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/*++
/* NAME
/* attr_print0 3
/* SUMMARY
/* send attributes over byte stream
/* SYNOPSIS
/* #include <attr.h>
/*
/* int attr_print0(fp, flags, type, name, ..., ATTR_TYPE_END)
/* VSTREAM fp;
/* int flags;
/* int type;
/* char *name;
/*
/* int attr_vprint0(fp, flags, ap)
/* VSTREAM fp;
/* int flags;
/* va_list ap;
/* DESCRIPTION
/* attr_print0() takes zero or more (name, value) simple attributes
/* and converts its input to a byte stream that can be recovered with
/* attr_scan0(). The stream is not flushed.
/*
/* attr_vprint0() provides an alternate interface that is convenient
/* for calling from within variadic functions.
/*
/* Attributes are sent in the requested order as specified with the
/* attr_print0() argument list. This routine satisfies the formatting
/* rules as outlined in attr_scan0(3).
/*
/* Arguments:
/* .IP fp
/* Stream to write the result to.
/* .IP flags
/* The bit-wise OR of zero or more of the following.
/* .RS
/* .IP ATTR_FLAG_MORE
/* After sending the requested attributes, leave the output stream in
/* a state that is usable for more attribute sending operations on
/* the same output attribute list.
/* By default, attr_print0() automatically appends an attribute list
/* terminator when it has sent the last requested attribute.
/* .RE
/* .IP List of attributes followed by terminator:
/* .RS
/* .IP "SEND_ATTR_INT(const char *name, int value)"
/* The arguments are an attribute name and an integer.
/* .IP "SEND_ATTR_LONG(const char *name, long value)"
/* The arguments are an attribute name and a long integer.
/* .IP "SEND_ATTR_STR(const char *name, const char *value)"
/* The arguments are an attribute name and a null-terminated
/* string.
/* .IP "SEND_ATTR_DATA(const char *name, ssize_t len, const void *value)"
/* The arguments are an attribute name, an attribute value
/* length, and an attribute value pointer.
/* .IP "SEND_ATTR_FUNC(ATTR_PRINT_CUSTOM_FN, const void *value)"
/* The arguments are a function pointer and generic data
/* pointer. The caller-specified function returns whatever the
/* specified attribute printing function returns.
/* .IP "SEND_ATTR_HASH(const HTABLE *table)"
/* .IP "SEND_ATTR_NAMEVAL(const NVTABLE *table)"
/* The content of the table is sent as a sequence of string-valued
/* attributes with names equal to the table lookup keys.
/* .IP ATTR_TYPE_END
/* This terminates the attribute list.
/* .RE
/* DIAGNOSTICS
/* The result value is 0 in case of success, VSTREAM_EOF in case
/* of trouble.
/*
/* Panic: interface violation. All system call errors are fatal.
/* SEE ALSO
/* attr_scan0(3) recover attributes from byte stream
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*
/* Wietse Venema
/* Google, Inc.
/* 111 8th Avenue
/* New York, NY 10011, USA
/*--*/
/* System library. */
#include <sys_defs.h>
#include <stdarg.h>
#include <string.h>
/* Utility library. */
#include <msg.h>
#include <mymalloc.h>
#include <vstream.h>
#include <htable.h>
#include <attr.h>
#include <base64_code.h>
#define STR(x) vstring_str(x)
#define LEN(x) VSTRING_LEN(x)
/* attr_vprint0 - send attribute list to stream */
int attr_vprint0(VSTREAM *fp, int flags, va_list ap)
{
const char *myname = "attr_print0";
int attr_type;
char *attr_name;
unsigned int_val;
unsigned long long_val;
char *str_val;
HTABLE_INFO **ht_info_list;
HTABLE_INFO **ht;
ssize_t len_val;
static VSTRING *base64_buf;
ATTR_PRINT_CUSTOM_FN print_fn;
void *print_arg;
/*
* Sanity check.
*/
if (flags & ~ATTR_FLAG_ALL)
msg_panic("%s: bad flags: 0x%x", myname, flags);
/*
* Iterate over all (type, name, value) triples, and produce output on
* the fly.
