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authorMichael Orlitzky <mjo@gentoo.org>2016-08-05 09:41:35 -0400
committerMichael Orlitzky <mjo@gentoo.org>2016-08-05 09:41:55 -0400
commite36913e087879c62aaa678f2ba35927a17af9b1c (patch)
tree9cb69c89c1a03787791ff50541bfdb52bb3d1ee8 /net-dns/djbdns/files
parentdev-scheme/greg:add guile-2 patch bug #351991 (diff)
downloadgentoo-e36913e087879c62aaa678f2ba35927a17af9b1c.tar.gz
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net-dns/djbdns: new revision with increased dnscache recursion depth.
There is a hard limit on the number of recursive queries that dnscache will perform. This new revision adds a patch, increasing a loop iteration limit from 100 to 200, and thus increasing the recursion depth. The patch was based on a similar fix for OpenWrt, suggested by John Stile. With the new revision, the ebuild was updated to EAPI=6. The eutils eclass was dropped as "epatch" was replaced with "eapply"; some patches needed new revisions to work with -p1, as eapply does. Two other patches needed revisions to avoid fuzz from the new fix. Gentoo-Bug: 590548 Reported-By: John Stile Package-Manager: portage-2.2.28
Diffstat (limited to 'net-dns/djbdns/files')
-rw-r--r--net-dns/djbdns/files/1.05-errno-r1.patch11
-rw-r--r--net-dns/djbdns/files/CVE2008-4392_0001-dnscache-merge-similar-outgoing-queries-ipv6-test25-r1.patch351
-rw-r--r--net-dns/djbdns/files/CVE2008-4392_0001-dnscache-merge-similar-outgoing-queries-r1.patch349
-rw-r--r--net-dns/djbdns/files/headtail-r1.patch67
-rw-r--r--net-dns/djbdns/files/increase-cname-recustion-depth.patch43
5 files changed, 821 insertions, 0 deletions
diff --git a/net-dns/djbdns/files/1.05-errno-r1.patch b/net-dns/djbdns/files/1.05-errno-r1.patch
new file mode 100644
index 000000000000..58f2f4b6c97a
--- /dev/null
+++ b/net-dns/djbdns/files/1.05-errno-r1.patch
@@ -0,0 +1,11 @@
+--- a/error.h 2001-02-11 15:11:45.000000000 -0600
++++ b/error.h 2003-02-26 02:10:21.000000000 -0600
+@@ -1,7 +1,7 @@
+ #ifndef ERROR_H
+ #define ERROR_H
+
+-extern int errno;
++#include <errno.h>
+
+ extern int error_intr;
+ extern int error_nomem;
diff --git a/net-dns/djbdns/files/CVE2008-4392_0001-dnscache-merge-similar-outgoing-queries-ipv6-test25-r1.patch b/net-dns/djbdns/files/CVE2008-4392_0001-dnscache-merge-similar-outgoing-queries-ipv6-test25-r1.patch
new file mode 100644
index 000000000000..1d132d6d4f5e
--- /dev/null
+++ b/net-dns/djbdns/files/CVE2008-4392_0001-dnscache-merge-similar-outgoing-queries-ipv6-test25-r1.patch
@@ -0,0 +1,351 @@
+diff --git a/Makefile b/Makefile
+index 5ccd647..eee09dd 100644
+--- a/Makefile
++++ b/Makefile
+@@ -346,11 +346,11 @@ stralloc.h iopause.h taia.h tai.h uint64.h taia.h
+ ./compile dns_txt.c
+
+ dnscache: \
+-load dnscache.o droproot.o okclient.o log.o cache.o query.o \
++load dnscache.o droproot.o okclient.o log.o cache.o query.o qmerge.o \
+ response.o dd.o roots.o iopause.o prot.o dns.a env.a alloc.a buffer.a \
+ libtai.a unix.a byte.a socket.lib
+ ./load dnscache droproot.o okclient.o log.o cache.o \
+- query.o response.o dd.o roots.o iopause.o prot.o dns.a \
++ query.o qmerge.o response.o dd.o roots.o iopause.o prot.o dns.a \
+ env.a alloc.a buffer.a libtai.a unix.a byte.a `cat \
+ socket.lib`
+
+@@ -371,7 +371,7 @@ compile dnscache.c env.h exit.h scan.h strerr.h error.h ip4.h \
