X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/d9dbb118f2f9c09a8548a2b34a6573f611c0bcf7..1a04b92e365f5ed01ca38619b41bcc4fc9cbd63c:/netdissect.h diff --git a/netdissect.h b/netdissect.h index 3bba2cb1..70c821d9 100644 --- a/netdissect.h +++ b/netdissect.h @@ -41,7 +41,11 @@ * use the EXTRACT_ macros to extract them (which you should be doing * *anyway*, so as not to assume a particular byte order or alignment * in your code). + * + * We even want EXTRACT_U_1 used for 8-bit integral values, so we + * define nd_uint8_t and nd_int8_t as arrays as well. */ +typedef unsigned char nd_uint8_t[1]; typedef unsigned char nd_uint16_t[2]; typedef unsigned char nd_uint24_t[3]; typedef unsigned char nd_uint32_t[4]; @@ -50,24 +54,49 @@ typedef unsigned char nd_uint48_t[6]; typedef unsigned char nd_uint56_t[7]; typedef unsigned char nd_uint64_t[8]; +typedef signed char nd_int8_t[1]; + /* - * Use this for IPv4 addresses. It's defined as an array of octets, so - * that it's not aligned on its "natural" boundary, and it's defined as - * a structure in the hopes that this makes it harder to naively use - * EXTRACT_32BITS() to extract the value - in many cases you just want - * to use UNALIGNED_MEMCPY() to copy its value, so that it remains in - * network byte order. + * Use this for IPv4 addresses and netmasks. + * + * It's defined as an array of octets, so that it's not guaranteed to + * be aligned on its "natural" boundary (in some packet formats, it + * *isn't* so aligned), and it's defined as a structure in the hopes + * that this makes it harder to naively use EXTRACT_BE_U_4() to extract + * the value - in many cases you just want to use UNALIGNED_MEMCPY() to + * copy its value, so that it remains in network byte order. + * + * (Among other things, we don't want somebody thinking "IPv4 addresses, + * they're in network byte order, so we want EXTRACT_BE_U_4(), right?" + * and then handing the result to system APIs that expect network-order + * IPv4 addresses, such as inet_ntop(), on their little-endian PCs, getting + * the wrong behavior, and concluding "oh, it must be in *little*-endian + * order" and "fixing" it to use EXTRACT_LE_U_4(). Yes, people do this; + * that's why Wireshark has tvb_get_ipv4(), to extract an IPv4 address from + * a packet data buffer; it was introduced in reaction to somebody who + * *had* done that.) */ typedef struct { unsigned char bytes[4]; } nd_ipv4; /* - * Data types corresponding to single-byte integral values, for - * completeness. + * Use this for IPv6 addresses and netmasks. + */ +typedef struct { + unsigned char bytes[16]; +} nd_ipv6; + +/* + * Use this for MAC addresses. + */ +#define MAC_ADDR_LEN 6 /* length of MAC addresses */ +typedef unsigned char nd_mac_addr[MAC_ADDR_LEN]; + +/* + * Use this for blobs of bytes; make them arrays of nd_byte. */ -typedef unsigned char nd_uint8_t; -typedef signed char nd_int8_t; +typedef unsigned char nd_byte; /* snprintf et al */ @@ -82,19 +111,13 @@ extern int32_t thiszone; /* seconds offset from gmt to local time */ extern const char istr[]; #if !defined(HAVE_SNPRINTF) -int snprintf (char *str, size_t sz, const char *format, ...) -#ifdef __ATTRIBUTE___FORMAT_OK - __attribute__((format (printf, 3, 4))) -#endif /* __ATTRIBUTE___FORMAT_OK */ - ; +int snprintf (char *str, size_t sz, FORMAT_STRING(const char *format), ...) + PRINTFLIKE(3, 4); #endif /* !defined(HAVE_SNPRINTF) */ #if !defined(HAVE_VSNPRINTF) -int vsnprintf (char *str, size_t sz, const char *format, va_list ap) -#ifdef __ATTRIBUTE___FORMAT_OK - __attribute__((format (printf, 3, 0))) -#endif /* __ATTRIBUTE___FORMAT_OK */ - ; +int vsnprintf (char *str, size_t sz, FORMAT_STRING(const char *format), + va_list ap) PRINTFLIKE(3, 0); #endif /* !defined(HAVE_VSNPRINTF) */ #ifndef HAVE_STRLCAT @@ -149,7 +172,7 @@ struct netdissect_options { int ndo_bflag; /* print 4 byte ASes in ASDOT notation */ int ndo_eflag; /* print ethernet header */ int ndo_fflag; /* don't translate "foreign" IP address */ - int ndo_Kflag; /* don't check TCP checksums */ + int ndo_Kflag; /* don't check IP, TCP or UDP checksums */ int ndo_nflag; /* leave addresses as numbers */ int ndo_Nflag; /* remove domains from printed host names */ int ndo_qflag; /* quick (shorter) output */ @@ -158,8 +181,8 @@ struct netdissect_options { int ndo_uflag; /* Print undecoded NFS handles */ int ndo_vflag; /* verbosity level */ int ndo_xflag; /* print packet in hex */ - int ndo_Xflag; /* print packet in hex/ascii */ - int ndo_Aflag; /* print packet only in ascii observing TAB, + int ndo_Xflag; /* print packet in hex/ASCII */ + int ndo_Aflag; /* print packet only in ASCII observing TAB, * LF, CR and SPACE as graphical chars */ int ndo_Hflag; /* dissect 802.11s draft mesh standard */ @@ -187,32 +210,20 @@ struct netdissect_options { /* pointer to void function to output stuff */ void (*ndo_default_print)(netdissect_options *, - register const u_char *bp, register u_int length); + const u_char *bp, u_int length); /* pointer to function to do regular output */ int (*ndo_printf)(netdissect_options *, const char *fmt, ...) -#ifdef __ATTRIBUTE___FORMAT_OK_FOR_FUNCTION_POINTERS - __attribute__ ((format (printf, 2, 3))) -#endif - ; + PRINTFLIKE_FUNCPTR(2, 3); /* pointer to function to output errors */ - void (*ndo_error)(netdissect_options *, - const char *fmt, ...) -#ifdef __ATTRIBUTE___NORETURN_OK_FOR_FUNCTION_POINTERS - __attribute__ ((noreturn)) -#endif /* __ATTRIBUTE___NORETURN_OK_FOR_FUNCTION_POINTERS */ -#ifdef __ATTRIBUTE___FORMAT_OK_FOR_FUNCTION_POINTERS - __attribute__ ((format (printf, 2, 3))) -#endif /* __ATTRIBUTE___FORMAT_OK_FOR_FUNCTION_POINTERS */ - ; + void NORETURN_FUNCPTR (*ndo_error)(netdissect_options *, + const char *fmt, ...) + PRINTFLIKE_FUNCPTR(2, 3); /* pointer to function to output warnings */ void (*ndo_warning)(netdissect_options *, const char *fmt, ...) -#ifdef __ATTRIBUTE___FORMAT_OK_FOR_FUNCTION_POINTERS - __attribute__ ((format (printf, 2, 3))) -#endif - ; + PRINTFLIKE_FUNCPTR(2, 3); }; #define PT_VAT 1 /* Visual Audio Tool */ @@ -264,15 +275,14 @@ struct netdissect_options { * savefile header to control the size of the buffer they allocate, * so a size of, say, 2^31-1 might not work well. * - * XXX - does it need to be bigger still? + * XXX - does it need to be bigger still? Note that, for versions of + * libpcap with pcap_create()/pcap_activate(), if no -s flag is specified + * or -s 0 is specified, we won't set the snapshot length at all, and will + * let libpcap choose a snapshot length; newer versions may choose a bigger + * value than 262144 for D-Bus, for example. */ #define MAXIMUM_SNAPLEN 262144 -/* - * The default snapshot length is the maximum. - */ -#define DEFAULT_SNAPLEN MAXIMUM_SNAPLEN - #define ESRC(ep) ((ep)->ether_shost) #define EDST(ep) ((ep)->ether_dhost) @@ -315,23 +325,32 @@ struct netdissect_options { ((uintptr_t)ndo->ndo_snapend - (l) <= (uintptr_t)ndo->ndo_snapend && \ (uintptr_t)&(var) <= (uintptr_t)ndo->ndo_snapend - (l))) +#define ND_TTEST_LEN(p, l) \ + (IS_NOT_NEGATIVE(l) && \ + ((uintptr_t)ndo->ndo_snapend - (l) <= (uintptr_t)ndo->ndo_snapend && \ + (uintptr_t)(p) <= (uintptr_t)ndo->ndo_snapend - (l))) + /* True if "var" was captured */ #define ND_TTEST(var) ND_TTEST2(var, sizeof(var)) /* Bail if "l" bytes of "var" were not captured */ #define ND_TCHECK2(var, l) if (!ND_TTEST2(var, l)) goto trunc +#define ND_TCHECK_LEN(p, l) if (!ND_TTEST_LEN(p, l)) goto trunc + /* Bail if "var" was not captured */ #define