/src/freeradius-server/src/protocols/radius/tcp.c
Line | Count | Source |
1 | | /* |
2 | | * This program is free software; you can redistribute it and/or modify |
3 | | * it under the terms of the GNU General Public License as published by |
4 | | * the Free Software Foundation; either version 2 of the License, or |
5 | | * (at your option) any later version. |
6 | | * |
7 | | * This program is distributed in the hope that it will be useful, |
8 | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
9 | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
10 | | * GNU General Public License for more details. |
11 | | * |
12 | | * You should have received a copy of the GNU General Public License |
13 | | * along with this program; if not, write to the Free Software |
14 | | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA |
15 | | */ |
16 | | |
17 | | /** |
18 | | * $Id: 76cf928bebfbd1ed16ca2dd648c4df95228b7573 $ |
19 | | * |
20 | | * @file protocols/radius/packet.c |
21 | | * @brief TCP-specific functions. |
22 | | * |
23 | | * @copyright (C) 2009 Dante http://dante.net |
24 | | */ |
25 | | RCSID("$Id: 76cf928bebfbd1ed16ca2dd648c4df95228b7573 $") |
26 | | |
27 | | #include <freeradius-devel/radius/radius.h> |
28 | | #include <freeradius-devel/util/syserror.h> |
29 | | #include "tcp.h" |
30 | | |
31 | | /* |
32 | | * This ASSUMES that the socket is marked as O_NONBLOCK, which |
33 | | * the function above does set, if your system supports it. |
34 | | */ |
35 | | ssize_t fr_tcp_read_packet(int sockfd, uint8_t *buffer, size_t size, size_t *total, uint32_t max_attributes, bool require_message_authenticator) |
36 | 0 | { |
37 | 0 | ssize_t slen; |
38 | 0 | size_t packet_len, hdr_len; |
39 | 0 | uint8_t *start, *end; |
40 | |
|
41 | 0 | fr_assert(*total < size); |
42 | 0 | start = buffer + *total; |
43 | 0 | end = buffer + size; |
44 | |
|
45 | 0 | slen = recv(sockfd, start, (size_t) (end - start), 0); |
46 | 0 | if (slen <= 0) return -1; /* 0 means EOF for non-blocking TCP reads */ |
47 | | |
48 | 0 | packet_len = *total + slen; |
49 | | |
50 | | /* |
51 | | * Not enough for a header, we don't have a packet. |
52 | | */ |
53 | 0 | if (packet_len < 4) { |
54 | 0 | *total = packet_len; |
55 | 0 | return 0; |
56 | 0 | } |
57 | | |
58 | 0 | hdr_len = fr_nbo_to_uint16(buffer + 2); |
59 | 0 | if ((hdr_len < RADIUS_HEADER_LENGTH) || (hdr_len > RADIUS_MAX_PACKET_SIZE)) return -1; |
60 | | |
61 | 0 | if (packet_len < hdr_len) { |
62 | 0 | *total = packet_len; |
63 | 0 | return 0; |
64 | 0 | } |
65 | | |
66 | | /* |
67 | | * See if it's a well-formed RADIUS packet. |
68 | | */ |
69 | 0 | if (!fr_radius_ok(buffer, &hdr_len, max_attributes, require_message_authenticator, NULL)) { |
70 | 0 | return -1; |
71 | 0 | } |
72 | | |
73 | 0 | *total = hdr_len; |
74 | 0 | return hdr_len; |
75 | 0 | } |