+ uint16.h uint64.h socket.h uint16.h dns.h stralloc.h gen_alloc.h \
+ iopause.h taia.h tai.h uint64.h taia.h taia.h byte.h roots.h fmt.h \
+ iopause.h query.h dns.h uint32.h alloc.h response.h uint32.h cache.h \
+-uint32.h uint64.h ndelay.h log.h uint64.h okclient.h droproot.h
++uint32.h uint64.h ndelay.h log.h uint64.h okclient.h droproot.h maxclient.h
+ ./compile dnscache.c
+
+ dnsfilter: \
+@@ -749,11 +749,16 @@ qlog.o: \
+ compile qlog.c buffer.h qlog.h uint16.h
+ ./compile qlog.c
+
++qmerge.o: \
++compile qmerge.c qmerge.h dns.h stralloc.h gen_alloc.h iopause.h \
++taia.h tai.h uint64.h log.h maxclient.h
++ ./compile qmerge.c
++
+ query.o: \
+ compile query.c error.h roots.h log.h uint64.h case.h cache.h \
+ uint32.h uint64.h byte.h dns.h stralloc.h gen_alloc.h iopause.h \
+ taia.h tai.h uint64.h taia.h uint64.h uint32.h uint16.h dd.h alloc.h \
+-response.h uint32.h query.h dns.h uint32.h
++response.h uint32.h query.h dns.h uint32.h qmerge.h
+ ./compile query.c
+
+ random-ip: \
+diff --git a/dnscache.c b/dnscache.c
+index abcba69..c84e4b8 100644
+--- a/dnscache.c
++++ b/dnscache.c
+@@ -23,6 +23,7 @@
+ #include "log.h"
+ #include "okclient.h"
+ #include "droproot.h"
++#include "maxclient.h"
+
+ long interface;
+
+@@ -59,7 +60,6 @@ uint64 numqueries = 0;
+
+ static int udp53;
+
+-#define MAXUDP 200
+ static struct udpclient {
+ struct query q;
+ struct taia start;
+@@ -136,7 +136,6 @@ void u_new(void)
+
+ static int tcp53;
+
+-#define MAXTCP 20
+ struct tcpclient {
+ struct query q;
+ struct taia start;
+diff --git a/log.c b/log.c
+index df465e2..1b0d98c 100644
+--- a/log.c
++++ b/log.c
+@@ -149,6 +149,13 @@ void log_tx(const char *q,const char qtype[2],const char *control,const char ser
+ line();
+ }
+
++void log_tx_piggyback(const char *q, const char qtype[2], const char *control)
++{
++ string("txpb ");
++ logtype(qtype); space(); name(q); space(); name(control);
++ line();
++}
++
+ void log_cachedanswer(const char *q,const char type[2])
+ {
+ string("cached "); logtype(type); space();
+diff --git a/log.h b/log.h
+index fe62fa3..d9a829b 100644
+--- a/log.h
++++ b/log.h
+@@ -18,6 +18,7 @@ extern void log_cachednxdomain(const char *);
+ extern void log_cachedns(const char *,const char *);
+
+ extern void log_tx(const char *,const char *,const char *,const char *,unsigned int);
++extern void log_tx_piggyback(const char *,const char *,const char *);
+
+ extern void log_nxdomain(const char *,const char *,unsigned int);
+ extern void log_nodata(const char *,const char *,const char *,unsigned int);
+diff --git a/maxclient.h b/maxclient.h
+new file mode 100644
+index 0000000..e52fcd1
+--- /dev/null
++++ b/maxclient.h
+@@ -0,0 +1,7 @@
++#ifndef MAXCLIENT_H
++#define MAXCLIENT_H
++
++#define MAXUDP 200
++#define MAXTCP 20
++
++#endif /* MAXCLIENT_H */
+diff --git a/qmerge.c b/qmerge.c
+new file mode 100644
+index 0000000..7c92299
+--- /dev/null
++++ b/qmerge.c
+@@ -0,0 +1,115 @@
++#include "qmerge.h"
++#include "byte.h"
++#include "log.h"
++#include "maxclient.h"
++
++#define QMERGE_MAX (MAXUDP+MAXTCP)
++struct qmerge inprogress[QMERGE_MAX];
++
++static
++int qmerge_key_init(struct qmerge_key *qmk, const char *q, const char qtype[2],
++ const char *control)
++{
++ if (!dns_domain_copy(&qmk->q, q)) return 0;
