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proxy.c
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proxy.c
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/*
* Copyright (c) 2018, 2019, 2020 Tim Kuijsten
*
* Permission to use, copy, modify, and distribute this software for any purpose
* with or without fee is hereby granted, provided that the above copyright
* notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/event.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <assert.h>
#include <errno.h>
#include <netinet/in.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "util.h"
#include "wireprot.h"
#include "wiresep.h"
#define MINDATA (1 << 21) /* cap minimum malloc(3) and mmap(2) to 2 MB */
#define MAXSTACK (1 << 15) /* 32 KB should be enough */
#ifdef DEBUG
#define MAXCORE (1024 * 1024 * 10)
#else
#define MAXCORE 0
#endif
void proxy_loginfo(void);
extern int background, verbose;
/*
* A mapping between a IPC or a server socket. If listenaddr is set this is a
* server socket, if it is not set this is an IPC socket.
*/
struct sockmap {
int s;
struct ifn *ifn;
union sockaddr_inet *listenaddr;
};
/*
* All session ids in both the sessmap and peer structures are in 64 bits in
* host byte order. This is to represent the inactive session -1. All incoming
* messages over the listening sockets and ipc are in wire format which is
* little-endian.
*/
struct sessmap {
int64_t sessid; /* host byte order */
struct peer *peer;
};
struct peer {
uint32_t id;
int64_t sesstent; /* host byte order */
int64_t sessnext; /* host byte order */
int64_t sesscurr; /* host byte order */
int64_t sessprev; /* host byte order */
size_t sent;
size_t sentsz;
size_t recv;
size_t recvsz;
};
struct ifn {
uint32_t id;
int port;
char *ifname; /* null terminated name of the interface */
union sockaddr_inet **listenaddrs;
size_t listenaddrssize;
wskey mac1key;
wskey cookiekey;
struct peer **peers;
size_t peerssize;
struct sessmap **sessmapv;
size_t sessmapvsize;
};
static uid_t uid;
static gid_t gid;
static int eport;
static struct ifn **ifnv;
static size_t ifnvsize;
static uint8_t msg[MAXSCRATCH];
static union sockaddr_inet peeraddr;
/* mapping of server sockets to listenaddr or ifn */
static struct sockmap **sockmapv;
static size_t sockmapvsize;
static size_t totalfwdifn, totalfwdifnsz, totalfwdenc, totalfwdencsz, totalrecv,
totalrecvsz, corrupted, invalidmac, invalidpeer;
static int logstats, doterm;
static int
sortsessmapv(const void *a, const void *b)
{
const struct sessmap *x = *(const struct sessmap **)a;
const struct sessmap *y = *(const struct sessmap **)b;
if (x->sessid == y->sessid)
return 0;
if (x->sessid < y->sessid)
return -1;
return 1;
}
static void
sort(struct sessmap **sessmapv, size_t sessmapvsize)
{
qsort(sessmapv, sessmapvsize, sizeof(*sessmapv), sortsessmapv);
}
/*
* Return the index of "sessid" in the sorted array "sessmapv" or -1 if not
* found.
*/
static int
sessmapvsearch(struct sessmap **sessmapv, size_t sessmapvsize, int64_t sessid)
{
int i, offset;
offset = 0;
while (sessmapvsize) {
/* ceil of middle index */
i = ((sessmapvsize + 1) / 2) - 1;
if (sessid == sessmapv[offset + i]->sessid) {
return offset + i;
} else if (sessid > sessmapv[offset + i]->sessid) {
offset = offset + i + 1;
} else {
sessmapvsize--;
}
/* floor */
sessmapvsize /= 2;
}
return -1;
}
static void
handlesig(int signo)
{
switch (signo) {
case SIGUSR1:
logstats = 1;
break;
case SIGINT:
/* FALLTHROUGH */
case SIGTERM:
doterm = 1;
break;
default:
logwarnx("proxy unexpected signal %d %s", signo,
strsignal(signo));
break;
}
}
/*
* Find a socket mapping by socket descriptor. Return 1 if found and updates
* "sockmap" to point to it. 0 if not found and updates "sockmap" to NULL.
