| /* |
| * Oracle |
| */ |
| |
| /* \summary: Per-Packet Information (DLT_PPI) printer */ |
| |
| /* Specification: |
| * Per-Packet Information Header Specification - Version 1.0.7 |
| * https://web.archive.org/web/20160328114748/http://www.cacetech.com/documents/PPI%20Header%20format%201.0.7.pdf |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #include "netdissect-stdinc.h" |
| |
| #include "netdissect.h" |
| #include "extract.h" |
| |
| |
| typedef struct ppi_header { |
| nd_uint8_t ppi_ver; /* Version. Currently 0 */ |
| nd_uint8_t ppi_flags; /* Flags. */ |
| nd_uint16_t ppi_len; /* Length of entire message, including |
| * this header and TLV payload. */ |
| nd_uint32_t ppi_dlt; /* Data Link Type of the captured |
| * packet data. */ |
| } ppi_header_t; |
| |
| #define PPI_HDRLEN 8 |
| |
| #ifdef DLT_PPI |
| |
| static void |
| ppi_header_print(netdissect_options *ndo, const u_char *bp, u_int length) |
| { |
| const ppi_header_t *hdr; |
| uint16_t len; |
| uint32_t dlt; |
| const char *dltname; |
| |
| hdr = (const ppi_header_t *)bp; |
| |
| len = GET_LE_U_2(hdr->ppi_len); |
| dlt = GET_LE_U_4(hdr->ppi_dlt); |
| dltname = pcap_datalink_val_to_name(dlt); |
| |
| if (!ndo->ndo_qflag) { |
| ND_PRINT("V.%u DLT %s (%u) len %u", GET_U_1(hdr->ppi_ver), |
| (dltname != NULL ? dltname : "UNKNOWN"), dlt, |
| len); |
| } else { |
| ND_PRINT("%s", (dltname != NULL ? dltname : "UNKNOWN")); |
| } |
| |
| ND_PRINT(", length %u: ", length); |
| } |
| |
| /* |
| * This is the top level routine of the printer. 'p' points |
| * to the ether header of the packet, 'h->ts' is the timestamp, |
| * 'h->len' is the length of the packet off the wire, and 'h->caplen' |
| * is the number of bytes actually captured. |
| */ |
| void |
| ppi_if_print(netdissect_options *ndo, |
| const struct pcap_pkthdr *h, const u_char *p) |
| { |
| if_printer printer; |
| const ppi_header_t *hdr; |
| u_int caplen = h->caplen; |
| u_int length = h->len; |
| uint16_t len; |
| uint32_t dlt; |
| uint32_t hdrlen; |
| struct pcap_pkthdr nhdr; |
| |
| ndo->ndo_protocol = "ppi"; |
| if (caplen < sizeof(ppi_header_t)) { |
| nd_print_trunc(ndo); |
| ndo->ndo_ll_hdr_len += caplen; |
| return; |
| } |
| |
| hdr = (const ppi_header_t *)p; |
| len = GET_LE_U_2(hdr->ppi_len); |
| if (len < sizeof(ppi_header_t) || len > 65532) { |
| /* It MUST be between 8 and 65,532 inclusive (spec 3.1.3) */ |
| ND_PRINT(" [length %u < %zu or > 65532]", len, |
| sizeof(ppi_header_t)); |
| nd_print_invalid(ndo); |
| ndo->ndo_ll_hdr_len += caplen; |
| return; |
| } |
| if (caplen < len) { |
| /* |
| * If we don't have the entire PPI header, don't |
| * bother. |
| */ |
| nd_print_trunc(ndo); |
| ndo->ndo_ll_hdr_len += caplen; |
| return; |
| } |
| dlt = GET_LE_U_4(hdr->ppi_dlt); |
| |
| if (ndo->ndo_eflag) |
| ppi_header_print(ndo, p, length); |
| |
| length -= len; |
| caplen -= len; |
| p += len; |
| |
| printer = lookup_printer(dlt); |
| if (printer != NULL) { |
| nhdr = *h; |
| nhdr.caplen = caplen; |
| nhdr.len = length; |
| printer(ndo, &nhdr, p); |
| hdrlen = ndo->ndo_ll_hdr_len; |
| } else { |
| if (!ndo->ndo_eflag) |
| ppi_header_print(ndo, (const u_char *)hdr, length + len); |
| |
| if (!ndo->ndo_suppress_default_print) |
| ND_DEFAULTPRINT(p, caplen); |
| hdrlen = 0; |
| } |
| ndo->ndo_ll_hdr_len += len + hdrlen; |
| } |
| #endif /* DLT_PPI */ |