++ byte_copy(qmk->qtype, 2, qtype);
++ if (!dns_domain_copy(&qmk->control, control)) return 0;
++ return 1;
++}
++
++static
++int qmerge_key_equal(struct qmerge_key *a, struct qmerge_key *b)
++{
++ return
++ byte_equal(a->qtype, 2, b->qtype) &&
++ dns_domain_equal(a->q, b->q) &&
++ dns_domain_equal(a->control, b->control);
++}
++
++static
++void qmerge_key_free(struct qmerge_key *qmk)
++{
++ dns_domain_free(&qmk->q);
++ dns_domain_free(&qmk->control);
++}
++
++void qmerge_free(struct qmerge **x)
++{
++ struct qmerge *qm;
++
++ qm = *x;
++ *x = 0;
++ if (!qm || !qm->active) return;
++
++ qm->active--;
++ if (!qm->active) {
++ qmerge_key_free(&qm->key);
++ dns_transmit_free(&qm->dt);
++ }
++}
++
++int qmerge_start(struct qmerge **qm, const char servers[64], int flagrecursive,
++ const char *q, const char qtype[2], const char localip[4],
++ const char *control)
++{
++ struct qmerge_key k;
++ int i;
++ int r;
++
++ qmerge_free(qm);
++
++ byte_zero(&k, sizeof k);
++ if (!qmerge_key_init(&k, q, qtype, control)) return -1;
++ for (i = 0; i < QMERGE_MAX; i++) {
++ if (!inprogress[i].active) continue;
++ if (!qmerge_key_equal(&k, &inprogress[i].key)) continue;
++ log_tx_piggyback(q, qtype, control);
++ inprogress[i].active++;
++ *qm = &inprogress[i];
++ qmerge_key_free(&k);
++ return 0;
++ }
++
++ for (i = 0; i < QMERGE_MAX; i++)
++ if (!inprogress[i].active)
++ break;
++ if (i == QMERGE_MAX) return -1;
++
++ log_tx(q, qtype, control, servers, 0);
++ r = dns_transmit_start(&inprogress[i].dt, servers, flagrecursive, q, qtype, localip);
++ if (r == -1) { qmerge_key_free(&k); return -1; }
++ inprogress[i].active++;
++ inprogress[i].state = 0;
++ qmerge_key_free(&inprogress[i].key);
++ byte_copy(&inprogress[i].key, sizeof k, &k);
++ *qm = &inprogress[i];
++ return 0;
++}
++
++void qmerge_io(struct qmerge *qm, iopause_fd *io, struct taia *deadline)
++{
++ if (qm->state == 0) {
++ dns_transmit_io(&qm->dt, io, deadline);
++ qm->state = 1;
++ }
++ else {
++ io->fd = -1;
++ io->events = 0;
++ }
++}
++
++int qmerge_get(struct qmerge **x, const iopause_fd *io, const struct taia *when)
++{
++ int r;
++ struct qmerge *qm;
++
++ qm = *x;
++ if (qm->state == -1) return -1; /* previous error */
++ if (qm->state == 0) return 0; /* no packet */
++ if (qm->state == 2) return 1; /* already got packet */
++
++ r = dns_transmit_get(&qm->dt, io, when);
++ if (r == -1) { qm->state = -1; return -1; } /* error */
++ if (r == 0) { qm->state = 0; return 0; } /* must wait for i/o */
++ if (r == 1) { qm->state = 2; return 1; } /* got packet */
++ return -1; /* bug */
++}
+diff --git a/qmerge.h b/qmerge.h
+new file mode 100644
+index 0000000..9a58157
+--- /dev/null
++++ b/qmerge.h
+@@ -0,0 +1,24 @@
++#ifndef QMERGE_H
++#define QMERGE_H
++
++#include "dns.h"
++
++struct qmerge_key {
++ char *q;
++ char qtype[2];
++ char *control;
++};
++
++struct qmerge {
++ int active;
++ struct qmerge_key key;
++ struct dns_transmit dt;
++ int state; /* -1 = error, 0 = need io, 1 = need get, 2 = got packet */
++};
++
++extern int qmerge_start(struct qmerge **,const char *,int,const char *,const char *,const char *,const char *);
++extern void qmerge_io(struct qmerge *,iopause_fd *,struct taia *);
++extern int qmerge_get(struct qmerge **,const iopause_fd *,const struct taia *);
++extern void qmerge_free(struct qmerge **);
