Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/iscsictl/parse.y	Lines:	0	244	0.0 %
Date:	2017-11-13	Branches:	0	189	0.0 %


/*	$OpenBSD: parse.y,v 1.10 2017/01/05 13:53:09 krw Exp $ */

/*
 * Copyright (c) 2010 David Gwynne <dlg@openbsd.org>
 * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
 * Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
 * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
 * Copyright (c) 2001 Markus Friedl.  All rights reserved.
 * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
 * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

%{
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <event.h>
#include <limits.h>
#include <netdb.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include <scsi/iscsi.h>
#include "iscsid.h"
#include "iscsictl.h"

TAILQ_HEAD(files, file)		 files = TAILQ_HEAD_INITIALIZER(files);
static struct file {
	TAILQ_ENTRY(file)	 entry;
	FILE			*stream;
	char			*name;
	int			 lineno;
	int			 errors;
} *file, *topfile;
struct file	*pushfile(const char *, int);
int		 popfile(void);
int		 yyparse(void);
int		 yylex(void);
int		 yyerror(const char *, ...)
    __attribute__((__format__ (printf, 1, 2)))
    __attribute__((__nonnull__ (1)));
int		 kw_cmp(const void *, const void *);
int		 lookup(char *);
int		 lgetc(int);
int		 lungetc(int);
int		 findeol(void);

void		 clear_config(struct iscsi_config *);

TAILQ_HEAD(symhead, sym)	 symhead = TAILQ_HEAD_INITIALIZER(symhead);
struct sym {
	TAILQ_ENTRY(sym)	 entry;
	int			 used;
	int			 persist;
	char			*nam;
	char			*val;
};
int		 symset(const char *, const char *, int);
char		*symget(const char *);

static int			 errors;
static struct iscsi_config	*conf;
static struct session_config	*session;

struct addrinfo_opts {
	int	af;
	char	*port;
} addrinfo_opts;

typedef struct {
	union {
		int			 i;
		int64_t			 number;
		char			*string;
		struct addrinfo_opts	 addrinfo_opts;
		struct addrinfo		*addrinfo;
	} v;
	int lineno;
} YYSTYPE;

%}

%token  TARGET TARGETNAME TARGETADDR
%token	INITIATORNAME INITIATORADDR ISID
%token	ENABLED DISABLED NORMAL DISCOVERY
%token  ADDRESS INET INET6 PORT
%token	INCLUDE
%token	ERROR
%token	<v.string>		STRING
%token	<v.number>		NUMBER
%type	<v.i>			af state type
%type	<v.string>		port
%type	<v.addrinfo>		addrinfo
%type	<v.addrinfo_opts>	addrinfo_opts addrinfo_opts_l addrinfo_opt
%type	<v.string>		string

%%

grammar		: /* empty */
		| grammar '\n'
		| grammar include '\n'
		| grammar varset '\n'
		| grammar initiator '\n'
		| grammar target '\n'
		| grammar error '\n'		{ file->errors++; }
		;

include		: INCLUDE STRING		{
			struct file	*nfile;

			if ((nfile = pushfile($2, 1)) == NULL) {
				yyerror("failed to include file %s", $2);
				free($2);
				YYERROR;
			}
			free($2);

			file = nfile;
			lungetc('\n');
		}
		;

string		: string STRING	{
			if (asprintf(&$$, "%s %s", $1, $2) == -1) {
				free($1);
				free($2);
				yyerror("string: asprintf");
				YYERROR;
			}
			free($1);
			free($2);
		}
		| STRING
		;

varset		: STRING '=' string		{
			char *s = $1;
			while (*s++) {
				if (isspace((unsigned char)*s)) {
					yyerror("macro name cannot contain "
					    "whitespace");
					YYERROR;
				}
			}
			if (symset($1, $3, 0) == -1)
				err(1, "cannot store variable");
			free($1);
			free($3);
		}
		;

optnl		: '\n' optnl
		|
		;

nl		: '\n' optnl		/* one or more newlines */
		;

initiator	: ISID STRING NUMBER NUMBER {
			u_int32_t mask1, mask2;

			if (!strcasecmp($2, "oui")) {
				conf->initiator.isid_base = ISCSI_ISID_OUI;
				mask1 = 0x3fffff00;
				mask2 = 0x000000ff;
			} else if (!strcasecmp($2, "en")) {
				conf->initiator.isid_base = ISCSI_ISID_EN;
				mask1 = 0x00ffffff;
				mask2 = 0;
			} else if (!strcasecmp($2, "rand")) {
				conf->initiator.isid_base = ISCSI_ISID_RAND;
				mask1 = 0x00ffffff;
				mask2 = 0;
			} else {
				yyerror("isid type %s unknown", $2);
				free($2);
				YYERROR;
			}
			free($2);
			conf->initiator.isid_base |= $3 & mask1;
			conf->initiator.isid_base |= ($4 >> 16) & mask2;
			conf->initiator.isid_qual = $4;
		}
		;

target		: TARGET STRING {
			struct session_ctlcfg *scelm;

