest data reply */ r = rndis_add_response(configNr, sizeof(oid_supported_list) + sizeof(rndis_query_cmplt_type)); if (!r) return -ENOMEM; resp = (rndis_query_cmplt_type *) r->buf; resp->MessageType = __constant_cpu_to_le32(REMOTE_NDIS_QUERY_CMPLT); resp->RequestID = get_unaligned(&buf->RequestID); /* Still LE in msg buffer */ if (gen_ndis_query_resp(configNr, get_unaligned_le32(&buf->OID), get_unaligned_le32(&buf->InformationBufferOffset) + 8 + (u8 *) buf, get_unaligned_le32(&buf->InformationBufferLength), r)) { /* OID not supported */ resp->Status = __constant_cpu_to_le32( RNDIS_STATUS_NOT_SUPPORTED); resp->MessageLength = __constant_cpu_to_le32(sizeof *resp); resp->InformationBufferLength = __constant_cpu_to_le32(0); resp->InformationBufferOffset = __constant_cpu_to_le32(0); } else resp->Status = __constant_cpu_to_le32(RNDIS_STATUS_SUCCESS); if (rndis_per_dev_params[configNr].ack) rndis_per_dev_params[configNr].ack( rndis_per_dev_params[configNr].dev); return 0; } static int rndis_set_response(int configNr, rndis_set_msg_type *buf) { u32 BufLength, BufOffset; rndis_set_cmplt_type *resp; rndis_resp_t *r; r = rndis_add_response(configNr, sizeof(rndis_set_cmplt_type)); if (!r) return -ENOMEM; resp = (rndis_set_cmplt_type *) r->buf; BufLength = get_unaligned_le32(&buf->InformationBufferLength); BufOffset = get_unaligned_le32(&buf->InformationBufferOffset); #ifdef VERBOSE debug("%s: Length: %d\n", __func__, BufLength); debug("%s: Offset: %d\n", __func__, BufOffset); debug("%s: InfoBuffer: ", __func__); for (i = 0; i < BufLength; i++) debug("%02x ", *(((u8 *) buf) + i + 8 + BufOffset)); debug("\n"); #endif resp->MessageType = __constant_cpu_to_le32(REMOTE_NDIS_SET_CMPLT); resp->MessageLength = __constant_cpu_to_le32(16); resp->RequestID = get_unaligned(&buf->RequestID); /* Still LE in msg buffer */ if (gen_ndis_set_resp(configNr, get_unaligned_le32(&buf->OID), ((u8 *) buf) + 8 + BufOffset, BufLength, r)) resp->Status = __constant_cpu_to_le32( RNDIS_STATUS_NOT_SUPPORTED); else resp->Status = __constant_cpu_to_le32(RNDIS_STATUS_SUCCESS); if (rndis_per_dev_params[configNr].ack) rndis_per_dev_params[configNr].ack( rndis_per_dev_params[configNr].dev); return 0; } static int rndis_reset_response(int configNr, rndis_reset_msg_type *buf) { rndis_reset_cmplt_type *resp; rndis_resp_t *r; r = rndis_add_response(configNr, sizeof(rndis_reset_cmplt_type)); if (!r) return -ENOMEM; resp = (rndis_reset_cmplt_type *) r->buf; resp->MessageType = __constant_cpu_to_le32(REMOTE_NDIS_RESET_CMPLT); resp->MessageLength = __constant_cpu_to_le32(16); resp->Status = __constant_cpu_to_le32(RNDIS_STATUS_SUCCESS); /* resent information */ resp->AddressingReset = __constant_cpu_to_le32(1); if (rndis_per_dev_params[configNr].ack) rndis_per_dev_params[configNr].ack( rndis_per_dev_params[configNr].dev); return 0; } static int rndis_keepalive_response(int configNr, rndis_keepalive_msg_type *buf) { rndis_keepalive_cmplt_type *resp; rndis_resp_t *r; /* host "should" check only in RNDIS_DATA_INITIALIZED state */ r = rndis_add_response(configNr, sizeof(rndis_keepalive_cmplt_type)); if (!r) return -ENOMEM; resp = (rndis_keepalive_cmplt_type *) r->buf; resp->MessageType = __constant_cpu_to_le32( REMOTE_NDIS_KEEPALIVE_CMPLT); resp->MessageLength = __constant_cpu_to_le32(16); resp->RequestID = get_unaligned(&buf->RequestID); /* Still LE in msg buffer */ resp->Status = __constant_cpu_to_le32(RNDIS_STATUS_SUCCESS); if (rndis_per_dev_params[configNr].ack) rndis_per_dev_params[configNr].ack( rndis_per_dev_params[configNr].dev); return 0; } /* * Device to Host Comunication */ static int rndis_indicate_status_msg(int configNr, u32 status) { rndis_indicate_status_msg_type *resp; rndis_resp_t *r; if (rndis_per_dev_params[configNr].state == RNDIS_UNINITIALIZED) return -ENOTSUPP; r = rndis_add_response(configNr, sizeof(rndis_indicate_status_msg_type)); if (!r) return -ENOMEM; resp = (rndis_indicate_status_msg_type *) r->buf; resp->MessageType = __constant_cpu_to_le32( REMOTE_NDIS_INDICATE_STATUS_MSG); resp->MessageLength = __constant_cpu_to_le32(20); resp->Status = cpu_to_le32(status); resp->StatusBufferLength = __constant_cpu_to_le32(0); resp->StatusBufferOffset = __constant_cpu_to_le32(0); if (rndis_per_dev_params[configNr].ack) rndis_per_dev_params[configNr].ack( rndis_per_dev_params[configNr].dev); return 0; } int rndis_signal_connect(int configNr) { rndis_per_dev_params[configNr].media_state = NDIS_MEDIA_STATE_CONNECTED; return rndis_indicate_status_msg(configNr, RNDIS_STATUS_MEDIA_CONNECT); } int rndis_signal_disconnect(int configNr) { rndis_per_dev_params[configNr].media_state = NDIS_MEDIA_STATE_DISCONNECTED; #ifdef RNDIS_COMPLETE_SIGNAL_DISCONNECT return rndis_indicate_status_msg(configNr, RNDIS_STATUS_MEDIA_DISCONNECT); #else return 0; #endif } void rndis_uninit(int configNr) { u8 *buf; u32 length; if (configNr >= RNDIS_MAX_CONFIGS) return; rndis_per_dev_params[configNr].used = 0; rndis_per_dev_params[configNr].state = RNDIS_UNINITIALIZED; /* drain the response queue */ while ((buf = rndis_get_next_response(configNr, &length))) rndis_free_response(configNr, buf); } void rndis_set_host_mac(int configNr, const u8 *addr) { rndis_per_dev_params[configNr].host_mac = addr; } enum rndis_state rndis_get_state(int configNr) { if (configNr >= RNDIS_MAX_CONFIGS || configNr < 0) return -ENOTSUPP; return rndis_per_dev_params[configNr].state; } /* * Message Parser */ int rndis_msg_parser(u8 configNr, u8 *buf) { u32 MsgType, MsgLength; __le32 *tmp; struct rndis_params *params; debug("%s: configNr = %d, %p\n", __func__, configNr, buf); if (!buf) return -ENOMEM; tmp = (__le32 *) buf; MsgType = get_unaligned_le32(tmp++); MsgLength = get_unaligned_le32(tmp++); if (configNr >= RNDIS_MAX_CONFIGS) return -ENOTSUPP; params = &rndis_per_dev_params[configNr]; /* * NOTE: RNDIS is *EXTREMELY* chatty ... Windows constantly polls for * rx/tx statistics and link status, in addition to KEEPALIVE traffic * and normal HC level polling to see if there's any IN traffic. */ /* For USB: responses may take up to 10 seconds */ switch (MsgType) { case REMOTE_NDIS_INITIALIZE_MSG: debug("%s: REMOTE_NDIS_INITIALIZE_MSG\n", __func__); params->state = RNDIS_INITIALIZED; return rndis_init_response(configNr, (rndis_init_msg_type *) buf); case REMOTE_NDIS_HALT_MSG: debug("%s: REMOTE_NDIS_HALT_MSG\n", __func__); params->state = RNDIS_UNINITIALIZED; return 0; case REMOTE_NDIS_QUERY_MSG: return rndis_query_response(configNr, (rndis_query_msg_type *) buf); case REMOTE_NDIS_SET_MSG: return rndis_set_response(configNr, (rndis_set_msg_type *) buf); case REMOTE_NDIS_RESET_MSG: debug("%s: REMOTE_NDIS_RESET_MSG\n", __func__); return rndis_reset_response(configNr, (rndis_reset_msg_type *) buf); case REMOTE_NDIS_KEEPALIVE_MSG: /* For USB: host does this every 5 seconds */ #if defined(DEBUG) && defined(DEBUG_VERBOSE) debug("%s: REMOTE_NDIS_KEEPALIVE_MSG\n", __func__); #endif return rndis_keepalive_response(configNr, (rndis_keepalive_msg_type *) buf); default: /* * At least Windows XP emits some undefined RNDIS messages. * In one case those messages seemed to relate to the host * suspending itself. */ debug("%s: unknown RNDIS message 0x%08X len %d\n", __func__ , MsgType, MsgLength); { unsigned i; for (i = 0; i < MsgLength; i += 16) { debug("%03d: " " %02x %02x %02x %02x" " %02x %02x %02x %02x" " %02x %02x %02x %02x" " %02x %02x %02x %02x" "\n", i, buf[i], buf[i+1], buf[i+2], buf[i+3], buf[i+4], buf[i+5], buf[i+6], buf[i+7], buf[i+8], buf[i+9], buf[i+10], buf[i+11], buf[i+12], buf[i+13], buf[i+14], buf[i+15]); } } break; } return -ENOTSUPP; } int rndis_register(int (*rndis_control_ack)(struct eth_device *)) { u8 i; for (i = 0; i < RNDIS_MAX_CONFIGS; i++) { if (!rndis_per_dev_params[i].used) { rndis_per_dev_params[i].used = 1; rndis_per_dev_params[i].ack = rndis_control_ack; debug("%s: configNr = %d\n", __func__, i); return i; } } debug("%s failed\n", __func__); return -1; } void rndis_deregister(int configNr) { debug("%s: configNr = %d\n", __func__, configNr); if (configNr >= RNDIS_MAX_CONFIGS) return; rndis_per_dev_params[configNr].used = 0; return; } int rndis_set_param_dev(u8 configNr, struct eth_device *dev, int mtu, struct net_device_stats *stats, u16 *cdc_filter) { debug("%s: configNr = %d\n", __func__, configNr); if (!dev || !stats) return -1; if (configNr >= RNDIS_MAX_CONFIGS) return -1; rndis_per_dev_params[configNr].dev = dev; rndis_per_dev_params[configNr].stats = stats; rndis_per_dev_params[configNr].mtu = mtu; rndis_per_dev_params[configNr].filter = cdc_filter; return 0; } int rndis_set_param_vendor(u8 configNr, u32 vendorID, const char *vendorDescr) { debug("%s: configNr = %d\n", __func__, configNr); if (!vendorDescr) return -1; if (configNr >= RNDIS_MAX_CONFIGS) return -1; rndis_per_dev_params[configNr].vendorID = vendorID; rndis_per_dev_params[configNr].vendorDescr = vendorDescr; return 0; } int rndis_set_param_medium(u8 configNr, u32 medium, u32 speed) { debug("%s: configNr = %d, %u %u\n", __func__, configNr, medium, speed); if (configNr >= RNDIS_MAX_CONFIGS) return -1; rndis_per_dev_params[configNr].medium = medium; rndis_per_dev_params[configNr].speed = speed; return 0; } void rndis_add_hdr(void *buf, int length) { struct rndis_packet_msg_type *header; header = buf; memset(header, 0, sizeof *header); header->MessageType = __constant_cpu_to_le32(REMOTE_NDIS_PACKET_MSG); header->MessageLength = cpu_to_le32(length + sizeof *header); header->DataOffset = __constant_cpu_to_le32(36); header->DataLength = cpu_to_le32(length); } void rndis_free_response(int configNr, u8 *buf) { rndis_resp_t *r; struct list_head *act, *tmp; list_for_each_safe(act, tmp, &(rndis_per_dev_params[configNr].resp_queue)) { r = list_entry(act, rndis_resp_t, list); if (r && r->buf == buf) { list_del(&r->list); free(r); } } } u8 *rndis_get_next_response(int configNr, u32 *length) { rndis_resp_t *r; struct list_head *act, *tmp; if (!length) return NULL; list_for_each_safe(act, tmp, &(rndis_per_dev_params[configNr].resp_queue)) { r = list_entry(act, rndis_resp_t, list); if (!r->send) { r->send = 1; *length = r->length; return r->buf; } } return NULL; } static rndis_resp_t *rndis_add_response(int configNr, u32 length) { rndis_resp_t *r; /* NOTE: this gets copied into ether.c USB_BUFSIZ bytes ... */ r = malloc(sizeof(rndis_resp_t) + length); if (!r) return NULL; r->buf = (u8 *) (r + 1); r->length = length; r->send = 0; list_add_tail(&r->list, &(rndis_per_dev_params[configNr].resp_queue)); return r; } int rndis_rm_hdr(void *buf, int length) { /* tmp points to a struct rndis_packet_msg_type */ __le32 *tmp = buf; int offs, len; /* MessageType, MessageLength */ if (__constant_cpu_to_le32(REMOTE_NDIS_PACKET_MSG) != get_unaligned(tmp++)) return -EINVAL; tmp++; /* DataOffset, DataLength */ offs = get_unaligned_le32(tmp++) + 8 /* offset of DataOffset */; if (offs != sizeof(struct rndis_packet_msg_type)) debug("%s: unexpected DataOffset: %d\n", __func__, offs); if (offs >= length) return -EOVERFLOW; len = get_unaligned_le32(tmp++); if (len + sizeof(struct rndis_packet_msg_type) != length) debug("%s: unexpected DataLength: %d, packet length=%d\n", __func__, len, length); memmove(buf, buf + offs, len); return offs; } int rndis_init(void) { u8 i; for (i = 0; i < RNDIS_MAX_CONFIGS; i++) { rndis_per_dev_params[i].confignr = i; rndis_per_dev_params[i].used = 0; rndis_per_dev_params[i].state = RNDIS_UNINITIALIZED; rndis_per_dev_params[i].media_state = NDIS_MEDIA_STATE_DISCONNECTED; INIT_LIST_HEAD(&(rndis_per_dev_params[i].resp_queue)); } return 0; } void rndis_exit(void) { /* Nothing to do */ }