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-rw-r--r--crypto/heimdal/kdc/connect.c900
1 files changed, 0 insertions, 900 deletions
diff --git a/crypto/heimdal/kdc/connect.c b/crypto/heimdal/kdc/connect.c
deleted file mode 100644
index c2df088..0000000
--- a/crypto/heimdal/kdc/connect.c
+++ /dev/null
@@ -1,900 +0,0 @@
-/*
- * Copyright (c) 1997-2005 Kungliga Tekniska Högskolan
- * (Royal Institute of Technology, Stockholm, Sweden).
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither the name of the Institute nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include "kdc_locl.h"
-
-RCSID("$Id: connect.c 22434 2008-01-14 09:21:37Z lha $");
-
-/* Should we enable the HTTP hack? */
-int enable_http = -1;
-
-/* Log over requests to the KDC */
-const char *request_log;
-
-/* A string describing on what ports to listen */
-const char *port_str;
-
-krb5_addresses explicit_addresses;
-
-size_t max_request; /* maximal size of a request */
-
-/*
- * a tuple describing on what to listen
- */
-
-struct port_desc{
- int family;
- int type;
- int port;
-};
-
-/* the current ones */
-
-static struct port_desc *ports;
-static int num_ports;
-
-/*
- * add `family, port, protocol' to the list with duplicate suppresion.
- */
-
-static void
-add_port(krb5_context context,
- int family, int port, const char *protocol)
-{
- int type;
- int i;
-
- if(strcmp(protocol, "udp") == 0)
- type = SOCK_DGRAM;
- else if(strcmp(protocol, "tcp") == 0)
- type = SOCK_STREAM;
- else
- return;
- for(i = 0; i < num_ports; i++){
- if(ports[i].type == type
- && ports[i].port == port
- && ports[i].family == family)
- return;
- }
- ports = realloc(ports, (num_ports + 1) * sizeof(*ports));
- if (ports == NULL)
- krb5_err (context, 1, errno, "realloc");
- ports[num_ports].family = family;
- ports[num_ports].type = type;
- ports[num_ports].port = port;
- num_ports++;
-}
-
-/*
- * add a triple but with service -> port lookup
- * (this prints warnings for stuff that does not exist)
- */
-
-static void
-add_port_service(krb5_context context,
- int family, const char *service, int port,
- const char *protocol)
-{
- port = krb5_getportbyname (context, service, protocol, port);
- add_port (context, family, port, protocol);
-}
-
-/*
- * add the port with service -> port lookup or string -> number
- * (no warning is printed)
- */
-
-static void
-add_port_string (krb5_context context,
- int family, const char *str, const char *protocol)
-{
- struct servent *sp;
- int port;
-
- sp = roken_getservbyname (str, protocol);
- if (sp != NULL) {
- port = sp->s_port;
- } else {
- char *end;
-
- port = htons(strtol(str, &end, 0));
- if (end == str)
- return;
- }
- add_port (context, family, port, protocol);
-}
-
-/*
- * add the standard collection of ports for `family'
- */
-
-static void
-add_standard_ports (krb5_context context,
- krb5_kdc_configuration *config,
- int family)
-{
- add_port_service(context, family, "kerberos", 88, "udp");
- add_port_service(context, family, "kerberos", 88, "tcp");
- add_port_service(context, family, "kerberos-sec", 88, "udp");
- add_port_service(context, family, "kerberos-sec", 88, "tcp");
- if(enable_http)
- add_port_service(context, family, "http", 80, "tcp");
- if(config->enable_524) {
- add_port_service(context, family, "krb524", 4444, "udp");
- add_port_service(context, family, "krb524", 4444, "tcp");
- }
- if(config->enable_v4) {
- add_port_service(context, family, "kerberos-iv", 750, "udp");
- add_port_service(context, family, "kerberos-iv", 750, "tcp");
- }
- if (config->enable_kaserver)
- add_port_service(context, family, "afs3-kaserver", 7004, "udp");
- if(config->enable_kx509) {
- add_port_service(context, family, "kca_service", 9878, "udp");
- add_port_service(context, family, "kca_service", 9878, "tcp");
- }
-
-}
-
-/*
- * parse the set of space-delimited ports in `str' and add them.