			scelm = calloc(1, sizeof(*scelm));
			session = &scelm->session;
			if (strlcpy(session->SessionName, $2,
			    sizeof(session->SessionName)) >=
			    sizeof(session->SessionName)) {
				yyerror("target name \"%s\" too long", $2);
				free($2);
				free(scelm);
				YYERROR;
			}
			free($2);
			SIMPLEQ_INSERT_TAIL(&conf->sessions, scelm, entry);
		} '{' optnl targetopts_l '}'
		;

targetopts_l	: targetopts_l targetoptsl nl
		| targetoptsl optnl
		;

targetoptsl	: state			{ session->disabled = $1; }
		| type			{ session->SessionType = $1; }
		| TARGETNAME STRING	{ session->TargetName = $2; }
		| INITIATORNAME STRING	{ session->InitiatorName = $2; }
		| TARGETADDR addrinfo	{
			bcopy($2->ai_addr, &session->connection.TargetAddr,
			    $2->ai_addr->sa_len);
			freeaddrinfo($2);
		}
		| INITIATORADDR addrinfo {
			((struct sockaddr_in *)$2->ai_addr)->sin_port = 0;
			bcopy($2->ai_addr, &session->connection.LocalAddr,
			    $2->ai_addr->sa_len);
			freeaddrinfo($2);
		}
		;

addrinfo	: STRING addrinfo_opts {
			struct addrinfo hints;
			char *hostname;
			int error;

			$$ = NULL;

			if ($2.port == NULL) {
				if (($2.port = strdup("iscsi")) == NULL) {
					free($1);
					yyerror("port strdup");
					YYERROR;
				}
			}

			memset(&hints, 0, sizeof(hints));
			hints.ai_family = $2.af;
			hints.ai_socktype = SOCK_STREAM;
			hints.ai_protocol = IPPROTO_TCP;

			if (strcmp($1, "*") == 0) {
				hostname = NULL;
				hints.ai_flags = AI_PASSIVE;
			} else
				hostname = $1;

			error = getaddrinfo(hostname, $2.port, &hints, &$$);
			if (error) {
				yyerror("%s (%s %s)", gai_strerror(error),
				    $1, $2.port);
				free($1);
				free($2.port);
				YYERROR;
			}

			free($1);
			free($2.port);
		}
		;

addrinfo_opts	: {
			addrinfo_opts.port = NULL;
			addrinfo_opts.af = PF_UNSPEC;
		}
			addrinfo_opts_l { $$ = addrinfo_opts; }
		| /* empty */ {
			addrinfo_opts.port = NULL;
			addrinfo_opts.af = PF_UNSPEC;
			$$ = addrinfo_opts;
		}
		;

addrinfo_opts_l	: addrinfo_opts_l addrinfo_opt
		| addrinfo_opt
		;

addrinfo_opt	: port {
			if (addrinfo_opts.port != NULL) {
				yyerror("port cannot be redefined");
				YYERROR;
			}
			addrinfo_opts.port = $1;
		}
		| af {
			if (addrinfo_opts.af != PF_UNSPEC) {
				yyerror("address family cannot be redefined");
				YYERROR;
			}
			addrinfo_opts.af = $1;
		}
		;

port		: PORT STRING			{ $$ = $2; }
		;

af		: INET				{ $$ = PF_INET; }
		| INET6				{ $$ = PF_INET6; }
		;

state		: ENABLED			{ $$ = 0; }
		| DISABLED			{ $$ = 1; }
		;

type		: NORMAL			{ $$ = SESSION_TYPE_NORMAL; }
		| DISCOVERY			{ $$ = SESSION_TYPE_DISCOVERY; }
		;


%%

struct keywords {
	const char	*k_name;
	int		 k_val;
};

int
yyerror(const char *fmt, ...)
{
	va_list	ap;

	file->errors++;
	va_start(ap, fmt);
	fprintf(stderr, "%s:%d: ", file->name, yylval.lineno);
	vfprintf(stderr, fmt, ap);
	fprintf(stderr, "\n");
	va_end(ap);
	return (0);
}

int
kw_cmp(const void *k, const void *e)
{
	return (strcmp(k, ((const struct keywords *)e)->k_name));
}

int
lookup(char *s)
{
	/* this has to be sorted always */
	static const struct keywords keywords[] = {
		{"address",		ADDRESS},
		{"disabled",		DISABLED},
		{"discovery",		DISCOVERY},
		{"enabled",		ENABLED},
		{"include",		INCLUDE},
		{"inet",		INET},
		{"inet4",		INET},
		{"inet6",		INET6},
		{"initiatoraddr",	INITIATORADDR},
		{"initiatorname",	INITIATORNAME},
		{"isid",		ISID},
		{"normal",		NORMAL},
		{"port",		PORT},
		{"target",		TARGET},
		{"targetaddr",		TARGETADDR},
		{"targetname",		TARGETNAME}
	};
	const struct keywords	*p;

	p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
	    sizeof(keywords[0]), kw_cmp);

	if (p)
		return (p->k_val);
	else
		return (STRING);
}

#define MAXPUSHBACK	128

u_char	*parsebuf;
int	 parseindex;
u_char	 pushback_buffer[MAXPUSHBACK];
int	 pushback_index;

int
lgetc(int quotec)
{
	int		c, next;