*
* XXX log(n)
*/
static int
findsockmapbysock(struct sockmap **sockmap, int s)
{
size_t n;
*sockmap = NULL;
for (n = 0; n < sockmapvsize; n++) {
if (s == sockmapv[n]->s) {
*sockmap = sockmapv[n];
return 1;
}
}
return 0;
}
/*
* Find a peer by id and interface. Return 1 if found and updates "p" to point
* to it. 0 if not found and updates "p" to NULL.
*/
static int
findpeerbyidandifn(struct peer **p, uint32_t peerid, const struct ifn *ifn)
{
*p = NULL;
if (peerid >= ifn->peerssize)
return 0;
*p = ifn->peers[peerid];
return 1;
}
/*
* Find a session by "sessid". Return 1 if found and updates "peer" to
* point to it. 0 if not found and updates "peer" to NULL.
*/
static int
findpeerbysessidandifn(struct peer **peer, const struct ifn *ifn,
int64_t sessid)
{
int sessidx;
sessidx = sessmapvsearch(ifn->sessmapv, ifn->sessmapvsize, sessid);
if (sessidx == -1) {
*peer = NULL;
return 0;
}
*peer = ifn->sessmapv[sessidx]->peer;
return 1;
}
/*
* Replace session id "oid" with "nid".
*
* O(log(n) + n * log(n))
*
* Return 0 on success, -1 if "oid" does not exist.
*/
static int
sessmapvreplace(const struct ifn *ifn, struct peer *peer, int64_t oid,
int64_t nid)
{
int sessidx;
sessidx = sessmapvsearch(ifn->sessmapv, ifn->sessmapvsize, oid);
if (sessidx == -1) {
if (verbose > 0)
lognoticex("proxy %s %llx old session id %llx not found",
ifn->ifname, nid, oid);
return -1;
}
ifn->sessmapv[sessidx]->sessid = nid;
ifn->sessmapv[sessidx]->peer = peer;
if (nid == oid) {
if (verbose > 0)
lognoticex("proxy %s %llx old and new session ids are "
"equal", ifn->ifname, nid);
} else if (nid > oid) {
if (verbose > 1)
loginfox("proxy %s %08x replaced %08x", ifn->ifname,
(uint32_t)nid, (uint32_t)oid);
sort(&ifn->sessmapv[sessidx], ifn->sessmapvsize - sessidx);
} else {
if (verbose > 1)
loginfox("proxy %s %08x replaced %08x", ifn->ifname,
(uint32_t)nid, (uint32_t)oid);
sort(ifn->sessmapv, sessidx + 1);
}
return 0;
}
/*
* Receive and handle a message from an ifn process.
*
* SESSID
* new session established, register with interface and peer.
*
* Return 0 on success, -1 on error.
