1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 * 26 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 27 * Copyright 2021 Joyent, Inc. 28 */ 29 30 #ifndef _SNOOP_H 31 #define _SNOOP_H 32 33 #include <rpc/types.h> 34 #include <sys/pfmod.h> 35 #include <sys/time.h> 36 #include <sys/types.h> 37 #include <sys/socket.h> 38 #include <sys/bufmod.h> 39 #include <net/if.h> 40 #include <netinet/in.h> 41 #include <netinet/if_ether.h> 42 #include <netinet/in_systm.h> 43 #include <netinet/ip.h> 44 #include <netinet/ip6.h> 45 #include <netinet/ip_icmp.h> 46 #include <netinet/icmp6.h> 47 #include <net/pppoe.h> 48 #include <libdlpi.h> 49 #include <note.h> 50 51 #ifdef __cplusplus 52 extern "C" { 53 #endif 54 55 /* 56 * Flags to control packet info display 57 */ 58 #define F_NOW 0x00000001 /* display in realtime */ 59 #define F_SUM 0x00000002 /* display summary line */ 60 #define F_ALLSUM 0x00000004 /* display all summary lines */ 61 #define F_DTAIL 0x00000008 /* display detail lines */ 62 #define F_TIME 0x00000010 /* display time */ 63 #define F_ATIME 0x00000020 /* display absolute time */ 64 #define F_RTIME 0x00000040 /* display relative time */ 65 #define F_DROPS 0x00000080 /* display drops */ 66 #define F_LEN 0x00000100 /* display pkt length */ 67 #define F_NUM 0x00000200 /* display pkt number */ 68 #define F_WHO 0x00000400 /* display src/dst */ 69 70 #define MAXLINE (1088) /* max len of detail line */ 71 72 /* 73 * Transient port structure. See TFTP interpreter. 74 */ 75 struct ttable { 76 int t_port; 77 int blksize; 78 int (*t_proc)(int, void *, int); 79 }; 80 81 extern int add_transient(int port, int (*proc)(int, void *, int)); 82 extern struct ttable *is_transient(int port); 83 extern void del_transient(int port); 84 85 /* 86 * The RPC XID cache structure. 87 * When analyzing RPC protocols we 88 * have to cache the xid of the RPC 89 * request together with the program 90 * number, proc, version etc since this 91 * information is missing in the reply 92 * packet. Using the xid in the reply 93 * we can lookup this previously stashed 94 * information in the cache. 95 * 96 * For RPCSEC_GSS flavor, some special processing is 97 * needed for the argument interpretation based on its 98 * control procedure and service type. This information 99 * is stored in the cache table during interpretation of 100 * the rpc header and will be referenced later when the rpc 101 * argument is interpreted. 102 */ 103 #define XID_CACHE_SIZE 256 104 extern struct cache_struct { 105 int xid_num; /* RPC transaction id */ 106 int xid_frame; /* Packet number */ 107 int xid_prog; /* RPC program number */ 108 int xid_vers; /* RPC version number */ 109 int xid_proc; /* RPC procedure number */ 110 unsigned int xid_gss_proc; /* control procedure */ 111 int xid_gss_service; /* none, integ, priv */ 112 } xid_cache[XID_CACHE_SIZE]; 113 114 extern char *tkp, *sav_tkp; 115 extern char *token; 116 extern enum tokentype { 117 EOL, 118 ALPHA, 119 NUMBER, 120 FIELD, 121 ADDR_IP, 122 ADDR_ETHER, 123 SPECIAL, 124 ADDR_IP6, 125 ADDR_AT 126 } tokentype; 127 extern uint_t tokenval; 128 129 enum direction { ANY, TO, FROM }; 130 extern enum direction dir; 131 132 extern int eaddr; /* need ethernet addr */ 133 extern int opstack; /* operand stack depth */ 134 135 /* 136 * The following macros advance the pointer passed to them. They 137 * assume they are given a char *. 