++
++#endif /* QMERGE_H */
+diff --git a/query.c b/query.c
+index d61b20c..d9be8b8 100644
+--- a/query.c
++++ b/query.c
+@@ -84,7 +84,7 @@ static void cleanup(struct query *z)
+ int j;
+ int k;
+
+- dns_transmit_free(&z->dt);
++ qmerge_free(&z->qm);
+ for (j = 0;j < QUERY_MAXALIAS;++j)
+ dns_domain_free(&z->alias[j]);
+ for (j = 0;j < QUERY_MAXLEVEL;++j) {
+@@ -624,15 +624,9 @@ static int doit(struct query *z,int state)
+ if (j == 256) goto SERVFAIL;
+
+ dns_sortip6(z->servers[z->level],256);
+- if (z->level) {
+- dtype = z->ipv6[z->level] ? DNS_T_AAAA : DNS_T_A;
+- log_tx(z->name[z->level],dtype,z->control[z->level],z->servers[z->level],z->level);
+- if (dns_transmit_start(&z->dt,z->servers[z->level],flagforwardonly,z->name[z->level],dtype,z->localip) == -1) goto DIE;
+- }
+- else {
+- log_tx(z->name[0],z->type,z->control[0],z->servers[0],0);
+- if (dns_transmit_start(&z->dt,z->servers[0],flagforwardonly,z->name[0],z->type,z->localip) == -1) goto DIE;
+- }
++ dtype = z->level ? (z->ipv6[z->level] ? DNS_T_AAAA : DNS_T_A) : z->type;
++ if (qmerge_start(&z->qm,z->servers[z->level],flagforwardonly,z->name[z->level],dtype,z->localip,z->control[z->level]) == -1) goto DIE;
++
+ return 0;
+
+
+@@ -646,10 +640,10 @@ static int doit(struct query *z,int state)
+
+ HAVEPACKET:
+ if (++z->loop == 200) goto DIE;
+- buf = z->dt.packet;
+- len = z->dt.packetlen;
++ buf = z->qm->dt.packet;
++ len = z->qm->dt.packetlen;
+
+- whichserver = z->dt.servers + 16 * z->dt.curserver;
++ whichserver = z->qm->dt.servers + 16 * z->qm->dt.curserver;
+ control = z->control[z->level];
+ d = z->name[z->level];
+ /* dtype = z->level ? DNS_T_A : z->type; */
+@@ -1071,7 +1065,7 @@ int query_start(struct query *z,char *dn,char type[2],char class[2],char localip
+
+ int query_get(struct query *z,iopause_fd *x,struct taia *stamp)
+ {
+- switch(dns_transmit_get(&z->dt,x,stamp)) {
++ switch(qmerge_get(&z->qm,x,stamp)) {
+ case 1:
+ return doit(z,1);
+ case -1:
+@@ -1082,5 +1076,5 @@ int query_get(struct query *z,iopause_fd *x,struct taia *stamp)
+
+ void query_io(struct query *z,iopause_fd *x,struct taia *deadline)
+ {
+- dns_transmit_io(&z->dt,x,deadline);
++ qmerge_io(z->qm,x,deadline);
+ }
+diff --git a/query.h b/query.h
+index 61812aa..93a322e 100644
+--- a/query.h
++++ b/query.h
+@@ -1,7 +1,7 @@
+ #ifndef QUERY_H
+ #define QUERY_H
+
+-#include "dns.h"
++#include "qmerge.h"
+ #include "uint32.h"
+
+ #define QUERY_MAXLEVEL 5
+@@ -22,7 +22,7 @@ struct query {
+ uint32 scope_id;
+ char type[2];
+ char class[2];
+- struct dns_transmit dt;
++ struct qmerge *qm;
+ } ;
+
+ extern int query_start(struct query *,char *,char *,char *,char *,unsigned int);
diff --git a/net-dns/djbdns/files/CVE2008-4392_0001-dnscache-merge-similar-outgoing-queries-r1.patch b/net-dns/djbdns/files/CVE2008-4392_0001-dnscache-merge-similar-outgoing-queries-r1.patch
new file mode 100644
index 000000000000..57e50955e69c
--- /dev/null
+++ b/net-dns/djbdns/files/CVE2008-4392_0001-dnscache-merge-similar-outgoing-queries-r1.patch
@@ -0,0 +1,349 @@
+diff --git a/Makefile b/Makefile
+index 1429643..bc047c0 100644
+--- a/Makefile
++++ b/Makefile
+@@ -318,11 +318,11 @@ stralloc.h iopause.h taia.h tai.h uint64.h taia.h
+ ./compile dns_txt.c
+
+ dnscache: \
+-load dnscache.o droproot.o okclient.o log.o cache.o query.o \