*/
static int
handleifnmsg(const struct sockmap *sockmap)
{
struct msgsessid *msi;
struct ifn *ifn;
struct peer *peer;
size_t msgsize;
unsigned char mtcode;
uint32_t peerid;
int64_t *sessidp, sessid;
ifn = sockmap->ifn;
msgsize = sizeof(msg);
if (wire_recvpeeridmsg(ifn->port, &peerid, &mtcode, msg, &msgsize)
== -1) {
logwarnx("proxy %s wire_recvpeeridmsg error", ifn->ifname);
return -1;
}
if (!findpeerbyidandifn(&peer, peerid, ifn)) {
logwarnx("proxy %s unknown peerid %u", ifn->ifname, peerid);
return -1;
}
switch (mtcode) {
case MSGSESSID:
msi = (struct msgsessid *)msg;
sessid = le32toh(msi->sessid);
if (verbose > 2)
logdebugx("proxy %s %x type %u received", ifn->ifname,
sessid, msi->type);
switch (msi->type) {
case SESSIDDESTROY:
if (sessid == peer->sesstent) {
sessidp = &peer->sesstent;
} else if (sessid == peer->sessnext) {
sessidp = &peer->sessnext;
} else if (sessid == peer->sesscurr) {
sessidp = &peer->sesscurr;
} else if (sessid == peer->sessprev) {
sessidp = &peer->sessprev;
} else {
logwarnx("proxy %s %x could not destroy "
"session for peer %u, session id not found",
ifn->ifname, sessid, peer->id);
break;
}
if (sessmapvreplace(ifn, peer, sessid, -1) == -1)
logwarn("proxy %s %x could not remove session",
ifn->ifname, sessid);
*sessidp = -1;
break;
case SESSIDTENT:
if (sessmapvreplace(ifn, peer, peer->sesstent, sessid)
== -1)
logwarn("proxy %s %llx tentative session not "
"found", ifn->ifname, peer->sesstent);
peer->sesstent = sessid;
break;
case SESSIDNEXT:
if (sessmapvreplace(ifn, peer, peer->sessnext, sessid)
== -1)
logwarn("proxy %s %llx next session not found",
ifn->ifname, peer->sessnext);
peer->sessnext = sessid;
break;
case SESSIDCURR:
if (sessid == peer->sesstent) {
sessidp = &peer->sesstent;
} else if (sessid == peer->sessnext) {
sessidp = &peer->sessnext;
} else {
logwarnx("proxy %s %x new current session for "
"peer %u was not tentative or next",
ifn->ifname, sessid, peer->id);
break;
}
/*
* if prev, destroy
* if curr, rotate to prev
* if new == tent
* curr = tent
* tent = -1
* if new == next
* curr = next
* next = -1
* curr = new
*/
if (peer->sessprev != -1)
if (sessmapvreplace(ifn, peer, peer->sessprev,
-1) == -1)
logwarn("proxy %s %llx previous session"
" not found", ifn->ifname,
peer->sessprev);
if (peer->sesscurr != -1)
peer->sessprev = peer->sesscurr;
peer->sesscurr = sessid;
*sessidp = -1;
break;
}
break;
default:
logwarnx("proxy %s unexpected message type %u from ifn",
ifn->ifname, mtcode);
return -1;
}
return 0;
}
/*
* Receive and handle a message from the Internet.
*
* MSGWGINIT
* If mac1 OK, forward to enclave
* MSGWGRESP
* If mac1 OK and session exists, forward to enclave
* MSGWGCOOKIE
* If mac1 OK and session exists, forward to enclave
* MSGWGDATA
* If mac1 OK and session exists, forward to interface process
*
* TODO handle EWOULDBLOCK / create cookies
*
* Return 0 on success, -1 on error.
*/
static int
handlesockmsg(const struct sockmap *sockmap)
{
char verbosepeeraddr[MAXADDRSTR];
struct msgwginit *mwi;
struct msgwgresp *mwr;
struct msgwgdatahdr *mwdhdr;
struct ifn *ifn;
struct peer *peer;
ssize_t rc;
size_t msgsize;
unsigned char mtcode;
socklen_t peeraddrsize;
ifn = sockmap->ifn;
peeraddrsize = sizeof(peeraddr);
rc = recvfrom(sockmap->s, msg, sizeof(msg), 0,
(struct sockaddr *)&peeraddr, &peeraddrsize);
if (rc == -1) {
if (verbose > -1)
logwarn("proxy %s recvfrom error", ifn->ifname);
return -1;
}
if (rc < 1) {
if (verbose > -1)
logwarnx("proxy %s recvfrom zero read error",
ifn->ifname);
return -1;
}
msgsize = rc;
totalrecv++;
totalrecvsz += msgsize;
if (verbose > 0) {
addrtostr(verbosepeeraddr, sizeof verbosepeeraddr,
(struct sockaddr *)&peeraddr, 0);
} else {
verbosepeeraddr[0] = '\0';
}
