Commit | Line | Data |
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2340bcd3 JVH |
1 | #include <stdlib.h> |
2 | #include <string.h> | |
3 | #include <assert.h> | |
4 | ||
5 | #include "sdp.h" | |
6 | ||
7 | struct sdp_s { | |
8 | char *data; | |
9 | ||
10 | /* Actual SDP records */ | |
11 | const char *version; | |
12 | const char *origin; | |
13 | const char *connection; | |
14 | const char *session; | |
15 | const char *time; | |
16 | const char *media; | |
17 | ||
18 | /* Additional SDP records */ | |
19 | const char *rtpmap; | |
20 | const char *fmtp; | |
21 | const char *rsaaeskey; | |
22 | const char *aesiv; | |
23 | const char *min_latency; | |
24 | }; | |
25 | ||
26 | static void | |
27 | parse_sdp_line(sdp_t *sdp, char *line) | |
28 | { | |
29 | int len = strlen(line); | |
30 | if (len < 2 || line[1] != '=') { | |
31 | return; | |
32 | } | |
33 | ||
34 | switch (line[0]) { | |
35 | case 'v': | |
36 | sdp->version = &line[2]; | |
37 | break; | |
38 | case 'o': | |
39 | sdp->origin = &line[2]; | |
40 | break; | |
41 | case 's': | |
42 | sdp->session = &line[2]; | |
43 | break; | |
44 | case 'c': | |
45 | sdp->connection = &line[2]; | |
46 | break; | |
47 | case 't': | |
48 | sdp->time = &line[2]; | |
49 | break; | |
50 | case 'm': | |
51 | sdp->media = &line[2]; | |
52 | break; | |
53 | case 'a': | |
54 | { | |
55 | char *key; | |
56 | char *value; | |
57 | ||
58 | /* Parse key and value */ | |
59 | key = &line[2]; | |
60 | value = strstr(line, ":"); | |
61 | if (!value) break; | |
62 | *(value++) = '\0'; | |
63 | ||
64 | if (!strcmp(key, "rtpmap")) { | |
65 | sdp->rtpmap = value; | |
66 | } else if (!strcmp(key, "fmtp")) { | |
67 | sdp->fmtp = value; | |
68 | } else if (!strcmp(key, "rsaaeskey")) { | |
69 | sdp->rsaaeskey = value; | |
70 | } else if (!strcmp(key, "aesiv")) { | |
71 | sdp->aesiv = value; | |
72 | } else if (!strcmp(key, "min-latency")) { | |
73 | sdp->min_latency = value; | |
74 | } | |
75 | break; | |
76 | } | |
77 | } | |
78 | } | |
79 | ||
80 | static void | |
81 | parse_sdp_data(sdp_t *sdp) | |
82 | { | |
83 | int pos, len; | |
84 | ||
85 | pos = 0; | |
86 | len = strlen(sdp->data); | |
87 | while (pos < len) { | |
88 | int lfpos; | |
89 | ||
90 | /* Find newline in string */ | |
91 | for (lfpos=pos; sdp->data[lfpos]; lfpos++) { | |
92 | if (sdp->data[lfpos] == '\n') { | |
93 | break; | |
94 | } | |
95 | } | |
96 | if (sdp->data[lfpos] != '\n') { | |
97 | break; | |
98 | } | |
99 | ||
100 | /* Replace newline with '\0' and parse line */ | |
101 | sdp->data[lfpos] = '\0'; | |
102 | if (lfpos > pos && sdp->data[lfpos-1] == '\r') { | |
103 | sdp->data[lfpos-1] = '\0'; | |
104 | } | |
105 | parse_sdp_line(sdp, sdp->data+pos); | |
106 | pos = lfpos+1; | |
107 | } | |
108 | } | |
109 | ||
110 | sdp_t * | |
111 | sdp_init(const char *sdpdata, int sdpdatalen) | |
112 | { | |
113 | sdp_t *sdp; | |
114 | ||
115 | sdp = calloc(1, sizeof(sdp_t)); | |
116 | if (!sdp) { | |
117 | return NULL; | |
118 | } | |
119 | ||
120 | /* Allocate data buffer */ | |
121 | sdp->data = malloc(sdpdatalen+1); | |
122 | if (!sdp->data) { | |
123 | free(sdp); | |
124 | return NULL; | |
125 | } | |
126 | memcpy(sdp->data, sdpdata, sdpdatalen); | |
127 | sdp->data[sdpdatalen] = '\0'; | |
128 | parse_sdp_data(sdp); | |
129 | return sdp; | |
130 | } | |
131 | ||
132 | void | |
133 | sdp_destroy(sdp_t *sdp) | |
134 | { | |
135 | if (sdp) { | |
136 | free(sdp->data); | |
137 | free(sdp); | |
138 | } | |
139 | } | |
140 | ||
141 | const char * | |
142 | sdp_get_version(sdp_t *sdp) | |
143 | { | |
144 | assert(sdp); | |
145 | ||
146 | return sdp->version; | |
147 | } | |
148 | ||
149 | const char * | |
150 | sdp_get_origin(sdp_t *sdp) | |
151 | { | |
152 | assert(sdp); | |
153 | ||
154 | return sdp->origin; | |
155 | } | |
156 | ||
157 | const char * | |
158 | sdp_get_session(sdp_t *sdp) | |
159 | { | |
160 | assert(sdp); | |
161 | ||
162 | return sdp->session; | |
163 | } | |
164 | ||
165 | const char * | |
166 | sdp_get_connection(sdp_t *sdp) | |
167 | { | |
168 | assert(sdp); | |
169 | ||
170 | return sdp->connection; | |
171 | } | |
172 | ||
173 | const char * | |
174 | sdp_get_time(sdp_t *sdp) | |
175 | { | |
176 | assert(sdp); | |
177 | ||
178 | return sdp->time; | |
179 | } | |
180 | ||
181 | const char * | |
182 | sdp_get_media(sdp_t *sdp) | |
183 | { | |
184 | assert(sdp); | |
185 | ||
186 | return sdp->media; | |
187 | } | |
188 | ||
189 | const char * | |
190 | sdp_get_rtpmap(sdp_t *sdp) | |
191 | { | |
192 | assert(sdp); | |
193 | ||
194 | return sdp->rtpmap; | |
195 | } | |
196 | ||
197 | const char * | |
198 | sdp_get_fmtp(sdp_t *sdp) | |
199 | { | |
200 | assert(sdp); | |
201 | ||
202 | return sdp->fmtp; | |
203 | } | |
204 | ||
205 | const char * | |
206 | sdp_get_rsaaeskey(sdp_t *sdp) | |
207 | { | |
208 | assert(sdp); | |
209 | ||
210 | return sdp->rsaaeskey; | |
211 | } | |
212 | ||
213 | const char * | |
214 | sdp_get_aesiv(sdp_t *sdp) | |
215 | { | |
216 | assert(sdp); | |
217 | ||
218 | return sdp->aesiv; | |
219 | } | |
220 | ||
221 | const char * | |
222 | sdp_get_min_latency(sdp_t *sdp) | |
223 | { | |
224 | assert(sdp); | |
225 | ||
226 | return sdp->min_latency; | |
227 | } | |
228 |