	if (parsebuf) {
		/* Read character from the parsebuffer instead of input. */
		if (parseindex >= 0) {
			c = parsebuf[parseindex++];
			if (c != '\0')
				return (c);
			parsebuf = NULL;
		} else
			parseindex++;
	}

	if (pushback_index)
		return (pushback_buffer[--pushback_index]);

	if (quotec) {
		if ((c = getc(file->stream)) == EOF) {
			yyerror("reached end of file while parsing "
			    "quoted string");
			if (file == topfile || popfile() == EOF)
				return (EOF);
			return (quotec);
		}
		return (c);
	}

	while ((c = getc(file->stream)) == '\\') {
		next = getc(file->stream);
		if (next != '\n') {
			c = next;
			break;
		}
		yylval.lineno = file->lineno;
		file->lineno++;
	}

	while (c == EOF) {
		if (file == topfile || popfile() == EOF)
			return (EOF);
		c = getc(file->stream);
	}
	return (c);
}

int
lungetc(int c)
{
	if (c == EOF)
		return (EOF);
	if (parsebuf) {
		parseindex--;
		if (parseindex >= 0)
			return (c);
	}
	if (pushback_index < MAXPUSHBACK-1)
		return (pushback_buffer[pushback_index++] = c);
	else
		return (EOF);
}

int
findeol(void)
{
	int	c;

	parsebuf = NULL;

	/* skip to either EOF or the first real EOL */
	while (1) {
		if (pushback_index)
			c = pushback_buffer[--pushback_index];
		else
			c = lgetc(0);
		if (c == '\n') {
			file->lineno++;
			break;
		}
		if (c == EOF)
			break;
	}
	return (ERROR);
}

int
yylex(void)
{
	u_char	 buf[8096];
	u_char	*p, *val;
	int	 quotec, next, c;
	int	 token;

top:
	p = buf;
	while ((c = lgetc(0)) == ' ' || c == '\t')
		; /* nothing */

	yylval.lineno = file->lineno;
	if (c == '#')
		while ((c = lgetc(0)) != '\n' && c != EOF)
			; /* nothing */
	if (c == '$' && parsebuf == NULL) {
		while (1) {
			if ((c = lgetc(0)) == EOF)
				return (0);

			if (p + 1 >= buf + sizeof(buf) - 1) {
				yyerror("string too long");
				return (findeol());
			}
			if (isalnum(c) || c == '_') {
				*p++ = c;
				continue;
			}
			*p = '\0';
			lungetc(c);
			break;
		}
		val = symget(buf);
		if (val == NULL) {
			yyerror("macro '%s' not defined", buf);
			return (findeol());
		}
		parsebuf = val;
		parseindex = 0;
		goto top;
	}

	switch (c) {
	case '\'':
	case '"':
		quotec = c;
		while (1) {
			if ((c = lgetc(quotec)) == EOF)
				return (0);
			if (c == '\n') {
				file->lineno++;
				continue;
			} else if (c == '\\') {
				if ((next = lgetc(quotec)) == EOF)
					return (0);
				if (next == quotec || c == ' ' || c == '\t')
					c = next;
				else if (next == '\n') {
					file->lineno++;
					continue;
				} else
					lungetc(next);
			} else if (c == quotec) {
				*p = '\0';
				break;
			} else if (c == '\0') {
				yyerror("syntax error");
				return (findeol());
			}
			if (p + 1 >= buf + sizeof(buf) - 1) {
				yyerror("string too long");
				return (findeol());
			}
			*p++ = c;
		}
		yylval.v.string = strdup(buf);
		if (yylval.v.string == NULL)
			err(1, "yylex: strdup");
		return (STRING);
	}

#define allowed_to_end_number(x) \
	(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')

	if (c == '-' || isdigit(c)) {
		do {
			*p++ = c;
			if ((unsigned)(p-buf) >= sizeof(buf)) {
				yyerror("string too long");
				return (findeol());
			}
		} while ((c = lgetc(0)) != EOF && isdigit(c));
		lungetc(c);
		if (p == buf + 1 && buf[0] == '-')
			goto nodigits;
		if (c == EOF || allowed_to_end_number(c)) {
			const char *errstr = NULL;

			*p = '\0';
			yylval.v.number = strtonum(buf, LLONG_MIN,
			    LLONG_MAX, &errstr);
			if (errstr) {
				yyerror("\"%s\" invalid number: %s",
				    buf, errstr);
				return (findeol());
			}
			return (NUMBER);
		} else {
nodigits:
			while (p > buf + 1)
				lungetc(*--p);
			c = *--p;
			if (c == '-')
				return (c);
		}
	}

