115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
#ifndef TEMPL_PAYLOADS_H
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#define TEMPL_PAYLOADS_H
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#include <stdio.h>
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#include <stdint.h>
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struct MassIP;
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/**
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* Regression test this module.
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* @return
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* 0 on success, or positive integer on failure.
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*/
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int
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templ_payloads_selftest(void);
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/**
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* Create this module. Must be matched with the 'destroy()' function on exit
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*/
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struct PayloadsUDP *
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payloads_udp_create(void);
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struct PayloadsUDP *
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payloads_oproto_create(void);
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/**
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* Free the resources of an object created with a matching call to
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* 'payloads_create()'
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*/
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void
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payloads_udp_destroy(struct PayloadsUDP *payloads);
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void
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payloads_oproto_destroy(struct PayloadsUDP *payloads);
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/**
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* Read payloads from an "nmap-payloads" formatted file. The caller is
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* responsible for opening/closing the file, but should passing the
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* filename so that we can print helpful error messages.
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*/
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void
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payloads_udp_readfile(FILE *fp, const char *filename,
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struct PayloadsUDP *payloads);
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/**
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* Read payloads from a libpcap formatted file.
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*/
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void
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payloads_read_pcap(const char *filename, struct PayloadsUDP *payloads, struct PayloadsUDP *oproto_payloads);
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/**
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* Called to remove any payloads that aren't be used in the scan. This makes
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* lookups faster when generating packets.
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*/
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void
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payloads_udp_trim(struct PayloadsUDP *payloads, const struct MassIP *targets);
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void
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payloads_oproto_trim(struct PayloadsUDP *payloads, const struct MassIP *targets);
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/**
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* The port scanner creates a "cookie" for every packet that it sends, which
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* will be a 64-bit value, whose low-order bits will be trimmed to fit whatever
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* size is available. For TCP, this becomes the 32-bit seqno of the SYN packet.
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* For UDP protocols, however, each application layer protocol will be
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* different. For example, SNMP can use a 32-bit transaction ID, whereas DNS
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* can use only a 16-bit transaction ID.
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*/
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typedef unsigned (*SET_COOKIE)(unsigned char *px, size_t length,
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uint64_t seqno);
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/**
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* Given a UDP port number, return the payload we have that is associated
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* with that port number.
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* @param payloads
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* A table full over payloads.
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* @param port
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* The input port number.
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* @param px
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* The returned payload bytes.
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* @param length
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* The returned count of payload bytes.
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* @param source_port
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* The returned port that should be used when sending packets.
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* @param xsum
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* The returned partial checksum of the payload bytes, so that it
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* doesn't need to be recalculated for every packet.
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* @param set_cookie
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* The returned function that will set the "cookie" field in the
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* packet for each transmission
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*/
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int
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payloads_udp_lookup(
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const struct PayloadsUDP *payloads,
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unsigned port,
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const unsigned char **px,
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unsigned *length,
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unsigned *source_port,
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uint64_t *xsum,
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SET_COOKIE *set_cookie);
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int
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payloads_oproto_lookup(
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const struct PayloadsUDP *payloads,
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unsigned port,
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const unsigned char **px,
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unsigned *length,
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unsigned *source_port,
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uint64_t *xsum,
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SET_COOKIE *set_cookie);
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#endif
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