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Diffstat (limited to 'hesiod')
-rw-r--r--hesiod/hesiod.c195
1 files changed, 100 insertions, 95 deletions
diff --git a/hesiod/hesiod.c b/hesiod/hesiod.c
index 46ae9a9..ffae611 100644
--- a/hesiod/hesiod.c
+++ b/hesiod/hesiod.c
@@ -58,47 +58,48 @@ static const char rcsid[] = "$Id$";
/* A few operating systems don't define these. */
#ifndef C_HS
-#define C_HS 4
+# define C_HS 4
#endif
#ifndef T_TXT
-#define T_TXT 16
+# define T_TXT 16
#endif
-static int read_config_file(struct hesiod_p *ctx, const char *filename);
-static char **get_txt_records(struct hesiod_p *ctx, int class,
- const char *name);
+static int read_config_file (struct hesiod_p *ctx, const char *filename);
+static char **get_txt_records (struct hesiod_p *ctx, int class,
+ const char *name);
#ifdef _LIBC
# define cistrcmp(s1, s2) strcasecmp (s1, s2)
#else
-static int cistrcmp(const char *s1, const char *s2);
+static int cistrcmp (const char *s1, const char *s2);
#endif
/* This function is called to initialize a hesiod_p. */
-int hesiod_init(void **context)
+int
+hesiod_init (void **context)
{
struct hesiod_p *ctx;
const char *p, *configname;
- ctx = malloc(sizeof(struct hesiod_p));
+ ctx = malloc (sizeof (struct hesiod_p));
if (ctx)
{
*context = ctx;
- configname = __secure_getenv("HESIOD_CONFIG");
+ configname = __secure_getenv ("HESIOD_CONFIG");
if (!configname)
configname = SYSCONFDIR "/hesiod.conf";
- if (read_config_file(ctx, configname) >= 0)
+ if (read_config_file (ctx, configname) >= 0)
{
/* The default rhs can be overridden by an environment variable. */
- p = __secure_getenv("HES_DOMAIN");
+ p = __secure_getenv ("HES_DOMAIN");
if (p)
{
if (ctx->rhs)
- free(ctx->rhs);
- ctx->rhs = malloc(strlen(p) + 2);
+ free (ctx->rhs);
+ ctx->rhs = malloc (strlen (p) + 2);
if (ctx->rhs)
{
*ctx->rhs = '.';
- strcpy(ctx->rhs + 1, (*p == '.') ? p + 1 : p);
+ strcpy (ctx->rhs + 1, (*p == '.') ? p + 1 : p);
return 0;
}
else
@@ -112,47 +113,49 @@ int hesiod_init(void **context)
__set_errno (ENOMEM);
if (ctx->lhs)
- free(ctx->lhs);
+ free (ctx->lhs);
if (ctx->rhs)
- free(ctx->rhs);
+ free (ctx->rhs);
if (ctx)
- free(ctx);
+ free (ctx);
return -1;
}
/* This function deallocates the hesiod_p. */
-void hesiod_end(void *context)
+void
+hesiod_end (void *context)
{
struct hesiod_p *ctx = (struct hesiod_p *) context;
- free(ctx->rhs);
+ free (ctx->rhs);
if (ctx->lhs)
- free(ctx->lhs);
- free(ctx);
+ free (ctx->lhs);
+ free (ctx);
}
/* This function takes a hesiod (name, type) and returns a DNS
* name which is to be resolved.
*/
-char *hesiod_to_bind(void *context, const char *name, const char *type)
+char *
+hesiod_to_bind (void *context, const char *name, const char *type)
{
struct hesiod_p *ctx = (struct hesiod_p *) context;
char bindname[MAXDNAME], *p, *endp, *ret, **rhs_list = NULL;
const char *rhs;
size_t len;
- endp = stpcpy(bindname, name);
+ endp = stpcpy (bindname, name);
/* Find the right right hand side to use, possibly truncating bindname. */
- p = strchr(bindname, '@');
+ p = strchr (bindname, '@');
if (p)
{
*p++ = 0;
- if (strchr(p, '.'))