++load dnscache.o droproot.o okclient.o log.o cache.o query.o qmerge.o \
+ response.o dd.o roots.o iopause.o prot.o dns.a env.a alloc.a buffer.a \
+ libtai.a unix.a byte.a socket.lib
+ ./load dnscache droproot.o okclient.o log.o cache.o \
+- query.o response.o dd.o roots.o iopause.o prot.o dns.a \
++ query.o qmerge.o response.o dd.o roots.o iopause.o prot.o dns.a \
+ env.a alloc.a buffer.a libtai.a unix.a byte.a `cat \
+ socket.lib`
+
+@@ -343,7 +343,7 @@ compile dnscache.c env.h exit.h scan.h strerr.h error.h ip4.h \
+ uint16.h uint64.h socket.h uint16.h dns.h stralloc.h gen_alloc.h \
+ iopause.h taia.h tai.h uint64.h taia.h taia.h byte.h roots.h fmt.h \
+ iopause.h query.h dns.h uint32.h alloc.h response.h uint32.h cache.h \
+-uint32.h uint64.h ndelay.h log.h uint64.h okclient.h droproot.h
++uint32.h uint64.h ndelay.h log.h uint64.h okclient.h droproot.h maxclient.h
+ ./compile dnscache.c
+
+ dnsfilter: \
+@@ -687,11 +687,16 @@ qlog.o: \
+ compile qlog.c buffer.h qlog.h uint16.h
+ ./compile qlog.c
+
++qmerge.o: \
++compile qmerge.c qmerge.h dns.h stralloc.h gen_alloc.h iopause.h \
++taia.h tai.h uint64.h log.h maxclient.h
++ ./compile qmerge.c
++
+ query.o: \
+ compile query.c error.h roots.h log.h uint64.h case.h cache.h \
+ uint32.h uint64.h byte.h dns.h stralloc.h gen_alloc.h iopause.h \
+ taia.h tai.h uint64.h taia.h uint64.h uint32.h uint16.h dd.h alloc.h \
+-response.h uint32.h query.h dns.h uint32.h
++response.h uint32.h query.h dns.h uint32.h qmerge.h
+ ./compile query.c
+
+ random-ip: \
+diff --git a/dnscache.c b/dnscache.c
+index 8c899a3..5ccb16a 100644
+--- a/dnscache.c
++++ b/dnscache.c
+@@ -22,6 +22,7 @@
+ #include "log.h"
+ #include "okclient.h"
+ #include "droproot.h"
++#include "maxclient.h"
+
+ static int packetquery(char *buf,unsigned int len,char **q,char qtype[2],char qclass[2],char id[2])
+ {
+@@ -54,7 +55,6 @@ uint64 numqueries = 0;
+
+ static int udp53;
+
+-#define MAXUDP 200
+ static struct udpclient {
+ struct query q;
+ struct taia start;
+@@ -131,7 +131,6 @@ void u_new(void)
+
+ static int tcp53;
+
+-#define MAXTCP 20
+ struct tcpclient {
+ struct query q;
+ struct taia start;
+diff --git a/log.c b/log.c
+index c43e8b0..b8cd7ce 100644
+--- a/log.c
++++ b/log.c
+@@ -150,6 +150,13 @@ void log_tx(const char *q,const char qtype[2],const char *control,const char ser
+ line();
+ }
+
++void log_tx_piggyback(const char *q, const char qtype[2], const char *control)
++{
++ string("txpb ");
++ logtype(qtype); space(); name(q); space(); name(control);
++ line();
++}
++
+ void log_cachedanswer(const char *q,const char type[2])
+ {
+ string("cached "); logtype(type); space();
+diff --git a/log.h b/log.h
+index fe62fa3..d9a829b 100644
+--- a/log.h
++++ b/log.h
+@@ -18,6 +18,7 @@ extern void log_cachednxdomain(const char *);
+ extern void log_cachedns(const char *,const char *);
+
+ extern void log_tx(const char *,const char *,const char *,const char *,unsigned int);
++extern void log_tx_piggyback(const char *,const char *,const char *);
+
+ extern void log_nxdomain(const char *,const char *,unsigned int);
+ extern void log_nodata(const char *,const char *,const char *,unsigned int);
+diff --git a/maxclient.h b/maxclient.h
+new file mode 100644
+index 0000000..e52fcd1
+--- /dev/null
++++ b/maxclient.h
+@@ -0,0 +1,7 @@
