GCOV - Varnish Cache


/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006-2016 Varnish Software AS
 * All rights reserved.
 *
 * Author: Anders Berg <andersb@vgnett.no>
 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
 * Author: Tollef Fog Heen <tfheen@varnish-software.com>
 * Author: Martin Blix Grydeland <mbgrydeland@varnish-software.com>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * Obtain log data from the shared memory log, order it by session ID, and
 * display it in Apache / NCSA combined log format.
 *
 * See doc/sphinx/reference/varnishncsa.rst for the supported format
 * specifiers.
 *
 */

#include "config.h"

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <stdarg.h>
#include <inttypes.h>
#include <limits.h>
#include <ctype.h>
#include <time.h>
#include <math.h>

#define VOPT_DEFINITION
#define VOPT_INC "varnishncsa_options.h"

#include "vdef.h"

#include "vapi/vsl.h"
#include "vapi/voptget.h"
#include "vas.h"
#include "venc.h"
#include "vsb.h"
#include "vut.h"
#include "vqueue.h"
#include "miniobj.h"

#define TIME_FMT "[%d/%b/%Y:%T %z]"
#define FORMAT "%h %l %u %t \"%r\" %s %b \"%{Referer}i\" \"%{User-agent}i\""

static struct VUT *vut;

struct format;

enum e_frag {
        F_H,                    /* %H Proto */
        F_U,                    /* %U URL path */
        F_q,                    /* %q Query string */
        F_b,                    /* %b Body bytes sent */
        F_h,                    /* %h Host name / IP Address */
        F_m,                    /* %m Method */
        F_s,                    /* %s Status */
        F_I,                    /* %I Bytes received */
        F_O,                    /* %O Bytes sent */
        F_tstart,               /* Time start */
        F_tend,                 /* Time end */
        F_ttfb,                 /* %{Varnish:time_firstbyte}x */
        F_host,                 /* Host header */
        F_auth,                 /* Authorization header */
        F__MAX,
};

enum format_policy {
        FMTPOL_INTERNAL = 1,
        FMTPOL_REQ,
        FMTPOL_RESP,
        FMTPOL_FIRST,
        FMTPOL_LAST
};

struct fragment {
        uint64_t                gen;
        const char              *b, *e;
};

typedef int format_f(const struct format *format);

struct format {
        unsigned                magic;
#define FORMAT_MAGIC            0xC3119CDA

        char                    time_type;
        VTAILQ_ENTRY(format)    list;
        format_f                *func;
        struct fragment         *frag;
        char                    *string;
        const char *const       *strptr;
        char                    *time_fmt;
        int64_t                 *int64;
};

struct watch {
        unsigned                magic;
#define WATCH_MAGIC             0xA7D4005C

        VTAILQ_ENTRY(watch)     list;
        char                    *key;
        int                     keylen;
        struct fragment         frag;
        enum format_policy      match;
};
VTAILQ_HEAD(watch_head, watch);

struct vsl_watch {
        unsigned                magic;
#define VSL_WATCH_MAGIC         0xE3E27D23

        VTAILQ_ENTRY(vsl_watch) list;
        enum VSL_tag_e          tag;
        int                     idx;
        char                    *prefix;
        int                     prefixlen;
        struct fragment         frag;
};
VTAILQ_HEAD(vsl_watch_head, vsl_watch);

static struct ctx {
        /* Options */
        int                     a_opt;
        char                    *w_arg;

        FILE                    *fo;
        struct vsb              *vsb;
        uint64_t                gen;
        VTAILQ_HEAD(,format)    format;
        int                     quote_how;
        char                    *missing_string;
        char                    *missing_int;

        /* State */
        struct watch_head       watch_vcl_log;
        struct watch_head       watch_reqhdr; /* also bereqhdr */
        struct watch_head       watch_resphdr; /* also beresphdr */
        struct vsl_watch_head   watch_vsl;
        struct fragment         frag[F__MAX];
        const char              *hitmiss;
        const char              *handling;
        const char              *side;
        int64_t                 vxid;
        int                     recv_compl;
} CTX;

static void parse_format(const char *format);

static unsigned
frag_needed(const struct fragment *frag, enum format_policy fp)
{
        unsigned is_first, want_first, want_frag;

        is_first = CTX.gen != frag->gen;