- * "+" => all the standard ones
- * otherwise it's port|service[/protocol]
- */
-
-static void
-parse_ports(krb5_context context,
- krb5_kdc_configuration *config,
- const char *str)
-{
- char *pos = NULL;
- char *p;
- char *str_copy = strdup (str);
-
- p = strtok_r(str_copy, " \t", &pos);
- while(p != NULL) {
- if(strcmp(p, "+") == 0) {
-#ifdef HAVE_IPV6
- add_standard_ports(context, config, AF_INET6);
-#endif
- add_standard_ports(context, config, AF_INET);
- } else {
- char *q = strchr(p, '/');
- if(q){
- *q++ = 0;
-#ifdef HAVE_IPV6
- add_port_string(context, AF_INET6, p, q);
-#endif
- add_port_string(context, AF_INET, p, q);
- }else {
-#ifdef HAVE_IPV6
- add_port_string(context, AF_INET6, p, "udp");
- add_port_string(context, AF_INET6, p, "tcp");
-#endif
- add_port_string(context, AF_INET, p, "udp");
- add_port_string(context, AF_INET, p, "tcp");
- }
- }
-
- p = strtok_r(NULL, " \t", &pos);
- }
- free (str_copy);
-}
-
-/*
- * every socket we listen on
- */
-
-struct descr {
- int s;
- int type;
- int port;
- unsigned char *buf;
- size_t size;
- size_t len;
- time_t timeout;
- struct sockaddr_storage __ss;
- struct sockaddr *sa;
- socklen_t sock_len;
- char addr_string[128];
-};
-
-static void
-init_descr(struct descr *d)
-{
- memset(d, 0, sizeof(*d));
- d->sa = (struct sockaddr *)&d->__ss;
- d->s = -1;
-}
-
-/*
- * re-initialize all `n' ->sa in `d'.
- */
-
-static void
-reinit_descrs (struct descr *d, int n)
-{
- int i;
-
- for (i = 0; i < n; ++i)
- d[i].sa = (struct sockaddr *)&d[i].__ss;
-}
-
-/*
- * Create the socket (family, type, port) in `d'
- */
-
-static void
-init_socket(krb5_context context,
- krb5_kdc_configuration *config,
- struct descr *d, krb5_address *a, int family, int type, int port)
-{
- krb5_error_code ret;
- struct sockaddr_storage __ss;
- struct sockaddr *sa = (struct sockaddr *)&__ss;
- krb5_socklen_t sa_size = sizeof(__ss);
-
- init_descr (d);
-
- ret = krb5_addr2sockaddr (context, a, sa, &sa_size, port);
- if (ret) {
- krb5_warn(context, ret, "krb5_addr2sockaddr");
- close(d->s);
- d->s = -1;
- return;
- }
-
- if (sa->sa_family != family)
- return;
-
- d->s = socket(family, type, 0);
- if(d->s < 0){
- krb5_warn(context, errno, "socket(%d, %d, 0)", family, type);
- d->s = -1;
- return;
- }
-#if defined(HAVE_SETSOCKOPT) && defined(SOL_SOCKET) && defined(SO_REUSEADDR)
- {
- int one = 1;
- setsockopt(d->s, SOL_SOCKET, SO_REUSEADDR, (void *)&one, sizeof(one));
- }
-#endif
- d->type = type;
- d->port = port;
-
- if(bind(d->s, sa, sa_size) < 0){
- char a_str[256];
- size_t len;
-
- krb5_print_address (a, a_str, sizeof(a_str), &len);
- krb5_warn(context, errno, "bind %s/%d", a_str, ntohs(port));
- close(d->s);
- d->s = -1;
- return;
- }
- if(type == SOCK_STREAM && listen(d->s, SOMAXCONN) < 0){
- char a_str[256];
- size_t len;
-
- krb5_print_address (a, a_str, sizeof(a_str), &len);
- krb5_warn(context, errno, "listen %s/%d", a_str, ntohs(port));
- close(d->s);
- d->s = -1;
- return;
- }
-}
-
-/*
- * Allocate descriptors for all the sockets that we should listen on
- * and return the number of them.
