diff options
Diffstat (limited to 'lib/radius/id.c')
| -rw-r--r-- | lib/radius/id.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/lib/radius/id.c b/lib/radius/id.c new file mode 100644 index 0000000..4ccd032 --- /dev/null +++ b/lib/radius/id.c @@ -0,0 +1,181 @@ +/* +Copyright (c) 2011, Network RADIUS SARL +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * 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. + * Neither the name of the <organization> 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 COPYRIGHT HOLDERS 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 <COPYRIGHT HOLDER> 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 "client.h" + +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif + +/** \file id.c + * \brief Handling of ID allocation / freeing + * + */ + +static int find_id(nr_server_t *s) +{ + int i; + uint32_t lvalue; + + if ((s->used < 0) || (s->used > 256)) return -RSE_INTERNAL; + + /* + * Ensure that the ID allocation is random. + */ + lvalue = nr_rand(); + + for (i = 0; i < 256; i++) { + int offset = (i + lvalue) & 0xff; + + if (!s->ids[offset]) return offset; + } + + nr_strerror_printf("Out of IDs for server"); + return -1; +} + +int nr_server_id_alloc(nr_server_t *s, RADIUS_PACKET *packet) +{ + int new_id; + + if (!s || !packet) return -RSE_INVAL; + + new_id = find_id(s); + if (new_id < 0) return -new_id; + + s->ids[new_id] = packet; + s->used++; + packet->sockfd = s->sockfd; + packet->code = s->code; + packet->src = s->src; + packet->dst = s->dst; + packet->id = new_id; + + return 0; +} + +int nr_server_id_free(nr_server_t *s, RADIUS_PACKET *packet) +{ + if (!s || !packet) return -RSE_INVAL; + + if ((packet->id < 0) || (packet->id > 255) || !s->ids[packet->id]) { + return -RSE_INVAL; + } + + if (s->ids[packet->id] != packet) return -RSE_INTERNAL; + + s->ids[packet->id] = NULL; + s->used--; + packet->sockfd = -1; + + return 0; +} + +int nr_server_id_realloc(nr_server_t *s, RADIUS_PACKET *packet) +{ + int new_id; + + if (!s || !packet) return -RSE_INVAL; + + if ((packet->id < 0) || (packet->id > 255) || !s->ids[packet->id]) { + return -RSE_INVAL; + } + + if (s->ids[packet->id] != packet) return -RSE_INTERNAL; + + new_id = find_id(s); + if (new_id < 0) return new_id; + + s->ids[packet->id] = NULL; + packet->id = new_id; + s->ids[packet->id] = packet; + + return 0; +} + + +int nr_server_init(nr_server_t *s, int code, const char *secret) +{ + if (!s || !secret || !*secret || + (code == 0) || (code > RS_MAX_PACKET_CODE)) { + return -RSE_INVAL; + } + + memset(s, 0, sizeof(*s)); + + s->sockfd = -1; + s->code = code; + s->secret = secret; + s->sizeof_secret = strlen(secret); + s->src.ss_family = AF_UNSPEC; + s->dst.ss_family = AF_UNSPEC; + + return 0; +} + + +int nr_server_close(const nr_server_t *s) +{ + if (!s) return -RSE_INVAL; + + if (s->used > 0) return -RSE_INUSE; + + if (s->sockfd >= 0) evutil_closesocket(s->sockfd); + + return 0; +} + +int nr_server_packet_alloc(const nr_server_t *s, RADIUS_PACKET **packet_p) +{ + int rcode; + RADIUS_PACKET *packet; + + if (!packet_p) return -RSE_INVAL; + + packet = malloc(sizeof(*packet) + RS_MAX_PACKET_LEN); + if (!packet) return -RSE_NOMEM; + + memset(packet, 0, sizeof(*packet)); + + if (!s) { + packet->data = (uint8_t *)(packet + 1); + packet->sizeof_data = RS_MAX_PACKET_LEN; + + *packet_p = packet; + return 0; + } + + rcode = nr_packet_init(packet, NULL, s->secret, s->code, + (uint8_t *)(packet + 1), RS_MAX_PACKET_LEN); + if (rcode < 0) { + free(packet); + return rcode; + } + + *packet_p = packet; + return 0; +} |