[SR-Dev] git:janakj/kcore: Added privacy header parser from kamailio to kcore lib

Module: sip-router Branch: janakj/kcore Commit: c1fe1a0f52caa32f099917a24815d12d199e86d6 URL: http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=c1fe1a0… Author: Daniel-Constantin Mierla &lt;miconda(a)gmail.com&gt; Committer: Jan Janak &lt;jan(a)iptel.org&gt; Date: Fri Mar 27 08:25:33 2009 +0100 Added privacy header parser from kamailio to kcore lib Signed-off-by: Jan Janak &lt;jan(a)iptel.org&gt; --- lib/kcore/parse_privacy.c | 226 +++++++++++++++++++++++++++++++++++++++++++++ lib/kcore/parse_privacy.h | 74 +++++++++++++++ 2 files changed, 300 insertions(+), 0 deletions(-) diff --git a/lib/kcore/parse_privacy.c b/lib/kcore/parse_privacy.c new file mode 100644 index 0000000..6b5e78f --- /dev/null +++ b/lib/kcore/parse_privacy.c @@ -0,0 +1,226 @@ +/* + * $Id: parse_privacy.c 4720 2008-08-23 10:56:15Z henningw $ + * + * Copyright (c) 2006 Juha Heinanen + * + * This file is part of Kamailio, a free SIP server. + * + * Kamailio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version + * + * Kamailio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * History: + * ------- + * 2006-12-18 Introduced parsing of Privacy header (RFC 3323) + */ + +/*! + * \file + * \brief Privacy value parser + * \ingroup parser + */ + +#include <stdlib.h> +#include <string.h> +#include "../../dprint.h" +#include "../../trim.h" +#include "parse_privacy.h" +#include "../../parser/msg_parser.h" + + +/*! + * Parse a privacy value pointed by start that can be at most max_len long. + * \return length of matched privacy value on success or NULL otherwise + */ +unsigned int parse_priv_value(char* start, unsigned int max_len, + unsigned int* value) +{ + unsigned int len; + + if (!start || !value) { + LM_ERR("invalid parameter value\n"); + return 0; + } + + switch (start[0]) { + + case 'c': + case 'C': + if(max_len < 8) + return 0; + if (strncasecmp(start, "critical", 8) == 0) { + *value = PRIVACY_CRITICAL; + len = 8; + break; + } else { + return 0; + } + + case 'h': + case 'H': + if (max_len < 6) + return 0; + if (strncasecmp(start, "header", 6) == 0) { + *value = PRIVACY_HEADER; + len = 6; + break; + } + if (max_len < 7) + return 0; + if (strncasecmp(start, "history", 7) == 0) { + *value = PRIVACY_HISTORY; + len = 7; + break; + } else { + return 0; + } + + case 'i': + case 'I': + if(max_len < 2) + return 0; + if (start[1] == 'd' || start[1] == 'D') { + *value = PRIVACY_ID; + len = 2; + break; + } else { + return 0; + } + + case 'n': + case 'N': + if(max_len < 4) + return 0; + if (strncasecmp(start, "none", 4) == 0) { + *value = PRIVACY_NONE; + len = 4; + break; + } else { + return 0; + } + + case 's': + case 'S': + if(max_len < 7) + return 0; + if (strncasecmp(start, "session", 7) == 0) { + *value = PRIVACY_SESSION; + len = 7; + break; + } else { + return 0; + } + + case 'u': + case 'U': + if(max_len < 4) + return 0; + if (strncasecmp(start, "user", 4) == 0) { + *value = PRIVACY_USER; + len = 4; + break; + } else { + return 0; + } + + default: + return 0; + } + + if(len < max_len) { + if(start[len] != '\0' && start[len] != ';' && start[len] != ' ' + && start[len] != '\t' && start[len] != '\r' && start[len] != '\n') + return 0; + } + + return len; +} + + +/*! + * This method is used to parse Privacy HF body, which consist of + * comma separated list of priv-values. After parsing, msg->privacy->parsed + * contains enum bits of privacy values defined in parse_privacy.h. + * \return 0 on success and -1 on failure. + */ +int parse_privacy(struct sip_msg *msg) +{ + unsigned int val_len, value, values, len; + str next; + char *p, *beyond; + + /* maybe the header is already parsed! */ + if (msg->privacy && msg->privacy->parsed) + return 0; + + /* parse Privacy HF (there should be only one) */ + if (!msg->privacy && + (parse_headers(msg, HDR_PRIVACY_F, 0) == -1 || !msg->privacy)) { + return -1; + } + + next.len = msg->privacy->body.len; + next.s = msg->privacy->body.s; + + trim_leading(&next); + + if (next.len == 0) { + LM_ERR("no values\n"); + return -1; + } + + values = 0; + p = next.s; + len = next.len; + beyond = p + len; + + while (p < beyond) { + if((val_len = parse_priv_value(p, len, &value)) != 0) { + values |= value; + p = p + val_len; + len = len - val_len; + } else { + LM_ERR("invalid privacy value\n"); + return -1; + } + + while(p < beyond && (*p == ' ' || *p == '\t' + || *p == '\r' || *p == '\n')) + p++; + + if(p >= beyond) break; + + if (*p == ';') { + p++; + while(p < beyond && (*p == ' ' || *p == '\t' + || *p == '\r' || *p == '\n')) + p++; + if(p >= beyond) { + LM_ERR("no privacy value after comma\n"); + return -1; + } + } else { + LM_ERR("semicolon expected\n"); + return -1; + } + } + + if ((values & PRIVACY_NONE) && (values ^ PRIVACY_NONE)) { + LM_ERR("no other privacy values allowed with 'none'\n"); + return -1; + } + + msg->privacy->parsed = (void *)(long)values; + + return 0; +} diff --git a/lib/kcore/parse_privacy.h b/lib/kcore/parse_privacy.h new file mode 100644 index 0000000..41a46ad --- /dev/null +++ b/lib/kcore/parse_privacy.h @@ -0,0 +1,74 @@ +/* + * $Id: parse_privacy.h 4720 2008-08-23 10:56:15Z henningw $ + * + * Copyright (c) 2006 Juha Heinanen + * + * This file is part of Kamailio, a free SIP server. + * + * Kamailio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version + * + * Kamailio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/*! + * \file + * \brief Privacy value parser + * \ingroup parser + */ + +#ifndef PARSE_PRIVACY_H +#define PARSE_PRIVACY_H + +#include "../../mem/mem.h" +#include "../../parser/msg_parser.h" + + +/*! bitmap of Privacy header privacy values + * (http://www.iana.org/assignments/sip-priv-values) + */ +enum privacy_value { + PRIVACY_USER=1, + PRIVACY_HEADER=2, + PRIVACY_SESSION=4, + PRIVACY_NONE=8, + PRIVACY_CRITICAL=16, + PRIVACY_ID=32, + PRIVACY_HISTORY=64 +}; + + +/*! + * casting macro for accessing enumeration of priv-values + */ +#define get_privacy_values(p_msg) \ + ((unsigned int)(long)((p_msg)->privacy->parsed)) + + +/*! + * This method is used to parse Privacy HF body, which consist of + * comma separated list of priv-values. After parsing, msg->privacy->parsed + * contains enum bits of privacy values defined in parse_privacy.h. + * \return 0 on success and -1 on failure. + */ +int parse_privacy(struct sip_msg *msg); + + +/*! + * Parse a privacy value pointed by start that can be at most max_len long. + * \return length of matched privacy value on success or NULL otherwise + */ +unsigned int parse_priv_value(char* start, unsigned int max_len, + unsigned int* value); + + +#endif /* PARSE_PRIVACY_H */