X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/1fe6e66ecec3fb7a7cc729038012cbb264542331..d2777156522f139a858bd6b5b51e364826bc95a7:/print-usb.c diff --git a/print-usb.c b/print-usb.c index 75f78fc9..3f5937ba 100644 --- a/print-usb.c +++ b/print-usb.c @@ -19,20 +19,123 @@ * */ -#define NETDISSECT_REWORKED +/* \summary: USB printer */ + #ifdef HAVE_CONFIG_H -#include "config.h" +#include #endif -#include +#include "netdissect-stdinc.h" + +#define ND_LONGJMP_FROM_TCHECK +#include "netdissect.h" +#include "extract.h" -#include "interface.h" +#ifdef DLT_USB_LINUX +/* + * possible transfer mode + */ +#define URB_TRANSFER_IN 0x80 +#define URB_ISOCHRONOUS 0x0 +#define URB_INTERRUPT 0x1 +#define URB_CONTROL 0x2 +#define URB_BULK 0x3 + +/* + * possible event type + */ +#define URB_SUBMIT 'S' +#define URB_COMPLETE 'C' +#define URB_ERROR 'E' +/* + * USB setup header as defined in USB specification. + * Appears at the front of each Control S-type packet in DLT_USB captures. + */ +typedef struct _usb_setup { + nd_uint8_t bmRequestType; + nd_uint8_t bRequest; + nd_uint16_t wValue; + nd_uint16_t wIndex; + nd_uint16_t wLength; +} pcap_usb_setup; -#if defined(HAVE_PCAP_USB_H) && defined(DLT_USB_LINUX) -#include +/* + * Information from the URB for Isochronous transfers. + */ +typedef struct _iso_rec { + nd_int32_t error_count; + nd_int32_t numdesc; +} iso_rec; + +/* + * Header prepended by linux kernel to each event. + * Appears at the front of each packet in DLT_USB_LINUX captures. + */ +typedef struct _usb_header { + nd_uint64_t id; + nd_uint8_t event_type; + nd_uint8_t transfer_type; + nd_uint8_t endpoint_number; + nd_uint8_t device_address; + nd_uint16_t bus_id; + nd_uint8_t setup_flag;/*if !=0 the urb setup header is not present*/ + nd_uint8_t data_flag; /*if !=0 no urb data is present*/ + nd_int64_t ts_sec; + nd_int32_t ts_usec; + nd_int32_t status; + nd_uint32_t urb_len; + nd_uint32_t data_len; /* amount of urb data really present in this event*/ + pcap_usb_setup setup; +} pcap_usb_header; + +/* + * Header prepended by linux kernel to each event for the 2.6.31 + * and later kernels; for the 2.6.21 through 2.6.30 kernels, the + * "iso_rec" information, and the fields starting with "interval" + * are zeroed-out padding fields. + * + * Appears at the front of each packet in DLT_USB_LINUX_MMAPPED captures. + */ +typedef struct _usb_header_mmapped { + nd_uint64_t id; + nd_uint8_t event_type; + nd_uint8_t transfer_type; + nd_uint8_t endpoint_number; + nd_uint8_t device_address; + nd_uint16_t bus_id; + nd_uint8_t setup_flag;/*if !=0 the urb setup header is not present*/ + nd_uint8_t data_flag; /*if !=0 no urb data is present*/ + nd_int64_t ts_sec; + nd_int32_t ts_usec; + nd_int32_t status; + nd_uint32_t urb_len; + nd_uint32_t data_len; /* amount of urb data really present in this event*/ + union { + pcap_usb_setup setup; + iso_rec iso; + } s; + nd_int32_t interval; /* for Interrupt and Isochronous events */ + nd_int32_t start_frame; /* for Isochronous events */ + nd_uint32_t xfer_flags; /* copy of URB's transfer flags */ + nd_uint32_t ndesc; /* number of isochronous descriptors */ +} pcap_usb_header_mmapped; + +/* + * Isochronous descriptors; for isochronous transfers there might be + * one or more of these at the beginning of the packet data. The + * number of descriptors is given by the "ndesc" field in the header; + * as indicated, in older kernels that don't put the descriptors at + * the beginning of the packet, that field is zeroed out, so that field + * can be trusted even in captures from older kernels. + */ +typedef