static int recv_challenge_ack(int fd,
unsigned our_challenge,
char cookie[], unsigned ms)
{
char dbuf[DEFBUF_SIZ];
char *buf = dbuf;
int is_static = 1;
int buflen = DEFBUF_SIZ;
int rlen;
char *s;
char tag;
char her_digest[16], expected_digest[16];
erl_errno = EIO; /* Default */
if ((rlen = read_2byte_package(fd, &buf, &buflen, &is_static, ms)) != 17) {
EI_TRACE_ERR1("recv_challenge_ack",
"<- RECV_CHALLENGE_ACK socket read failed (%d)",rlen);
goto error;
}
s = buf;
if ((tag = get8(s)) != 'a') {
EI_TRACE_ERR2("recv_challenge_ack",
"<- RECV_CHALLENGE_ACK incorrect tag, "
"expected 'a' got '%c' (%u)",tag,tag);
goto error;
}
memcpy(her_digest, s, 16);
gen_digest(our_challenge, cookie, (unsigned char *)expected_digest);
if (memcmp(her_digest, expected_digest, 16)) {
EI_TRACE_ERR0("recv_challenge_ack",
"<- RECV_CHALLENGE_ACK authorization failure");
goto error;
}
if (!is_static)
free(buf);
if (ei_tracelevel >= 3) {
char buffer[33];
EI_TRACE_CONN1("recv_challenge_ack",
"<- RECV_CHALLENGE_ACK (ok) digest = %s",hex(her_digest,buffer));
}
erl_errno = 0;
return 0;
error:
if (!is_static)
free(buf);
return -1;
}
static int recv_name(int fd,
unsigned *version,
unsigned *flags, ErlConnect *namebuf, unsigned ms)
{
char dbuf[DEFBUF_SIZ];
char *buf = dbuf;
int is_static = 1;
int buflen = DEFBUF_SIZ;
int rlen;
char *s;
struct sockaddr_in sin;
socklen_t sin_len = sizeof(sin);
char tag;
erl_errno = EIO; /* Default */
if ((rlen = read_2byte_package(fd, &buf, &buflen, &is_static, ms)) <= 0) {
EI_TRACE_ERR1("recv_name","<- RECV_NAME socket read failed (%d)",rlen);
goto error;
}
if ((rlen - 7) > MAXNODELEN) {
EI_TRACE_ERR1("recv_name","<- RECV_NAME nodename too long (%d)",rlen-7);
goto error;
}
s = buf;
tag = get8(s);
if (tag != 'n') {
EI_TRACE_ERR2("recv_name","<- RECV_NAME incorrect tag, "
"expected 'n' got '%c' (%u)",tag,tag);
goto error;
}
*version = get16be(s);
*flags = get32be(s);
if (!(*flags & DFLAG_EXTENDED_REFERENCES)) {
EI_TRACE_ERR0("recv_name","<- RECV_NAME peer cannot handle"
"extended references");
goto error;
}
if (!(*flags & DFLAG_EXTENDED_PIDS_PORTS)
&& !ei_internal_use_r9_pids_ports()) {
EI_TRACE_ERR0("recv_name","<- RECV_NAME peer cannot "
"handle extended pids and ports");
erl_errno = EIO;
goto error;
}
if (getpeername(fd, (struct sockaddr *) &sin, &sin_len) < 0) {
EI_TRACE_ERR0("recv_name","<- RECV_NAME can't get peername");
erl_errno = errno;
goto error;
}
memcpy(namebuf->ipadr, &(sin.sin_addr.s_addr),
sizeof(sin.sin_addr.s_addr));
memcpy(namebuf->nodename, s, rlen - 7);
namebuf->nodename[rlen - 7] = '\0';
if (!is_static)
free(buf);
EI_TRACE_CONN3("recv_name",
"<- RECV_NAME (ok) node = %s, version = %u, flags = %u",
namebuf->nodename,*version,*flags);
erl_errno = 0;
return 0;
error:
if (!is_static)
free(buf);
return -1;
}
