Annotation of embedaddon/hping2/ars.h, revision 1.1
1.1 ! misho 1: /* Copyright (C) 2000,2001 Salvatore Sanfilippo <antirez@invece.org>
! 2: * See the LICENSE file for more information. */
! 3:
! 4: /* $Id: ars.h,v 1.3 2003/07/28 09:00:55 njombart Exp $ */
! 5:
! 6: #ifndef _ARS_H
! 7: #define _ARS_H
! 8:
! 9: /* define before including sys/socket.h */
! 10: #if defined(__APPLE__)
! 11: #define _BSD_SOCKLEN_T_ int
! 12: #endif
! 13:
! 14: #include <sys/types.h>
! 15: #include <sys/socket.h>
! 16: #include "systype.h"
! 17: #include "in.h"
! 18: #include "bytesex.h"
! 19:
! 20: #ifndef TRUE
! 21: #define TRUE 1
! 22: #define FALSE 0
! 23: #endif
! 24:
! 25:
! 26: #ifndef MIN
! 27: #define MIN(x,y) ((x)<(y)?(x):(y))
! 28: #endif
! 29:
! 30: #ifndef MAX
! 31: #define MAX(x,y) ((x)>(y)?(x):(y))
! 32: #endif
! 33:
! 34: #ifdef DEBUG
! 35: #define __D(x) x
! 36: #else
! 37: #define __D(x) do { } while (0);
! 38: #endif
! 39:
! 40: #ifndef __u8
! 41: #define __u8 u_int8_t
! 42: #define __u16 u_int16_t
! 43: #define __u32 u_int32_t
! 44: #endif
! 45:
! 46: /* error codes */
! 47: #define ARS_OK 0
! 48: #define ARS_ERROR 1
! 49: #define ARS_NOSPACE 2
! 50: #define ARS_NOMEM 3
! 51: #define ARS_INVALID 4
! 52:
! 53: /* Headers size */
! 54: #define ARS_ICMPHDR_SIZE sizeof(struct ars_icmphdr)
! 55: #define ARS_UDPHDR_SIZE sizeof(struct ars_udphdr)
! 56: #define ARS_TCPHDR_SIZE sizeof(struct ars_tcphdr)
! 57: #define ARS_IPHDR_SIZE sizeof(struct ars_iphdr)
! 58: #define ARS_PSEUDOHDR_SIZE sizeof(struct pseudohdr)
! 59:
! 60: /* IP defines */
! 61: #define ARS_MAX_IP_SIZE 65535
! 62:
! 63: #define ARS_IP_MF ((unsigned short)0x2000) /* more fragments */
! 64: #define ARS_IP_DF ((unsigned short)0x4000) /* dont fragment */
! 65: #define ARS_IP_RF ((unsigned short)0x8000) /* reserved fragment flag */
! 66:
! 67: #define ARS_IPOPT_COPY 0x80
! 68: #define ARS_IPOPT_CLASS_MASK 0x60
! 69: #define ARS_IPOPT_NUMBER_MASK 0x1f
! 70:
! 71: #define ARS_IPOPT_COPIED(o) ((o)&ARS_IPOPT_COPY)
! 72: #define ARS_IPOPT_CLASS(o) ((o)&ARS_IPOPT_CLASS_MASK)
! 73: #define ARS_IPOPT_NUMBER(o) ((o)&ARS_IPOPT_NUMBER_MASK)
! 74:
! 75: #define ARS_IPOPT_CONTROL 0x00
! 76: #define ARS_IPOPT_RESERVED1 0x20
! 77: #define ARS_IPOPT_MEASUREMENT 0x40
! 78: #define ARS_IPOPT_RESERVED2 0x60
! 79:
! 80: #define ARS_IPOPT_END (0 |ARS_IPOPT_CONTROL)
! 81: #define ARS_IPOPT_NOOP (1 |ARS_IPOPT_CONTROL)
! 82: #define ARS_IPOPT_SEC (2 |ARS_IPOPT_CONTROL|ARS_IPOPT_COPY)
! 83: #define ARS_IPOPT_LSRR (3 |ARS_IPOPT_CONTROL|ARS_IPOPT_COPY)
! 84: #define ARS_IPOPT_TIMESTAMP (4 |ARS_IPOPT_MEASUREMENT)
! 85: #define ARS_IPOPT_RR (7 |ARS_IPOPT_CONTROL)
! 86: #define ARS_IPOPT_SID (8 |ARS_IPOPT_CONTROL|ARS_IPOPT_COPY)
! 87: #define ARS_IPOPT_SSRR (9 |ARS_IPOPT_CONTROL|ARS_IPOPT_COPY)
! 88: #define ARS_IPOPT_RA (20|ARS_IPOPT_CONTROL|ARS_IPOPT_COPY)
! 89:
! 90: #define ARS_IPOPT_OPTVAL 0
! 91: #define ARS_IPOPT_OLEN 1
! 92: #define ARS_IPOPT_OFFSET 2
! 93: #define ARS_IPOPT_MINOFF 4
! 94: #define ARS_MAX_IPOPTLEN 40
! 95: #define ARS_IPOPT_NOP ARS_IPOPT_NOOP
! 96: #define ARS_IPOPT_EOL ARS_IPOPT_END