++#ifndef MAXCLIENT_H
++#define MAXCLIENT_H
++
++#define MAXUDP 200
++#define MAXTCP 20
++
++#endif /* MAXCLIENT_H */
+diff --git a/qmerge.c b/qmerge.c
+new file mode 100644
+index 0000000..7c92299
+--- /dev/null
++++ b/qmerge.c
+@@ -0,0 +1,115 @@
++#include "qmerge.h"
++#include "byte.h"
++#include "log.h"
++#include "maxclient.h"
++
++#define QMERGE_MAX (MAXUDP+MAXTCP)
++struct qmerge inprogress[QMERGE_MAX];
++
++static
++int qmerge_key_init(struct qmerge_key *qmk, const char *q, const char qtype[2],
++ const char *control)
++{
++ if (!dns_domain_copy(&qmk->q, q)) return 0;
++ byte_copy(qmk->qtype, 2, qtype);
++ if (!dns_domain_copy(&qmk->control, control)) return 0;
++ return 1;
++}
++
++static
++int qmerge_key_equal(struct qmerge_key *a, struct qmerge_key *b)
++{
++ return
++ byte_equal(a->qtype, 2, b->qtype) &&
++ dns_domain_equal(a->q, b->q) &&
++ dns_domain_equal(a->control, b->control);
++}
++
++static
++void qmerge_key_free(struct qmerge_key *qmk)
++{
++ dns_domain_free(&qmk->q);
++ dns_domain_free(&qmk->control);
++}
++
++void qmerge_free(struct qmerge **x)
++{
++ struct qmerge *qm;
++
++ qm = *x;
++ *x = 0;
++ if (!qm || !qm->active) return;
++
++ qm->active--;
++ if (!qm->active) {
++ qmerge_key_free(&qm->key);
++ dns_transmit_free(&qm->dt);
++ }
++}
++
++int qmerge_start(struct qmerge **qm, const char servers[64], int flagrecursive,
++ const char *q, const char qtype[2], const char localip[4],
++ const char *control)
++{
++ struct qmerge_key k;
++ int i;
++ int r;
++
++ qmerge_free(qm);
++
++ byte_zero(&k, sizeof k);
++ if (!qmerge_key_init(&k, q, qtype, control)) return -1;
++ for (i = 0; i < QMERGE_MAX; i++) {
++ if (!inprogress[i].active) continue;
++ if (!qmerge_key_equal(&k, &inprogress[i].key)) continue;
++ log_tx_piggyback(q, qtype, control);
++ inprogress[i].active++;
++ *qm = &inprogress[i];
++ qmerge_key_free(&k);
++ return 0;
++ }
++
++ for (i = 0; i < QMERGE_MAX; i++)
++ if (!inprogress[i].active)
++ break;
++ if (i == QMERGE_MAX) return -1;
++
++ log_tx(q, qtype, control, servers, 0);
++ r = dns_transmit_start(&inprogress[i].dt, servers, flagrecursive, q, qtype, localip);
++ if (r == -1) { qmerge_key_free(&k); return -1; }
++ inprogress[i].active++;
++ inprogress[i].state = 0;
++ qmerge_key_free(&inprogress[i].key);
++ byte_copy(&inprogress[i].key, sizeof k, &k);
++ *qm = &inprogress[i];
++ return 0;
++}
++
++void qmerge_io(struct qmerge *qm, iopause_fd *io, struct taia *deadline)
++{
++ if (qm->state == 0) {
++ dns_transmit_io(&qm->dt, io, deadline);
++ qm->state = 1;
++ }
++ else {
++ io->fd = -1;
++ io->events = 0;
++ }
++}
++
++int qmerge_get(struct qmerge **x, const iopause_fd *io, const struct taia *when)
++{
++ int r;
++ struct qmerge *qm;
++
++ qm = *x;
++ if (qm->state == -1) return -1; /* previous error */
++ if (qm->state == 0) return 0; /* no packet */
++ if (qm->state == 2) return 1; /* already got packet */
++
++ r = dns_transmit_get(&qm->dt, io, when);
++ if (r == -1) { qm->state = -1; return -1; } /* error */
++ if (r == 0) { qm->state = 0; return 0; } /* must wait for i/o */
++ if (r == 1) { qm->state = 2; return 1; } /* got packet */
++ return -1; /* bug */
++}
+diff --git a/qmerge.h b/qmerge.h
+new file mode 100644
+index 0000000..9a58157
+--- /dev/null
++++ b/qmerge.h
+@@ -0,0 +1,24 @@
++#ifndef QMERGE_H