- */
-
-static int
-init_sockets(krb5_context context,
- krb5_kdc_configuration *config,
- struct descr **desc)
-{
- krb5_error_code ret;
- int i, j;
- struct descr *d;
- int num = 0;
- krb5_addresses addresses;
-
- if (explicit_addresses.len) {
- addresses = explicit_addresses;
- } else {
- ret = krb5_get_all_server_addrs (context, &addresses);
- if (ret)
- krb5_err (context, 1, ret, "krb5_get_all_server_addrs");
- }
- parse_ports(context, config, port_str);
- d = malloc(addresses.len * num_ports * sizeof(*d));
- if (d == NULL)
- krb5_errx(context, 1, "malloc(%lu) failed",
- (unsigned long)num_ports * sizeof(*d));
-
- for (i = 0; i < num_ports; i++){
- for (j = 0; j < addresses.len; ++j) {
- init_socket(context, config, &d[num], &addresses.val[j],
- ports[i].family, ports[i].type, ports[i].port);
- if(d[num].s != -1){
- char a_str[80];
- size_t len;
-
- krb5_print_address (&addresses.val[j], a_str,
- sizeof(a_str), &len);
-
- kdc_log(context, config, 5, "listening on %s port %u/%s",
- a_str,
- ntohs(ports[i].port),
- (ports[i].type == SOCK_STREAM) ? "tcp" : "udp");
- /* XXX */
- num++;
- }
- }
- }
- krb5_free_addresses (context, &addresses);
- d = realloc(d, num * sizeof(*d));
- if (d == NULL && num != 0)
- krb5_errx(context, 1, "realloc(%lu) failed",
- (unsigned long)num * sizeof(*d));
- reinit_descrs (d, num);
- *desc = d;
- return num;
-}
-
-/*
- *
- */
-
-static const char *
-descr_type(struct descr *d)
-{
- if (d->type == SOCK_DGRAM)
- return "udp";
- else if (d->type == SOCK_STREAM)
- return "tcp";
- return "unknown";
-}
-
-static void
-addr_to_string(krb5_context context,
- struct sockaddr *addr, size_t addr_len, char *str, size_t len)
-{
- krb5_address a;
- if(krb5_sockaddr2address(context, addr, &a) == 0) {
- if(krb5_print_address(&a, str, len, &len) == 0) {
- krb5_free_address(context, &a);
- return;
- }
- krb5_free_address(context, &a);
- }
- snprintf(str, len, "<family=%d>", addr->sa_family);
-}
-
-/*
- *
- */
-
-static void
-send_reply(krb5_context context,
- krb5_kdc_configuration *config,
- krb5_boolean prependlength,
- struct descr *d,
- krb5_data *reply)
-{
- kdc_log(context, config, 5,
- "sending %lu bytes to %s", (unsigned long)reply->length,
- d->addr_string);
- if(prependlength){
- unsigned char l[4];
- l[0] = (reply->length >> 24) & 0xff;
- l[1] = (reply->length >> 16) & 0xff;
- l[2] = (reply->length >> 8) & 0xff;
- l[3] = reply->length & 0xff;
- if(sendto(d->s, l, sizeof(l), 0, d->sa, d->sock_len) < 0) {
- kdc_log (context, config,
- 0, "sendto(%s): %s", d->addr_string, strerror(errno));
- return;
- }
- }
- if(sendto(d->s, reply->data, reply->length, 0, d->sa, d->sock_len) < 0) {
- kdc_log (context, config,
- 0, "sendto(%s): %s", d->addr_string, strerror(errno));
- return;
- }
-}
-
-/*
- * Handle the request in `buf, len' to socket `d'
- */
-
-static void
-do_request(krb5_context context,
- krb5_kdc_configuration *config,
- void *buf, size_t len, krb5_boolean prependlength,
- struct descr *d)
-{
- krb5_error_code ret;
- krb5_data reply;
- int datagram_reply = (d->type == SOCK_DGRAM);
-
- krb5_kdc_update_time(NULL);
-
- krb5_data_zero(&reply);
- ret = krb5_kdc_process_request(context, config,
- buf, len, &reply, &prependlength,
- d->addr_string, d->sa,
- datagram_reply);
- if(request_log)
- krb5_kdc_save_request(context, request_log, buf, len, &reply, d->sa);
- if(reply.length){
- send_reply(context, config, prependlength, d, &reply);
- krb5_data_free(&reply);
- }
- if(ret)
- kdc_log(context, config, 0,
