[1998] | 1 | //slp.c: |
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| 2 | |
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| 3 | /* |
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[4708] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2011 |
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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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[3517] | 21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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| 22 | * Boston, MA 02110-1301, USA. |
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[1998] | 23 | * |
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| 24 | * NOTE for everyone want's to change something and send patches: |
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| 25 | * read README and HACKING! There a addition information on |
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| 26 | * the license of this document you need to read before you send |
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| 27 | * any patches. |
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| 28 | * |
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| 29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 30 | * or libpulse*: |
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| 31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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| 32 | * and are therefore GPL. Because of this it may be illigal to use |
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| 33 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 34 | */ |
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| 35 | |
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| 36 | #include "libroar.h" |
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| 37 | |
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[3788] | 38 | #if defined(ROAR_HAVE_LIBSLP) && defined(ROAR_HAVE_TIME) |
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| 39 | #define _CAN_OPERATE |
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| 40 | #endif |
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| 41 | |
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[2004] | 42 | SLPBoolean roar_slp_url_callback(SLPHandle hslp, |
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| 43 | const char * srvurl, |
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| 44 | unsigned short lifetime, |
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| 45 | SLPError errcode, |
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[2005] | 46 | void * cookie) { |
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[3788] | 47 | #ifdef _CAN_OPERATE |
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[2005] | 48 | struct roar_slp_cookie * self = cookie; |
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| 49 | |
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[2008] | 50 | ROAR_DBG("roar_slp_url_callback(*) = ?"); |
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[2007] | 51 | |
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[2005] | 52 | if (errcode == SLP_OK || errcode == SLP_LAST_CALL) { |
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[2007] | 53 | self->callbackerr = SLP_OK; |
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| 54 | |
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| 55 | if ( srvurl == NULL ) /* hu? */ |
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| 56 | return SLP_TRUE; |
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[2005] | 57 | |
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| 58 | if ( self->matchcount == ROAR_SLP_MAX_MATCHES ) |
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| 59 | return SLP_FALSE; |
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| 60 | |
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[2007] | 61 | strncpy(self->match[self->matchcount].url, srvurl, ROAR_SLP_MAX_URL_LEN); |
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[2005] | 62 | |
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| 63 | self->match[self->matchcount].url[ROAR_SLP_MAX_URL_LEN-1] = 0; |
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[2007] | 64 | |
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[2013] | 65 | self->match[self->matchcount].tod = time(NULL); |
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| 66 | self->match[self->matchcount].tod += lifetime; |
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| 67 | |
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[2007] | 68 | self->matchcount++; |
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[2005] | 69 | } else { |
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[2007] | 70 | self->callbackerr = errcode; |
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[2005] | 71 | } |
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| 72 | |
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[2007] | 73 | |
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[2005] | 74 | /* return SLP_TRUE because we want to be called again */ |
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| 75 | /* if more services were found */ |
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| 76 | |
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| 77 | return SLP_TRUE; |
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[2027] | 78 | #else |
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| 79 | return SLP_FALSE; |
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| 80 | #endif |
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[2005] | 81 | } |
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[2004] | 82 | |
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| 83 | int roar_slp_search (struct roar_slp_cookie * cookie, char * type) { |
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[3788] | 84 | #ifdef _CAN_OPERATE |
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[2004] | 85 | SLPError err; |
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| 86 | SLPHandle hslp; |
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| 87 | |
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[2008] | 88 | ROAR_DBG("roar_slp_search(cookie=%p, type='%s') = ?", cookie, type); |
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[2007] | 89 | |
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[2004] | 90 | if ( cookie->search != NULL ) /* currently only non-search filter mode supported */ |
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| 91 | return -1; |
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| 92 | |
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| 93 | err = SLPOpen("en", SLP_FALSE, &hslp); |
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| 94 | if (err != SLP_OK) { |
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| 95 | return -1; |
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| 96 | } |
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| 97 | |
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[2008] | 98 | ROAR_DBG("roar_slp_search(*) = ?"); |
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[2007] | 99 | |
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[2004] | 100 | err = SLPFindSrvs(hslp, |
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| 101 | type, |
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| 102 | 0, /* use configured scopes */ |
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| 103 | 0, /* no attr filter */ |
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| 104 | roar_slp_url_callback, |
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[2007] | 105 | cookie); |
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| 106 | |
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[2008] | 107 | ROAR_DBG("roar_slp_search(*) = ?"); |
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[2004] | 108 | |
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| 109 | /* err may contain an error code that occurred as the slp library */ |
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| 110 | /* _prepared_ to make the call. */ |
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[2007] | 111 | if (err != SLP_OK) { |
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[2004] | 112 | return -1; |
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| 113 | } |
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| 114 | |
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| 115 | /* callbackerr may contain an error code (that was assigned through */ |
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| 116 | /* the callback cookie) that occurred as slp packets were sent on */ |
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| 117 | /* the wire */ |