ND_TCHECK(var) ND_TCHECK2(var, sizeof(var)) -#define ND_PRINT(STUFF) (*ndo->ndo_printf)STUFF +#define ND_PRINT(STUFF) (ndo->ndo_printf)STUFF #define ND_DEFAULTPRINT(ap, length) (*ndo->ndo_default_print)(ndo, ap, length) extern void ts_print(netdissect_options *, const struct timeval *); -extern void relts_print(netdissect_options *, int); +extern void signed_relts_print(netdissect_options *, int32_t); +extern void unsigned_relts_print(netdissect_options *, uint32_t); extern void fn_print_char(netdissect_options *, u_char); extern int fn_print(netdissect_options *, const u_char *, const u_char *); +extern u_int fn_printztn(netdissect_options *ndo, const u_char *, u_int, const u_char *); extern int fn_printn(netdissect_options *, const u_char *, u_int, const u_char *); extern int fn_printzp(netdissect_options *, const u_char *, u_int, const u_char *); @@ -357,7 +376,30 @@ extern void txtproto_print(netdissect_options *, const u_char *, u_int, extern void safeputchar(netdissect_options *, const u_char); extern void safeputs(netdissect_options *, const u_char *, const u_int); -#ifdef LBL_ALIGN +#if (defined(__i386__) || defined(_M_IX86) || defined(__X86__) || defined(__x86_64__) || defined(_M_X64)) || \ + (defined(__arm__) || defined(_M_ARM) || defined(__aarch64__)) || \ + (defined(__m68k__) && (!defined(__mc68000__) && !defined(__mc68010__))) || \ + (defined(__ppc__) || defined(__ppc64__) || defined(_M_PPC) || defined(_ARCH_PPC) || defined(_ARCH_PPC64)) || \ + (defined(__s390__) || defined(__s390x__) || defined(__zarch__)) || \ + defined(__vax__) +/* + * The procesor natively handles unaligned loads, so just use memcpy() + * and memcmp(), to enable those optimizations. + * + * XXX - are those all the x86 tests we need? + * XXX - do we need to worry about ARMv1 through ARMv5, which didn't + * support unaligned loads, and, if so, do we need to worry about all + * of them, or just some of them, e.g. ARMv5? + * XXX - are those the only 68k tests we need not to generated + * unaligned accesses if the target is the 68000 or 68010? + * XXX - are there any tests we don't need, because some definitions are for + * compilers that also predefine the GCC symbols? + * XXX - do we need to test for both 32-bit and 64-bit versions of those + * architectures in all cases? + */ +#define UNALIGNED_MEMCPY(p, q, l) memcpy((p), (q), (l)) +#define UNALIGNED_MEMCMP(p, q, l) memcmp((p), (q), (l)) +#else /* * The processor doesn't natively handle unaligned loads, * and the compiler might "helpfully" optimize memcpy() @@ -373,13 +415,6 @@ extern void unaligned_memcpy(void *, const void *, size_t); extern int unaligned_memcmp(const void *, const void *, size_t); #define UNALIGNED_MEMCPY(p, q, l) unaligned_memcpy((p), (q), (l)) #define UNALIGNED_MEMCMP(p, q, l) unaligned_memcmp((p), (q), (l)) -#else -/* - * The procesor natively handles unaligned loads, so just use memcpy() - * and memcmp(), to enable those optimizations. - */ -#define UNALIGNED_MEMCPY(p, q, l) memcpy((p), (q), (l)) -#define UNALIGNED_MEMCMP(p, q, l) memcmp((p), (q), (l)) #endif #define PLURAL_SUFFIX(n) \ @@ -409,21 +444,21 @@ extern u_int ieee802_11_radio_if_print IF_PRINTER_ARGS; extern u_int ieee802_15_4_if_print IF_PRINTER_ARGS; extern u_int ipfc_if_print IF_PRINTER_ARGS; extern u_int ipnet_if_print IF_PRINTER_ARGS; -extern u_int juniper_atm1_print IF_PRINTER_ARGS; -extern u_int juniper_atm2_print IF_PRINTER_ARGS; -extern u_int juniper_chdlc_print IF_PRINTER_ARGS; -extern u_int juniper_es_print IF_PRINTER_ARGS; -extern u_int juniper_ether_print IF_PRINTER_ARGS; -extern u_int juniper_frelay_print IF_PRINTER_ARGS; -extern u_int juniper_ggsn_print IF_PRINTER_ARGS; -extern u_int juniper_mfr_print IF_PRINTER_ARGS; -extern u_int