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-rw-r--r--src/util/attr_print64.c292
1 files changed, 292 insertions, 0 deletions
diff --git a/src/util/attr_print64.c b/src/util/attr_print64.c
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+/*++
+/* NAME
+/* attr_print64 3
+/* SUMMARY
+/* send attributes over byte stream
+/* SYNOPSIS
+/* #include <attr.h>
+/*
+/* int attr_print64(fp, flags, type, name, ..., ATTR_TYPE_END)
+/* VSTREAM fp;
+/* int flags;
+/* int type;
+/* char *name;
+/*
+/* int attr_vprint64(fp, flags, ap)
+/* VSTREAM fp;
+/* int flags;
+/* va_list ap;
+/* DESCRIPTION
+/* attr_print64() takes zero or more (name, value) simple attributes
+/* and converts its input to a byte stream that can be recovered with
+/* attr_scan64(). The stream is not flushed.
+/*
+/* attr_vprint64() 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_print64() argument list. This routine satisfies the formatting
+/* rules as outlined in attr_scan64(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_print64() 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_SLAVE_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_scan64(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 <base64_code.h>
+#include <attr.h>
+
+#define STR(x) vstring_str(x)
+#define LEN(x) VSTRING_LEN(x)
+
+/* attr_print64_str - encode and send attribute information */
+
+static void attr_print64_str(VSTREAM *fp, const char *str, ssize_t len)
+{
+ static VSTRING *base64_buf;
+
+ if (base64_buf == 0)
+ base64_buf = vstring_alloc(10);
+
+ base64_encode(base64_buf, str, len);
+ vstream_fputs(STR(base64_buf), fp);
+}
+
+static void attr_print64_num(VSTREAM *fp, unsigned num)
+{
+ static VSTRING *plain;
+
+ if (plain == 0)
+ plain = vstring_alloc(10);
+
+ vstring_sprintf(plain, "%u", num);
+ attr_print64_str(fp, STR(plain), LEN(plain));
+}
+
+static void attr_print64_long_num(VSTREAM *fp, unsigned long long_num)
+{
+ static VSTRING *plain;
+
+ if (plain == 0)
+ plain = vstring_alloc(10);
+
+ vstring_sprintf(plain, "%lu", long_num);
+ attr_print64_str(fp, STR(plain), LEN(plain));
+}
+
+/* attr_vprint64 - send attribute list to stream */
+
+int attr_vprint64(VSTREAM *fp, int flags, va_list ap)
+{
+ const char *myname = "attr_print64";
+ 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;
+ ATTR_PRINT_SLAVE_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 *);
+ attr_print64_str(fp, attr_name, strlen(attr_name));
+ int_val = va_arg(ap, int);
+ VSTREAM_PUTC(':', fp);
+ attr_print64_num(fp, (unsigned) int_val);
+ VSTREAM_PUTC('\n', 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 *);
+ attr_print64_str(fp, attr_name, strlen(attr_name));
+ long_val = va_arg(ap, long);
+ VSTREAM_PUTC(':', fp);
+ attr_print64_long_num(fp, (unsigned long) long_val);
+ VSTREAM_PUTC('\n', 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 *);
+ attr_print64_str(fp, attr_name, strlen(attr_name));
+ str_val = va_arg(ap, char *);
+ VSTREAM_PUTC(':', fp);
+ attr_print64_str(fp, str_val, strlen(str_val));
+ VSTREAM_PUTC('\n', fp);
+ if (msg_verbose)
+ msg_info("send attr %s = %s", attr_name, str_val);
+ break;
+ case ATTR_TYPE_DATA:
+ attr_name = va_arg(ap, char *);
+ attr_print64_str(fp, attr_name, strlen(attr_name));
+ len_val = va_arg(ap, ssize_t);
+ str_val = va_arg(ap, char *);
+ VSTREAM_PUTC(':', fp);
+ attr_print64_str(fp, str_val, len_val);
+ VSTREAM_PUTC('\n', fp);
+ 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_SLAVE_FN);
+ print_arg = va_arg(ap, void *);
+ print_fn(attr_print64, fp, flags | ATTR_FLAG_MORE, print_arg);
+ break;
+ case ATTR_TYPE_HASH:
+ attr_print64_str(fp, ATTR_NAME_OPEN, sizeof(ATTR_NAME_OPEN) - 1);
+ VSTREAM_PUTC('\n', fp);
+ ht_info_list = htable_list(va_arg(ap, HTABLE *));
+ for (ht = ht_info_list; *ht; ht++) {
+ attr_print64_str(fp, ht[0]->key, strlen(ht[0]->key));
+ VSTREAM_PUTC(':', fp);
+ attr_print64_str(fp, ht[0]->value, strlen(ht[0]->value));
+ VSTREAM_PUTC('\n', fp);
+ if (msg_verbose)
+ msg_info("send attr name %s value %s",
+ ht[0]->key, (char *) ht[0]->value);
+ }
+ myfree((void *) ht_info_list);
+ attr_print64_str(fp, ATTR_NAME_CLOSE, sizeof(ATTR_NAME_CLOSE) - 1);
+ VSTREAM_PUTC('\n', fp);
+ break;
+ default:
+ msg_panic("%s: unknown type code: %d", myname, attr_type);
+ }
+ }
+ if ((flags & ATTR_FLAG_MORE) == 0)
+ VSTREAM_PUTC('\n', fp);
+ return (vstream_ferror(fp));
+}
+
+int attr_print64(VSTREAM *fp, int flags,...)
+{
+ va_list ap;
+ int ret;
+
+ va_start(ap, flags);
+ ret = attr_vprint64(fp, flags, ap);
+ va_end(ap);
+ return (ret);
+}
+
+#ifdef TEST
+
+ /*
+ * Proof of concept test program. Mirror image of the attr_scan64 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_print64(VSTREAM_OUT, ATTR_FLAG_NONE,
+ 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_print64(VSTREAM_OUT, ATTR_FLAG_NONE,
+ 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);
+ if (vstream_fflush(VSTREAM_OUT) != 0)
+ msg_fatal("write error: %m");
+
+ htable_free(table, myfree);
+ return (0);
+}
+
+#endif
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