- "Failed processing %lu byte request from %s",
- (unsigned long)len, d->addr_string);
-}
-
-/*
- * Handle incoming data to the UDP socket in `d'
- */
-
-static void
-handle_udp(krb5_context context,
- krb5_kdc_configuration *config,
- struct descr *d)
-{
- unsigned char *buf;
- int n;
-
- buf = malloc(max_request);
- if(buf == NULL){
- kdc_log(context, config, 0, "Failed to allocate %lu bytes", (unsigned long)max_request);
- return;
- }
-
- d->sock_len = sizeof(d->__ss);
- n = recvfrom(d->s, buf, max_request, 0, d->sa, &d->sock_len);
- if(n < 0)
- krb5_warn(context, errno, "recvfrom");
- else {
- addr_to_string (context, d->sa, d->sock_len,
- d->addr_string, sizeof(d->addr_string));
- do_request(context, config, buf, n, FALSE, d);
- }
- free (buf);
-}
-
-static void
-clear_descr(struct descr *d)
-{
- if(d->buf)
- memset(d->buf, 0, d->size);
- d->len = 0;
- if(d->s != -1)
- close(d->s);
- d->s = -1;
-}
-
-
-/* remove HTTP %-quoting from buf */
-static int
-de_http(char *buf)
-{
- unsigned char *p, *q;
- for(p = q = (unsigned char *)buf; *p; p++, q++) {
- if(*p == '%' && isxdigit(p[1]) && isxdigit(p[2])) {
- unsigned int x;
- if(sscanf((char *)p + 1, "%2x", &x) != 1)
- return -1;
- *q = x;
- p += 2;
- } else
- *q = *p;
- }
- *q = '\0';
- return 0;
-}
-
-#define TCP_TIMEOUT 4
-
-/*
- * accept a new TCP connection on `d[parent]' and store it in `d[child]'
- */
-
-static void
-add_new_tcp (krb5_context context,
- krb5_kdc_configuration *config,
- struct descr *d, int parent, int child)
-{
- int s;
-
- if (child == -1)
- return;
-
- d[child].sock_len = sizeof(d[child].__ss);
- s = accept(d[parent].s, d[child].sa, &d[child].sock_len);
- if(s < 0) {
- krb5_warn(context, errno, "accept");
- return;
- }
-
- if (s >= FD_SETSIZE) {
- krb5_warnx(context, "socket FD too large");
- close (s);
- return;
- }
-
- d[child].s = s;
- d[child].timeout = time(NULL) + TCP_TIMEOUT;
- d[child].type = SOCK_STREAM;
- addr_to_string (context,
- d[child].sa, d[child].sock_len,
- d[child].addr_string, sizeof(d[child].addr_string));
-}
-
-/*
- * Grow `d' to handle at least `n'.
- * Return != 0 if fails
- */
-
-static int
-grow_descr (krb5_context context,
- krb5_kdc_configuration *config,
- struct descr *d, size_t n)
-{
- if (d->size - d->len < n) {
- unsigned char *tmp;
- size_t grow;
-
- grow = max(1024, d->len + n);
- if (d->size + grow > max_request) {
- kdc_log(context, config, 0, "Request exceeds max request size (%lu bytes).",
- (unsigned long)d->size + grow);
- clear_descr(d);
- return -1;
- }
- tmp = realloc (d->buf, d->size + grow);
- if (tmp == NULL) {
- kdc_log(context, config, 0, "Failed to re-allocate %lu bytes.",
- (unsigned long)d->size + grow);
- clear_descr(d);
- return -1;
- }
- d->size += grow;
- d->buf = tmp;
- }
- return 0;
-}
-
-/*
- * Try to handle the TCP data at `d->buf, d->len'.
- * Return -1 if failed, 0 if succesful, and 1 if data is complete.
- */
-
-static int
-handle_vanilla_tcp (krb5_context context,
- krb5_kdc_configuration *config,
- struct descr *d)
-{
- krb5_storage *sp;
- uint32_t len;
-
- sp = krb5_storage_from_mem(d->buf, d->len);
- if (sp == NULL) {
- kdc_log (context, config, 0, "krb5_storage_from_mem failed");
- return -1;
- }
- krb5_ret_uint32(sp, &len);
- krb5_storage_free(sp);
- if(d->len - 4 >= len) {
- memmove(d->buf, d->buf + 4, d->len - 4);
- d->len -= 4;
- return 1;
- }
- return 0;
-}
-
-/*
- * Try to handle the TCP/HTTP data at `d->buf, d->len'.
- * Return -1 if failed, 0 if succesful, and 1 if data is complete.