#define allowed_in_string(x) \
	(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
	x != '{' && x != '}' && \
	x != '!' && x != '=' && x != '#' && \
	x != ','))

	if (isalnum(c) || c == ':' || c == '_') {
		do {
			*p++ = c;
			if ((unsigned)(p-buf) >= sizeof(buf)) {
				yyerror("string too long");
				return (findeol());
			}
		} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
		lungetc(c);
		*p = '\0';
		if ((token = lookup(buf)) == STRING)
			if ((yylval.v.string = strdup(buf)) == NULL)
				err(1, "yylex: strdup");
		return (token);
	}
	if (c == '\n') {
		yylval.lineno = file->lineno;
		file->lineno++;
	}
	if (c == EOF)
		return (0);
	return (c);
}

struct file *
pushfile(const char *name, int secret)
{
	struct file	*nfile;

	if ((nfile = calloc(1, sizeof(struct file))) == NULL) {
		warn("malloc");
		return (NULL);
	}
	if ((nfile->name = strdup(name)) == NULL) {
		warn("malloc");
		free(nfile);
		return (NULL);
	}
	if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
		warn("%s", nfile->name);
		free(nfile->name);
		free(nfile);
		return (NULL);
	}
	nfile->lineno = 1;
	TAILQ_INSERT_TAIL(&files, nfile, entry);
	return (nfile);
}

int
popfile(void)
{
	struct file	*prev;

	if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
		prev->errors += file->errors;

	TAILQ_REMOVE(&files, file, entry);
	fclose(file->stream);
	free(file->name);
	free(file);
	file = prev;
	return (file ? 0 : EOF);
}

struct iscsi_config *
parse_config(char *filename)
{
	struct sym	*sym, *next;

	file = pushfile(filename, 1);
	if (file == NULL)
		return (NULL);
	topfile = file;

	conf = calloc(1, sizeof(struct iscsi_config));
	if (conf == NULL)
		return (NULL);
	SIMPLEQ_INIT(&conf->sessions);

	yyparse();
	errors = file->errors;
	popfile();

	/* Free macros and check which have not been used. */
	TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
		if (!sym->persist) {
			free(sym->nam);
			free(sym->val);
			TAILQ_REMOVE(&symhead, sym, entry);
			free(sym);
		}
	}

	if (errors) {
		clear_config(conf);
		return (NULL);
	}

	return (conf);
}

int
cmdline_symset(char *s)
{
	char	*sym, *val;
	int	ret;
	size_t	len;

	if ((val = strrchr(s, '=')) == NULL)
		return (-1);

	len = strlen(s) - strlen(val) + 1;
	if ((sym = malloc(len)) == NULL)
		errx(1, "cmdline_symset: malloc");

	strlcpy(sym, s, len);

	ret = symset(sym, val + 1, 1);
	free(sym);

	return (ret);
}

char *
symget(const char *nam)
{
	struct sym	*sym;

	TAILQ_FOREACH(sym, &symhead, entry) {
		if (strcmp(nam, sym->nam) == 0) {
			sym->used = 1;
			return (sym->val);
		}
	}
	return (NULL);
}

int
symset(const char *nam, const char *val, int persist)
{
	struct sym	*sym;

	TAILQ_FOREACH(sym, &symhead, entry) {
		if (strcmp(nam, sym->nam) == 0)
			break;
	}

	if (sym != NULL) {
		if (sym->persist == 1)
			return (0);
		else {
			free(sym->nam);
			free(sym->val);
			TAILQ_REMOVE(&symhead, sym, entry);
			free(sym);
		}
	}
	if ((sym = calloc(1, sizeof(*sym))) == NULL)
		return (-1);

	sym->nam = strdup(nam);
	if (sym->nam == NULL) {
		free(sym);
		return (-1);
	}
	sym->val = strdup(val);
	if (sym->val == NULL) {
		free(sym->nam);
		free(sym);
		return (-1);
	}
	sym->used = 0;
	sym->persist = persist;
	TAILQ_INSERT_TAIL(&symhead, sym, entry);
	return (0);
}

void
clear_config(struct iscsi_config *c)
{
	struct session_ctlcfg *s;

	while ((s = SIMPLEQ_FIRST(&c->sessions))) {
		SIMPLEQ_REMOVE_HEAD(&c->sessions, entry);
		free(s->session.TargetName);
		free(s->session.InitiatorName);
		free(s);
	}

