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https://github.com/yarrick/iodine.git
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#7 Move packet handling out of iodine.c and into packet.c
This commit is contained in:
parent
dc5138bc55
commit
bc5f0a7fb7
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@ -1,5 +1,5 @@
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CC = gcc
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COMMONOBJS = tun.o dns.o read.o encoding.o login.o base32.o base64.o md5.o common.o
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COMMONOBJS = tun.o dns.o read.o encoding.o login.o base32.o base64.o md5.o common.o packet.o
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CLIENTOBJS = iodine.o
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CLIENT = ../bin/iodine
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SERVEROBJS = iodined.o user.o
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@ -11,7 +11,7 @@ ARCH = `uname -m`
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LDFLAGS = -lz
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CFLAGS = -c -g -Wall -D$(OS) -pedantic
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all: stateos $(CLIENT) $(SERVER) $(TESTSUITE)
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all: stateos $(CLIENT) $(SERVER)
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stateos:
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@echo OS is $(OS), arch is $(ARCH)
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@ -30,14 +30,6 @@
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#define QUERY_NAME_SIZE 256
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struct packet
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{
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int len; /* Total packet length */
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int sentlen; /* Length of chunk currently transmitted */
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int offset; /* Current offset */
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char data[64*1024]; /* The data */
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};
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struct query {
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char name[QUERY_NAME_SIZE];
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short type;
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37
src/iodine.c
37
src/iodine.c
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@ -141,12 +141,6 @@ build_hostname(char *buf, size_t buflen,
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return space;
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}
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int
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is_sending()
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{
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return (packet.len != 0);
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}
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int
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read_dns(int fd, char *buf, int buflen)
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{
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@ -166,15 +160,10 @@ read_dns(int fd, char *buf, int buflen)
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rv = dns_decode(buf, buflen, &q, QR_ANSWER, data, r);
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if (is_sending() && chunkid == q.id) {
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if (packet_sending(&packet) && chunkid == q.id) {
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/* Got ACK on sent packet */
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packet.offset += packet.sentlen;
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if (packet.offset == packet.len) {
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/* Packet completed */
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packet.offset = 0;
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packet.len = 0;
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packet.sentlen = 0;
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} else {
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packet_advance(&packet);
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if (packet_sending(&packet)) {
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/* More to send */
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send_chunk(fd);
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}
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@ -199,10 +188,7 @@ tunnel_tun(int tun_fd, int dns_fd)
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inlen = read;
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compress2((uint8_t*)out, &outlen, (uint8_t*)in, inlen, 9);
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memcpy(packet.data, out, MIN(outlen, sizeof(packet.data)));
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packet.sentlen = 0;
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packet.offset = 0;
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packet.len = outlen;
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packet_fill(&packet, out, outlen);
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send_chunk(dns_fd);
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@ -227,7 +213,7 @@ tunnel_dns(int tun_fd, int dns_fd)
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return -1;
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write_tun(tun_fd, out, outlen);
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if (!is_sending())
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if (!packet_sending(&packet))
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send_ping(dns_fd);
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return read;
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@ -248,7 +234,7 @@ tunnel(int tun_fd, int dns_fd)
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tv.tv_usec = 0;
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FD_ZERO(&fds);
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if (!is_sending())
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if (!packet_sending(&packet))
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FD_SET(tun_fd, &fds);
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FD_SET(dns_fd, &fds);
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@ -284,15 +270,18 @@ send_chunk(int fd)
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char buf[4096];
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int avail;
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int code;
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int sentlen;
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char *p;
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p = packet.data;
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p += packet.offset;
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avail = packet.len - packet.offset;
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avail = packet_len_to_send(&packet);
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packet.sentlen = build_hostname(buf + 1, sizeof(buf) - 1, p, avail, topdomain, dataenc);
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sentlen = build_hostname(buf + 1, sizeof(buf) - 1, p, avail, topdomain, dataenc);
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if (packet.sentlen == avail)
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packet_send_len(&packet, sentlen);
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if (sentlen == avail)
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code = 1;
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else
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code = 0;
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@ -325,7 +314,7 @@ send_ping(int fd)
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{
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char data[3];
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if (is_sending()) {
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if (packet_sending(&packet)) {
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packet.sentlen = 0;
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packet.offset = 0;
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packet.len = 0;
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62
src/packet.c
Normal file
62
src/packet.c
Normal file
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@ -0,0 +1,62 @@
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#include <string.h>
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#include "common.h"
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#include "packet.h"
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/**
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* Is some part of this packet sent?
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*/
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int
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packet_sending(struct packet *packet)
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{
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return (packet->len != 0);
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}
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/**
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* Acknowledge that the latest send was succesful
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*/
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void
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packet_advance(struct packet *packet)
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{
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packet->offset += packet->sentlen;
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if (packet->offset == packet->len) {
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/* Packet completed */
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packet->offset = 0;
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packet->len = 0;
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packet->sentlen = 0;
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}
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}
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/**
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* The length to left to send
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*/
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int
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packet_len_to_send(struct packet *packet)
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{
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return packet->len - packet->offset;
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}
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/**
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* Fill the packet with data
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*/
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int
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packet_fill(struct packet *packet, char *data, unsigned long datalen)
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{
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memcpy(packet->data, data, MIN(datalen, PKTSIZE));
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packet->sentlen = 0;
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packet->offset = 0;
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packet->len = datalen;
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return packet->len;
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}
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/**
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* Mark len number of bytes as being sent
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*/
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void
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packet_send_len(struct packet *packet, int len)
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{
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packet->sentlen = len;
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}
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36
src/packet.h
Normal file
36
src/packet.h
Normal file
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@ -0,0 +1,36 @@
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/*
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* Copyright (c) 2006-2007 Bjorn Andersson <flex@kryo.se>, Erik Ekman <yarrick@kryo.se>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef __PACKET_H__
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#define __PACKET_H__
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#define PKTSIZE (64*1024)
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struct packet
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{
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int len; /* Total packet length */
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int sentlen; /* Length of chunk currently transmitted */
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int offset; /* Current offset */
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char data[PKTSIZE]; /* The data */
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};
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int packet_sending(struct packet *);
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void packet_advance(struct packet *);
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int packet_len_to_send(struct packet *);
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int packet_fill(struct packet *, char *, unsigned long);
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void packet_send_len(struct packet *, int);
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#endif
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@ -17,6 +17,8 @@
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#ifndef __USER_H__
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#define __USER_H__
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#include "packet.h"
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#define USERS 8
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struct user {
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