mtcode = msg[0];
if (mtcode >= MTNCODES) {
if (verbose > 0)
lognoticex("proxy %s received message from %s with "
"unexpected message code %d", ifn->ifname,
verbosepeeraddr, mtcode);
corrupted++;
return -1;
}
if (msgtypes[mtcode].varsize) {
if (msgsize < msgtypes[mtcode].size) {
if (verbose > 0)
lognoticex("proxy %s received message from %s"
" with an invalid message size, expected at"
" least %zu bytes instead of %zu",
ifn->ifname, verbosepeeraddr,
msgtypes[1].size, msgsize);
corrupted++;
return -1;
}
} else if (msgsize != msgtypes[mtcode].size) {
if (verbose > 0)
lognoticex("proxy %s received message from %s with an "
"invalid message size, expected %zu bytes instead "
"of %zu", ifn->ifname, verbosepeeraddr,
msgtypes[1].size, msgsize);
corrupted++;
return -1;
}
if (verbose > 1) {
if (mtcode == MSGWGINIT) {
loginfox("proxy %s received init message from %s",
ifn->ifname, verbosepeeraddr);
} else if (mtcode == MSGWGRESP) {
loginfox("proxy %s received response message from %s",
ifn->ifname, verbosepeeraddr);
} else if (mtcode == MSGWGCOOKIE) {
loginfox("proxy %s received cookie message from %s",
ifn->ifname, verbosepeeraddr);
} else if (mtcode == MSGWGDATA) {
loginfox("proxy %s received data from %s (%zu bytes)",
ifn->ifname, verbosepeeraddr, msgsize);
} else {
loginfox("proxy %s received message type %u from %s "
"(%zu bytes)", ifn->ifname, mtcode, verbosepeeraddr,
msgsize);
}
}
switch (mtcode) {
case MSGWGINIT:
mwi = (struct msgwginit *)msg;
if (!ws_validmac(mwi->mac1, sizeof(mwi->mac1), mwi,
MAC1OFFSETINIT, ifn->mac1key)) {
if (verbose > 0)
lognoticex("proxy %s received init message from"
" %s with invalid mac1", ifn->ifname,
verbosepeeraddr);
invalidmac++;
return -1;
}
if (wire_proxysendmsg(eport, ifn->id, sockmap->listenaddr,
&peeraddr, mtcode, msg, msgsize) == -1) {
logwarn("proxy %s error when trying to forward init "
"message from %s to enclave", ifn->ifname,
verbosepeeraddr);
return -1;
}
totalfwdenc++;
totalfwdencsz += msgsize;
break;
case MSGWGRESP:
mwr = (struct msgwgresp *)msg;
if (!findpeerbysessidandifn(&peer, ifn,
le32toh(mwr->receiver))) {
if (verbose > 0)
lognoticex("proxy %s received response message "
"from peer with unknown receiver %x",
ifn->ifname, le32toh(mwr->receiver));
invalidpeer++;
return -1;
}
if (!ws_validmac(mwr->mac1, sizeof(mwr->mac1), mwr,
MAC1OFFSETRESP, ifn->mac1key)) {
if (verbose > 0)
lognoticex("proxy %s received response message "
"from %s with invalid mac1", ifn->ifname,
verbosepeeraddr);
invalidmac++;
return -1;
}
if (wire_proxysendmsg(eport, ifn->id, sockmap->listenaddr,
&peeraddr, mtcode, msg, msgsize) == -1) {
logwarn("proxy %s error when trying to forward response"
" message from %s to enclave", ifn->ifname,
verbosepeeraddr);
return -1;
}
totalfwdenc++;
totalfwdencsz += msgsize;
break;
case MSGWGCOOKIE:
/* TODO */
break;
case MSGWGDATA:
mwdhdr = (struct msgwgdatahdr *)msg;
if (!findpeerbysessidandifn(&peer, ifn,
le32toh(mwdhdr->receiver))) {
if (verbose > 0)
lognoticex("proxy %s received data from peer "
"with unknown receiver %x", ifn->ifname,
le32toh(mwdhdr->receiver));
invalidpeer++;
return -1;
}
peer->recv++;
peer->recvsz += msgsize;
if (wire_proxysendmsg(ifn->port, ifn->id, sockmap->listenaddr,
&peeraddr, mtcode, msg, msgsize) == -1) {
logwarn("proxy %s error when trying to forward data "
"message from %s to ifn", ifn->ifname,
verbosepeeraddr);
return -1;
}
peer->sent++;
peer->sentsz += msgsize;
totalfwdifn++;
totalfwdifnsz += msgsize;
break;
default:
if (verbose > 1)
loginfox("proxy %s received unsupported message type "
"%d from %s", ifn->ifname, mtcode, verbosepeeraddr);
corrupted++;
return -1;
}
return 0;
}
/*
* Listen for messages on the server sockets or from the ifn processes.
