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-rw-r--r--src/network/__dns.c282
1 files changed, 0 insertions, 282 deletions
diff --git a/src/network/__dns.c b/src/network/__dns.c
deleted file mode 100644
index 97d8031c..00000000
--- a/src/network/__dns.c
+++ /dev/null
@@ -1,282 +0,0 @@
-#include <stdint.h>
-#include <netdb.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <limits.h>
-#include <string.h>
-#include <sys/socket.h>
-#include <poll.h>
-#include <netinet/in.h>
-#include <time.h>
-#include <ctype.h>
-#include <unistd.h>
-#include <pthread.h>
-#include <errno.h>
-#include "__dns.h"
-#include "stdio_impl.h"
-
-#define TIMEOUT 5
-#define RETRY 1000
-#define PACKET_MAX 512
-#define PTR_MAX (64 + sizeof ".in-addr.arpa")
-
-static void cleanup(void *p)
-{
-	close((intptr_t)p);
-}
-
-int __dns_doqueries(unsigned char *dest, const char *name, int *rr, int rrcnt)
-{
-	time_t t0 = time(0);
-	int fd;
-	FILE *f, _f;
-	unsigned char _buf[256];
-	char line[64], *s, *z;
-	union {
-		struct sockaddr_in sin;
-		struct sockaddr_in6 sin6;
-	} sa = {0}, ns[3] = {{0}};
-	socklen_t sl = sizeof sa.sin;
-	int nns = 0;
-	int family = AF_INET;
-	unsigned char q[280] = "", *r = dest;
-	int ql;
-	int rlen;
-	int got = 0, failed = 0;
-	int errcode = EAI_AGAIN;
-	int i, j;
-	struct timespec ts;
-	struct pollfd pfd;
-	int id;
-	int cs;
-
-	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
-
-	/* Construct query template - RR and ID will be filled later */
-	if (strlen(name)-1 >= 254U) return EAI_NONAME;
-	q[2] = q[5] = 1;
-	strcpy((char *)q+13, name);
-	for (i=13; q[i]; i=j+1) {
-		for (j=i; q[j] && q[j] != '.'; j++);
-		if (j-i-1u > 62u) return EAI_NONAME;
-		q[i-1] = j-i;
-	}
-	q[i+3] = 1;
-	ql = i+4;
-
-	/* Make a reasonably unpredictable id */
-	clock_gettime(CLOCK_REALTIME, &ts);
-	id = ts.tv_nsec + ts.tv_nsec/65536UL & 0xffff;
-
-	/* Get nameservers from resolv.conf, fallback to localhost */
-	f = __fopen_rb_ca("/etc/resolv.conf", &_f, _buf, sizeof _buf);
-	if (f) for (nns=0; nns<3 && fgets(line, sizeof line, f); ) {
-		if (strncmp(line, "nameserver", 10) || !isspace(line[10]))
-			continue;
-		for (s=line+11; isspace(*s); s++);
-		for (z=s; *z && !isspace(*z); z++);
-		*z=0;
-		if (__ipparse(ns+nns, AF_UNSPEC, s) < 0) continue;
-		ns[nns].sin.sin_port = htons(53);
-		if (ns[nns++].sin.sin_family == AF_INET6) {
-			family = AF_INET6;
-			sl = sizeof sa.sin6;
-		}
-	}
-	if (f) __fclose_ca(f);
-	if (!nns) {
-		ns[0].sin.sin_family = family = AF_INET;
-		ns[0].sin.sin_port = htons(53);
-		ns[0].sin.sin_addr.s_addr = htonl(0x7f000001);
-		nns=1;
-		sl = sizeof sa.sin;
-	}
-
-	/* Get local address and open/bind a socket */
-	sa.sin.sin_family = family;
-	fd = socket(family, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
-
-	/* Handle case where system lacks IPv6 support */
-	if (fd < 0 && errno == EAFNOSUPPORT) {
-		if (family != AF_INET6) return EAI_SYSTEM;
-		fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
-		family = AF_INET;
-	}
-	if (fd < 0) return EAI_SYSTEM;
-
-	/* Convert any IPv4 addresses in a mixed environment to v4-mapped */
-	if (family == AF_INET6) {
-		setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &(int){0}, sizeof 0);
-		for (i=0; i<nns; i++) {
-			if (ns[i].sin.sin_family != AF_INET) continue;
-			memcpy(ns[i].sin6.sin6_addr.s6_addr+12,
-				&ns[i].sin.sin_addr, 4);
-			memcpy(ns[i].sin6.sin6_addr.s6_addr,
-				"\0\0\0\0\0\0\0\0\0\0\xff\xff", 12);
-			ns[i].sin6.sin6_family = AF_INET6;
-			ns[i].sin6.sin6_flowinfo = 0;
-			ns[i].sin6.sin6_scope_id = 0;
-		}
-	}
-
-	pthread_cleanup_push(cleanup, (void *)(intptr_t)fd);
-	pthread_setcancelstate(cs, 0);
-
-	if (bind(fd, (void *)&sa, sl) < 0) {
-		errcode = EAI_SYSTEM;
-		goto out;
-	}
-
-	pfd.fd = fd;
