[1998] | 1 | //slp.c: |
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| 2 | |
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| 3 | /* |
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[5381] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2012 |
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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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[5270] | 50 | (void)hslp; |
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| 51 | |
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[2008] | 52 | ROAR_DBG("roar_slp_url_callback(*) = ?"); |
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[2007] | 53 | |
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[2005] | 54 | if (errcode == SLP_OK || errcode == SLP_LAST_CALL) { |
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[2007] | 55 | self->callbackerr = SLP_OK; |
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| 56 | |
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| 57 | if ( srvurl == NULL ) /* hu? */ |
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| 58 | return SLP_TRUE; |
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[2005] | 59 | |
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| 60 | if ( self->matchcount == ROAR_SLP_MAX_MATCHES ) |
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| 61 | return SLP_FALSE; |
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| 62 | |
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[2007] | 63 | strncpy(self->match[self->matchcount].url, srvurl, ROAR_SLP_MAX_URL_LEN); |
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[2005] | 64 | |
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| 65 | self->match[self->matchcount].url[ROAR_SLP_MAX_URL_LEN-1] = 0; |
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[2007] | 66 | |
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[2013] | 67 | self->match[self->matchcount].tod = time(NULL); |
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| 68 | self->match[self->matchcount].tod += lifetime; |
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| 69 | |
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[2007] | 70 | self->matchcount++; |
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[2005] | 71 | } else { |
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[2007] | 72 | self->callbackerr = errcode; |
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[2005] | 73 | } |
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| 74 | |
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[2007] | 75 | |
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[2005] | 76 | /* return SLP_TRUE because we want to be called again */ |
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| 77 | /* if more services were found */ |
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| 78 | |
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| 79 | return SLP_TRUE; |
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[2027] | 80 | #else |
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| 81 | return SLP_FALSE; |
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| 82 | #endif |
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[2005] | 83 | } |
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[2004] | 84 | |
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| 85 | int roar_slp_search (struct roar_slp_cookie * cookie, char * type) { |
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[3788] | 86 | #ifdef _CAN_OPERATE |
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[2004] | 87 | SLPError err; |
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| 88 | SLPHandle hslp; |
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| 89 | |
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[2008] | 90 | ROAR_DBG("roar_slp_search(cookie=%p, type='%s') = ?", cookie, type); |
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[2007] | 91 | |
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[2004] | 92 | if ( cookie->search != NULL ) /* currently only non-search filter mode supported */ |
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| 93 | return -1; |
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| 94 | |
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| 95 | err = SLPOpen("en", SLP_FALSE, &hslp); |
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| 96 | if (err != SLP_OK) { |
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| 97 | return -1; |
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| 98 | } |
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| 99 | |
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[2008] | 100 | ROAR_DBG("roar_slp_search(*) = ?"); |
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[2007] | 101 | |
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[2004] | 102 | err = SLPFindSrvs(hslp, |
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| 103 | type, |
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| 104 | 0, /* use configured scopes */ |
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| 105 | 0, /* no attr filter */ |
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| 106 | roar_slp_url_callback, |
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[2007] | 107 | cookie); |
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| 108 | |
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[2008] | 109 | ROAR_DBG("roar_slp_search(*) = ?"); |
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[2004] | 110 | |
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| 111 | /* err may contain an error code that occurred as the slp library */ |
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| 112 | /* _prepared_ to make the call. */ |
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[2007] | 113 | if (err != SLP_OK) { |
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[2004] | 114 | return -1; |
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| 115 | } |
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| 116 | |
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| 117 | /* callbackerr may contain an error code (that was assigned through */ |
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| 118 | /* the callback cookie) that occurred as slp packets were sent on */ |
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| 119 | /* the wire */ |
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[2007] | 120 | if (cookie->callbackerr != SLP_OK) { |
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[2004] | 121 | return -1; |
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| 122 | } |
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| 123 | |
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[2008] | 124 | ROAR_DBG("roar_slp_search(*) = ?"); |
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[2007] | 125 | |
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[2004] | 126 | /* Now that we're done using slp, close the slp handle */ |
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[2007] | 127 | //SLPClose(hslp); |
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[2004] | 128 | |
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[2008] | 129 | ROAR_DBG("roar_slp_search(*) = ?"); |
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[2007] | 130 | |
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| 131 | return 0; |
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[2004] | 132 | #else |
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| 133 | return -1; |
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| 134 | #endif |