	free(c);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: parse.y,v 1.10 2017/01/05 13:53:09 krw Exp $ */
2
3			/*
4			* Copyright (c) 2010 David Gwynne <dlg@openbsd.org>
5			* Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
6			* Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
7			* Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
8			* Copyright (c) 2001 Markus Friedl. All rights reserved.
9			* Copyright (c) 2001 Daniel Hartmeier. All rights reserved.
10			* Copyright (c) 2001 Theo de Raadt. All rights reserved.
11			*
12			* Permission to use, copy, modify, and distribute this software for any
13			* purpose with or without fee is hereby granted, provided that the above
14			* copyright notice and this permission notice appear in all copies.
15			*
16			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
17			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
18			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
19			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
20			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
21			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
22			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23			*/
24
25			%{
26			#include <sys/types.h>
27			#include <sys/queue.h>
28			#include <sys/socket.h>
29			#include <sys/stat.h>
30			#include <sys/uio.h>
31			#include <netinet/in.h>
32			#include <arpa/inet.h>
33			#include <ctype.h>
34			#include <err.h>
35			#include <errno.h>
36			#include <event.h>
37			#include <limits.h>
38			#include <netdb.h>
39			#include <stdarg.h>
40			#include <stdio.h>
41			#include <string.h>
42			#include <unistd.h>
43
44			#include <scsi/iscsi.h>
45			#include "iscsid.h"
46			#include "iscsictl.h"
47
48			TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files);
49			static struct file {
50			TAILQ_ENTRY(file) entry;
51			FILE *stream;
52			char *name;
53			int lineno;
54			int errors;
55			} file, topfile;
56			struct file pushfile(const char , int);
57			int popfile(void);
58			int yyparse(void);
59			int yylex(void);
60			int yyerror(const char *, ...)
61			__attribute__((__format__ (printf, 1, 2)))
62			__attribute__((__nonnull__ (1)));
63			int kw_cmp(const void , const void );
64			int lookup(char *);
65			int lgetc(int);
66			int lungetc(int);
67			int findeol(void);
68
69			void clear_config(struct iscsi_config *);
70
71			TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead);
72			struct sym {
73			TAILQ_ENTRY(sym) entry;
74			int used;
75			int persist;
76			char *nam;
77			char *val;
78			};
79			int symset(const char , const char , int);
80			char symget(const char );
81
82			static int errors;
83			static struct iscsi_config *conf;
84			static struct session_config *session;
85
86			struct addrinfo_opts {
87			int af;
88			char *port;
89			} addrinfo_opts;
90
91			typedef struct {
92			union {
93			int i;
94			int64_t number;
95			char *string;
96			struct addrinfo_opts addrinfo_opts;
97			struct addrinfo *addrinfo;
98			} v;
99			int lineno;
100			} YYSTYPE;
101
102			%}
103
104			%token TARGET TARGETNAME TARGETADDR
105			%token INITIATORNAME INITIATORADDR ISID
106			%token ENABLED DISABLED NORMAL DISCOVERY
107			%token ADDRESS INET INET6 PORT
108			%token INCLUDE
109			%token ERROR
110			%token <v.string> STRING
111			%token <v.number> NUMBER
112			%type <v.i> af state type
113			%type <v.string> port
114			%type <v.addrinfo> addrinfo
115			%type <v.addrinfo_opts> addrinfo_opts addrinfo_opts_l addrinfo_opt
116			%type <v.string> string
117
118			%%
119
120			grammar : /* empty */
121			\| grammar '\n'
122			\| grammar include '\n'
123			\| grammar varset '\n'
124			\| grammar initiator '\n'
125			\| grammar target '\n'
126			\| grammar error '\n' { file->errors++; }
127			;
128
129			include : INCLUDE STRING {
130			struct file *nfile;
131
132			if ((nfile = pushfile($2, 1)) == NULL) {
133			yyerror("failed to include file %s", $2);
134			free($2);
135			YYERROR;
136			}
137			free($2);
138
139			file = nfile;
140			lungetc('\n');
141			}
142			;
143
144			string : string STRING {
145			if (asprintf(&$$, "%s %s", $1, $2) == -1) {
146			free($1);
147			free($2);
148			yyerror("string: asprintf");
149			YYERROR;
150			}
151			free($1);
152			free($2);
153			}
154			\| STRING
155			;
156
157			varset : STRING '=' string {
158			char *s = $1;
159			while (*s++) {
160			if (isspace((unsigned char)*s)) {
161			yyerror("macro name cannot contain "
162			"whitespace");
163			YYERROR;
164			}
165			}
166			if (symset($1, $3, 0) == -1)
167			err(1, "cannot store variable");
168			free($1);
169			free($3);
170			}
171			;
172
173			optnl : '\n' optnl
174			\|
175			;
176
177			nl : '\n' optnl /* one or more newlines */
178			;
