1 /* 2 * Oracle 3 */ 4 5 /* \summary: Oracle DLT_PPI printer */ 6 7 #ifdef HAVE_CONFIG_H 8 #include "config.h" 9 #endif 10 11 #include <netdissect-stdinc.h> 12 13 #include "netdissect.h" 14 #include "extract.h" 15 16 typedef struct ppi_header { 17 uint8_t ppi_ver; 18 uint8_t ppi_flags; 19 uint16_t ppi_len; 20 uint32_t ppi_dlt; 21 } ppi_header_t; 22 23 #define PPI_HDRLEN 8 24 25 #ifdef DLT_PPI 26 27 static inline void 28 ppi_header_print(netdissect_options *ndo, const u_char *bp, u_int length) 29 { 30 const ppi_header_t *hdr; 31 uint16_t len; 32 uint32_t dlt; 33 const char *dltname; 34 35 hdr = (const ppi_header_t *)bp; 36 37 len = EXTRACT_LE_16BITS(&hdr->ppi_len); 38 dlt = EXTRACT_LE_32BITS(&hdr->ppi_dlt); 39 dltname = pcap_datalink_val_to_name(dlt); 40 41 if (!ndo->ndo_qflag) { 42 ND_PRINT((ndo, "V.%d DLT %s (%d) len %d", hdr->ppi_ver, 43 (dltname != NULL ? dltname : "UNKNOWN"), dlt, 44 len)); 45 } else { 46 ND_PRINT((ndo, "%s", (dltname != NULL ? dltname : "UNKNOWN"))); 47 } 48 49 ND_PRINT((ndo, ", length %u: ", length)); 50 } 51 52 static u_int 53 ppi_print(netdissect_options *ndo, 54 const struct pcap_pkthdr *h, const u_char *p) 55 { 56 if_printer printer; 57 const ppi_header_t *hdr; 58 u_int caplen = h->caplen; 59 u_int length = h->len; 60 uint16_t len; 61 uint32_t dlt; 62 uint32_t hdrlen; 63 struct pcap_pkthdr nhdr; 64 65 if (caplen < sizeof(ppi_header_t)) { 66 ND_PRINT((ndo, "[|ppi]")); 67 return (caplen); 68 } 69 70 hdr = (const ppi_header_t *)p; 71 ND_TCHECK_16BITS(&hdr->ppi_len); 72 len = EXTRACT_LE_16BITS(&hdr->ppi_len); 73 if (caplen < len) { 74 /* 75 * If we don't have the entire PPI header, don't 76 * bother. 77 */ 78 ND_PRINT((ndo, "[|ppi]")); 79 return (caplen); 80 } 81 if (len < sizeof(ppi_header_t)) { 82 ND_PRINT((ndo, "[|ppi]")); 83 return (len); 84 } 85 ND_TCHECK_32BITS(&hdr->ppi_dlt); 86 dlt = EXTRACT_LE_32BITS(&hdr->ppi_dlt); 87 88 if (ndo->ndo_eflag) 89 ppi_header_print(ndo, p, length); 90 91 length -= len; 92 caplen -= len; 93 p += len; 94 95 if ((printer = lookup_printer(dlt)) != NULL) { 96 nhdr = *h; 97 nhdr.caplen = caplen; 98 nhdr.len = length; 99 hdrlen = printer(ndo, &nhdr, p); 100 } else { 101 if (!ndo->ndo_eflag) 102 ppi_header_print(ndo, (const u_char *)hdr, length + len); 103 104 if (!ndo->ndo_suppress_default_print) 105 ND_DEFAULTPRINT(p, caplen); 106 hdrlen = 0; 107 } 108 return (len + hdrlen); 109 trunc: 110 return (caplen); 111 } 112 113 /* 114 * This is the top level routine of the printer. 'p' points 115 * to the ether header of the packet, 'h->ts' is the timestamp, 116 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 117 * is the number of bytes actually captured. 118 */ 119 u_int 120 ppi_if_print(netdissect_options *ndo, 121 const struct pcap_pkthdr *h, const u_char *p) 122 { 123 return (ppi_print(ndo, h, p)); 124 } 125 126 /* 127 * Local Variables: 128 * c-style: whitesmith 129 * c-basic-offset: 8 130 * End: 131 */ 132 133 #endif /* DLT_PPI */ 134