- */
-
-static int
-handle_http_tcp (krb5_context context,
- krb5_kdc_configuration *config,
- struct descr *d)
-{
- char *s, *p, *t;
- void *data;
- char *proto;
- int len;
-
- s = (char *)d->buf;
-
- p = strstr(s, "\r\n");
- if (p == NULL) {
- kdc_log(context, config, 0, "Malformed HTTP request from %s", d->addr_string);
- return -1;
- }
- *p = 0;
-
- p = NULL;
- t = strtok_r(s, " \t", &p);
- if (t == NULL) {
- kdc_log(context, config, 0, "Malformed HTTP request from %s", d->addr_string);
- return -1;
- }
- t = strtok_r(NULL, " \t", &p);
- if(t == NULL) {
- kdc_log(context, config, 0, "Malformed HTTP request from %s", d->addr_string);
- return -1;
- }
- data = malloc(strlen(t));
- if (data == NULL) {
- kdc_log(context, config, 0, "Failed to allocate %lu bytes",
- (unsigned long)strlen(t));
- return -1;
- }
- if(*t == '/')
- t++;
- if(de_http(t) != 0) {
- kdc_log(context, config, 0, "Malformed HTTP request from %s", d->addr_string);
- kdc_log(context, config, 5, "HTTP request: %s", t);
- free(data);
- return -1;
- }
- proto = strtok_r(NULL, " \t", &p);
- if (proto == NULL) {
- kdc_log(context, config, 0, "Malformed HTTP request from %s", d->addr_string);
- free(data);
- return -1;
- }
- len = base64_decode(t, data);
- if(len <= 0){
- const char *msg =
- " 404 Not found\r\n"
- "Server: Heimdal/" VERSION "\r\n"
- "Cache-Control: no-cache\r\n"
- "Pragma: no-cache\r\n"
- "Content-type: text/html\r\n"
- "Content-transfer-encoding: 8bit\r\n\r\n"
- "<TITLE>404 Not found</TITLE>\r\n"
- "<H1>404 Not found</H1>\r\n"
- "That page doesn't exist, maybe you are looking for "
- "<A HREF=\"http://www.h5l.org/\">Heimdal</A>?\r\n";
- kdc_log(context, config, 0, "HTTP request from %s is non KDC request", d->addr_string);
- kdc_log(context, config, 5, "HTTP request: %s", t);
- free(data);
- if (write(d->s, proto, strlen(proto)) < 0) {
- kdc_log(context, config, 0, "HTTP write failed: %s: %s",
- d->addr_string, strerror(errno));
- return -1;
- }
- if (write(d->s, msg, strlen(msg)) < 0) {
- kdc_log(context, config, 0, "HTTP write failed: %s: %s",
- d->addr_string, strerror(errno));
- return -1;
- }
- return -1;
- }
- {
- const char *msg =
- " 200 OK\r\n"
- "Server: Heimdal/" VERSION "\r\n"
- "Cache-Control: no-cache\r\n"
- "Pragma: no-cache\r\n"
- "Content-type: application/octet-stream\r\n"
- "Content-transfer-encoding: binary\r\n\r\n";
- if (write(d->s, proto, strlen(proto)) < 0) {
- kdc_log(context, config, 0, "HTTP write failed: %s: %s",
- d->addr_string, strerror(errno));
- return -1;
- }
- if (write(d->s, msg, strlen(msg)) < 0) {
- kdc_log(context, config, 0, "HTTP write failed: %s: %s",
- d->addr_string, strerror(errno));
- return -1;
- }
- }
- memcpy(d->buf, data, len);
- d->len = len;
- free(data);
- return 1;
-}
-
-/*
- * Handle incoming data to the TCP socket in `d[index]'
- */
-
-static void
-handle_tcp(krb5_context context,
- krb5_kdc_configuration *config,
- struct descr *d, int idx, int min_free)
-{
- unsigned char buf[1024];
- int n;
- int ret = 0;
-
- if (d[idx].timeout == 0) {
- add_new_tcp (context, config, d, idx, min_free);
- return;
- }
-
- n = recvfrom(d[idx].s, buf, sizeof(buf), 0, NULL, NULL);
- if(n < 0){
- krb5_warn(context, errno, "recvfrom failed from %s to %s/%d",
- d[idx].addr_string, descr_type(d + idx),
- ntohs(d[idx].port));
- return;
- } else if (n == 0) {
- krb5_warnx(context, "connection closed before end of data after %lu "
