/******************************************************************************
-Author: Samuel Jero
+Utility to convert a DCCP flow to a TCP flow for DCCP analysis via
+ tcptrace. Header file for Encapsulation Functions for DCCP to TCP conversion.
-Date: 5/2011
+Copyright (C) 2012 Samuel Jero <sj323707@ohio.edu>
-Description: Header file for Encapsulation Functions for DCCP to TCP conversion
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Author: Samuel Jero <sj323707@ohio.edu>
+Date: 11/2012
******************************************************************************/
#ifndef ENCAP_H_
#define ENCAP_H_
/*
* All Conversion functions use these standard arguments:
- * struct pcap_pkthdr *h: This is a copy of the libpcap packet structure.
- * You are free to modify and use the fields.
- *
- * u_char **nptr: This is a pointer to a buffer for the new packet.
- * Each encapsulation has the responsibility to call
- * When a function is called, this will point at the
- * location for that protocol's header to start.
- *
- * int *nlength: The length of the new packet. Each encapsulation
- * can rely on this to contain the remaining buffer
- * space AND must return with this parameter containing
- * the length of the new packet at that layer.
- *
- * u_char** optr: This is a pointer to the buffer containing the
- * old packet. When a functio is called, this will
- * point at the location of that protocol's header.
- *
- * int* length: The length of the old packet. Each encapsulation
- * layer MUST decrement this by the amount of it's
- * headers. An encapsulation layer MUST never read
- * beyond this into optr.
+ * struct packet *new: The New packet. It contains the following fields.
+ *
+ * struct pcap_pkthdr *h: This is a copy of the libpcap packet structure.
+ * You are free to modify and use the fields.
+ *
+ * u_char *data: This is a pointer to a buffer for the new packet.
+ * Each encapsulation has the responsibility to call
+ * When a function is called, this will point at the
+ * location for that protocol's header to start.
+ *
+ * int length: The length of the new packet. Each encapsulation
+ * can rely on this to contain the remaining buffer
+ * space AND must return with this parameter containing
+ * the length of the new packet at that layer.
+ *
+ * int id_len: Length of the source and destination ID.
+ *
+ * u_char *src_id: This is an ID for the source host. If you are going to
+ * demultiplex DCCP on anything but Port Numbers, you
+ * need to set this field. Typically this would be an
+ * IP address.
+ *
+ * u_char *dest_id: This is an ID for the destination host. If you are going to
+ * demultiplex DCCP on anything but Port Numbers, you
+ * need to set this field. Typically this would be an
+ * IP address.
+ *
+ * struct const_packet *old: The Old packet. It contains the following fields.
+ *
+ * u_char* data: This is a pointer to the buffer containing the
+ * old packet. When a function is called, this will
+ * point at the location of that protocol's header.
+ *
+ * int length: The length of the old packet. Each encapsulation
+ * layer MUST decrement this by the amount of it's
+ * headers. An encapsulation layer MUST never read
+ * beyond this into old->data.
*/
/*
* Last Level Conversion Function
* Converts DCCP to TCP for analysis by TCPTRACE
*/
-int convert_packet(struct pcap_pkthdr *h, u_char **nptr, int *nlength, const u_char **optr, int *length);
+int convert_packet(struct packet *new, const struct const_packet *old);
/*Standard Encapsulation Functions*/
-int ethernet_encap(struct pcap_pkthdr *h, u_char **nptr, int *nlength, const u_char **optr, int *length);
-int linux_cooked_encap(struct pcap_pkthdr *h, u_char **nptr, int *nlength, const u_char **optr, int *length);
-int ipv4_encap(struct pcap_pkthdr *h, u_char **nptr, int *nlength, const u_char **optr, int *length);
+int ethernet_encap(struct packet *new, const struct const_packet *old);
+int linux_cooked_encap(struct packet *new, const struct const_packet *old);
+int ipv4_encap(struct packet *new, const struct const_packet *old);
+int ipv6_encap(struct packet *new, const struct const_packet *old);
#endif /* ENCAP_H_ */
projects / dccp2tcp / blobdiff