179
180			initiator : ISID STRING NUMBER NUMBER {
181			u_int32_t mask1, mask2;
182
183			if (!strcasecmp($2, "oui")) {
184			conf->initiator.isid_base = ISCSI_ISID_OUI;
185			mask1 = 0x3fffff00;
186			mask2 = 0x000000ff;
187			} else if (!strcasecmp($2, "en")) {
188			conf->initiator.isid_base = ISCSI_ISID_EN;
189			mask1 = 0x00ffffff;
190			mask2 = 0;
191			} else if (!strcasecmp($2, "rand")) {
192			conf->initiator.isid_base = ISCSI_ISID_RAND;
193			mask1 = 0x00ffffff;
194			mask2 = 0;
195			} else {
196			yyerror("isid type %s unknown", $2);
197			free($2);
198			YYERROR;
199			}
200			free($2);
201			conf->initiator.isid_base \|= $3 & mask1;
202			conf->initiator.isid_base \|= ($4 >> 16) & mask2;
203			conf->initiator.isid_qual = $4;
204			}
205			;
206
207			target : TARGET STRING {
208			struct session_ctlcfg *scelm;
209
210			scelm = calloc(1, sizeof(*scelm));
211			session = &scelm->session;
212			if (strlcpy(session->SessionName, $2,
213			sizeof(session->SessionName)) >=
214			sizeof(session->SessionName)) {
215			yyerror("target name \"%s\" too long", $2);
216			free($2);
217			free(scelm);
218			YYERROR;
219			}
220			free($2);
221			SIMPLEQ_INSERT_TAIL(&conf->sessions, scelm, entry);
222			} '{' optnl targetopts_l '}'
223			;
224
225			targetopts_l : targetopts_l targetoptsl nl
226			\| targetoptsl optnl
227			;
228
229			targetoptsl : state { session->disabled = $1; }
230			\| type { session->SessionType = $1; }
231			\| TARGETNAME STRING { session->TargetName = $2; }
232			\| INITIATORNAME STRING { session->InitiatorName = $2; }
233			\| TARGETADDR addrinfo {
234			bcopy($2->ai_addr, &session->connection.TargetAddr,
235			$2->ai_addr->sa_len);
236			freeaddrinfo($2);
237			}
238			\| INITIATORADDR addrinfo {
239			((struct sockaddr_in *)$2->ai_addr)->sin_port = 0;
240			bcopy($2->ai_addr, &session->connection.LocalAddr,
241			$2->ai_addr->sa_len);
242			freeaddrinfo($2);
243			}
244			;
245
246			addrinfo : STRING addrinfo_opts {
247			struct addrinfo hints;
248			char *hostname;
249			int error;
250
251			$$ = NULL;
252
253			if ($2.port == NULL) {
254			if (($2.port = strdup("iscsi")) == NULL) {
255			free($1);
256			yyerror("port strdup");
257			YYERROR;
258			}
259			}
260
261			memset(&hints, 0, sizeof(hints));
262			hints.ai_family = $2.af;
263			hints.ai_socktype = SOCK_STREAM;
264			hints.ai_protocol = IPPROTO_TCP;
265
266			if (strcmp($1, "*") == 0) {
267			hostname = NULL;
268			hints.ai_flags = AI_PASSIVE;
269			} else
270			hostname = $1;
271
272			error = getaddrinfo(hostname, $2.port, &hints, &$$);
273			if (error) {
274			yyerror("%s (%s %s)", gai_strerror(error),
275			$1, $2.port);
276			free($1);
277			free($2.port);
278			YYERROR;
279			}
280
281			free($1);
282			free($2.port);
283			}
284			;
285
286			addrinfo_opts : {
287			addrinfo_opts.port = NULL;
288			addrinfo_opts.af = PF_UNSPEC;
289			}
290			addrinfo_opts_l { $$ = addrinfo_opts; }
291			\| /* empty */ {
292			addrinfo_opts.port = NULL;
293			addrinfo_opts.af = PF_UNSPEC;
294			$$ = addrinfo_opts;
295			}
296			;
297
298			addrinfo_opts_l : addrinfo_opts_l addrinfo_opt
299			\| addrinfo_opt
300			;
301
302			addrinfo_opt : port {
303			if (addrinfo_opts.port != NULL) {
304			yyerror("port cannot be redefined");
305			YYERROR;
306			}
307			addrinfo_opts.port = $1;
308			}
309			\| af {
310			if (addrinfo_opts.af != PF_UNSPEC) {
311			yyerror("address family cannot be redefined");
312			YYERROR;
313			}
314			addrinfo_opts.af = $1;
315			}
316			;
317
318			port : PORT STRING { $$ = $2; }
319			;
320
321			af : INET { $$ = PF_INET; }
322			\| INET6 { $$ = PF_INET6; }
323			;
324
325			state : ENABLED { $$ = 0; }
326			\| DISABLED { $$ = 1; }
327			;
328
329			type : NORMAL { $$ = SESSION_TYPE_NORMAL; }
330			\| DISCOVERY { $$ = SESSION_TYPE_DISCOVERY; }
331			;
332
333
334			%%
335
336			struct keywords {
337			const char *k_name;
338			int k_val;
339			};
340
341			int
342			yyerror(const char *fmt, ...)
343			{
344			va_list ap;
345
346			file->errors++;
347			va_start(ap, fmt);
348			fprintf(stderr, "%s:%d: ", file->name, yylval.lineno);
349			vfprintf(stderr, fmt, ap);
350			fprintf(stderr, "\n");
351			va_end(ap);
352			return (0);
353			}
354
355			int
356			kw_cmp(const void k, const void e)
357			{
358			return (strcmp(k, ((const struct keywords *)e)->k_name));
359			}
360
361			int
362			lookup(char *s)
363			{
364			/* this has to be sorted always */
365			static const struct keywords keywords[] = {
366			{"address", ADDRESS},
367			{"disabled", DISABLED},
368			{"discovery", DISCOVERY},
369			{"enabled", ENABLED},
370			{"include", INCLUDE},
371			{"inet", INET},
372			{"inet4", INET},
373			{"inet6", INET6},
374			{"initiatoraddr", INITIATORADDR},
