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#3 move dnsd_read from dns.c to iodined.c, now named read_dns

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This commit is contained in:
Erik Ekman 2007-02-04 15:46:06 +00:00
parent 064d060f79
commit c5317fe388
3 changed files with 36 additions and 32 deletions
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36
src/dns.c
View file

@ -248,12 +248,17 @@ dns_decode(char *buf, size_t buflen, struct query *q, qr_t qr, char *packet, siz
rv = 0;
header = (HEADER*)packet;
// Reject short packets
if (packetlen < sizeof(HEADER)) {
return rv;
}
if (header->qr != qr) {
warnx("header->qr does not match the requested qr");
return -1;
}
data = packet + sizeof(HEADER);
qdcount = ntohs(header->qdcount);
ancount = ntohs(header->ancount);
@ -442,32 +447,3 @@ decodepacket(const char *name, char *buf, int buflen)
return len;
}
int
dnsd_read(int fd, struct query *q, char *buf, int buflen)
{
struct sockaddr_in from;
char packet[64*1024];
socklen_t addrlen;
int len;
int rv;
int r;
addrlen = sizeof(struct sockaddr);
r = recvfrom(fd, packet, sizeof(packet), 0, (struct sockaddr*)&from, &addrlen);
if (r >= sizeof(HEADER)) {
len = dns_decode(buf, buflen, q, QR_QUERY, packet, r);
q->fromlen = addrlen;
memcpy((struct sockaddr*)&q->from, (struct sockaddr*)&from, addrlen);
rv = len;
} else if (r < 0) { // Error
perror("recvfrom");
rv = 0;
} else { // Packet too small to be dns protocol
rv = 0;
}
return rv;
}

1
src/dns.h
View file

@ -37,7 +37,6 @@ int dns_encode_hostname(const char *, char *, int);
int dns_encode(char *, size_t, struct query *, qr_t, char *, size_t);
int dns_decode(char *, size_t, struct query *, qr_t, char *, size_t);
int dnsd_read(int, struct query*, char *, int);
void dnsd_send(int, struct query*, char *, int);
int dnsd_haspacket();

31
src/iodined.c
View file

@ -56,6 +56,8 @@ char password[33];
int my_mtu;
in_addr_t my_ip;
static int read_dns(int, struct query *, char *, int);
static void
sigint(int sig) {
running = 0;
@ -120,7 +122,7 @@ tunnel(int tun_fd, int dns_fd)
outpacket.len = outlen;
}
if(FD_ISSET(dns_fd, &fds)) {
read = dnsd_read(dns_fd, &q, in, sizeof(in));
read = read_dns(dns_fd, &q, in, sizeof(in));
if (read <= 0)
continue;
@ -217,6 +219,33 @@ tunnel(int tun_fd, int dns_fd)
return 0;
}
static int
read_dns(int fd, struct query *q, char *buf, int buflen)
{
struct sockaddr_in from;
char packet[64*1024];
socklen_t addrlen;
int len;
int rv;
int r;
addrlen = sizeof(struct sockaddr);
r = recvfrom(fd, packet, sizeof(packet), 0, (struct sockaddr*)&from, &addrlen);
if (r > 0) {
len = dns_decode(buf, buflen, q, QR_QUERY, packet, r);
q->fromlen = addrlen;
memcpy((struct sockaddr*)&q->from, (struct sockaddr*)&from, addrlen);
rv = len;
} else if (r < 0) { // Error
perror("recvfrom");
rv = 0;
}
return rv;
}
static void
usage() {
extern char *__progname;