diff options
Diffstat (limited to 'kdc/connect.c')
| -rw-r--r-- | kdc/connect.c | 900 |
1 files changed, 900 insertions, 0 deletions
diff --git a/kdc/connect.c b/kdc/connect.c new file mode 100644 index 0000000..c2df088 --- /dev/null +++ b/kdc/connect.c @@ -0,0 +1,900 @@ +/* + * 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); +} |
