Date Header Field parsing funcions and macros

First release

parser/case_date.h

@@ -0,0 +1,41 @@
+/* 
+ * $Id$ 
+ *
+ * Date Header Field Name Parsing Macros
+ *
+ * Copyright (c) 2007 iptelorg GmbH
+ *
+ * This file is part of ser, a free SIP server.
+ *
+ * ser 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
+ *
+ * For a license to use the ser software under conditions
+ * other than those described here, or to purchase support for this
+ * software, please contact iptel.org by e-mail at the following addresses:
+ *    info@iptel.org
+ *
+ * ser 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
+ */
+
+
+#ifndef CASE_DATE_H
+#define CASE_DATE_H
+
+
+#define date_CASE          \
+     hdr->type = HDR_DATE_T; \
+     p += 4;               \
+     goto dc_end
+
+
+#endif /* CASE_DATE_H */

parser/parse_date.c

@@ -0,0 +1,182 @@
+/*
+ * $Id$ 
+ *
+ * Copyright (c) 2007 iptelorg GmbH
+ *
+ * This file is part of ser, a free SIP server.
+ *
+ * ser 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
+ *
+ * For a license to use the ser software under conditions
+ * other than those described here, or to purchase support for this
+ * software, please contact iptel.org by e-mail at the following addresses:
+ *    info@iptel.org
+ *
+ * ser 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
+ */
+
+
+#include <string.h>
+#include "parse_date.h"
+#include "parse_def.h"
+#include "parser_f.h"  /* eat_space_end and so on */
+#include "../mem/mem.h"
+
+/*
+ * Parse Date header field
+ */
+
+#define READ(val) \
+(*(val + 0) + (*(val + 1) << 8) + (*(val + 2) << 16) + (*(val + 3) << 24))
+
+/*
+ * Converts a RFC 1123 formatted date string to stuct tm
+ */
+int rfc1123totm (char *stime, struct tm *ttm ) {
+	char *ptime = stime;
+	unsigned int uval;
+	int ires;
+
+	int char2int (char *p, int *t){
+		if (*p < '0' || *p > '9' || *(p + 1) < '0' || *(p + 1) > '9') return -1;
+		*t = (*p - '0')*10 + *(p + 1) - '0';
+
+		return 0;
+	}
+
+	uval = READ(ptime);
+	ptime+=4;
+	switch (uval) {
+		/* Sun, */
+		case 0x2c6e7553: ttm->tm_wday = 0; break;
+		/* Mon, */
+		case 0x2c6e6f4d: ttm->tm_wday = 1; break;
+		/* Tue, */
+		case 0x2c657554: ttm->tm_wday = 2; break;
+		/* Wed, */
+		case 0x2c646557: ttm->tm_wday = 3; break;
+		/* Thu, */
+		case 0x2c756854: ttm->tm_wday = 4; break;
+		/* Fri, */
+		case 0x2c697246: ttm->tm_wday = 5; break;
+		/* Sat, */
+		case 0x2c746153: ttm->tm_wday = 6; break;
+		default: return -2;
+	}
+
+	if (*(ptime++)!=' ') return -3;
+
+
+	if (char2int(ptime,&ttm->tm_mday) || ttm->tm_mday > 31) return -4;
+	ptime+=2;
+
+	if (*(ptime++) != ' ') return -5;
+
+	uval = READ(ptime);
+	ptime+=4;
+	switch (uval) {
+		/* Jan, */
+		case 0x206e614a: ttm->tm_mon = 0; break;
+		/* Feb, */
+		case 0x20626546: ttm->tm_mon = 1; break;
+		/* Mar, */
+		case 0x2072614d: ttm->tm_mon = 2; break;
+		/* Apr, */
+		case 0x20727041: ttm->tm_mon = 3; break;
+		/* May, */