        switch (fp) {
        case FMTPOL_LAST:
                want_frag = 1;
                want_first = 0;
                break;
        case FMTPOL_FIRST:
        case FMTPOL_INTERNAL:
                want_first = 1;
                want_frag = 1;
                break;
        case FMTPOL_REQ:
                want_first = *CTX.side == 'c';
                want_frag = !CTX.recv_compl;
                break;
        case FMTPOL_RESP:
                want_first = *CTX.side == 'b';
                want_frag = (*CTX.side == 'c') || !CTX.recv_compl;
                break;
        default:
                WRONG("Invalid format policy");
        }

        if (!want_frag)
                return (0);
        if (want_first && !is_first)
                return (0);
        return (1);
}

static void
openout(int append)
{

        AN(CTX.w_arg);
        if (!strcmp(CTX.w_arg, "-"))
                CTX.fo = stdout;
        else
                CTX.fo = fopen(CTX.w_arg, append ? "a" : "w");
        if (CTX.fo == NULL)
                VUT_Error(vut, 1, "Can't open output file (%s)",
                    strerror(errno));
}

static int v_matchproto_(VUT_cb_f)
rotateout(struct VUT *v)
{

        assert(v == vut);
        AN(CTX.w_arg);
        AN(CTX.fo);
        (void)fclose(CTX.fo);
        openout(1);
        AN(CTX.fo);
        return (0);
}

static int v_matchproto_(VUT_cb_f)
flushout(struct VUT *v)
{

        assert(v == vut);
        AN(CTX.fo);
        if (fflush(CTX.fo))
                return (-5);
        return (0);
}

static inline int
vsb_fcat(struct vsb *vsb, const struct fragment *f, const char *dflt)
{
        if (f->gen == CTX.gen) {
                assert(f->b <= f->e);
                VSB_quote(vsb, f->b, f->e - f->b, CTX.quote_how);
        } else if (dflt)
                VSB_quote(vsb, dflt, -1, CTX.quote_how);
        else
                return (-1);
        return (0);
}

static int v_matchproto_(format_f)
format_string(const struct format *format)
{

        CHECK_OBJ_NOTNULL(format, FORMAT_MAGIC);
        AN(format->string);
        AZ(VSB_cat(CTX.vsb, format->string));
        return (1);
}

static int v_matchproto_(format_f)
format_strptr(const struct format *format)
{

        CHECK_OBJ_NOTNULL(format, FORMAT_MAGIC);
        AN(format->strptr);
        AN(*format->strptr);
        AZ(VSB_cat(CTX.vsb, *format->strptr));
        return (1);
}

static int v_matchproto_(format_f)
format_int64(const struct format *format)
{

        CHECK_OBJ_NOTNULL(format, FORMAT_MAGIC);
        VSB_printf(CTX.vsb, "%jd", (intmax_t)*format->int64);
        return (1);
}

static int v_matchproto_(format_f)
format_fragment(const struct format *format)
{

        CHECK_OBJ_NOTNULL(format, FORMAT_MAGIC);
        AN(format->frag);

        if (format->frag->gen != CTX.gen) {
                if (format->string == NULL)
                        return (-1);
                VSB_quote(CTX.vsb, format->string, -1, CTX.quote_how);
                return (0);
        }
        AZ(vsb_fcat(CTX.vsb, format->frag, NULL));
        return (1);
}

static int v_matchproto_(format_f)
format_time(const struct format *format)
{
        double t_start, t_end, d;
        char *p;
        char buf[64];
        time_t t;
        intmax_t l;
        struct tm tm;

        CHECK_OBJ_NOTNULL(format, FORMAT_MAGIC);
        if (CTX.frag[F_tstart].gen == CTX.gen) {
                t_start = strtod(CTX.frag[F_tstart].b, &p);
                if (p != CTX.frag[F_tstart].e)
                        t_start = NAN;
        } else
                t_start = NAN;
        if (isnan(t_start)) {
                /* Missing t_start is a no go */
                if (format->string == NULL)
                        return (-1);
                AZ(VSB_cat(CTX.vsb, format->string));
                return (0);
        }

        /* Missing t_end defaults to t_start */
        if (CTX.frag[F_tend].gen == CTX.gen) {
                t_end = strtod(CTX.frag[F_tend].b, &p);
                if (p != CTX.frag[F_tend].e)
                        t_end = t_start;
        } else
                t_end = t_start;