-	pfd.events = POLLIN;
-
-	/* Loop until we timeout; break early on success */
-	for (; time(0)-t0 < TIMEOUT; ) {
-
-		/* Query all configured namservers in parallel */
-		for (i=0; i<rrcnt; i++) if (rr[i]) for (j=0; j<nns; j++) {
-			q[0] = id+i >> 8;
-			q[1] = id+i;
-			q[ql-3] = rr[i];
-			sendto(fd, q, ql, MSG_NOSIGNAL, (void *)&ns[j], sl);
-		}
-
-		/* Wait for a response, or until time to retry */
-		if (poll(&pfd, 1, RETRY) <= 0) continue;
-
-		/* Process any and all replies */
-		while (got+failed < rrcnt && (rlen = recvfrom(fd, r, 512, 0,
-			(void *)&sa, (socklen_t[1]){sl})) >= 2)
-		{
-			/* Ignore replies from addresses we didn't send to */
-			for (i=0; i<nns; i++) if (!memcmp(ns+i, &sa, sl)) break;
-			if (i==nns) continue;
-
-			/* Compute index of the query from id */
-			i = r[0]*256+r[1] - id & 0xffff;
-			if ((unsigned)i >= rrcnt || !rr[i]) continue;
-
-			/* Interpret the result code */
-			switch (r[3] & 15) {
-			case 0:
-				got++;
-				break;
-			case 3:
-				if (1) errcode = EAI_NONAME; else
-			default:
-				errcode = EAI_FAIL;
-				failed++;
-			}
-
-			/* Mark this record as answered */
-			rr[i] = 0;
-			r += 512;
-		}
-
-		/* Check to see if we have answers to all queries */
-		if (got+failed == rrcnt) break;
-	}
-out:
-	pthread_cleanup_pop(1);
-
-	/* Return the number of results, or an error code if none */
-	if (got) return got;
-	return errcode;
-}
-
-static void mkptr4(char *s, const unsigned char *ip)
-{
-	sprintf(s, "%d.%d.%d.%d.in-addr.arpa",
-		ip[3], ip[2], ip[1], ip[0]);
-}
-
-static void mkptr6(char *s, const unsigned char *ip)
-{
-	static const char xdigits[] = "0123456789abcdef";
-	int i;
-	for (i=15; i>=0; i--) {
-		*s++ = xdigits[ip[i]&15]; *s++ = '.';
-		*s++ = xdigits[ip[i]>>4]; *s++ = '.';
-	}
-	strcpy(s, "ip6.arpa");
-}
-
-int __dns_query(unsigned char *r, const void *a, int family, int ptr)
-{
-	char buf[PTR_MAX];
-	int rr[2], rrcnt = 1;
-
-	if (ptr) {
-		if (family == AF_INET6) mkptr6(buf, a);
-		else mkptr4(buf, a);
-		rr[0] = RR_PTR;
-		a = buf;
-	} else if (family == AF_INET6) {
-		rr[0] = RR_AAAA;
-	} else {
-		rr[0] = RR_A;
-		if (family != AF_INET) rr[rrcnt++] = RR_AAAA;
-	}
-
-	return __dns_doqueries(r, a, rr, rrcnt);
-}
-
-int __dn_expand(const unsigned char *, const unsigned char *, const unsigned char *, char *, int);
-
-int __dns_get_rr(void *dest, size_t stride, size_t maxlen, size_t limit, const unsigned char *r, int rr, int dec)
-{
-	int qdcount, ancount;
-	const unsigned char *p;
-	char tmp[256];
-	int found = 0;
-	int len;
-
-	if ((r[3]&15)) return 0;
-	p = r+12;
-	qdcount = r[4]*256 + r[5];
-	ancount = r[6]*256 + r[7];
-	if (qdcount+ancount > 64) return -1;
-	while (qdcount--) {
-		while (p-r < 512 && *p-1U < 127) p++;
-		if (*p>193 || (*p==193 && p[1]>254) || p>r+506)
-			return -1;
-		p += 5 + !!*p;
-	}
-	while (ancount--) {
-		while (p-r < 512 && *p-1U < 127) p++;
-		if (*p>193 || (*p==193 && p[1]>254) || p>r+506)
-			return -1;
-		p += 1 + !!*p;
-		len = p[8]*256 + p[9];
-		if (p+len > r+512) return -1;
-		if (p[1]==rr && len <= maxlen) {
-			if (dec && __dn_expand(r, r+512, p+10, tmp, sizeof tmp)<0)
-				return -1;
-			if (dest && limit) {
-				if (dec) strcpy(dest, tmp);
-				else memcpy(dest, p+10, len);
-				dest = (char *)dest + stride;
-				limit--;
-			}
-			found++;
-		}
-		p += 10 + len;
-	}
-	return found;
-}
-
-int __dns_count_addrs(const unsigned char *r, int cnt)
-{
-	int found=0, res, i;
-	static const int p[2][2] = { { 4, RR_A }, { 16, RR_AAAA } };
-
-	while (cnt--) {
-		for (i=0; i<2; i++) {
-			res = __dns_get_rr(0, 0, p[i][0], -1, r, p[i][1], 0);
-			if (res < 0) return res;
-			found += res;
-		}
-		r += 512;
-	}
-	return found;
-}
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