375			{"initiatorname", INITIATORNAME},
376			{"isid", ISID},
377			{"normal", NORMAL},
378			{"port", PORT},
379			{"target", TARGET},
380			{"targetaddr", TARGETADDR},
381			{"targetname", TARGETNAME}
382			};
383			const struct keywords *p;
384
385			p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
386			sizeof(keywords[0]), kw_cmp);
387
388			if (p)
389			return (p->k_val);
390			else
391			return (STRING);
392			}
393
394			#define MAXPUSHBACK 128
395
396			u_char *parsebuf;
397			int parseindex;
398			u_char pushback_buffer[MAXPUSHBACK];
399			int pushback_index;
400
401			int
402			lgetc(int quotec)
403			{
404			int c, next;
405
406			if (parsebuf) {
407			/* Read character from the parsebuffer instead of input. */
408			if (parseindex >= 0) {
409			c = parsebuf[parseindex++];
410			if (c != '\0')
411			return (c);
412			parsebuf = NULL;
413			} else
414			parseindex++;
415			}
416
417			if (pushback_index)
418			return (pushback_buffer[--pushback_index]);
419
420			if (quotec) {
421			if ((c = getc(file->stream)) == EOF) {
422			yyerror("reached end of file while parsing "
423			"quoted string");
424			if (file == topfile \|\| popfile() == EOF)
425			return (EOF);
426			return (quotec);
427			}
428			return (c);
429			}
430
431			while ((c = getc(file->stream)) == '\\') {
432			next = getc(file->stream);
433			if (next != '\n') {
434			c = next;
435			break;
436			}
437			yylval.lineno = file->lineno;
438			file->lineno++;
439			}
440
441			while (c == EOF) {
442			if (file == topfile \|\| popfile() == EOF)
443			return (EOF);
444			c = getc(file->stream);
445			}
446			return (c);
447			}
448
449			int
450			lungetc(int c)
451			{
452			if (c == EOF)
453			return (EOF);
454			if (parsebuf) {
455			parseindex--;
456			if (parseindex >= 0)
457			return (c);
458			}
459			if (pushback_index < MAXPUSHBACK-1)
460			return (pushback_buffer[pushback_index++] = c);
461			else
462			return (EOF);
463			}
464
465			int
466			findeol(void)
467			{
468			int c;
469
470			parsebuf = NULL;
471
472			/* skip to either EOF or the first real EOL */
473			while (1) {
474			if (pushback_index)
475			c = pushback_buffer[--pushback_index];
476			else
477			c = lgetc(0);
478			if (c == '\n') {
479			file->lineno++;
480			break;
481			}
482			if (c == EOF)
483			break;
484			}
485			return (ERROR);
486			}
487
488			int
489			yylex(void)
490			{
491			u_char buf[8096];
492			u_char p, val;
493			int quotec, next, c;
494			int token;
495
496			top:
497			p = buf;
498			while ((c = lgetc(0)) == ' ' \|\| c == '\t')
499			; /* nothing */
500
501			yylval.lineno = file->lineno;
502			if (c == '#')
503			while ((c = lgetc(0)) != '\n' && c != EOF)
504			; /* nothing */
505			if (c == '$' && parsebuf == NULL) {
506			while (1) {
507			if ((c = lgetc(0)) == EOF)
508			return (0);
509
510			if (p + 1 >= buf + sizeof(buf) - 1) {
511			yyerror("string too long");
512			return (findeol());
513			}
514			if (isalnum(c) \|\| c == '_') {
515			*p++ = c;
516			continue;
517			}
518			*p = '\0';
519			lungetc(c);
520			break;
521			}
522			val = symget(buf);
523			if (val == NULL) {
524			yyerror("macro '%s' not defined", buf);
525			return (findeol());
526			}
527			parsebuf = val;
528			parseindex = 0;
529			goto top;
530			}
531
532			switch (c) {
533			case '\'':
534			case '"':
535			quotec = c;
536			while (1) {
537			if ((c = lgetc(quotec)) == EOF)
538			return (0);
539			if (c == '\n') {
540			file->lineno++;
541			continue;
542			} else if (c == '\\') {
543			if ((next = lgetc(quotec)) == EOF)
544			return (0);
545			if (next == quotec \|\| c == ' ' \|\| c == '\t')
546			c = next;
547			else if (next == '\n') {
548			file->lineno++;
549			continue;
550			} else
551			lungetc(next);
552			} else if (c == quotec) {
553			*p = '\0';
554			break;
555			} else if (c == '\0') {
556			yyerror("syntax error");
557			return (findeol());
558			}
559			if (p + 1 >= buf + sizeof(buf) - 1) {
560			yyerror("string too long");
561			return (findeol());
562			}
563			*p++ = c;
564			}
565			yylval.v.string = strdup(buf);
566			if (yylval.v.string == NULL)
567			err(1, "yylex: strdup");
568			return (STRING);
569			}
570
571			#define allowed_to_end_number(x) \
572			(isspace(x) \|\| x == ')' \|\| x ==',' \|\| x == '/' \|\| x == '}' \|\| x == '=')
573
574			if (c == '-' \|\| isdigit(c)) {
575			do {
576			*p++ = c;
577			if ((unsigned)(p-buf) >= sizeof(buf)) {
578			yyerror("string too long");
579			return (findeol());
580			}
581			} while ((c = lgetc(0)) != EOF && isdigit(c));
582			lungetc(c);
583			if (p == buf + 1 && buf[0] == '-')
584			goto nodigits;
585			if (c == EOF \|\| allowed_to_end_number(c)) {
586			const char *errstr = NULL;
587
588			*p = '\0';