+ if (strchr (p, '.'))
rhs = name + (p - bindname);
else
{
- rhs_list = hesiod_resolve(context, p, "rhs-extension");
+ rhs_list = hesiod_resolve (context, p, "rhs-extension");
if (rhs_list)
rhs = *rhs_list;
else
@@ -161,82 +164,85 @@ char *hesiod_to_bind(void *context, const char *name, const char *type)
return NULL;
}
}
- } else
- rhs = ctx->rhs;
+ }
+ else
+ rhs = ctx->rhs;
/* See if we have enough room. */
- len = (endp - bindname) + 1 + strlen(type);
+ len = (endp - bindname) + 1 + strlen (type);
if (ctx->lhs)
- len += strlen(ctx->lhs) + ((ctx->lhs[0] != '.') ? 1 : 0);
- len += strlen(rhs) + ((rhs[0] != '.') ? 1 : 0);
- if (len > sizeof(bindname) - 1)
+ len += strlen (ctx->lhs) + ((ctx->lhs[0] != '.') ? 1 : 0);
+ len += strlen (rhs) + ((rhs[0] != '.') ? 1 : 0);
+ if (len > sizeof (bindname) - 1)
{
if (rhs_list)
- hesiod_free_list(context, rhs_list);
+ hesiod_free_list (context, rhs_list);
__set_errno (EMSGSIZE);
return NULL;
}
/* Put together the rest of the domain. */
- endp = __stpcpy (__stpcpy (endp, "."), type);
+ endp = stpcpy (stpcpy (endp, "."), type);
if (ctx->lhs)
{
if (ctx->lhs[0] != '.')
- endp = __stpcpy (endp, ".");
- endp = __stpcpy (endp, ctx->lhs);
+ endp = stpcpy (endp, ".");
+ endp = stpcpy (endp, ctx->lhs);
}
if (rhs[0] != '.')
- endp = __stpcpy (endp, ".");
- endp = __stpcpy (endp, rhs);
+ endp = stpcpy (endp, ".");
+ endp = stpcpy (endp, rhs);
/* rhs_list is no longer needed, since we're done with rhs. */
if (rhs_list)
- hesiod_free_list(context, rhs_list);
+ hesiod_free_list (context, rhs_list);
/* Make a copy of the result and return it to the caller. */
- ret = malloc((endp - bindname) + 1);
+ ret = malloc ((endp - bindname) + 1);
if (!ret)
{
__set_errno (ENOMEM);
return NULL;
}
- strcpy(ret, bindname);
- return ret;
+ return strcpy (ret, bindname);
}
/* This is the core function. Given a hesiod name and type, it
* returns an array of strings returned by the resolver.
*/
-char **hesiod_resolve(void *context, const char *name, const char *type)
+char **
+hesiod_resolve (void *context, const char *name, const char *type)
{
struct hesiod_p *ctx = (struct hesiod_p *) context;
char *bindname, **retvec;
- bindname = hesiod_to_bind(context, name, type);
- if (!bindname)
+ bindname = hesiod_to_bind (context, name, type);
+ if (bindname == NULL)
return NULL;
retvec = get_txt_records(ctx, ctx->classes[0], bindname);
if (retvec == NULL && errno == ENOENT && ctx->classes[1])
- retvec = get_txt_records(ctx, ctx->classes[1], bindname);
+ retvec = get_txt_records (ctx, ctx->classes[1], bindname);
- free(bindname);
+ free (bindname);
return retvec;
}
-void hesiod_free_list(void *context, char **list)
+void
+hesiod_free_list (void *context, char **list)
{
char **p;
for (p = list; *p; p++)
- free(*p);
- free(list);
+ free (*p);
+ free (list);
}