! 97: #define ARS_IPOPT_TS ARS_IPOPT_TIMESTAMP
! 98:
! 99: #define ARS_IPOPT_TS_TSONLY 0 /* timestamps only */
! 100: #define ARS_IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
! 101: #define ARS_IPOPT_TS_PRESPEC 3 /* specified modules only */
! 102:
! 103: /* IPV4 and IPV6 string rappresentation len */
! 104: #define ARS_INET_ADDRSTRLEN 16
! 105: #define ARS_INET6_ADDRSTRLEN 46
! 106:
! 107: /* TCP */
! 108: #define ARS_TCPOPT_EOL 0
! 109: #define ARS_TCPOPT_NOP 1
! 110: #define ARS_TCPOPT_MAXSEG 2
! 111: #define ARS_TCPOPT_WINDOW 3
! 112: #define ARS_TCPOPT_SACK_PERM 4
! 113: #define ARS_TCPOPT_SACK 5
! 114: #define ARS_TCPOPT_ECHOREQUEST 6
! 115: #define ARS_TCPOPT_ECHOREPLY 7
! 116: #define ARS_TCPOPT_TIMESTAMP 8
! 117:
! 118: #define ARS_TCP_TH_FIN 0x01
! 119: #define ARS_TCP_TH_SYN 0x02
! 120: #define ARS_TCP_TH_RST 0x04
! 121: #define ARS_TCP_TH_PUSH 0x08
! 122: #define ARS_TCP_TH_ACK 0x10
! 123: #define ARS_TCP_TH_URG 0x20
! 124: #define ARS_TCP_TH_X 0x40 /* X tcp flag */
! 125: #define ARS_TCP_TH_Y 0x80 /* Y tcp flag */
! 126:
! 127: /* ICMP TYPE */
! 128: #define ARS_ICMP_ECHOREPLY 0 /* Echo Reply */
! 129: #define ARS_ICMP_DEST_UNREACH 3 /* Destination Unreachable */
! 130: #define ARS_ICMP_SOURCE_QUENCH 4 /* Source Quench */
! 131: #define ARS_ICMP_REDIRECT 5 /* Redirect (change route) */
! 132: #define ARS_ICMP_ECHO 8 /* Echo Request */
! 133: #define ARS_ICMP_TIME_EXCEEDED 11 /* Time Exceeded */
! 134: #define ARS_ICMP_PARAMETERPROB 12 /* Parameter Problem */
! 135: #define ARS_ICMP_TIMESTAMP 13 /* Timestamp Request */
! 136: #define ARS_ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */
! 137: #define ARS_ICMP_INFO_REQUEST 15 /* Information Request */
! 138: #define ARS_ICMP_INFO_REPLY 16 /* Information Reply */
! 139: #define ARS_ICMP_ADDRESS 17 /* Address Mask Request */
! 140: #define ARS_ICMP_ADDRESSREPLY 18 /* Address Mask Reply */
! 141:
! 142: /* Codes for UNREACHABLE */
! 143: #define ARS_ICMP_UNR_NET 0 /* Network Unreachable */
! 144: #define ARS_ICMP_UNR_HOST 1 /* Host Unreachable */
! 145: #define ARS_ICMP_UNR_PROT 2 /* Protocol Unreachable */
! 146: #define ARS_ICMP_UNR_PORT 3 /* Port Unreachable */
! 147: #define ARS_ICMP_UNR_FRAG_NEEDED 4 /* Fragmentation Needed,DF set*/
! 148: #define ARS_ICMP_UNR_SR_FAILED 5 /* Source Route failed */
! 149: #define ARS_ICMP_UNR_UNK_NET 6
! 150: #define ARS_ICMP_UNR_UNK_HOST 7
! 151: #define ARS_ICMP_UNR_ISOLATED_HOST 8
! 152: #define ARS_ICMP_UNR_NET_ANO 9
! 153: #define ARS_ICMP_UNR_HOST_ANO 10
! 154: #define ARS_ICMP_UNR_NET_UNR_TOS 11
! 155: #define ARS_ICMP_UNR_HOST_UNR_TOS 12
! 156: #define ARS_ICMP_UNR_PKT_FILTERED 13 /* Packet filtered */
! 157: #define ARS_ICMP_UNR_PREC_VIOLATION 14 /* Precedence violation */
! 158: #define ARS_ICMP_UNR_PREC_CUTOFF 15 /* Precedence cut off */
! 159: #define ARS_NR_ICMP_UNREACH 15 /* Instead of hardcoded immediate value */
! 160:
! 161: /* Codes for REDIRECT */
! 162: #define ARS_ICMP_REDIR_NET 0 /* Redirect Net */
! 163: #define ARS_ICMP_REDIR_HOST 1 /* Redirect Host */
