/src/kamailio/src/core/parser/parse_allow.c
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1 | | /* |
2 | | * Copyright (c) 2004 Juha Heinanen |
3 | | * |
4 | | * This file is part of Kamailio, a free SIP server. |
5 | | * |
6 | | * Kamailio is free software; you can redistribute it and/or modify |
7 | | * it under the terms of the GNU General Public License as published by |
8 | | * the Free Software Foundation; either version 2 of the License, or |
9 | | * (at your option) any later version |
10 | | * |
11 | | * Kamailio is distributed in the hope that it will be useful, |
12 | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | | * GNU General Public License for more details. |
15 | | * |
16 | | * You should have received a copy of the GNU General Public License |
17 | | * along with this program; if not, write to the Free Software |
18 | | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
19 | | */ |
20 | | |
21 | | /*! \file |
22 | | * \brief Parser :: Allow header |
23 | | * |
24 | | * \ingroup parser |
25 | | */ |
26 | | |
27 | | |
28 | | #include <stdlib.h> |
29 | | #include <string.h> |
30 | | #include "../dprint.h" |
31 | | #include "../mem/mem.h" |
32 | | #include "parse_allow.h" |
33 | | #include "parse_methods.h" |
34 | | #include "msg_parser.h" |
35 | | |
36 | | |
37 | | /*! \brief |
38 | | * This method is used to parse Allow header. |
39 | | * |
40 | | * \param _hf message header field |
41 | | * \return 0 on success, -1 on failure. |
42 | | */ |
43 | | int parse_allow_header(struct hdr_field *_hf) |
44 | 0 | { |
45 | 0 | struct allow_body *ab = 0; |
46 | |
|
47 | 0 | if(!_hf) { |
48 | 0 | LM_ERR("invalid parameter value\n"); |
49 | 0 | return -1; |
50 | 0 | } |
51 | | |
52 | | /* maybe the header is already parsed! */ |
53 | 0 | if(_hf->parsed) { |
54 | 0 | return 0; |
55 | 0 | } |
56 | | |
57 | 0 | ab = (struct allow_body *)pkg_malloc(sizeof(struct allow_body)); |
58 | 0 | if(ab == 0) { |
59 | 0 | PKG_MEM_ERROR; |
60 | 0 | return -1; |
61 | 0 | } |
62 | 0 | memset(ab, '\0', sizeof(struct allow_body)); |
63 | |
|
64 | 0 | if(parse_methods(&(_hf->body), &(ab->allow)) != 0) { |
65 | 0 | LM_ERR("bad allow body header\n"); |
66 | 0 | goto error; |
67 | 0 | } |
68 | | |
69 | 0 | ab->allow_all = 0; |
70 | 0 | _hf->parsed = (void *)ab; |
71 | 0 | return 0; |
72 | | |
73 | 0 | error: |
74 | 0 | if(ab) |
75 | 0 | pkg_free(ab); |
76 | 0 | return -1; |
77 | 0 | } |
78 | | |
79 | | /*! |
80 | | * \brief This method is used to parse all Allow HF body. |
81 | | * \param msg sip msg |
82 | | * \return 0 on success,-1 on failure. |
83 | | */ |
84 | | int parse_allow(struct sip_msg *msg) |
85 | 0 | { |
86 | 0 | unsigned int allow; |
87 | 0 | struct hdr_field *hdr; |
88 | | |
89 | | /* maybe the header is already parsed! */ |
90 | 0 | if(msg->allow && msg->allow->parsed) { |
91 | 0 | return 0; |
92 | 0 | } |
93 | | |
94 | | /* parse to the end in order to get all ALLOW headers */ |
95 | 0 | if(parse_headers(msg, HDR_EOH_F, 0) == -1 || !msg->allow) { |
96 | 0 | return -1; |
97 | 0 | } |
98 | 0 | allow = 0; |
99 | |
|
100 | 0 | for(hdr = msg->allow; hdr; hdr = next_sibling_hdr(hdr)) { |
101 | 0 | if(hdr->parsed == 0) { |
102 | 0 | if(parse_allow_header(hdr) < 0) { |
103 | 0 | return -1; |
104 | 0 | } |
105 | 0 | } |
106 | | |
107 | 0 | allow |= ((struct allow_body *)hdr->parsed)->allow; |
108 | 0 | } |
109 | | |
110 | 0 | ((struct allow_body *)msg->allow->parsed)->allow_all = allow; |
111 | 0 | return 0; |
112 | 0 | } |
113 | | |
114 | | |
115 | | /* |
116 | | * Release memory |
117 | | */ |
118 | | void free_allow_body(struct allow_body **ab) |
119 | 0 | { |
120 | 0 | if(ab && *ab) { |
121 | 0 | pkg_free(*ab); |
122 | 0 | *ab = 0; |
123 | 0 | } |
124 | 0 | } |
125 | | |
126 | | |
127 | | void free_allow_header(struct hdr_field *hf) |
128 | 0 | { |
129 | 0 | free_allow_body((struct allow_body **)(void *)(&(hf->parsed))); |
130 | 0 | } |