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[2007] | 118 | if (cookie->callbackerr != SLP_OK) { |
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[2004] | 119 | return -1; |
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| 120 | } |
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| 121 | |
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[2008] | 122 | ROAR_DBG("roar_slp_search(*) = ?"); |
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[2007] | 123 | |
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[2004] | 124 | /* Now that we're done using slp, close the slp handle */ |
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[2007] | 125 | //SLPClose(hslp); |
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[2004] | 126 | |
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[2008] | 127 | ROAR_DBG("roar_slp_search(*) = ?"); |
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[2007] | 128 | |
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| 129 | return 0; |
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[2004] | 130 | #else |
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| 131 | return -1; |
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| 132 | #endif |
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| 133 | } |
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| 134 | |
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| 135 | int roar_slp_cookie_init (struct roar_slp_cookie * cookie, struct roar_slp_search * search) { |
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| 136 | if ( cookie == NULL ) |
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| 137 | return -1; |
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| 138 | |
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| 139 | memset(cookie, 0, sizeof(struct roar_slp_cookie)); |
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| 140 | |
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| 141 | cookie->search = search; |
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| 142 | |
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| 143 | return 0; |
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| 144 | } |
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| 145 | |
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| 146 | |
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[2014] | 147 | char * roar_slp_find_roard (int nocache) { |
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[2002] | 148 | static char addr[80]; |
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| 149 | |
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[2014] | 150 | if ( roar_slp_find_roard_r(addr, 80, nocache) == -1 ) |
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[2002] | 151 | return NULL; |
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| 152 | |
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| 153 | return addr; |
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| 154 | } |
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| 155 | |
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[2014] | 156 | int roar_slp_find_roard_r (char * addr, size_t len, int nocache) { |
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[3788] | 157 | #ifdef _CAN_OPERATE |
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[2013] | 158 | static struct roar_slp_match cache = {"", 0}; |
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| 159 | struct roar_slp_cookie cookie; |
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| 160 | int offset = 0; |
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| 161 | char * url; |
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[2007] | 162 | |
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[2008] | 163 | ROAR_DBG("roar_slp_find_roard_r(addr=%p, len=%i) = ?", addr, len); |
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[2004] | 164 | |
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| 165 | if ( addr == NULL || len == 0 ) |
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| 166 | return -1; |
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| 167 | |
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| 168 | *addr = 0; // just in case... |
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| 169 | |
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[2014] | 170 | if ( nocache || cache.tod < time(NULL) ) { |
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[2015] | 171 | #ifdef DEBUG |
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[2014] | 172 | if ( nocache ) { |
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[2015] | 173 | ROAR_DBG("roar_slp_find_roard_r(*): forced ignoring of cache, doing a new lookup."); |
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[2014] | 174 | } |
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[2015] | 175 | #endif |
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| 176 | ROAR_DBG("roar_slp_find_roard_r(*): cache too old, searching for a new server..."); |
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[2013] | 177 | ROAR_DBG("roar_slp_find_roard_r(*) = ?"); |
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| 178 | |
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| 179 | if ( roar_slp_cookie_init(&cookie, NULL) == -1 ) |
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| 180 | return -1; |
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[2007] | 181 | |
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[2013] | 182 | ROAR_DBG("roar_slp_find_roard_r(*) = ?"); |
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[2004] | 183 | |
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[2016] | 184 | if ( roar_slp_search(&cookie, ROAR_SLP_URL_TYPE) == -1 ) |
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[2013] | 185 | return -1; |
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| 186 | |
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| 187 | ROAR_DBG("roar_slp_find_roard_r(*) = ?"); |
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[2007] | 188 | |
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[2013] | 189 | if ( cookie.matchcount == 0 ) |
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| 190 | return -1; |
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[2004] | 191 | |
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[2013] | 192 | ROAR_DBG("roar_slp_find_roard_r(*) = ?"); |
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| 193 | |
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| 194 | url = cookie.match[0].url; |
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[2007] | 195 | |
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[2015] | 196 | ROAR_DBG("roar_slp_find_roard_r(*): found new server, caching it"); |
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[2013] | 197 | memcpy(&cache, &(cookie.match[0]), sizeof(cache)); |
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| 198 | } else { |
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[2015] | 199 | ROAR_DBG("roar_slp_find_roard_r(*): cache within TTL, no need to search for server, using cache."); |
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[2013] | 200 | url = cache.url; |
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| 201 | } |
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[2004] | 202 | |
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[2016] | 203 | if ( !strncmp(url, ROAR_SLP_URL_TYPE "://", ROAR_SLP_URL_TYPE_LEN + 3) ) |
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[2007] | 204 | offset = 28; |
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| 205 | |
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[2008] | 206 | ROAR_DBG("roar_slp_find_roard_r(*): url='%s'", cookie.match[0].url); |
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[2007] | 207 | |
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[2013] | 208 | strncpy(addr, &(url[offset]), len); |
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[2004] | 209 | addr[len-1] = 0; // also just in case. |
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| 210 | |
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[2008] | 211 | ROAR_DBG("roar_slp_find_roard_r(*): addr='%s'", addr); |
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[2007] | 212 | |
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[2004] | 213 | return 0; |
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[3788] | 214 | #else |
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| 215 | return -1; |
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| 216 | #endif |
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[2002] | 217 | } |
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| 218 | |
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[1998] | 219 | //ll |
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