138 */ 139 #define GETINT8(v, ptr) { \ 140 (v) = (*(ptr)++); \ 141 } 142 143 #define GETINT16(v, ptr) { \ 144 (v) = *(ptr)++ << 8; \ 145 (v) |= *(ptr)++; \ 146 } 147 148 #define GETINT32(v, ptr) { \ 149 (v) = *(ptr)++ << 8; \ 150 (v) |= *(ptr)++; (v) <<= 8; \ 151 (v) |= *(ptr)++; (v) <<= 8; \ 152 (v) |= *(ptr)++; \ 153 } 154 155 /* 156 * Used to print nested protocol layers. For example, an ip datagram included 157 * in an icmp error, or a PPP packet included in an LCP protocol reject.. 158 */ 159 extern char *prot_nest_prefix; 160 161 extern char *get_sum_line(void); 162 extern char *get_detail_line(int, int); 163 extern int want_packet(uchar_t *, int, int); 164 extern void set_vlan_id(int); 165 extern struct timeval prev_time; 166 extern void process_pkt(struct sb_hdr *, char *, int, int); 167 extern char *getflag(int, int, char *, char *); 168 extern void show_header(char *, char *, int); 169 extern void show_count(void); 170 extern void xdr_init(char *, int); 171 extern char *get_line(int, int); 172 extern int get_line_remain(void); 173 extern char getxdr_char(void); 174 extern char showxdr_char(char *); 175 extern uchar_t getxdr_u_char(void); 176 extern uchar_t showxdr_u_char(char *); 177 extern short getxdr_short(void); 178 extern short showxdr_short(char *); 179 extern ushort_t getxdr_u_short(void); 180 extern ushort_t showxdr_u_short(char *); 181 extern long getxdr_long(void); 182 extern long showxdr_long(char *); 183 extern ulong_t getxdr_u_long(void); 184 extern ulong_t showxdr_u_long(char *); 185 extern longlong_t getxdr_longlong(void); 186 extern longlong_t showxdr_longlong(char *); 187 extern u_longlong_t getxdr_u_longlong(void); 188 extern u_longlong_t showxdr_u_longlong(char *); 189 extern char *getxdr_opaque(char *, int); 190 extern char *getxdr_string(char *, int); 191 extern char *showxdr_string(int, char *); 192 extern char *getxdr_bytes(uint_t *); 193 extern void xdr_skip(int); 194 extern int getxdr_pos(void); 195 extern void setxdr_pos(int); 196 extern char *getxdr_context(char *, int); 197 extern char *showxdr_context(char *); 198 extern enum_t getxdr_enum(void); 199 extern void show_space(void); 200 extern void show_trailer(void); 201 extern char *getxdr_date(void); 202 extern char *showxdr_date(char *); 203 extern char *getxdr_date_ns(void); 204 char *format_time(int64_t sec, uint32_t nsec); 205 extern char *showxdr_date_ns(char *); 206 extern char *getxdr_hex(int); 207 extern char *showxdr_hex(int, char *); 208 extern bool_t getxdr_bool(void); 209 extern bool_t showxdr_bool(char *); 210 extern char *concat_args(char **, int); 211 extern int pf_compile(char *, int); 212 extern void compile(char *, int); 213 extern void load_names(char *); 214 extern void cap_write(struct sb_hdr *, char *, int, int); 215 extern void cap_open_read(const char *); 216 extern void cap_open_write(const char *); 217 extern void cap_read(int, int, int, void (*)(), int); 218 extern void cap_close(void); 219 extern boolean_t open_datalink(dlpi_handle_t *, const char *); 220 extern void init_datalink(dlpi_handle_t, ulong_t, ulong_t, struct timeval *, 221 struct Pf_ext_packetfilt *); 222 extern void net_read(dlpi_handle_t, size_t, int, void (*)(), int); 223 extern void click(int); 224 extern void show_pktinfo(int, int, char *, char *, struct timeval *, 225 struct timeval *, int, int); 226 extern void show_line(char *); 227 /*PRINTFLIKE1*/ 228 extern void show_printf(char *fmt, ...) 