- "bytes from %s to %s/%d", (unsigned long)d[idx].len,
- d[idx].addr_string, descr_type(d + idx),
- ntohs(d[idx].port));
- clear_descr (d + idx);
- return;
- }
- if (grow_descr (context, config, &d[idx], n))
- return;
- memcpy(d[idx].buf + d[idx].len, buf, n);
- d[idx].len += n;
- if(d[idx].len > 4 && d[idx].buf[0] == 0) {
- ret = handle_vanilla_tcp (context, config, &d[idx]);
- } else if(enable_http &&
- d[idx].len >= 4 &&
- strncmp((char *)d[idx].buf, "GET ", 4) == 0 &&
- strncmp((char *)d[idx].buf + d[idx].len - 4,
- "\r\n\r\n", 4) == 0) {
- ret = handle_http_tcp (context, config, &d[idx]);
- if (ret < 0)
- clear_descr (d + idx);
- } else if (d[idx].len > 4) {
- kdc_log (context, config,
- 0, "TCP data of strange type from %s to %s/%d",
- d[idx].addr_string, descr_type(d + idx),
- ntohs(d[idx].port));
- if (d[idx].buf[0] & 0x80) {
- krb5_data reply;
-
- kdc_log (context, config, 0, "TCP extension not supported");
-
- ret = krb5_mk_error(context,
- KRB5KRB_ERR_FIELD_TOOLONG,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- &reply);
- if (ret == 0) {
- send_reply(context, config, TRUE, d + idx, &reply);
- krb5_data_free(&reply);
- }
- }
- clear_descr(d + idx);
- return;
- }
- if (ret < 0)
- return;
- else if (ret == 1) {
- do_request(context, config,
- d[idx].buf, d[idx].len, TRUE, &d[idx]);
- clear_descr(d + idx);
- }
-}
-
-void
-loop(krb5_context context,
- krb5_kdc_configuration *config)
-{
- struct descr *d;
- int ndescr;
-
- ndescr = init_sockets(context, config, &d);
- if(ndescr <= 0)
- krb5_errx(context, 1, "No sockets!");
- kdc_log(context, config, 0, "KDC started");
- while(exit_flag == 0){
- struct timeval tmout;
- fd_set fds;
- int min_free = -1;
- int max_fd = 0;
- int i;
-
- FD_ZERO(&fds);
- for(i = 0; i < ndescr; i++) {
- if(d[i].s >= 0){
- if(d[i].type == SOCK_STREAM &&
- d[i].timeout && d[i].timeout < time(NULL)) {
- kdc_log(context, config, 1,
- "TCP-connection from %s expired after %lu bytes",
- d[i].addr_string, (unsigned long)d[i].len);
- clear_descr(&d[i]);
- continue;
- }
- if(max_fd < d[i].s)
- max_fd = d[i].s;
- if (max_fd >= FD_SETSIZE)
- krb5_errx(context, 1, "fd too large");
- FD_SET(d[i].s, &fds);
- } else if(min_free < 0 || i < min_free)
- min_free = i;
- }
- if(min_free == -1){
- struct descr *tmp;
- tmp = realloc(d, (ndescr + 4) * sizeof(*d));
- if(tmp == NULL)
- krb5_warnx(context, "No memory");
- else {
- d = tmp;
- reinit_descrs (d, ndescr);
- memset(d + ndescr, 0, 4 * sizeof(*d));
- for(i = ndescr; i < ndescr + 4; i++)
- init_descr (&d[i]);
- min_free = ndescr;
- ndescr += 4;
- }
- }
-
- tmout.tv_sec = TCP_TIMEOUT;
- tmout.tv_usec = 0;
- switch(select(max_fd + 1, &fds, 0, 0, &tmout)){
- case 0:
- break;
- case -1:
- if (errno != EINTR)
- krb5_warn(context, errno, "select");
- break;
- default:
- for(i = 0; i < ndescr; i++)
- if(d[i].s >= 0 && FD_ISSET(d[i].s, &fds)) {
- if(d[i].type == SOCK_DGRAM)
- handle_udp(context, config, &d[i]);
- else if(d[i].type == SOCK_STREAM)
- handle_tcp(context, config, d, i, min_free);
- }
- }
- }
- if(exit_flag == SIGXCPU)
- kdc_log(context, config, 0, "CPU time limit exceeded");
- else if(exit_flag == SIGINT || exit_flag == SIGTERM)
- kdc_log(context, config, 0, "Terminated");
- else
- kdc_log(context, config, 0, "Unexpected exit reason: %d", exit_flag);
- free (d);
-}
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