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https://github.com/yarrick/iodine.git
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Move global values out of dns.c, into iodined.c
This commit is contained in:
Bjorn Andersson
parent
754998f7ef
commit
449bc77f57
48
dns.c
48
dns.c
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@ -28,8 +28,9 @@
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#include <string.h>
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#include <ctype.h>
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#include "dns.h"
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#include "read.h"
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#include "structs.h"
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#include "dns.h"
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static int host2dns(const char *, char *, int);
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static int dns_write(int, int, char *, int, char);
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@ -46,12 +47,6 @@ uint16_t chunkid;
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uint16_t pingid;
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char delayed_q_name[256];
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short delayed_q_type;
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short delayed_q_id;
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struct sockaddr_in delayed_q_from;
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int delayed_q_fromlen;
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int
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open_dns(const char *host, const char *domain)
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@ -145,10 +140,7 @@ open_dnsd(const char *domain)
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topdomain[sizeof(topdomain) - 1] = 0;
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packetlen = 0;
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delayed_q_type = 0;
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delayed_q_id = 0;
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delayed_q_fromlen = 0;
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return fd;
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}
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@ -422,14 +414,8 @@ host2dns(const char *host, char *buffer, int size)
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return p - buffer;
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}
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int
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dnsd_hasack()
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{
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return (delayed_q_id != 0);
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}
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void
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dnsd_send(int fd, char *data, int datalen)
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dnsd_send(int fd, struct query *q, char *data, int datalen)
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{
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int len;
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char *p;
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@ -441,7 +427,7 @@ dnsd_send(int fd, char *data, int datalen)
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len = 0;
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header = (HEADER*)buf;
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header->id = htons(delayed_q_id);
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header->id = htons(q->id);
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header->qr = 1;
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header->opcode = 0;
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header->aa = 1;
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@ -454,16 +440,16 @@ dnsd_send(int fd, char *data, int datalen)
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p = buf + sizeof(HEADER);
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p += host2dns(delayed_q_name, p, strlen(delayed_q_name));
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PUTSHORT(delayed_q_type, p);
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p += host2dns(q->name, p, strlen(q->name));
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PUTSHORT(q->type, p);
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PUTSHORT(C_IN, p);
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p += host2dns(delayed_q_name, p, strlen(delayed_q_name));
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PUTSHORT(delayed_q_type, p);
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p += host2dns(q->name, p, strlen(q->name));
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PUTSHORT(q->type, p);
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PUTSHORT(C_IN, p);
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PUTLONG(0, p);
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delayed_q_id = 0;
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q->id = 0;
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if(datalen > 0) {
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PUTSHORT(datalen, p);
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@ -474,7 +460,7 @@ dnsd_send(int fd, char *data, int datalen)
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}
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len = p - buf;
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sendto(fd, buf, len, 0, (struct sockaddr*)&delayed_q_from, delayed_q_fromlen);
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sendto(fd, buf, len, 0, (struct sockaddr*)&q->from, q->fromlen);
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}
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static int
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@ -518,7 +504,7 @@ close_dnsd(int fd)
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}
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int
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dnsd_read(int fd, char *buf, int buflen)
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dnsd_read(int fd, struct query *q, char *buf, int buflen)
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{
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int r;
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short id;
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@ -554,11 +540,11 @@ dnsd_read(int fd, char *buf, int buflen)
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READSHORT(class, data);
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// Store needed info about delayed response
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strncpy(delayed_q_name, name, 256);
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delayed_q_type = type;
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delayed_q_id = id;
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delayed_q_fromlen = addrlen;
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memcpy((struct sockaddr*)&delayed_q_from, (struct sockaddr*)&from, addrlen);
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strncpy(q->name, name, 256);
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q->type = type;
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q->id = id;
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q->fromlen = addrlen;
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memcpy((struct sockaddr*)&q->from, (struct sockaddr*)&from, addrlen);
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return decodepacket(name, buf, buflen);
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}
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6
dns.h
6
dns.h
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@ -17,8 +17,6 @@
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#ifndef _DNS_H_
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#define _DNS_H_
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#define GOTHELLO -5
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int open_dns(const char *, const char *);
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void close_dns(int);