*
* Won't return on success.
*
* TODO: MSGWGCOOKIE -> usock
*/
void
proxy_serv(void)
{
struct sockmap *sockmap;
struct kevent *ev;
size_t evsize, n;
int i, kq, nev;
/*
* Setup listeners for each IPC and UDP socket.
*/
if ((kq = kqueue()) == -1) {
logwarn("proxy kqueue error");
exit(1);
}
evsize = sockmapvsize;
if ((ev = calloc(evsize, sizeof(*ev))) == NULL) {
logwarn("proxy calloc evsize error");
exit(1);
}
for (n = 0; n < sockmapvsize; n++)
EV_SET(&ev[n], sockmapv[n]->s, EVFILT_READ, EV_ADD, 0, 0, NULL);
if ((nev = kevent(kq, ev, evsize, NULL, 0, NULL)) == -1) {
logwarn("proxy kevent error");
exit(1);
}
for (;;) {
if (logstats) {
proxy_loginfo();
logstats = 0;
}
if (doterm) {
if (verbose > 1)
loginfox("proxy received termination signal, "
"shutting down");
exit(1);
}
if ((nev = kevent(kq, NULL, 0, ev, evsize, NULL)) == -1) {
if (errno == EINTR) {
continue;
} else {
logwarn("proxy kevent error");
exit(1);
}
}
if (verbose > 2)
logdebugx("proxy %d events", nev);
for (i = 0; i < nev; i++) {
if (!findsockmapbysock(&sockmap, ev[i].ident)) {
if (verbose > -1)
logwarnx("proxy socket event not found:"
" %lu", ev[i].ident);
continue;
}
if (sockmap->listenaddr) {
if (ev[i].flags & EV_EOF) {
if (verbose > -1)
logwarnx("proxy %s server "
"socket eof",
sockmap->ifn->ifname);
if (close(sockmap->s) == -1) {
logwarn("proxy %s close "
"server socket error",
sockmap->ifn->ifname);
exit(1);
}
break;
}
handlesockmsg(sockmap);
break;
} else {
if (ev[i].flags & EV_EOF) {
if (verbose > -1)
logwarnx("proxy %s ipc socket "
"eof",
sockmap->ifn->ifname);
if (close(sockmap->s) == -1) {
logwarn("proxy %s close"
"ipc socket error",
sockmap->ifn->ifname);
exit(1);
}
break;
}
handleifnmsg(sockmap);
break;
}
}
}
}
/*
* Receive configuration from the master.
*
* SINIT
* SIFN
* SCIDRADDR
*
* Exit on error.