        AN(format->time_fmt);

        switch (format->time_type) {
        case 't':
                t = (intmax_t)floor(t_start);
                (void)localtime_r(&t, &tm);
                AN(strftime(buf, sizeof buf, format->time_fmt, &tm));
                AZ(VSB_cat(CTX.vsb, buf));
                return (1);
        case '3':
                l = (intmax_t)(modf(t_start, &d) * 1e3);
                break;
        case '6':
                l = (intmax_t)(modf(t_start, &d) * 1e6);
                break;
        case 'S':
                l = (intmax_t)t_start;
                break;
        case 'M':
                l = (intmax_t)(t_start * 1e3);
                break;
        case 'U':
                l = (intmax_t)(t_start * 1e6);
                break;
        case 's':
                l = (intmax_t)(t_end - t_start);
                break;
        case 'm':
                l = (intmax_t)((t_end - t_start) * 1e3);
                break;
        case 'u':
                l = (intmax_t)((t_end - t_start) * 1e6);
                break;
        default:
                WRONG("Time format specifier");
        }

#ifdef __FreeBSD__
        assert(fmtcheck(format->time_fmt, "%jd") == format->time_fmt);
#endif
        AZ(VSB_printf(CTX.vsb, format->time_fmt, l));

        return (1);
}

static int v_matchproto_(format_f)
format_requestline(const struct format *format)
{

        (void)format;
        AZ(vsb_fcat(CTX.vsb, &CTX.frag[F_m], "-"));
        AZ(VSB_putc(CTX.vsb, ' '));
        if (CTX.frag[F_host].gen == CTX.gen) {
                if (strncmp(CTX.frag[F_host].b, "http://", 7))
                        AZ(VSB_cat(CTX.vsb, "http://"));
                AZ(vsb_fcat(CTX.vsb, &CTX.frag[F_host], NULL));
        } else
                AZ(VSB_cat(CTX.vsb, "http://localhost"));
        AZ(vsb_fcat(CTX.vsb, &CTX.frag[F_U], ""));
        AZ(vsb_fcat(CTX.vsb, &CTX.frag[F_q], ""));
        AZ(VSB_putc(CTX.vsb, ' '));
        AZ(vsb_fcat(CTX.vsb, &CTX.frag[F_H], "HTTP/1.0"));
        return (1);
}

static int v_matchproto_(format_f)
format_auth(const struct format *format)
{
        struct vsb *vsb = VSB_new_auto();
        AN(vsb);
        char *q;

        if (CTX.frag[F_auth].gen != CTX.gen ||
            VENC_Decode_Base64(vsb, CTX.frag[F_auth].b, CTX.frag[F_auth].e)) {
                VSB_destroy(&vsb);
                if (format->string == NULL)
                        return (-1);
                VSB_quote(CTX.vsb, format->string, -1, CTX.quote_how);
                return (0);
        }
        AZ(VSB_finish(vsb));
        q = strchr(VSB_data(vsb), ':');
        if (q != NULL)
                *q = '\0';
        VSB_quote(CTX.vsb, VSB_data(vsb), -1, CTX.quote_how);
        VSB_destroy(&vsb);
        return (1);
}

static int
print(void)
{
        const struct format *f;
        int i, r = 1;

        VSB_clear(CTX.vsb);
        VTAILQ_FOREACH(f, &CTX.format, list) {
                CHECK_OBJ_NOTNULL(f, FORMAT_MAGIC);
                i = (f->func)(f);
                AZ(VSB_error(CTX.vsb));
                if (r > i)
                        r = i;
        }
        AZ(VSB_putc(CTX.vsb, '\n'));
        AZ(VSB_finish(CTX.vsb));
        if (r >= 0) {
                i = fwrite(VSB_data(CTX.vsb), 1, VSB_len(CTX.vsb), CTX.fo);
                if (i != VSB_len(CTX.vsb))
                        return (-5);
        }
        return (0);
}

static void
addf_string(const char *str)
{
        struct format *f;

        AN(str);
        ALLOC_OBJ(f, FORMAT_MAGIC);
        AN(f);
        f->func = format_string;
        f->string = strdup(str);
        AN(f->string);
        VTAILQ_INSERT_TAIL(&CTX.format, f, list);
}

static void
addf_strptr(const char *const *strptr)
{
        struct format *f;

        AN(strptr);
        ALLOC_OBJ(f, FORMAT_MAGIC);
        AN(f);
        f->func = format_strptr;
        f->strptr = strptr;
        VTAILQ_INSERT_TAIL(&CTX.format, f, list);
}

static void
addf_fragment(struct fragment *frag, const char *str)
{
        struct format *f;