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@ -34,8 +32,8 @@ extern struct sockaddr_in peer;
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int open_dnsd(const char *);
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void close_dnsd(int);
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int dnsd_read(int, char *, int);
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void dnsd_send(int, char *, int);
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int dnsd_read(int, struct query*, char *, int);
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void dnsd_send(int, struct query*, char *, int);
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int dnsd_haspacket();
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int dnsd_hasack();
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1
iodine.c
1
iodine.c
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@ -29,6 +29,7 @@
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#include <zlib.h>
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#include "tun.h"
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#include "structs.h"
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#include "dns.h"
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#ifndef MAX
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25
iodined.c
25
iodined.c
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@ -29,6 +29,7 @@
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#include <zlib.h>
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#include "tun.h"
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#include "structs.h"
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#include "dns.h"
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#ifndef MAX
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@ -37,17 +38,12 @@
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int running = 1;
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struct packet
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{
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int len;
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int offset;
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char data[64*1024];
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};
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struct packet packetbuf;
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struct packet outpacket;
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int outid;
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struct query q;
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static void
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sigint(int sig) {
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running = 0;
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@ -66,7 +62,7 @@ tunnel(int tun_fd, int dns_fd)
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char out[64*1024];
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while (running) {
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if (dnsd_hasack()) {
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if (q.id != 0) {
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tv.tv_sec = 0;
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tv.tv_usec = 5000;
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} else {
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@ -88,9 +84,10 @@ tunnel(int tun_fd, int dns_fd)
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}
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if (i==0) {
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if (dnsd_hasack())
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dnsd_send(dns_fd, outpacket.data, outpacket.len);
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if (q.type != 0)
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dnsd_send(dns_fd, &q, outpacket.data, outpacket.len);
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outpacket.len = 0;
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q.id = 0;
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} else {
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if(FD_ISSET(tun_fd, &fds)) {
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read = read_tun(tun_fd, in, sizeof(in));
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@ -103,13 +100,13 @@ tunnel(int tun_fd, int dns_fd)
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outpacket.len = outlen;
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}
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if(FD_ISSET(dns_fd, &fds)) {
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read = dnsd_read(dns_fd, in, sizeof(in));
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read = dnsd_read(dns_fd, &q, in, sizeof(in));
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if (read < 0)
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continue;
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if(in[0] == 'H' || in[0] == 'h') {
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read = snprintf(out, sizeof(out), "%s-%d", "172.30.5.2", 1023);
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dnsd_send(dns_fd, out, read);
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dnsd_send(dns_fd, &q, out, read);
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} else if((in[0] >= '0' && in[0] <= '9')
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|| (in[0] >= 'a' && in[0] <= 'f')
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|| (in[0] >= 'A' && in[0] <= 'F')) {
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@ -133,8 +130,9 @@ tunnel(int tun_fd, int dns_fd)
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packetbuf.len = packetbuf.offset = 0;
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}
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if (outpacket.len > 0) {
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dnsd_send(dns_fd, outpacket.data, outpacket.len);
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dnsd_send(dns_fd, &q, outpacket.data, outpacket.len);
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outpacket.len = 0;
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q.id = 0;
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}
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}
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}
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@ -194,6 +192,7 @@ main(int argc, char **argv)
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packetbuf.len = 0;
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packetbuf.offset = 0;
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outpacket.len = 0;
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q.id = 0;
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while ((choice = getopt(argc, argv, "vfhu:t:m:")) != -1) {
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switch(choice) {
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35
structs.h
Normal file
35
structs.h
Normal file
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@ -0,0 +1,35 @@
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/*
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* Copyright (c) 2006 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 _STRUCTS_H_
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#define _STRUCTS_H_
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struct packet
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{
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int len;
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int offset;
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char data[64*1024];
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};
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struct query {
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char name[256];
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short type;
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short id;
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struct sockaddr_in from;
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int fromlen;
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};
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#endif /* _STRUCTS_H_ */
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