*/
static void
recvconfig(int masterport)
{
static union {
struct sinit init;
struct sifn ifn;
struct speer peer;
struct scidraddr cidraddr;
struct seos eos;
} smsg;
size_t n, m, msgsize;
unsigned char mtcode;
struct ifn *ifn;
union sockaddr_inet *listenaddr;
struct peer *peer;
struct sessmap *sessmap;
msgsize = sizeof(smsg);
if (wire_recvmsg(masterport, &mtcode, &smsg, &msgsize) == -1) {
logwarnx("proxy receive SINIT error %d", masterport);
exit(1);
}
if (mtcode != SINIT) {
logwarnx("proxy SINIT %d != %d", SINIT, mtcode);
exit(1);
}
background = smsg.init.background;
verbose = smsg.init.verbose;
uid = smsg.init.uid;
gid = smsg.init.gid;
eport = smsg.init.enclport;
ifnvsize = smsg.init.nifns;
if ((ifnv = calloc(ifnvsize, sizeof(*ifnv))) == NULL) {
logwarn("proxy calloc ifnv error");
exit(1);
}
for (n = 0; n < ifnvsize; n++) {
msgsize = sizeof(smsg);
if (wire_recvmsg(masterport, &mtcode, &smsg, &msgsize) == -1) {
logwarnx("proxy receive SIFN error");
exit(1);
}
if (mtcode != SIFN) {
logwarnx("proxy SIFN %d != %d", SIFN, mtcode);
exit(1);
}
if ((ifn = malloc(sizeof(**ifnv))) == NULL) {
logwarn("proxy malloc ifnv[%zu] error", n);
exit(1);
}
assert(smsg.ifn.ifnid == n);
ifn->id = smsg.ifn.ifnid;
ifn->ifname = strdup(smsg.ifn.ifname);
ifn->port = smsg.ifn.ifnport;
ifn->listenaddrssize = smsg.ifn.laddr6count +
smsg.ifn.laddr4count;
memcpy(ifn->mac1key, smsg.ifn.mac1key,
MIN(sizeof ifn->mac1key, sizeof smsg.ifn.mac1key));
memcpy(ifn->cookiekey, smsg.ifn.cookiekey,
MIN(sizeof ifn->cookiekey, sizeof smsg.ifn.cookiekey));
ifn->peerssize = smsg.ifn.npeers;
if ((ifn->peers = calloc(ifn->peerssize, sizeof(*ifn->peers)))
== NULL) {
logwarn("proxy calloc ifnv->peers error");
exit(1);
}
for (m = 0; m < ifn->peerssize; m++) {
peer = malloc(sizeof(*ifn->peers[m]));
if (peer == NULL) {
logwarn("proxy malloc peer error");
exit(1);
}
peer->id = m;
peer->sesstent = -1;
peer->sessnext = -1;
peer->sesscurr = -1;
peer->sessprev = -1;
ifn->peers[m] = peer;
}
if (MAXPEERS / 4 < ifn->peerssize) {
logwarnx("proxy only %d peers are supported",
MAXPEERS);
exit(1);
}
ifn->sessmapvsize = ifn->peerssize * 4;
if ((ifn->sessmapv = calloc(ifn->sessmapvsize,
sizeof(*ifn->sessmapv))) == NULL) {
logwarn("proxy calloc ifn->sessmapv error");
exit(1);
}
for (m = 0; m < ifn->sessmapvsize; m++) {
sessmap = malloc(sizeof(*ifn->sessmapv[m]));
if (sessmap == NULL) {
logwarn("proxy malloc sessmap error");
exit(1);
}
sessmap->sessid = -1;
sessmap->peer = NULL;
ifn->sessmapv[m] = sessmap;
}
/* receive all server addresses */
if ((ifn->listenaddrs = calloc(ifn->listenaddrssize,
sizeof(*ifn->listenaddrs))) == NULL) {
logwarn("proxy calloc ifn->listenaddrs error");
exit(1);
}
for (m = 0; m < ifn->listenaddrssize; m++) {
msgsize = sizeof(smsg);
if (wire_recvmsg(masterport, &mtcode, &smsg, &msgsize)
== -1) {
logwarnx("proxy receive SCIDRADDR error");
exit(1);
}
if (mtcode != SCIDRADDR) {
logwarnx("proxy SCIDRADDR %d != %d",
SCIDRADDR, mtcode);
exit(1);
}