++#define QMERGE_H
++
++#include "dns.h"
++
++struct qmerge_key {
++ char *q;
++ char qtype[2];
++ char *control;
++};
++
++struct qmerge {
++ int active;
++ struct qmerge_key key;
++ struct dns_transmit dt;
++ int state; /* -1 = error, 0 = need io, 1 = need get, 2 = got packet */
++};
++
++extern int qmerge_start(struct qmerge **,const char *,int,const char *,const char *,const char *,const char *);
++extern void qmerge_io(struct qmerge *,iopause_fd *,struct taia *);
++extern int qmerge_get(struct qmerge **,const iopause_fd *,const struct taia *);
++extern void qmerge_free(struct qmerge **);
++
++#endif /* QMERGE_H */
+diff --git a/query.c b/query.c
+index 46cdc00..f091fdd 100644
+--- a/query.c
++++ b/query.c
+@@ -81,7 +81,7 @@ static void cleanup(struct query *z)
+ int j;
+ int k;
+
+- dns_transmit_free(&z->dt);
++ qmerge_free(&z->qm);
+ for (j = 0;j < QUERY_MAXALIAS;++j)
+ dns_domain_free(&z->alias[j]);
+ for (j = 0;j < QUERY_MAXLEVEL;++j) {
+@@ -429,14 +429,8 @@ static int doit(struct query *z,int state)
+ if (j == 64) goto SERVFAIL;
+
+ dns_sortip(z->servers[z->level],64);
+- if (z->level) {
+- log_tx(z->name[z->level],DNS_T_A,z->control[z->level],z->servers[z->level],z->level);
+- if (dns_transmit_start(&z->dt,z->servers[z->level],flagforwardonly,z->name[z->level],DNS_T_A,z->localip) == -1) goto DIE;
+- }
+- else {
+- log_tx(z->name[0],z->type,z->control[0],z->servers[0],0);
+- if (dns_transmit_start(&z->dt,z->servers[0],flagforwardonly,z->name[0],z->type,z->localip) == -1) goto DIE;
+- }
++ dtype = z->level ? DNS_T_A : z->type;
++ if (qmerge_start(&z->qm,z->servers[z->level],flagforwardonly,z->name[z->level],dtype,z->localip,z->control[z->level]) == -1) goto DIE;
+ return 0;
+
+
+@@ -450,10 +444,10 @@ static int doit(struct query *z,int state)
+
+ HAVEPACKET:
+ if (++z->loop == 200) goto DIE;
+- buf = z->dt.packet;
+- len = z->dt.packetlen;
++ buf = z->qm->dt.packet;
++ len = z->qm->dt.packetlen;
+
+- whichserver = z->dt.servers + 4 * z->dt.curserver;
++ whichserver = z->qm->dt.servers + 4 * z->qm->dt.curserver;
+ control = z->control[z->level];
+ d = z->name[z->level];
+ dtype = z->level ? DNS_T_A : z->type;
+@@ -836,7 +830,7 @@ int query_start(struct query *z,char *dn,char type[2],char class[2],char localip
+
+ int query_get(struct query *z,iopause_fd *x,struct taia *stamp)
+ {
+- switch(dns_transmit_get(&z->dt,x,stamp)) {
++ switch(qmerge_get(&z->qm,x,stamp)) {
+ case 1:
+ return doit(z,1);
+ case -1:
+@@ -847,5 +841,5 @@ int query_get(struct query *z,iopause_fd *x,struct taia *stamp)
+
+ void query_io(struct query *z,iopause_fd *x,struct taia *deadline)
+ {
+- dns_transmit_io(&z->dt,x,deadline);
++ qmerge_io(z->qm,x,deadline);
+ }
+diff --git a/query.h b/query.h
+index eff68b2..06feab4 100644
+--- a/query.h
++++ b/query.h
+@@ -1,7 +1,7 @@
+ #ifndef QUERY_H
+ #define QUERY_H
+
+-#include "dns.h"
++#include "qmerge.h"
+ #include "uint32.h"
+
+ #define QUERY_MAXLEVEL 5
+@@ -20,7 +20,7 @@ struct query {
+ char localip[4];
+ char type[2];
+ char class[2];
+- struct dns_transmit dt;
++ struct qmerge *qm;
+ } ;
+
+ extern int query_start(struct query *,char *,char *,char *,char *);
diff --git a/net-dns/djbdns/files/headtail-r1.patch b/net-dns/djbdns/files/headtail-r1.patch
new file mode 100644
index 000000000000..31854803ba89
--- /dev/null