+		case 0x2079614d: ttm->tm_mon = 4; break;
+		/* Jun, */
+		case 0x206e754a: ttm->tm_mon = 5; break;
+		/* Jul, */
+		case 0x206c754a: ttm->tm_mon = 6; break;
+		/* Aug, */
+		case 0x20677541: ttm->tm_mon = 7; break;
+		/* Sep, */
+		case 0x20706553: ttm->tm_mon = 8; break;
+		/* Oct, */
+		case 0x2074634f: ttm->tm_mon = 9; break;
+		/* Nov, */
+		case 0x20766f4e: ttm->tm_mon = 10; break;
+		/* Dec, */
+		case 0x20636544: ttm->tm_mon = 11; break;
+		default: return -6;
+	}
+
+	if (char2int(ptime,&ires)) return -7;
+	ptime+=2;
+	if (char2int(ptime,&ttm->tm_year)) return -8;
+	ptime+=2;
+	ttm->tm_year+=(ires-19)*100;
+
+	if (*(ptime++) != ' ') return -9;
+
+	if (char2int(ptime,&ttm->tm_hour) || ttm->tm_hour > 23) return -10;
+	ptime+=2;
+	if (*(ptime++) != ':') return -11;
+
+	if (char2int(ptime,&ttm->tm_min) || ttm->tm_min > 59) return -12;
+	ptime+=2;
+	if (*(ptime++) != ':') return -13;
+
+	if (char2int(ptime,&ttm->tm_sec) || ttm->tm_sec > 59) return -14;
+	ptime+=2;
+
+	/* " GMT" */
+	if (memcmp(ptime," GMT", strlen(" GMT"))) return -15;
+
+	return 0;
+}
+
+char* parse_date(char *buffer, char *end, struct date_body *db)
+{
+	char *p;
+	int i1;
+
+	db->error=PARSE_ERROR;
+	p = buffer;
+
+	/* check whether enough characters are available */
+	for (i1 = 0; i1 < RFC1123DATELENGTH || p[i1] == '\n' || p + i1 >= end;i1++);
+	if (i1 < RFC1123DATELENGTH)
+		goto error;
+
+	if (rfc1123totm(buffer,&db->date))
+		goto error;
+
+	p+=RFC1123DATELENGTH;
+
+	p=eat_lws_end(p, end);
+	/*check if the header ends here*/
+	if (p>=end) {
+		LOG(L_ERR, "ERROR: parse_date: strange EoHF\n");
+		goto error;
+	}
+	if (*p=='\r' && p+1<end && *(p+1)=='\n') {
+		db->error=PARSE_OK;
+		return p+2;
+	}
+	if (*p=='\n') {
+		db->error=PARSE_OK;
+		return p+1;
+	}
+	LOG(L_ERR, "ERROR: Date EoL expected\n");
+error:
+	LOG(L_ERR,"ERROR: parse_date: parse error\n");
+	return p;
+}
+
+
+void free_date(struct date_body *db)
+{
+	pkg_free(db);
+}

parser/parse_date.h

@@ -0,0 +1,58 @@
+/*
+ * $Id$ 
+ *
+ * Copyright (c) 2007 iptelorg GmbH
+ *
+ * This file is part of ser, a free SIP server.
+ *
+ * ser 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
+ *
+ * For a license to use the ser software under conditions
+ * other than those described here, or to purchase support for this
+ * software, please contact iptel.org by e-mail at the following addresses:
+ *    info@iptel.org
+ *
+ * ser 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
+ */
+
+
+#ifndef PARSE_DATE
+#define PARSE_DATE
+
+#include <time.h>
+
+#define RFC1123DATELENGTH	29
+
+struct date_body{
+	int error;  /* Error code */
+	struct tm date;
+};
+
+
+/* casting macro for accessing DATE body */
+#define get_date(p_msg) ((struct date_body*)(p_msg)->date->parsed)
+
+
+/*
+ * Parse Date header field
+ */
+char* parse_date(char *buf, char *end, struct date_body *db);
+
+
+/*
+ * Free all associated memory
+ */
+void free_date(struct date_body *db);
+
+
+#endif