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 len = EXTRACT_LE_16BITS(&hdr->ppi_len); 72 if (caplen < len) { 73 /* 74 * If we don't have the entire PPI header, don't 75 * bother. 76 */ 77 ND_PRINT((ndo, "[|ppi]")); 78 return (caplen); 79 } 80 if (len < sizeof(ppi_header_t)) { 81 ND_PRINT((ndo, "[|ppi]")); 82 return (len); 83 } 84 dlt = EXTRACT_LE_32BITS(&hdr->ppi_dlt); 85 86 if (ndo->ndo_eflag) 87 ppi_header_print(ndo, p, length); 88 89 length -= len; 90 caplen -= len; 91 p += len; 92 93 if ((printer = lookup_printer(dlt)) != NULL) { 94 nhdr = *h; 95 nhdr.caplen = caplen; 96 nhdr.len = length; 97 hdrlen = printer(ndo, &nhdr, p); 98 } else { 99 if (!ndo->ndo_eflag) 100 ppi_header_print(ndo, (const u_char *)hdr, length + len); 101 102 if (!ndo->ndo_suppress_default_print) 103 ND_DEFAULTPRINT(p, caplen); 104 hdrlen = 0; 105 } 106 return (len + hdrlen); 107 } 108 109 /* 110 * This is the top level routine of the printer. 'p' points 111 * to the ether header of the packet, 'h->ts' is the timestamp, 112 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 113 * is the number of bytes actually captured. 114 */ 115 u_int 116 ppi_if_print(netdissect_options *ndo, 117 const struct pcap_pkthdr *h, const u_char *p) 118 { 119 return (ppi_print(ndo, h, p)); 120 } 121 122 /* 123 * Local Variables: 124 * c-style: whitesmith 125 * c-basic-offset: 8 126 * End: 127 */ 128 129 #endif /* DLT_PPI */ 130