*/
while ((attr_type = va_arg(ap, int)) != ATTR_TYPE_END) {
switch (attr_type) {
case ATTR_TYPE_INT:
attr_name = va_arg(ap, char *);
vstream_fwrite(fp, attr_name, strlen(attr_name) + 1);
int_val = va_arg(ap, int);
vstream_fprintf(fp, "%u", (unsigned) int_val);
VSTREAM_PUTC('\0', fp);
if (msg_verbose)
msg_info("send attr %s = %u", attr_name, int_val);
break;
case ATTR_TYPE_LONG:
attr_name = va_arg(ap, char *);
vstream_fwrite(fp, attr_name, strlen(attr_name) + 1);
long_val = va_arg(ap, unsigned long);
vstream_fprintf(fp, "%lu", (unsigned long) long_val);
VSTREAM_PUTC('\0', fp);
if (msg_verbose)
msg_info("send attr %s = %lu", attr_name, long_val);
break;
case ATTR_TYPE_STR:
attr_name = va_arg(ap, char *);
vstream_fwrite(fp, attr_name, strlen(attr_name) + 1);
str_val = va_arg(ap, char *);
vstream_fwrite(fp, str_val, strlen(str_val) + 1);
if (msg_verbose)
msg_info("send attr %s = %s", attr_name, str_val);
break;
case ATTR_TYPE_DATA:
attr_name = va_arg(ap, char *);
vstream_fwrite(fp, attr_name, strlen(attr_name) + 1);
len_val = va_arg(ap, ssize_t);
str_val = va_arg(ap, char *);
if (base64_buf == 0)
base64_buf = vstring_alloc(10);
base64_encode(base64_buf, str_val, len_val);
vstream_fwrite(fp, STR(base64_buf), LEN(base64_buf) + 1);
if (msg_verbose)
msg_info("send attr %s = [data %ld bytes]",
attr_name, (long) len_val);
break;
case ATTR_TYPE_FUNC:
print_fn = va_arg(ap, ATTR_PRINT_CUSTOM_FN);
print_arg = va_arg(ap, void *);
print_fn(attr_print0, fp, flags | ATTR_FLAG_MORE, print_arg);
break;
case ATTR_TYPE_HASH:
vstream_fwrite(fp, ATTR_NAME_OPEN, sizeof(ATTR_NAME_OPEN));
ht_info_list = htable_list(va_arg(ap, HTABLE *));
for (ht = ht_info_list; *ht; ht++) {
vstream_fwrite(fp, ht[0]->key, strlen(ht[0]->key) + 1);
vstream_fwrite(fp, ht[0]->value, strlen(ht[0]->value) + 1);
if (msg_verbose)
msg_info("send attr name %s value %s",
ht[0]->key, (char *) ht[0]->value);
}
myfree((void *) ht_info_list);
vstream_fwrite(fp, ATTR_NAME_CLOSE, sizeof(ATTR_NAME_CLOSE));
break;
default:
msg_panic("%s: unknown type code: %d", myname, attr_type);
}
}
if ((flags & ATTR_FLAG_MORE) == 0)
VSTREAM_PUTC('\0', fp);
return (vstream_ferror(fp));
}
int attr_print0(VSTREAM *fp, int flags,...)
{
va_list ap;
int ret;
va_start(ap, flags);
ret = attr_vprint0(fp, flags, ap);
va_end(ap);
return (ret);
}
#ifdef TEST
/*
* Proof of concept test program. Mirror image of the attr_scan0 test
* program.
*/
#include <msg_vstream.h>
int main(int unused_argc, char **argv)
{
HTABLE *table = htable_create(1);
msg_vstream_init(argv[0], VSTREAM_ERR);
msg_verbose = 1;
htable_enter(table, "foo-name", mystrdup("foo-value"));
htable_enter(table, "bar-name", mystrdup("bar-value"));
attr_print0(VSTREAM_OUT, ATTR_FLAG_NONE,
SEND_ATTR_STR("protocol", "test"),
SEND_ATTR_INT(ATTR_NAME_INT, 4711),
SEND_ATTR_LONG(ATTR_NAME_LONG, 1234L),
SEND_ATTR_STR(ATTR_NAME_STR, "whoopee"),
SEND_ATTR_DATA(ATTR_NAME_DATA, strlen("whoopee"), "whoopee"),
SEND_ATTR_HASH(table),
SEND_ATTR_LONG(ATTR_NAME_LONG, 4321L),
ATTR_TYPE_END);
attr_print0(VSTREAM_OUT, ATTR_FLAG_NONE,
SEND_ATTR_STR("protocol", "test"),
SEND_ATTR_INT(ATTR_NAME_INT, 4711),
SEND_ATTR_LONG(ATTR_NAME_LONG, 1234L),
SEND_ATTR_STR(ATTR_NAME_STR, "whoopee"),
SEND_ATTR_DATA(ATTR_NAME_DATA, strlen("whoopee"), "whoopee"),
ATTR_TYPE_END);
attr_print0(VSTREAM_OUT, ATTR_FLAG_NONE,
SEND_ATTR_STR("protocol", "not-test"),
ATTR_TYPE_END);
if (vstream_fflush(VSTREAM_OUT) != 0)
msg_fatal("write error: %m");
htable_free(table, myfree);
return (0);
}
#endif
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