struct _usb_isodesc { + nd_int32_t status; + nd_uint32_t offset; + nd_uint32_t len; + nd_byte pad[4]; +} usb_isodesc; -static const char tstr[] = "[|usb]"; /* returns direction: 1=inbound 2=outbound -1=invalid */ static int @@ -83,46 +186,58 @@ static void usb_header_print(netdissect_options *ndo, const pcap_usb_header *uh) { int direction; + uint8_t transfer_type, event_type; - switch(uh->transfer_type) + ndo->ndo_protocol = "usb"; + + nd_print_protocol_caps(ndo); + if (ndo->ndo_qflag) + return; + + ND_PRINT(" "); + transfer_type = GET_U_1(uh->transfer_type); + switch(transfer_type) { case URB_ISOCHRONOUS: - ND_PRINT((ndo, "ISOCHRONOUS")); + ND_PRINT("ISOCHRONOUS"); break; case URB_INTERRUPT: - ND_PRINT((ndo, "INTERRUPT")); + ND_PRINT("INTERRUPT"); break; case URB_CONTROL: - ND_PRINT((ndo, "CONTROL")); + ND_PRINT("CONTROL"); break; case URB_BULK: - ND_PRINT((ndo, "BULK")); + ND_PRINT("BULK"); break; default: - ND_PRINT((ndo, " ?")); + ND_PRINT(" ?"); } - switch(uh->event_type) + event_type = GET_U_1(uh->event_type); + switch(event_type) { case URB_SUBMIT: - ND_PRINT((ndo, " SUBMIT")); + ND_PRINT(" SUBMIT"); break; case URB_COMPLETE: - ND_PRINT((ndo, " COMPLETE")); + ND_PRINT(" COMPLETE"); break; case URB_ERROR: - ND_PRINT((ndo, " ERROR")); + ND_PRINT(" ERROR"); break; default: - ND_PRINT((ndo, " ?")); + ND_PRINT(" ?"); } - direction = get_direction(uh->transfer_type, uh->event_type); + direction = get_direction(transfer_type, event_type); if(direction == 1) - ND_PRINT((ndo, " from")); + ND_PRINT(" from"); else if(direction == 2) - ND_PRINT((ndo, " to")); - ND_PRINT((ndo, " %d:%d:%d", uh->bus_id, uh->device_address, uh->endpoint_number & 0x7f)); + ND_PRINT(" to"); + ND_PRINT(" %u:%u:%u", GET_HE_U_2(uh->bus_id), + GET_U_1(uh->device_address), + GET_U_1(uh->endpoint_number) & 0x7f); } /* @@ -133,18 +248,15 @@ usb_header_print(netdissect_options *ndo, const pcap_usb_header *uh) * 'h->len' is the length of the packet off the wire, and 'h->caplen' * is the number of bytes actually captured. */ -u_int -usb_linux_48_byte_print(netdissect_options *ndo, const struct pcap_pkthdr *h, - register const u_char *p) +void +usb_linux_48_byte_if_print(netdissect_options *ndo, + const struct pcap_pkthdr *h _U_, const u_char *p) { - if (h->caplen < sizeof(pcap_usb_header)) { - ND_PRINT((ndo, "%s", tstr)); - return(sizeof(pcap_usb_header)); - } + ndo->ndo_protocol = "usb_linux_48_byte"; + ND_TCHECK_LEN(p, sizeof(pcap_usb_header)); + ndo->ndo_ll_hdr_len += sizeof (pcap_usb_header); usb_header_print(ndo, (const pcap_usb_header *) p); - - return(sizeof(pcap_usb_header)); } #ifdef DLT_USB_LINUX_MMAPPED @@ -156,20 +268,17 @@ usb_linux_48_byte_print(netdissect_options *ndo, const struct pcap_pkthdr *h, * 'h->len' is the length of the packet off the wire, and 'h->caplen' * is the number of bytes actually captured. */ -u_int -usb_linux_64_byte_print(netdissect_options *ndo, const struct pcap_pkthdr *h, - register const u_char *p) +void +usb_linux_64_byte_if_print(netdissect_options *ndo, + const struct pcap_pkthdr *h _U_, const u_char *p) { - if (h->caplen < sizeof(pcap_usb_header_mmapped)) { - ND_PRINT((ndo, "%s", tstr)); - return(sizeof(pcap_usb_header_mmapped)); - } + ndo->ndo_protocol = "usb_linux_64_byte"; + ND_TCHECK_LEN(p, sizeof(pcap_usb_header_mmapped)); + ndo->ndo_ll_hdr_len += sizeof (pcap_usb_header_mmapped); usb_header_print(ndo, (const pcap_usb_header *) p); - - return(sizeof(pcap_usb_header_mmapped)); } #endif /* DLT_USB_LINUX_MMAPPED */ -#endif /* defined(HAVE_PCAP_USB_H) && defined(DLT_USB_LINUX) */ +#endif /* DLT_USB_LINUX */