+++ b/net-dns/djbdns/files/headtail-r1.patch
@@ -0,0 +1,67 @@
+diff -Naur /tmp/djbdns-1.05/Makefile djbdns-1.05/Makefile
+--- a/Makefile 2003-11-16 20:33:41.000000000 +0100
++++ b/Makefile 2003-11-16 20:35:15.000000000 +0100
+@@ -31,7 +31,7 @@
+
+ auto_home.c: \
+ auto-str conf-home
+- ./auto-str auto_home `head -1 conf-home` > auto_home.c
++ ./auto-str auto_home `head -n 1 conf-home` > auto_home.c
+
+ auto_home.o: \
+ compile auto_home.c
+@@ -205,14 +205,14 @@
+ choose: \
+ warn-auto.sh choose.sh conf-home
+ cat warn-auto.sh choose.sh \
+- | sed s}HOME}"`head -1 conf-home`"}g \
++ | sed s}HOME}"`head -n 1 conf-home`"}g \
+ > choose
+ chmod 755 choose
+
+ compile: \
+ warn-auto.sh conf-cc
+ ( cat warn-auto.sh; \
+- echo exec "`head -1 conf-cc`" '-c $${1+"$$@"}' \
++ echo exec "`head -n 1 conf-cc`" '-c $${1+"$$@"}' \
+ ) > compile
+ chmod 755 compile
+
+@@ -449,7 +449,7 @@
+ dnstracesort: \
+ warn-auto.sh dnstracesort.sh conf-home
+ cat warn-auto.sh dnstracesort.sh \
+- | sed s}HOME}"`head -1 conf-home`"}g \
++ | sed s}HOME}"`head -n 1 conf-home`"}g \
+ > dnstracesort
+ chmod 755 dnstracesort
+
+@@ -570,7 +570,7 @@
+ warn-auto.sh conf-ld
+ ( cat warn-auto.sh; \
+ echo 'main="$$1"; shift'; \
+- echo exec "`head -1 conf-ld`" \
++ echo exec "`head -n 1 conf-ld`" \
+ '-o "$$main" "$$main".o $${1+"$$@"}' \
+ ) > load
+ chmod 755 load
+@@ -758,7 +758,7 @@
+ rts: \
+ warn-auto.sh rts.sh conf-home
+ cat warn-auto.sh rts.sh \
+- | sed s}HOME}"`head -1 conf-home`"}g \
++ | sed s}HOME}"`head -n 1 conf-home`"}g \
+ > rts
+ chmod 755 rts
+
+@@ -901,8 +901,8 @@
+ systype: \
+ find-systype.sh conf-cc conf-ld trycpp.c x86cpuid.c
+ ( cat warn-auto.sh; \
+- echo CC=\'`head -1 conf-cc`\'; \
+- echo LD=\'`head -1 conf-ld`\'; \
++ echo CC=\'`head -n 1 conf-cc`\'; \
++ echo LD=\'`head -n 1 conf-ld`\'; \
+ cat find-systype.sh; \
+ ) | sh > systype
+
diff --git a/net-dns/djbdns/files/increase-cname-recustion-depth.patch b/net-dns/djbdns/files/increase-cname-recustion-depth.patch
new file mode 100644
index 000000000000..3415f6567056
--- /dev/null
+++ b/net-dns/djbdns/files/increase-cname-recustion-depth.patch
@@ -0,0 +1,43 @@
+From d8534e8482bdd3f6e4ae1dca8452e65c24dd34f7 Mon Sep 17 00:00:00 2001
+From: Michael Orlitzky <michael@orlitzky.com>
+Date: Fri, 5 Aug 2016 09:13:11 -0400
+Subject: [PATCH 1/1] query.c: increase recursion depth to 200.
+
+The recursion loop for CNAME resolution has an upper limit of 100
+iterations by default. This has proven too small in some cases where
+large CDNs are concerned. This commit increases the limit to 200.
+
+The patch was based on the OpenWrt fix, supplied by user ylxu.
+
+Gentoo-Bug: 590548
+OpenWrt-Bug: 5881
+SMEServer-Bug: 8362
+---
+ query.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/query.c b/query.c
+index 46cdc00..61fe708 100644
+--- a/query.c
++++ b/query.c
+@@ -203,7 +203,7 @@ static int doit(struct query *z,int state)
+
+
+ NEWNAME:
+- if (++z->loop == 100) goto DIE;
++ if (++z->loop == 200) goto DIE;
+ d = z->name[z->level];
+ dtype = z->level ? DNS_T_A : z->type;
+ dlen = dns_domain_length(d);
+@@ -449,7 +449,7 @@ static int doit(struct query *z,int state)
+
+
+ HAVEPACKET:
+- if (++z->loop == 100) goto DIE;
++ if (++z->loop == 200) goto DIE;
+ buf = z->dt.packet;
+ len = z->dt.packetlen;
+
+--
+2.7.3
+