/* This function parses the /etc/hesiod.conf file. Returns 0 on success,
* -1 on failure. On failure, it might leave values in ctx->lhs or
* ctx->rhs which need to be freed by the caller. */
-static int read_config_file(struct hesiod_p *ctx, const char *filename)
+static int
+read_config_file (struct hesiod_p *ctx, const char *filename)
{
char *key, *data, *p, **which;
char buf[MAXDNAME + 7];
@@ -248,16 +254,16 @@ static int read_config_file(struct hesiod_p *ctx, const char *filename)
ctx->classes[1] = C_HS;
/* Try to open the configuration file. */
- fp = fopen(filename, "r");
- if (!fp)
+ fp = fopen (filename, "r");
+ if (fp = NULL)
{
/* Use compiled in default domain names. */
- ctx->lhs = malloc(strlen(DEF_LHS) + 1);
- ctx->rhs = malloc(strlen(DEF_RHS) + 1);
+ ctx->lhs = malloc (strlen (DEF_LHS) + 1);
+ ctx->rhs = malloc (strlen (DEF_RHS) + 1);
if (ctx->lhs && ctx->rhs)
{
- strcpy(ctx->lhs, DEF_LHS);
- strcpy(ctx->rhs, DEF_RHS);
+ strcpy (ctx->lhs, DEF_LHS);
+ strcpy (ctx->rhs, DEF_RHS);
return 0;
}
else
@@ -269,49 +275,48 @@ static int read_config_file(struct hesiod_p *ctx, const char *filename)
ctx->lhs = NULL;
ctx->rhs = NULL;
- while (fgets(buf, sizeof(buf), fp) != NULL)
+ while (fgets (buf, sizeof (buf), fp) != NULL)
{
p = buf;
if (*p == '#' || *p == '\n' || *p == '\r')
continue;
- while(*p == ' ' || *p == '\t')
- p++;
+ while (*p == ' ' || *p == '\t')
+ ++p;
key = p;
while(*p != ' ' && *p != '\t' && *p != '=')
- p++;
+ ++p;
*p++ = 0;
- while(isspace(*p) || *p == '=')
- p++;
+ while (isspace (*p) || *p == '=')
+ ++p;
data = p;
- while(!isspace(*p))
- p++;
+ while (!isspace (*p))
+ ++p;
*p = 0;
- if (cistrcmp(key, "lhs") == 0 || cistrcmp(key, "rhs") == 0)
+ if (cistrcmp (key, "lhs") == 0 || cistrcmp (key, "rhs") == 0)
{
- which = (strcmp(key, "lhs") == 0) ? &ctx->lhs : &ctx->rhs;
- *which = malloc(strlen(data) + 1);
+ which = (strcmp (key, "lhs") == 0) ? &ctx->lhs : &ctx->rhs;
+ *which = strdup (data);
if (!*which)
{
__set_errno (ENOMEM);
return -1;
}
- strcpy(*which, data);
}
- else if (cistrcmp(key, "classes") == 0)
+ else if (cistrcmp (key, "classes") == 0)
{
n = 0;
while (*data && n < 2)
{
p = data;
while (*p && *p != ',')
- p++;
+ ++p;
if (*p)
*p++ = 0;
- if (cistrcmp(data, "IN") == 0)
+ if (cistrcmp (data, "IN") == 0)
ctx->classes[n++] = C_IN;
- else if (cistrcmp(data, "HS") == 0)
+ else if (cistrcmp (data, "HS") == 0)
ctx->classes[n++] = C_HS;
data = p;
}
@@ -319,7 +324,7 @@ static int read_config_file(struct hesiod_p *ctx, const char *filename)
ctx->classes[n++] = 0;
}
}
- fclose(fp);
+ fclose (fp);
if (!ctx->rhs || ctx->classes[0] == 0 || ctx->classes[0] == ctx->classes[1])
{
@@ -333,8 +338,8 @@ static int read_config_file(struct hesiod_p *ctx, const char *filename)
/* Given a DNS class and a DNS name, do a lookup for TXT records, and
* return a list of them.