! 164: #define ARS_ICMP_REDIR_NETTOS 2 /* Redirect Net for TOS */
! 165: #define ARS_ICMP_REDIR_HOSTTOS 3 /* Redirect Host for TOS */
! 166:
! 167: /* Codes for TIME_EXCEEDED */
! 168: #define ARS_ICMP_EXC_TTL 0 /* TTL count exceeded */
! 169: #define ARS_ICMP_EXC_FRAGTIME 1 /* TTL exceeded reassembling */
! 170:
! 171: /* The IP header structure */
! 172: struct ars_iphdr {
! 173: #if defined(BYTE_ORDER_LITTLE_ENDIAN)
! 174: __u8 ihl:4,
! 175: version:4;
! 176: #elif defined (BYTE_ORDER_BIG_ENDIAN)
! 177: __u8 version:4,
! 178: ihl:4;
! 179: #else
! 180: #error "Please, edit Makefile and add -DBYTE_ORDER_(BIG|LITTLE)_ENDIAN"
! 181: #endif
! 182: __u8 tos;
! 183: __u16 tot_len;
! 184: __u16 id;
! 185: __u16 frag_off;
! 186: __u8 ttl;
! 187: __u8 protocol;
! 188: __u16 check;
! 189: __u32 saddr;
! 190: __u32 daddr;
! 191: };
! 192:
! 193: /* The IP options structure */
! 194: struct ars_ipopt {
! 195: u_int8_t kind;
! 196: u_int8_t len;
! 197: union {
! 198: struct {
! 199: u_int16_t s;
! 200: u_int16_t c;
! 201: u_int16_t h;
! 202: u_int8_t tcc[3];
! 203: } sec; /* security */
! 204: struct {
! 205: u_int8_t ptr;
! 206: u_int8_t data[37];
! 207: } src; /* loose and strinct source routing */
! 208: struct {
! 209: u_int8_t ptr;
! 210: u_int8_t data[37];
! 211: } rr; /* record route */
! 212: struct {
! 213: u_int16_t id;
! 214: } sid; /* stream id */
! 215: struct {
! 216: u_int8_t ptr;
! 217: u_int8_t flags;
! 218: u_int8_t data[36];
! 219: } tstamp; /* timestamp */
! 220: } un;
! 221: };
! 222:
! 223: /* The UDP header structure */
! 224: struct ars_udphdr {
! 225: __u16 uh_sport; /* source port */
! 226: __u16 uh_dport; /* destination port */
! 227: __u16 uh_ulen; /* udp length */
! 228: __u16 uh_sum; /* udp checksum */
! 229: };
! 230:
! 231: /* The TCP header structure */
! 232: struct ars_tcphdr {
! 233: __u16 th_sport; /* source port */
! 234: __u16 th_dport; /* destination port */
! 235: __u32 th_seq; /* sequence number */
! 236: __u32 th_ack; /* acknowledgement number */
! 237: #if defined (BYTE_ORDER_LITTLE_ENDIAN)
! 238: __u8 th_x2:4, /* (unused) */
! 239: th_off:4; /* data offset */
! 240: #elif defined (BYTE_ORDER_BIG_ENDIAN)
! 241: __u8 th_off:4, /* data offset */
! 242: th_x2:4; /* (unused) */
! 243: #else
! 244: #error "Please, edit Makefile and add -DBYTE_ORDER_(BIG|LITTLE)_ENDIAN"
! 245: #endif
! 246: __u8 th_flags;
! 247: __u16 th_win; /* window */
! 248: __u16 th_sum; /* checksum */
! 249: __u16 th_urp; /* urgent pointer */
! 250: };
! 251:
! 252: /* The TCP options structure */
! 253: struct ars_tcpopt {
! 254: u_int8_t kind;
! 255: u_int8_t len;
! 256: union {
! 257: struct {
! 258: u_int16_t size;
! 259: } mss;
! 260: struct {
! 261: u_int8_t shift;
! 262: } win;
! 263: struct {
! 264: u_int16_t origin;
! 265: u_int16_t size;
! 266: } sack[10]; /* 10 SACK blocks in 44 bytes of space */
! 267: struct {
! 268: u_int8_t info[4];
! 269: } echo;
! 270: struct {
! 271: u_int8_t tsval[4];
! 272: u_int8_t tsecr[4];
! 273: } timestamp;
! 274: } un;
! 275: };
! 276:
! 277: /* The ICMP header structure */
! 278: struct ars_icmphdr
! 279: {