juniper_mlfr_print IF_PRINTER_ARGS; -extern u_int juniper_mlppp_print IF_PRINTER_ARGS; -extern u_int juniper_monitor_print IF_PRINTER_ARGS; -extern u_int juniper_ppp_print IF_PRINTER_ARGS; -extern u_int juniper_pppoe_atm_print IF_PRINTER_ARGS; -extern u_int juniper_pppoe_print IF_PRINTER_ARGS; -extern u_int juniper_services_print IF_PRINTER_ARGS; +extern u_int juniper_atm1_if_print IF_PRINTER_ARGS; +extern u_int juniper_atm2_if_print IF_PRINTER_ARGS; +extern u_int juniper_chdlc_if_print IF_PRINTER_ARGS; +extern u_int juniper_es_if_print IF_PRINTER_ARGS; +extern u_int juniper_ether_if_print IF_PRINTER_ARGS; +extern u_int juniper_frelay_if_print IF_PRINTER_ARGS; +extern u_int juniper_ggsn_if_print IF_PRINTER_ARGS; +extern u_int juniper_mfr_if_print IF_PRINTER_ARGS; +extern u_int juniper_mlfr_if_print IF_PRINTER_ARGS; +extern u_int juniper_mlppp_if_print IF_PRINTER_ARGS; +extern u_int juniper_monitor_if_print IF_PRINTER_ARGS; +extern u_int juniper_ppp_if_print IF_PRINTER_ARGS; +extern u_int juniper_pppoe_atm_if_print IF_PRINTER_ARGS; +extern u_int juniper_pppoe_if_print IF_PRINTER_ARGS; +extern u_int juniper_services_if_print IF_PRINTER_ARGS; extern u_int lane_if_print IF_PRINTER_ARGS; extern u_int ltalk_if_print IF_PRINTER_ARGS; extern u_int mfr_if_print IF_PRINTER_ARGS; @@ -446,8 +481,8 @@ extern u_int sll_if_print IF_PRINTER_ARGS; extern u_int sunatm_if_print IF_PRINTER_ARGS; extern u_int symantec_if_print IF_PRINTER_ARGS; extern u_int token_if_print IF_PRINTER_ARGS; -extern u_int usb_linux_48_byte_print IF_PRINTER_ARGS; -extern u_int usb_linux_64_byte_print IF_PRINTER_ARGS; +extern u_int usb_linux_48_byte_if_print IF_PRINTER_ARGS; +extern u_int usb_linux_64_byte_if_print IF_PRINTER_ARGS; /* * Structure passed to some printers to allow them to print @@ -467,7 +502,7 @@ struct lladdr_info { /* The printer routines. */ extern void aarp_print(netdissect_options *, const u_char *, u_int); -extern int ah_print(netdissect_options *, register const u_char *); +extern int ah_print(netdissect_options *, const u_char *); extern void ahcp_print(netdissect_options *, const u_char *, const u_int); extern void aodv_print(netdissect_options *, const u_char *, u_int, int); extern void aoe_print(netdissect_options *, const u_char *, const u_int); @@ -485,7 +520,7 @@ extern void calm_fast_print(netdissect_options *, const u_char *, u_int, const s extern void carp_print(netdissect_options *, const u_char *, u_int, int); extern void cdp_print(netdissect_options *, const u_char *, u_int, u_int); extern void cfm_print(netdissect_options *, const u_char *, u_int); -extern u_int chdlc_print(netdissect_options *, register const u_char *, u_int); +extern u_int chdlc_print(netdissect_options *, const u_char *, u_int); extern void cisco_autorp_print(netdissect_options *, const u_char *, u_int); extern void cnfp_print(netdissect_options *, const u_char *); extern void dccp_print(netdissect_options *, const u_char *, const u_char *, u_int); @@ -497,12 +532,12 @@ extern void dvmrp_print(netdissect_options *, const u_char *, u_int); extern void eap_print(netdissect_options *, const u_char *, u_int); extern void egp_print(netdissect_options *, const u_char *, u_int); extern void eigrp_print(netdissect_options *, const u_char *, u_int); -extern int esp_print(netdissect_options *, const u_char *, const int, const u_char *, int *, int *); +extern int esp_print(netdissect_options *, const u_char *, const int, const u_char *, u_int *, u_int *); extern u_int ether_print(netdissect_options *, const u_char *, u_int, u_int, void (*)(netdissect_options *, const u_char *), const u_char *); extern int ethertype_print(netdissect_options *, u_short, const u_char *, u_int, u_int, const struct lladdr_info *, const struct