assert(smsg.cidraddr.ifnid == ifn->id);
if (smsg.cidraddr.addr.h.family != AF_INET6 &&
smsg.cidraddr.addr.h.family != AF_INET) {
logwarnx("proxy unsupported address family: %d",
smsg.cidraddr.addr.h.family);
continue;
}
if ((listenaddr = malloc(sizeof(*listenaddr))) == NULL) {
logwarn("proxy malloc listenaddr error");
exit(1);
}
memcpy(listenaddr, &smsg.cidraddr.addr,
MIN(sizeof *listenaddr, sizeof smsg.cidraddr.addr));
ifn->listenaddrs[m] = listenaddr;
}
ifnv[n] = ifn;
}
/* expect end of startup signal */
msgsize = sizeof(smsg);
if (wire_recvmsg(masterport, &mtcode, &smsg, &msgsize) == -1) {
logwarnx("proxy receive SEOS error");
exit(1);
}
if (mtcode != SEOS) {
logwarnx("proxy SEOS %d != %d", SEOS, mtcode);
exit(1);
}
explicit_bzero(&smsg, sizeof(smsg));
if (verbose > 2)
logdebugx("proxy config received from master");
}
/*
* "masterport" descriptor to communicate with the master process and receive
* the configuration.
*/
void
proxy_init(int masterport)
{
char addrstr[MAXADDRSTR];
union sockaddr_inet *listenaddr;
struct sigaction sa;
size_t heapneeded, i, m, n, nrlistenaddrs, nrpeers, nrsessmaps;
const int on = 1;
int stdopen, s;
socklen_t len;
uint32_t ifnid;
struct ifn *ifn;
recvconfig(masterport);
/*
* Make sure we are not missing any communication channels and that
* there is no descriptor leak.
*/
stdopen = isopenfd(STDIN_FILENO) + isopenfd(STDOUT_FILENO) +
isopenfd(STDERR_FILENO);
if (!isopenfd(masterport)) {
logwarnx("proxy masterport not open %d", masterport);
exit(1);
}
if (!isopenfd(eport)) {
logwarnx("proxy enclave port not open %d", eport);
exit(1);
}
for (n = 0; n < ifnvsize; n++) {
ifn = ifnv[n];
if (!isopenfd(ifn->port)) {
logwarnx("proxy %s port %d not open", ifn->ifname,
ifn->port);
exit(1);
}
}
if ((size_t)getdtablecount() != stdopen + 2 + ifnvsize) {
logwarnx("proxy descriptor mismatch: %d != %zu",
getdtablecount(), stdopen + 2 + ifnvsize);
exit(1);
}
/*
* Initialize IPC and UDP sockets in one sorted array so that we can
* easily monitor events. Start server sockets but don't process input
* before dropping privileges.
*/
sockmapv = NULL;
sockmapvsize = 0;
i = 0;
for (n = 0; n < ifnvsize; n++) {
ifn = ifnv[n];
/* one IPC socket plus one for all listen addressses */
sockmapvsize += 1 + ifn->listenaddrssize;
sockmapv = reallocarray(sockmapv, sockmapvsize,
sizeof(*sockmapv));
if (sockmapv == NULL) {
logwarn("proxy reallocarray sockmapv error");
exit(1);
}
sockmapv[i] = malloc(sizeof(*sockmapv[i]));
if (sockmapv[i] == NULL) {
logwarn("proxy malloc sockmapv[i] error");
exit(1);
}
sockmapv[i]->s = ifn->port;
sockmapv[i]->ifn = ifn;
sockmapv[i]->listenaddr = NULL;
/*
* Before creating server sockets, wait for each ifn process to
* send the signal that it has created its sockets.
*/
if (read(ifn->port, &ifnid, sizeof ifnid) == -1) {
logwarn("proxy %s read error port %d",
ifn->ifname, ifn->port);
exit(1);
}
if (ifnid != ifn->id) {
logwarnx("proxy %s received ifn id %u, expected "
"%u", ifn->ifname, ifnid, ifn->id);