! 280: __u8 type;
! 281: __u8 code;
! 282: __u16 checksum;
! 283: union
! 284: {
! 285: struct
! 286: {
! 287: __u16 id;
! 288: __u16 sequence;
! 289: } echo; /* called echo since it's the most used */
! 290: __u32 gateway;
! 291: } un;
! 292: };
! 293:
! 294: /* TCP/UDP pseudo header used to compute the checksum */
! 295: struct ars_pseudohdr
! 296: {
! 297: __u32 saddr;
! 298: __u32 daddr;
! 299: __u8 zero;
! 300: __u8 protocol;
! 301: __u16 lenght;
! 302: };
! 303:
! 304: struct ars_packet; /* forward declaration */
! 305:
! 306: /* ARS layer */
! 307: struct ars_layer {
! 308: int l_type;
! 309: int l_size;
! 310: int l_flags;
! 311: void *l_data;
! 312: struct ars_packet *l_packet;
! 313: };
! 314:
! 315: #define ARS_MAX_LAYER 16
! 316:
! 317: /* Types */
! 318: #define ARS_TYPE_SIZE 32
! 319: #define ARS_TYPE_NULL 0
! 320: #define ARS_TYPE_IP 1
! 321: #define ARS_TYPE_IPOPT 2
! 322: #define ARS_TYPE_ICMP 3
! 323: #define ARS_TYPE_UDP 4
! 324: #define ARS_TYPE_TCP 5
! 325: #define ARS_TYPE_TCPOPT 6
! 326: #define ARS_TYPE_DATA 31
! 327:
! 328: /* ARS packet context */
! 329: struct ars_packet {
! 330: char *p_error;
! 331: int p_layer_nr;
! 332: struct ars_layer p_layer[ARS_MAX_LAYER];
! 333: void *p_default[ARS_TYPE_SIZE];
! 334: int aux; /* Auxiliar variable for data exchange between functions */
! 335: };
! 336:
! 337: /* Facility to check for flags */
! 338: #define ARS_TAKE(f,x) (f & x)
! 339: #define ARS_DONTTAKE(f, x) (!(f & x))
! 340: #define ARS_TAKE_NONE 0
! 341:
! 342: /* IP layer flags */
! 343: #define ARS_TAKE_IP_VERSION (1 << 0)
! 344: #define ARS_TAKE_IP_HDRLEN (1 << 1)
! 345: #define ARS_TAKE_IP_TOTLEN (1 << 2)
! 346: #define ARS_TAKE_IP_PROTOCOL (1 << 3)
! 347: #define ARS_TAKE_IP_CKSUM (1 << 4)
! 348:
! 349: /* ICMP layer flags */
! 350: #define ARS_TAKE_ICMP_CKSUM (1 << 0)
! 351:
! 352: /* UDP layer flags */
! 353: #define ARS_TAKE_UDP_CKSUM (1 << 0)
! 354: #define ARS_TAKE_UDP_LEN (1 << 1)
! 355:
! 356: /* TCP layer flags */
! 357: #define ARS_TAKE_TCP_HDRLEN (1 << 0)
! 358: #define ARS_TAKE_TCP_CKSUM (1 << 1)
! 359:
! 360: /* Some function that acts on layer switch to the last layer with this */
! 361: #define ARS_LAST_LAYER -1
! 362:
! 363: /* Structure and defines needed to calculate the internet-like checksum
! 364: * when the data is splitted in more not adjacent buffers */
! 365: #define ARS_MC_INIT 0
! 366: #define ARS_MC_UPDATE 1
! 367: #define ARS_MC_FINAL 2
! 368:
! 369: struct mc_context {
! 370: u_int32_t oddbyte_flag;
! 371: u_int32_t old;
! 372: u_int8_t oddbyte;
! 373: u_int8_t pad;
! 374: };
! 375:
! 376: /* ARS layer info structure */
! 377: struct ars_layer_info {
! 378: char *li_name; /* NULL = unused slot */
! 379: int (*li_compiler) (struct ars_packet *pkt, int layer); /* NULL = NOP */
! 380: int layer_id;
! 381: };
! 382:
! 383: /* ARS layer info table */
! 384: struct ars_layer_info ars_linfo[ARS_TYPE_SIZE];
! 385:
! 386: /* ARS interface managment structure and defines */
! 387: #define ARS_IF_UP (1 << 0)
! 388: #define ARS_IF_LOOP (1 << 1)
! 389: #define ARS_IF_IPV4 (1 << 2)