*/
-static char **get_txt_records(struct hesiod_p *ctx, int qclass,
- const char *name)
+static char **
+get_txt_records (struct hesiod_p *ctx, int qclass, const char *name)
{
HEADER *hp;
unsigned char qbuf[PACKETSZ], abuf[MAX_HESRESP], *p, *eom, *eor;
@@ -342,17 +347,17 @@ static char **get_txt_records(struct hesiod_p *ctx, int qclass,
int ancount, qdcount, i, j, n, skip, type, class, len;
/* Make sure the resolver is initialized. */
- if ((_res.options & RES_INIT) == 0 && res_init() == -1)
+ if ((_res.options & RES_INIT) == 0 && res_init () == -1)
return NULL;
/* Construct the query. */
- n = res_mkquery(QUERY, name, qclass, T_TXT, NULL, 0,
- NULL, qbuf, PACKETSZ);
+ n = res_mkquery (QUERY, name, qclass, T_TXT, NULL, 0,
+ NULL, qbuf, PACKETSZ);
if (n < 0)
return NULL;
/* Send the query. */
- n = res_send(qbuf, n, abuf, MAX_HESRESP);
+ n = res_send (qbuf, n, abuf, MAX_HESRESP);
if (n < 0)
{
__set_errno (ECONNREFUSED);
@@ -361,15 +366,15 @@ static char **get_txt_records(struct hesiod_p *ctx, int qclass,
/* Parse the header of the result. */
hp = (HEADER *) abuf;
- ancount = ntohs(hp->ancount);
- qdcount = ntohs(hp->qdcount);
- p = abuf + sizeof(HEADER);
+ ancount = ntohs (hp->ancount);
+ qdcount = ntohs (hp->qdcount);
+ p = abuf + sizeof (HEADER);
eom = abuf + n;
/* Skip questions, trying to get to the answer section which follows. */
- for (i = 0; i < qdcount; i++)
+ for (i = 0; i < qdcount; ++i)
{
- skip = dn_skipname(p, eom);
+ skip = dn_skipname (p, eom);
if (skip < 0 || p + skip + QFIXEDSZ > eom)
{
__set_errno (EMSGSIZE);
@@ -379,8 +384,8 @@ static char **get_txt_records(struct hesiod_p *ctx, int qclass,
}
/* Allocate space for the text record answers. */
- list = malloc((ancount + 1) * sizeof(char *));
- if (!list)
+ list = malloc ((ancount + 1) * sizeof(char *));
+ if (list == NULL)
{
__set_errno (ENOMEM);
return NULL;
@@ -391,7 +396,7 @@ static char **get_txt_records(struct hesiod_p *ctx, int qclass,
for (i = 0; i < ancount; i++)
{
/* Parse the header of this answer. */
- skip = dn_skipname(p, eom);
+ skip = dn_skipname (p, eom);
if (skip < 0 || p + skip + 10 > eom)
break;
type = p[skip + 0] << 8 | p[skip + 1];
@@ -412,7 +417,7 @@ static char **get_txt_records(struct hesiod_p *ctx, int qclass,
}
/* Allocate space for this answer. */
- list[j] = malloc(len);
+ list[j] = malloc (len);
if (!list[j])
{
__set_errno (ENOMEM);
@@ -430,9 +435,8 @@ static char **get_txt_records(struct hesiod_p *ctx, int qclass,
__set_errno (EMSGSIZE);
break;
}
- memcpy(dst, p, n);
+ dst = mempcpy (dst, p, n);
p += n;
- dst += n;
}
if (p < eor)
{
@@ -446,15 +450,15 @@ static char **get_txt_records(struct hesiod_p *ctx, int qclass,
if (i < ancount)
{
for (i = 0; i < j; i++)
- free(list[i]);
- free(list);
+ free (list[i]);
+ free (list);
return NULL;
}
if (j == 0)
{
__set_errno (ENOENT);
- free(list);
+ free (list);
return NULL;
}
@@ -463,7 +467,8 @@ static char **get_txt_records(struct hesiod_p *ctx, int qclass,
}
#ifndef _LIBC
-static int cistrcmp(const char *s1, const char *s2)
+static int
+cistrcmp (const char *s1, const char *s2)
{
while (*s1 && tolower(*s1) == tolower(*s2))
{
generated by cgit v1.1 at 2024-11-21 19:43:32 +0000