[1998] | 1 | //slp.c: |
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| 2 | |
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| 3 | /* |
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[2002] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009 |
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[1998] | 5 | * |
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| 6 | * This file is part of libroar a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * libroar is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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| 21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 22 | * |
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| 23 | * NOTE for everyone want's to change something and send patches: |
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| 24 | * read README and HACKING! There a addition information on |
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| 25 | * the license of this document you need to read before you send |
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| 26 | * any patches. |
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| 27 | * |
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| 28 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 29 | * or libpulse*: |
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| 30 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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| 31 | * and are therefore GPL. Because of this it may be illigal to use |
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| 32 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 33 | */ |
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| 34 | |
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| 35 | #include "libroar.h" |
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| 36 | |
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[2004] | 37 | SLPBoolean roar_slp_url_callback(SLPHandle hslp, |
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| 38 | const char * srvurl, |
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| 39 | unsigned short lifetime, |
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| 40 | SLPError errcode, |
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[2005] | 41 | void * cookie) { |
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[2027] | 42 | #ifdef ROAR_HAVE_LIBSLP |
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[2005] | 43 | struct roar_slp_cookie * self = cookie; |
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| 44 | |
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[2008] | 45 | ROAR_DBG("roar_slp_url_callback(*) = ?"); |
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[2007] | 46 | |
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[2005] | 47 | if (errcode == SLP_OK || errcode == SLP_LAST_CALL) { |
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[2007] | 48 | self->callbackerr = SLP_OK; |
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| 49 | |
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| 50 | if ( srvurl == NULL ) /* hu? */ |
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| 51 | return SLP_TRUE; |
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[2005] | 52 | |
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| 53 | if ( self->matchcount == ROAR_SLP_MAX_MATCHES ) |
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| 54 | return SLP_FALSE; |
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| 55 | |
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[2007] | 56 | strncpy(self->match[self->matchcount].url, srvurl, ROAR_SLP_MAX_URL_LEN); |
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[2005] | 57 | |
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| 58 | self->match[self->matchcount].url[ROAR_SLP_MAX_URL_LEN-1] = 0; |
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[2007] | 59 | |
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[2013] | 60 | self->match[self->matchcount].tod = time(NULL); |
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| 61 | self->match[self->matchcount].tod += lifetime; |
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| 62 | |
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[2007] | 63 | self->matchcount++; |
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[2005] | 64 | } else { |
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[2007] | 65 | self->callbackerr = errcode; |
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[2005] | 66 | } |
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| 67 | |
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[2007] | 68 | |
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[2005] | 69 | /* return SLP_TRUE because we want to be called again */ |
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| 70 | /* if more services were found */ |
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| 71 | |
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| 72 | return SLP_TRUE; |
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[2027] | 73 | #else |
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| 74 | return SLP_FALSE; |
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| 75 | #endif |
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[2005] | 76 | } |
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[2004] | 77 | |
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| 78 | int roar_slp_search (struct roar_slp_cookie * cookie, char * type) { |
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| 79 | #ifdef ROAR_HAVE_LIBSLP |
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| 80 | SLPError err; |
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| 81 | SLPHandle hslp; |
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| 82 | |
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[2008] | 83 | ROAR_DBG("roar_slp_search(cookie=%p, type='%s') = ?", cookie, type); |
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[2007] | 84 | |
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[2004] | 85 | if ( cookie->search != NULL ) /* currently only non-search filter mode supported */ |
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| 86 | return -1; |
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| 87 | |
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| 88 | err = SLPOpen("en", SLP_FALSE, &hslp); |
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| 89 | if (err != SLP_OK) { |
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| 90 | return -1; |
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| 91 | } |
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| 92 | |
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[2008] | 93 | ROAR_DBG("roar_slp_search(*) = ?"); |
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[2007] | 94 | |
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[2004] | 95 | err = SLPFindSrvs(hslp, |
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| 96 | type, |
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| 97 | 0, /* use configured scopes */ |
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| 98 | 0, /* no attr filter */ |
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| 99 | roar_slp_url_callback, |
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[2007] | 100 | cookie); |
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| 101 | |
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[2008] | 102 | ROAR_DBG("roar_slp_search(*) = ?"); |
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[2004] | 103 | |
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| 104 | /* err may contain an error code that occurred as the slp library */ |
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| 105 | /* _prepared_ to make the call. */ |
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[2007] | 106 | if (err != SLP_OK) { |
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[2004] | 107 | return -1; |
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| 108 | } |
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| 109 | |
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| 110 | /* callbackerr may contain an error code (that was assigned through */ |
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| 111 | /* the callback cookie) that occurred as slp packets were sent on */ |
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| 112 | /* the wire */ |
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[2007] | 113 | if (cookie->callbackerr != SLP_OK) { |