! 390: #define ARS_IF_IPV6 (1 << 3)
! 391: #define ARS_IF_MISCONF (1 << 4)
! 392:
! 393: #define ARS_IF_MAX_IFACE 16
! 394: #define ARS_IF_NAME_SIZE 32
! 395:
! 396: /* iface type are obtained using libpcap to avoid efforts duplication */
! 397: struct ars_iface {
! 398: char if_name[ARS_IF_NAME_SIZE];
! 399: int if_mtu;
! 400: int if_flags;
! 401: char if_ipv4addr[ARS_INET_ADDRSTRLEN];
! 402: char if_ipv6addr[ARS_INET6_ADDRSTRLEN];
! 403: };
! 404:
! 405: /* Flags for packet splitting */
! 406: #define ARS_SPLIT_FTRUNC (1 << 0)
! 407: #define ARS_SPLIT_FBADCKSUM (1 << 1)
! 408:
! 409: /* More macros */
! 410: #define ars_atou(x) strtoul(x, (char **) NULL, 0)
! 411:
! 412: /* Prototypes */
! 413: int ars_init(struct ars_packet *pkt);
! 414: int ars_destroy(struct ars_packet *pkt);
! 415: int ars_nospace(struct ars_packet *pkt);
! 416: int ars_add_generic(struct ars_packet *pkt, size_t size, int type);
! 417: void *ars_add_iphdr(struct ars_packet *pkt, int unused);
! 418: void *ars_add_ipopt(struct ars_packet *pkt, int option);
! 419: void *ars_add_udphdr(struct ars_packet *pkt, int unused);
! 420: void *ars_add_tcphdr(struct ars_packet *pkt, int unused);
! 421: void *ars_add_tcpopt(struct ars_packet *pkt, int option);
! 422: void *ars_add_icmphdr(struct ars_packet *pkt, int unused);
! 423: void *ars_add_data(struct ars_packet *pkt, int size);
! 424: size_t ars_relative_size(struct ars_packet *pkt, int layer_nr);
! 425: size_t ars_packet_size(struct ars_packet *pkt);
! 426: u_int16_t ars_cksum(void *vbuf, size_t nbytes);
! 427: u_int16_t ars_multi_cksum(struct mc_context *c, int op, void *vbuf, size_t nbytes);
! 428: int ars_compile(struct ars_packet *pkt);
! 429: int ars_udptcp_cksum(struct ars_packet *pkt, int layer, u_int16_t *sum);
! 430: int ars_open_rawsocket(struct ars_packet *pkt);
! 431: int ars_build_packet(struct ars_packet *pkt, unsigned char **packet, size_t *size);
! 432: int ars_bsd_fix(struct ars_packet *pkt, unsigned char *packet, size_t size);
! 433: int ars_set_flags(struct ars_packet *pkt, int layer, int flags);
! 434: int ars_send(int s, struct ars_packet *pkt, struct sockaddr *sa, socklen_t slen);
! 435: int ars_resolve(struct ars_packet *pkt, u_int32_t *dest, char *hostname);
! 436: int ars_set_error(struct ars_packet *pkt, char *error);
! 437: int ars_d_build(struct ars_packet *pkt, char *t);
! 438: int ars_valid_layer(int layer);
! 439: int ars_get_iface_list(struct ars_iface *iface, size_t *isize);
! 440: int ars_get_iface(char *name, struct ars_iface *i);
! 441: int ars_valid_layer(int layer);
! 442: int ars_remove_layer(struct ars_packet *pkt, int layer);
! 443:
! 444: /* split.c prototypes */
! 445: int ars_seems_ip(struct ars_iphdr *ip, size_t size);
! 446: int ars_guess_ipoff(void *packet, size_t size, int *lhs);
! 447: int ars_check_ip_cksum(struct ars_iphdr *ip);
! 448: int ars_check_icmp_cksum(struct ars_icmphdr *icmp, size_t size);
! 449: int ars_split_packet(void *packet, size_t size, int ipoff, struct ars_packet *pkt);
! 450: #endif /* _ARS_H */
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