229 __PRINTFLIKE(1); 230 extern char *getxdr_time(void); 231 extern char *showxdr_time(char *); 232 extern char *addrtoname(int, const void *); 233 extern char *show_string(const char *, int, int); 234 extern void pr_err(const char *, ...); 235 extern void pr_errdlpi(dlpi_handle_t, const char *, int); 236 extern void check_retransmit(char *, ulong_t); 237 extern char *nameof_prog(int); 238 extern char *getproto(int); 239 extern uint8_t print_ipv6_extensions(int, uint8_t **, uint8_t *, int *, int *); 240 extern void protoprint(int, int, ulong_t, int, int, int, char *, int); 241 extern char *getportname(int, in_port_t); 242 243 extern void interpret_arp(int, struct arphdr *, int); 244 extern void interpret_bparam(int, int, int, int, int, char *, int); 245 extern void interpret_dns(int, int, const uchar_t *, int, int); 246 extern void interpret_mount(int, int, int, int, int, char *, int); 247 extern void interpret_nfs(int, int, int, int, int, char *, int); 248 extern void interpret_nfs3(int, int, int, int, int, char *, int); 249 extern void interpret_nfs4(int, int, int, int, int, char *, int); 250 extern void interpret_nfs4_cb(int, int, int, int, int, char *, int); 251 extern void interpret_nfs_acl(int, int, int, int, int, char *, int); 252 extern void interpret_nis(int, int, int, int, int, char *, int); 253 extern void interpret_nisbind(int, int, int, int, int, char *, int); 254 extern void interpret_nlm(int, int, int, int, int, char *, int); 255 extern void interpret_pmap(int, int, int, int, int, char *, int); 256 extern int interpret_reserved(int, int, in_port_t, in_port_t, char *, int); 257 extern void interpret_rquota(int, int, int, int, int, char *, int); 258 extern void interpret_rstat(int, int, int, int, int, char *, int); 259 extern void interpret_solarnet_fw(int, int, int, int, int, char *, int); 260 extern void interpret_ldap(int, char *, int, int, int); 261 extern void interpret_icmp(int, struct icmp *, int, int); 262 extern void interpret_icmpv6(int, icmp6_t *, int, int); 263 extern int interpret_ip(int, const struct ip *, int); 264 extern int interpret_ipv6(int, const ip6_t *, int); 265 extern int interpret_ppp(int, uchar_t *, int); 266 extern int interpret_pppoe(int, poep_t *, int); 267 struct tcphdr; 268 extern int interpret_tcp(int, struct tcphdr *, int, int); 269 struct udphdr; 270 extern int interpret_udp(int, struct udphdr *, int, int); 271 extern int interpret_esp(int, uint8_t *, int, int); 272 extern int interpret_ah(int, uint8_t *, int, int); 273 struct sctp_hdr; 274 extern void interpret_sctp(int, struct sctp_hdr *, int, int); 275 extern void interpret_mip_cntrlmsg(int, uchar_t *, int); 276 struct dhcp; 277 extern int interpret_dhcp(int, struct dhcp *, int); 278 extern int interpret_dhcpv6(int, const uint8_t *, int); 279 struct tftphdr; 280 extern int interpret_tftp(int, void *, int); 281 extern int interpret_http(int, char *, int); 282 struct ntpdata; 283 extern int interpret_ntp(int, struct ntpdata *, int); 284 extern void interpret_netbios_ns(int, uchar_t *, int); 285 extern void interpret_netbios_datagram(int, uchar_t *, int); 286 extern void interpret_netbios_ses(int, uchar_t *, int); 287 extern int interpret_slp(int, void *, int); 288 struct rip; 289 extern int interpret_rip(int, struct rip *, int); 290 struct rip6; 291 extern int interpret_rip6(int, struct rip6 *, int); 292 extern int interpret_socks_call(int, char *, int); 293 extern int interpret_socks_reply(int, char *, int); 294 extern int interpret_trill(int, struct ether_header **, char *, int *); 295 extern int interpret_isis(int, char *, int, boolean_t); 296 extern int interpret_bpdu(int, char *, int); 297 extern void init_ldap(void); 298 extern boolean_t arp_for_ether(char *, struct ether_addr *); 299 extern char *ether_ouiname(uint32_t); 300 extern char *tohex(char *p, int len); 301 extern char *printether(struct ether_addr *); 302 extern char *print_ethertype(int); 303 extern const char *arp_htype(int); 304 extern int valid_rpc(char *, int); 305 306 /* 307 * Describes characteristics of the Media Access Layer. 308 * The mac_type is one of the supported DLPI media 309 * types (see <sys/dlpi.h>). 310 * The mtu_size is the size of the largest frame. 311 * network_type_offset is where the network type 312 * is located in the link layer header. 313 * The header length is returned by a function to 314 * allow for variable header size - for ethernet it's 315 * just a constant 14 octets. 316 * The interpreter is the function that "knows" how 317 * to interpret the frame. 318 * try_kernel_filter tells snoop to first try a kernel 319 * filter (because the header size is fixed, or if it could 320 * be of variable size where the variable size is easy for a kernel 321 * filter to handle, for example, Ethernet and VLAN tags) 322 * and only use a user space filter if the filter expression 323 * cannot be expressed in kernel space. 324 */ 325 typedef uint_t (interpreter_fn_t)(int, char *, int, int); 326 typedef uint_t (headerlen_fn_t)(char *, size_t); 327 typedef struct interface { 328 uint_t mac_type; 329 uint_t mtu_size; 330 uint_t network_type_offset; 331 size_t network_type_len; 332 uint_t network_type_ip; 333 uint_t network_type_ipv6; 334 headerlen_fn_t *header_len; 335 interpreter_fn_t *interpreter; 336 boolean_t try_kernel_filter; 337 } interface_t; 338 339 extern interface_t INTERFACES[], *interface; 340 extern char *dlc_header; 341 extern char *src_name, *dst_name; 342 extern char *prot_prefix; 343 extern char *prot_nest_prefix; 344 extern char *prot_title; 345 346 /* Keep track of how many nested IP headers we have. */ 347 extern unsigned int encap_levels, total_encap_levels; 348 349 extern int quitting; 350 extern boolean_t Iflg, Pflg, fflg, rflg; 351 352 /* 353 * Global error recovery routine: used to reset snoop variables after 354 * catastrophic failure. 355 */ 356 void snoop_recover(void); 357 358 /* 359 * Global alarm handler structure for managing multiple alarms within 360 * snoop. 361 */ 362 typedef struct snoop_handler { 363 struct snoop_handler *s_next; /* next alarm handler */ 364 time_t s_time; /* time to fire */ 365 void (*s_handler)(); /* alarm handler */ 366 } snoop_handler_t; 367 368 #define SNOOP_MAXRECOVER 20 /* maxium number of recoveries */ 369 #define SNOOP_ALARM_GRAN 3 /* alarm() timeout multiplier */ 370 371 /* 372 * Global alarm handler management routine. 373 */ 374 extern int snoop_alarm(int s_sec, void (*s_handler)()); 375 376 /* 377 * The next two definitions do not take into account the length 378 * of the underlying link header. In order to use them, you must 379 * add link_header_len to them. The reason it is not done here is 380 * that later these macros are used to initialize a table. 381 */ 382 #define IPV4_TYPE_HEADER_OFFSET 9 383 #define IPV6_TYPE_HEADER_OFFSET 6 384 385 #ifdef __cplusplus 386 } 387 #endif 388 389 #endif /* _SNOOP_H */ 390