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[2004] | 114 | return -1; |
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| 115 | } |
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| 116 | |
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[2008] | 117 | ROAR_DBG("roar_slp_search(*) = ?"); |
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[2007] | 118 | |
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[2004] | 119 | /* Now that we're done using slp, close the slp handle */ |
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[2007] | 120 | //SLPClose(hslp); |
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[2004] | 121 | |
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[2008] | 122 | ROAR_DBG("roar_slp_search(*) = ?"); |
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[2007] | 123 | |
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| 124 | return 0; |
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[2004] | 125 | #else |
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| 126 | return -1; |
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| 127 | #endif |
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| 128 | } |
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| 129 | |
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| 130 | int roar_slp_cookie_init (struct roar_slp_cookie * cookie, struct roar_slp_search * search) { |
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| 131 | if ( cookie == NULL ) |
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| 132 | return -1; |
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| 133 | |
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| 134 | memset(cookie, 0, sizeof(struct roar_slp_cookie)); |
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| 135 | |
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| 136 | cookie->search = search; |
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| 137 | |
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| 138 | return 0; |
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| 139 | } |
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| 140 | |
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| 141 | |
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[2014] | 142 | char * roar_slp_find_roard (int nocache) { |
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[2002] | 143 | static char addr[80]; |
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| 144 | |
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[2014] | 145 | if ( roar_slp_find_roard_r(addr, 80, nocache) == -1 ) |
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[2002] | 146 | return NULL; |
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| 147 | |
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| 148 | return addr; |
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| 149 | } |
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| 150 | |
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[2014] | 151 | int roar_slp_find_roard_r (char * addr, size_t len, int nocache) { |
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[2013] | 152 | static struct roar_slp_match cache = {"", 0}; |
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| 153 | struct roar_slp_cookie cookie; |
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| 154 | int offset = 0; |
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| 155 | char * url; |
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[2007] | 156 | |
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[2008] | 157 | ROAR_DBG("roar_slp_find_roard_r(addr=%p, len=%i) = ?", addr, len); |
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[2004] | 158 | |
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| 159 | if ( addr == NULL || len == 0 ) |
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| 160 | return -1; |
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| 161 | |
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| 162 | *addr = 0; // just in case... |
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| 163 | |
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[2014] | 164 | if ( nocache || cache.tod < time(NULL) ) { |
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[2015] | 165 | #ifdef DEBUG |
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[2014] | 166 | if ( nocache ) { |
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[2015] | 167 | ROAR_DBG("roar_slp_find_roard_r(*): forced ignoring of cache, doing a new lookup."); |
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[2014] | 168 | } |
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[2015] | 169 | #endif |
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| 170 | ROAR_DBG("roar_slp_find_roard_r(*): cache too old, searching for a new server..."); |
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[2013] | 171 | ROAR_DBG("roar_slp_find_roard_r(*) = ?"); |
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| 172 | |
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| 173 | if ( roar_slp_cookie_init(&cookie, NULL) == -1 ) |
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| 174 | return -1; |
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[2007] | 175 | |
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[2013] | 176 | ROAR_DBG("roar_slp_find_roard_r(*) = ?"); |
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[2004] | 177 | |
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[2016] | 178 | if ( roar_slp_search(&cookie, ROAR_SLP_URL_TYPE) == -1 ) |
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[2013] | 179 | return -1; |
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| 180 | |
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| 181 | ROAR_DBG("roar_slp_find_roard_r(*) = ?"); |
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[2007] | 182 | |
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[2013] | 183 | if ( cookie.matchcount == 0 ) |
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| 184 | return -1; |
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[2004] | 185 | |
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[2013] | 186 | ROAR_DBG("roar_slp_find_roard_r(*) = ?"); |
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| 187 | |
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| 188 | url = cookie.match[0].url; |
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[2007] | 189 | |
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[2015] | 190 | ROAR_DBG("roar_slp_find_roard_r(*): found new server, caching it"); |
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[2013] | 191 | memcpy(&cache, &(cookie.match[0]), sizeof(cache)); |
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| 192 | } else { |
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[2015] | 193 | ROAR_DBG("roar_slp_find_roard_r(*): cache within TTL, no need to search for server, using cache."); |
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[2013] | 194 | url = cache.url; |
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| 195 | } |
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[2004] | 196 | |
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[2016] | 197 | if ( !strncmp(url, ROAR_SLP_URL_TYPE "://", ROAR_SLP_URL_TYPE_LEN + 3) ) |
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[2007] | 198 | offset = 28; |
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| 199 | |
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[2008] | 200 | ROAR_DBG("roar_slp_find_roard_r(*): url='%s'", cookie.match[0].url); |
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[2007] | 201 | |
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[2013] | 202 | strncpy(addr, &(url[offset]), len); |
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[2004] | 203 | addr[len-1] = 0; // also just in case. |
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| 204 | |
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[2008] | 205 | ROAR_DBG("roar_slp_find_roard_r(*): addr='%s'", addr); |
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[2007] | 206 | |
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[2004] | 207 | return 0; |
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[2002] | 208 | } |
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| 209 | |
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[1998] | 210 | //ll |
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