589			yylval.v.number = strtonum(buf, LLONG_MIN,
590			LLONG_MAX, &errstr);
591			if (errstr) {
592			yyerror("\"%s\" invalid number: %s",
593			buf, errstr);
594			return (findeol());
595			}
596			return (NUMBER);
597			} else {
598			nodigits:
599			while (p > buf + 1)
600			lungetc(*--p);
601			c = *--p;
602			if (c == '-')
603			return (c);
604			}
605			}
606
607			#define allowed_in_string(x) \
608			(isalnum(x) \|\| (ispunct(x) && x != '(' && x != ')' && \
609			x != '{' && x != '}' && \
610			x != '!' && x != '=' && x != '#' && \
611			x != ','))
612
613			if (isalnum(c) \|\| c == ':' \|\| c == '_') {
614			do {
615			*p++ = c;
616			if ((unsigned)(p-buf) >= sizeof(buf)) {
617			yyerror("string too long");
618			return (findeol());
619			}
620			} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
621			lungetc(c);
622			*p = '\0';
623			if ((token = lookup(buf)) == STRING)
624			if ((yylval.v.string = strdup(buf)) == NULL)
625			err(1, "yylex: strdup");
626			return (token);
627			}
628			if (c == '\n') {
629			yylval.lineno = file->lineno;
630			file->lineno++;
631			}
632			if (c == EOF)
633			return (0);
634			return (c);
635			}
636
637			struct file *
638			pushfile(const char *name, int secret)
639			{
640			struct file *nfile;
641
642			if ((nfile = calloc(1, sizeof(struct file))) == NULL) {
643			warn("malloc");
644			return (NULL);
645			}
646			if ((nfile->name = strdup(name)) == NULL) {
647			warn("malloc");
648			free(nfile);
649			return (NULL);
650			}
651			if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
652			warn("%s", nfile->name);
653			free(nfile->name);
654			free(nfile);
655			return (NULL);
656			}
657			nfile->lineno = 1;
658			TAILQ_INSERT_TAIL(&files, nfile, entry);
659			return (nfile);
660			}
661
662			int
663			popfile(void)
664			{
665			struct file *prev;
666
667			if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
668			prev->errors += file->errors;
669
670			TAILQ_REMOVE(&files, file, entry);
671			fclose(file->stream);
672			free(file->name);
673			free(file);
674			file = prev;
675			return (file ? 0 : EOF);
676			}
677
678			struct iscsi_config *
679			parse_config(char *filename)
680			{
681			struct sym sym, next;
682
683			file = pushfile(filename, 1);
684			if (file == NULL)
685			return (NULL);
686			topfile = file;
687
688			conf = calloc(1, sizeof(struct iscsi_config));
689			if (conf == NULL)
690			return (NULL);
691			SIMPLEQ_INIT(&conf->sessions);
692
693			yyparse();
694			errors = file->errors;
695			popfile();
696
697			/* Free macros and check which have not been used. */
698			TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
699			if (!sym->persist) {
700			free(sym->nam);
701			free(sym->val);
702			TAILQ_REMOVE(&symhead, sym, entry);
703			free(sym);
704			}
705			}
706
707			if (errors) {
708			clear_config(conf);
709			return (NULL);
710			}
711
712			return (conf);
713			}
714
715			int
716			cmdline_symset(char *s)
717			{
718			char sym, val;
719			int ret;
720			size_t len;
721
722			if ((val = strrchr(s, '=')) == NULL)
723			return (-1);
724
725			len = strlen(s) - strlen(val) + 1;
726			if ((sym = malloc(len)) == NULL)
727			errx(1, "cmdline_symset: malloc");
728
729			strlcpy(sym, s, len);
730
731			ret = symset(sym, val + 1, 1);
732			free(sym);
733
734			return (ret);
735			}
736
737			char *
738			symget(const char *nam)
739			{
740			struct sym *sym;
741
742			TAILQ_FOREACH(sym, &symhead, entry) {
743			if (strcmp(nam, sym->nam) == 0) {
744			sym->used = 1;
745			return (sym->val);
746			}
747			}
748			return (NULL);
749			}
750
751			int
752			symset(const char nam, const char val, int persist)
753			{
754			struct sym *sym;
755
756			TAILQ_FOREACH(sym, &symhead, entry) {
757			if (strcmp(nam, sym->nam) == 0)
758			break;
759			}
760
761			if (sym != NULL) {
762			if (sym->persist == 1)
763			return (0);
764			else {
765			free(sym->nam);
766			free(sym->val);
767			TAILQ_REMOVE(&symhead, sym, entry);
768			free(sym);
769			}
770			}
771			if ((sym = calloc(1, sizeof(*sym))) == NULL)
772			return (-1);
773
774			sym->nam = strdup(nam);
775			if (sym->nam == NULL) {
776			free(sym);
777			return (-1);
778			}
779			sym->val = strdup(val);
780			if (sym->val == NULL) {
781			free(sym->nam);
782			free(sym);
783			return (-1);
784			}
785			sym->used = 0;
786			sym->persist = persist;
787			TAILQ_INSERT_TAIL(&symhead, sym, entry);
788			return (0);
789			}
790
791			void
792			clear_config(struct iscsi_config *c)
793			{
794			struct session_ctlcfg *s;
795
796			while ((s = SIMPLEQ_FIRST(&c->sessions))) {
797			SIMPLEQ_REMOVE_HEAD(&c->sessions, entry);
798			free(s->session.TargetName);
799			free(s->session.InitiatorName);
800			free(s);
801			}
802
803			free(c);
804			}