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| 135 | } |
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| 136 | |
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| 137 | int roar_slp_cookie_init (struct roar_slp_cookie * cookie, struct roar_slp_search * search) { |
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| 138 | if ( cookie == NULL ) |
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| 139 | return -1; |
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| 140 | |
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| 141 | memset(cookie, 0, sizeof(struct roar_slp_cookie)); |
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| 142 | |
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| 143 | cookie->search = search; |
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| 144 | |
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| 145 | return 0; |
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| 146 | } |
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| 147 | |
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| 148 | |
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[2014] | 149 | char * roar_slp_find_roard (int nocache) { |
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[2002] | 150 | static char addr[80]; |
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| 151 | |
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[4805] | 152 | if ( roar_slp_find_roard_r(addr, sizeof(addr), nocache) == -1 ) |
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[2002] | 153 | return NULL; |
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| 154 | |
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| 155 | return addr; |
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| 156 | } |
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| 157 | |
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[2014] | 158 | int roar_slp_find_roard_r (char * addr, size_t len, int nocache) { |
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[3788] | 159 | #ifdef _CAN_OPERATE |
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[2013] | 160 | static struct roar_slp_match cache = {"", 0}; |
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| 161 | struct roar_slp_cookie cookie; |
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| 162 | int offset = 0; |
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| 163 | char * url; |
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[2007] | 164 | |
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[2008] | 165 | ROAR_DBG("roar_slp_find_roard_r(addr=%p, len=%i) = ?", addr, len); |
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[2004] | 166 | |
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| 167 | if ( addr == NULL || len == 0 ) |
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| 168 | return -1; |
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| 169 | |
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| 170 | *addr = 0; // just in case... |
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| 171 | |
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[2014] | 172 | if ( nocache || cache.tod < time(NULL) ) { |
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[2015] | 173 | #ifdef DEBUG |
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[2014] | 174 | if ( nocache ) { |
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[2015] | 175 | ROAR_DBG("roar_slp_find_roard_r(*): forced ignoring of cache, doing a new lookup."); |
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[2014] | 176 | } |
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[2015] | 177 | #endif |
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| 178 | ROAR_DBG("roar_slp_find_roard_r(*): cache too old, searching for a new server..."); |
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[2013] | 179 | ROAR_DBG("roar_slp_find_roard_r(*) = ?"); |
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| 180 | |
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| 181 | if ( roar_slp_cookie_init(&cookie, NULL) == -1 ) |
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| 182 | return -1; |
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[2007] | 183 | |
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[2013] | 184 | ROAR_DBG("roar_slp_find_roard_r(*) = ?"); |
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[2004] | 185 | |
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[2016] | 186 | if ( roar_slp_search(&cookie, ROAR_SLP_URL_TYPE) == -1 ) |
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[2013] | 187 | return -1; |
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| 188 | |
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| 189 | ROAR_DBG("roar_slp_find_roard_r(*) = ?"); |
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[2007] | 190 | |
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[2013] | 191 | if ( cookie.matchcount == 0 ) |
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| 192 | return -1; |
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[2004] | 193 | |
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[2013] | 194 | ROAR_DBG("roar_slp_find_roard_r(*) = ?"); |
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| 195 | |
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| 196 | url = cookie.match[0].url; |
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[2007] | 197 | |
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[2015] | 198 | ROAR_DBG("roar_slp_find_roard_r(*): found new server, caching it"); |
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[2013] | 199 | memcpy(&cache, &(cookie.match[0]), sizeof(cache)); |
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| 200 | } else { |
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[2015] | 201 | ROAR_DBG("roar_slp_find_roard_r(*): cache within TTL, no need to search for server, using cache."); |
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[2013] | 202 | url = cache.url; |
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| 203 | } |
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[2004] | 204 | |
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[2016] | 205 | if ( !strncmp(url, ROAR_SLP_URL_TYPE "://", ROAR_SLP_URL_TYPE_LEN + 3) ) |
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[2007] | 206 | offset = 28; |
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| 207 | |
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[2008] | 208 | ROAR_DBG("roar_slp_find_roard_r(*): url='%s'", cookie.match[0].url); |
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[2007] | 209 | |
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[2013] | 210 | strncpy(addr, &(url[offset]), len); |
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[2004] | 211 | addr[len-1] = 0; // also just in case. |
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| 212 | |
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[2008] | 213 | ROAR_DBG("roar_slp_find_roard_r(*): addr='%s'", addr); |
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[2007] | 214 | |
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[2004] | 215 | return 0; |
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[3788] | 216 | #else |
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| 217 | return -1; |
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| 218 | #endif |
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[2002] | 219 | } |
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| 220 | |
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[1998] | 221 | //ll |
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