lladdr_info *); extern u_int fddi_print(netdissect_options *, const u_char *, u_int, u_int); extern void forces_print(netdissect_options *, const u_char *, u_int); -extern u_int fr_print(netdissect_options *, register const u_char *, u_int); +extern u_int fr_print(netdissect_options *, const u_char *, u_int); extern int frag6_print(netdissect_options *, const u_char *, const u_char *); extern void ftp_print(netdissect_options *, const u_char *, u_int); extern void geneve_print(netdissect_options *, const u_char *, u_int); @@ -524,12 +559,12 @@ extern void ip6_print(netdissect_options *, const u_char *, u_int); extern void ipN_print(netdissect_options *, const u_char *, u_int); extern void ip_print(netdissect_options *, const u_char *, u_int); extern void ip_print_inner(netdissect_options *, const u_char *, u_int, u_int nh, const u_char *); -extern int ipcomp_print(netdissect_options *, register const u_char *, int *); +extern void ipcomp_print(netdissect_options *, const u_char *); extern void ipx_netbios_print(netdissect_options *, const u_char *, u_int); extern void ipx_print(netdissect_options *, const u_char *, u_int); extern void isakmp_print(netdissect_options *, const u_char *, u_int, const u_char *); extern void isakmp_rfc3948_print(netdissect_options *, const u_char *, u_int, const u_char *); -extern void isoclns_print(netdissect_options *, const u_char *, u_int, u_int); +extern void isoclns_print(netdissect_options *, const u_char *, u_int); extern void krb_print(netdissect_options *, const u_char *); extern void l2tp_print(netdissect_options *, const u_char *, u_int); extern void lane_print(netdissect_options *, const u_char *, u_int, u_int); @@ -545,8 +580,8 @@ extern void lwapp_control_print(netdissect_options *, const u_char *, u_int, int extern void lwapp_data_print(netdissect_options *, const u_char *, u_int); extern void lwres_print(netdissect_options *, const u_char *, u_int); extern void m3ua_print(netdissect_options *, const u_char *, const u_int); -extern void medsa_print(netdissect_options *, const u_char *, u_int, u_int); -extern u_int mfr_print(netdissect_options *, register const u_char *, u_int); +extern void medsa_print(netdissect_options *, const u_char *, u_int, u_int, const struct lladdr_info *, const struct lladdr_info *); +extern u_int mfr_print(netdissect_options *, const u_char *, u_int); extern void mobile_print(netdissect_options *, const u_char *, u_int); extern int mobility_print(netdissect_options *, const u_char *, const u_char *); extern void mpcp_print(netdissect_options *, const u_char *, u_int); @@ -559,10 +594,10 @@ extern void nbt_udp137_print(netdissect_options *, const u_char *, int); extern void nbt_udp138_print(netdissect_options *, const u_char *, int); extern void netbeui_print(netdissect_options *, u_short, const u_char *, int); extern void nfsreply_print(netdissect_options *, const u_char *, u_int, const u_char *); -extern void nfsreply_print_noaddr(netdissect_options *, const u_char *, u_int, const u_char *); -extern void nfsreq_print_noaddr(netdissect_options *, const u_char *, u_int, const u_char *); -extern const u_char * ns_nprint (netdissect_options *, register const u_char *, register const u_char *); -extern void ns_print(netdissect_options *, const u_char *, u_int, int); +extern void nfsreply_noaddr_print(netdissect_options *, const u_char *, u_int, const u_char *); +extern void nfsreq_noaddr_print(netdissect_options *, const u_char *, u_int, const u_char *); +extern const u_char * ns_nprint (netdissect_options *, const u_char *, const u_char *); +extern void domain_print(netdissect_options *, const u_char *, u_int, int); extern void nsh_print(netdissect_options *ndo, const u_char *bp, u_int len); extern void