1 /* 2 * Oracle 3 */ 4 5 #include <sys/cdefs.h> 6 #ifndef lint 7 __RCSID("$NetBSD: print-ppi.c,v 1.3 2017/02/05 04:05:05 spz Exp $"); 8 #endif 9 10 /* \summary: Oracle DLT_PPI printer */ 11 12 #ifdef HAVE_CONFIG_H 13 #include "config.h" 14 #endif 15 16 #include <netdissect-stdinc.h> 17 18 #include "netdissect.h" 19 #include "extract.h" 20 21 typedef struct ppi_header { 22 uint8_t ppi_ver; 23 uint8_t ppi_flags; 24 uint16_t ppi_len; 25 uint32_t ppi_dlt; 26 } ppi_header_t; 27 28 #define PPI_HDRLEN 8 29 30 #ifdef DLT_PPI 31 32 static inline void 33 ppi_header_print(netdissect_options *ndo, const u_char *bp, u_int length) 34 { 35 const ppi_header_t *hdr; 36 uint16_t len; 37 uint32_t dlt; 38 const char *dltname; 39 40 hdr = (const ppi_header_t *)bp; 41 42 len = EXTRACT_LE_16BITS(&hdr->ppi_len); 43 dlt = EXTRACT_LE_32BITS(&hdr->ppi_dlt); 44 dltname = pcap_datalink_val_to_name(dlt); 45 46 if (!ndo->ndo_qflag) { 47 ND_PRINT((ndo, "V.%d DLT %s (%d) len %d", hdr->ppi_ver, 48 (dltname != NULL ? dltname : "UNKNOWN"), dlt, 49 len)); 50 } else { 51 ND_PRINT((ndo, "%s", (dltname != NULL ? dltname : "UNKNOWN"))); 52 } 53 54 ND_PRINT((ndo, ", length %u: ", length)); 55 } 56 57 static u_int 58 ppi_print(netdissect_options *ndo, 59 const struct pcap_pkthdr *h, const u_char *p) 60 { 61 if_printer printer; 62 const ppi_header_t *hdr; 63 u_int caplen = h->caplen; 64 u_int length = h->len; 65 uint16_t len; 66 uint32_t dlt; 67 uint32_t hdrlen; 68 struct pcap_pkthdr nhdr; 69 70 if (caplen < sizeof(ppi_header_t)) { 71 ND_PRINT((ndo, "[|ppi]")); 72 return (caplen); 73 } 74 75 hdr = (const ppi_header_t *)p; 76 len = EXTRACT_LE_16BITS(&hdr->ppi_len); 77 if (caplen < len) { 78 /* 79 * If we don't have the entire PPI header, don't 80 * bother. 81 */ 82 ND_PRINT((ndo, "[|ppi]")); 83 return (caplen); 84 } 85 if (len < sizeof(ppi_header_t)) { 86 ND_PRINT((ndo, "[|ppi]")); 87 return (len); 88 } 89 dlt = EXTRACT_LE_32BITS(&hdr->ppi_dlt); 90 91 if (ndo->ndo_eflag) 92 ppi_header_print(ndo, p, length); 93 94 length -= len; 95 caplen -= len; 96 p += len; 97 98 if ((printer = lookup_printer(dlt)) != NULL) { 99 nhdr = *h; 100 nhdr.caplen = caplen; 101 nhdr.len = length; 102 hdrlen = printer(ndo, &nhdr, p); 103 } else { 104 if (!ndo->ndo_eflag) 105 ppi_header_print(ndo, (const u_char *)hdr, length + len); 106 107 if (!ndo->ndo_suppress_default_print) 108 ND_DEFAULTPRINT(p, caplen); 109 hdrlen = 0; 110 } 111 return (len + hdrlen); 112 } 113 114 /* 115 * This is the top level routine of the printer. 'p' points 116 * to the ether header of the packet, 'h->ts' is the timestamp, 117 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 118 * is the number of bytes actually captured. 119 */ 120 u_int 121 ppi_if_print(netdissect_options *ndo, 122 const struct pcap_pkthdr *h, const u_char *p) 123 { 124 return (ppi_print(ndo, h, p)); 125 } 126 127 /* 128 * Local Variables: 129 * c-style: whitesmith 130 * c-basic-offset: 8 131 * End: 132 */ 133 134 #endif /* DLT_PPI */ 135