1 /* dscp lookup routines lifted wholesale from openssh */
2
3 /*
4 * Copyright (c) 2000 Markus Friedl. All rights reserved.
5 * Copyright (c) 2005,2006 Damien Miller. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <stdio.h>
29 #include <string.h>
30 #include <stdlib.h>
31 #include <inttypes.h>
32
33 #ifdef WIN32
34 #define strcasecmp(a,b) _stricmp(a,b)
35 #define snprintf _snprintf
36 #endif
37
38 int parse_qos(const char *cp);
39 const char * iptos2str(int iptos);
40
41 /*
42 * Definitions for IP type of service (ip_tos)
43 */
44
45 #if HAVE_NETINET_IN_SYSTM_H
46 #include <netinet/in_systm.h>
47 #endif
48 #if HAVE_NETINET_IP_H
49 #include <netinet/ip.h>
50 #endif
51
52 #ifndef IPTOS_LOWDELAY
53 # define IPTOS_LOWDELAY 0x10
54 # define IPTOS_THROUGHPUT 0x08
55 # define IPTOS_RELIABILITY 0x04
56 # define IPTOS_LOWCOST 0x02
57 # define IPTOS_MINCOST IPTOS_LOWCOST
58 #endif /* IPTOS_LOWDELAY */
59
60 /*
61 * Definitions for DiffServ Codepoints as per RFC2474
62 */
63 #ifndef IPTOS_DSCP_AF11
64 # define IPTOS_DSCP_AF11 0x28
65 # define IPTOS_DSCP_AF12 0x30
66 # define IPTOS_DSCP_AF13 0x38
67 # define IPTOS_DSCP_AF21 0x48
68 # define IPTOS_DSCP_AF22 0x50
69 # define IPTOS_DSCP_AF23 0x58
70 # define IPTOS_DSCP_AF31 0x68
71 # define IPTOS_DSCP_AF32 0x70
72 # define IPTOS_DSCP_AF33 0x78
73 # define IPTOS_DSCP_AF41 0x88
74 # define IPTOS_DSCP_AF42 0x90
75 # define IPTOS_DSCP_AF43 0x98
76 # define IPTOS_DSCP_EF 0xb8
77 #endif /* IPTOS_DSCP_AF11 */
78
79 #ifndef IPTOS_DSCP_CS0
80 # define IPTOS_DSCP_CS0 0x00
81 # define IPTOS_DSCP_CS1 0x20
82 # define IPTOS_DSCP_CS2 0x40
83 # define IPTOS_DSCP_CS3 0x60
84 # define IPTOS_DSCP_CS4 0x80
85 # define IPTOS_DSCP_CS5 0xa0
86 # define IPTOS_DSCP_CS6 0xc0
87 # define IPTOS_DSCP_CS7 0xe0
88 #endif /* IPTOS_DSCP_CS0 */
89 #ifndef IPTOS_DSCP_EF
90 # define IPTOS_DSCP_EF 0xb8
91 #endif /* IPTOS_DSCP_EF */
92
93 static const struct {
94 const char *name;
95 int value;
96 } ipqos[] = {
97 { "af11", IPTOS_DSCP_AF11 },
98 { "af12", IPTOS_DSCP_AF12 },
99 { "af13", IPTOS_DSCP_AF13 },
100 { "af21", IPTOS_DSCP_AF21 },
101 { "af22", IPTOS_DSCP_AF22 },
102 { "af23", IPTOS_DSCP_AF23 },
103 { "af31", IPTOS_DSCP_AF31 },
104 { "af32", IPTOS_DSCP_AF32 },
105 { "af33", IPTOS_DSCP_AF33 },
106 { "af41", IPTOS_DSCP_AF41 },
107 { "af42", IPTOS_DSCP_AF42 },
108 { "af43", IPTOS_DSCP_AF43 },
109 { "cs0", IPTOS_DSCP_CS0 },
110 { "cs1", IPTOS_DSCP_CS1 },
111 { "cs2", IPTOS_DSCP_CS2 },
112 { "cs3", IPTOS_DSCP_CS3 },
113 { "cs4", IPTOS_DSCP_CS4 },
114 { "cs5", IPTOS_DSCP_CS5 },
115 { "cs6", IPTOS_DSCP_CS6 },
116 { "cs7", IPTOS_DSCP_CS7 },
117 { "ef", IPTOS_DSCP_EF },
118 { "lowdelay", IPTOS_LOWDELAY },
119 { "throughput", IPTOS_THROUGHPUT },
120 { "reliability", IPTOS_RELIABILITY },
121 { NULL, -1 }
122 };
123
124 int
parse_qos(const char * cp)125 parse_qos(const char *cp)
126 {
127 unsigned int i;
128 char *ep = NULL;
129 long val;
130
131 if (cp == NULL)
132 return -1;
133 for (i = 0; ipqos[i].name != NULL; i++) {
134 if (strcasecmp(cp, ipqos[i].name) == 0)
135 return ipqos[i].value;
136 }
137 /* Try parsing as an integer */
138 val = strtol(cp, &ep, 0);
139 if (*cp == '\0' || *ep != '\0' || val < 0 || val > 255)
140 return -1;
141 return val;
142 }
143
144 const char *
iptos2str(int iptos)145 iptos2str(int iptos)
146 {
147 int i;
148 static char iptos_str[sizeof "0xff"];
149 if (iptos < 0 || iptos > 64) iptos = 0;
150 for (i = 0; ipqos[i].name != NULL; i++) {
151 if (ipqos[i].value == iptos)
152 return ipqos[i].name;
153 }
154 snprintf(iptos_str, sizeof iptos_str, "0x%02x", iptos);
155 return iptos_str;
156 }
157