ntp_print(netdissect_options *, const u_char *, u_int); extern void oam_print(netdissect_options *, const u_char *, u_int, u_int); @@ -576,7 +611,7 @@ extern void otv_print(netdissect_options *, const u_char *, u_int); extern void pgm_print(netdissect_options *, const u_char *, u_int, const u_char *); extern void pim_print(netdissect_options *, const u_char *, u_int, const u_char *); extern void pimv1_print(netdissect_options *, const u_char *, u_int); -extern u_int ppp_print(netdissect_options *, register const u_char *, u_int); +extern u_int ppp_print(netdissect_options *, const u_char *, u_int); extern u_int pppoe_print(netdissect_options *, const u_char *, u_int); extern void pptp_print(netdissect_options *, const u_char *); extern int print_unknown_data(netdissect_options *, const u_char *, const char *, int); @@ -591,7 +626,7 @@ extern void rrcp_print(netdissect_options *, const u_char *, u_int, const struct extern void rsvp_print(netdissect_options *, const u_char *, u_int); extern int rt6_print(netdissect_options *, const u_char *, const u_char *); extern void rtsp_print(netdissect_options *, const u_char *, u_int); -extern void rx_print(netdissect_options *, register const u_char *, int, int, int, const u_char *); +extern void rx_print(netdissect_options *, const u_char *, u_int, u_int, u_int, const u_char *); extern void sctp_print(netdissect_options *, const u_char *, const u_char *, u_int); extern void sflow_print(netdissect_options *, const u_char *, u_int); extern void sip_print(netdissect_options *, const u_char *, u_int); @@ -602,7 +637,7 @@ extern void smtp_print(netdissect_options *, const u_char *, u_int); extern int snap_print(netdissect_options *, const u_char *, u_int, u_int, const struct lladdr_info *, const struct lladdr_info *, u_int); extern void snmp_print(netdissect_options *, const u_char *, u_int); extern void stp_print(netdissect_options *, const u_char *, u_int); -extern void sunrpcrequest_print(netdissect_options *, const u_char *, u_int, const u_char *); +extern void sunrpc_print(netdissect_options *, const u_char *, u_int, const u_char *); extern void syslog_print(netdissect_options *, const u_char *, u_int); extern void tcp_print(netdissect_options *, const u_char *, u_int, const u_char *, int); extern void telnet_print(netdissect_options *, const u_char *, u_int); @@ -612,8 +647,8 @@ extern void tipc_print(netdissect_options *, const u_char *, u_int, u_int); extern u_int token_print(netdissect_options *, const u_char *, u_int, u_int); extern void udld_print(netdissect_options *, const u_char *, u_int); extern void udp_print(netdissect_options *, const u_char *, u_int, const u_char *, int); -extern int vjc_print(netdissect_options *, register const char *, u_short); -extern void vqp_print(netdissect_options *, register const u_char *, register u_int); +extern int vjc_print(netdissect_options *, const u_char *, u_short); +extern void vqp_print(netdissect_options *, const u_char *, u_int); extern void vrrp_print(netdissect_options *, const u_char *, u_int, const u_char *, int); extern void vtp_print(netdissect_options *, const u_char *, u_int); extern void vxlan_gpe_print(netdissect_options *ndo, const u_char *bp, u_int len); @@ -621,7 +656,7 @@ extern void vxlan_print(netdissect_options *, const u_char *, u_int); extern void wb_print(netdissect_options *, const void *, u_int); extern void zephyr_print(netdissect_options *, const u_char *, int); extern void zmtp1_print(netdissect_options *, const u_char *, u_int); -extern void zmtp1_print_datagram(netdissect_options *, const u_char *, const u_int); +extern void zmtp1_datagram_print(netdissect_options *, const u_char *, const u_int); /* checksum routines */ extern void init_checksum(void);