        AN(frag);
        ALLOC_OBJ(f, FORMAT_MAGIC);
        AN(f);
        f->func = format_fragment;
        f->frag = frag;
        if (str != NULL) {
                f->string = strdup(str);
                AN(f->string);
        }
        VTAILQ_INSERT_TAIL(&CTX.format, f, list);
}

static void
addf_int64(int64_t *i)
{
        struct format *f;

        AN(i);
        ALLOC_OBJ(f, FORMAT_MAGIC);
        AN(f);
        f->func = format_int64;
        f->int64 = i;
        VTAILQ_INSERT_TAIL(&CTX.format, f, list);
}

static void
addf_time(char type, const char *fmt)
{
        struct format *f;

        ALLOC_OBJ(f, FORMAT_MAGIC);
        AN(f);
        AN(fmt);
        f->func = format_time;
        f->time_type = type;
        f->time_fmt = strdup(fmt);

        if (f->time_type == 'T') {
                if (!strcmp(fmt, "s"))
                        f->time_type = 's';
                else if (!strcmp(fmt, "ms"))
                        f->time_type = 'm';
                else if (!strcmp(fmt, "us"))
                        f->time_type = 'u';
                else
                        VUT_Error(vut, 1, "Unknown specifier: %%{%s}T",
                            fmt);
                REPLACE(f->time_fmt, "%jd");
        } else if (f->time_type == 't') {
                if (!strcmp(fmt, "sec")) {
                        f->time_type = 'S';
                        REPLACE(f->time_fmt, "%jd");
                } else if (!strncmp(fmt, "msec", 4)) {
                        fmt += 4;
                        if (!strcmp(fmt, "_frac")) {
                                f->time_type = '3';
                                REPLACE(f->time_fmt, "%03jd");
                        } else if (*fmt == '\0') {
                                f->time_type = 'M';
                                REPLACE(f->time_fmt, "%jd");
                        }
                } else if (!strncmp(fmt, "usec", 4)) {
                        fmt += 4;
                        if (!strcmp(fmt, "_frac")) {
                                f->time_type = '6';
                                REPLACE(f->time_fmt, "%06jd");
                        } else if (*fmt == '\0') {
                                f->time_type = 'U';
                                REPLACE(f->time_fmt, "%jd");
                        }
                }
        }

        AN(f->time_fmt);
        VTAILQ_INSERT_TAIL(&CTX.format, f, list);
}

static void
addf_requestline(void)
{
        struct format *f;

        ALLOC_OBJ(f, FORMAT_MAGIC);
        AN(f);
        f->func = format_requestline;
        VTAILQ_INSERT_TAIL(&CTX.format, f, list);
}

static void
addf_vcl_log(const char *key)
{
        struct watch *w;
        struct format *f;

        AN(key);
        ALLOC_OBJ(w, WATCH_MAGIC);
        AN(w);
        w->keylen = asprintf(&w->key, "%s:", key);
        assert(w->keylen > 0);
        VTAILQ_INSERT_TAIL(&CTX.watch_vcl_log, w, list);

        ALLOC_OBJ(f, FORMAT_MAGIC);
        AN(f);
        f->func = format_fragment;
        f->frag = &w->frag;
        f->string = strdup("");
        AN(f->string);
        VTAILQ_INSERT_TAIL(&CTX.format, f, list);
}

static void
addf_hdr(struct watch_head *head, char *key)
{
        struct watch *w;
        struct format *f;
        char *match;

        AN(head);
        AN(key);
        ALLOC_OBJ(w, WATCH_MAGIC);
        AN(w);

        match = strchr(key, ':');
        if (match != NULL) {
                match++;
                if (!strncmp(match, "first", 5))
                        w->match = FMTPOL_FIRST;
                else if (!strncmp(match, "last", 4))
                        w->match = FMTPOL_LAST;
                else
                        VUT_Error(vut, 1, "Unknown match rule :%s", match);
                match[-1] = '\0';
        }

        w->keylen = asprintf(&w->key, "%s:", key);
        assert(w->keylen > 0);
        VTAILQ_INSERT_TAIL(head, w, list);

        ALLOC_OBJ(f, FORMAT_MAGIC);
        AN(f);
        f->func = format_fragment;
        f->frag = &w->frag;
        f->string = strdup(CTX.missing_string);
        AN(f->string);
        VTAILQ_INSERT_TAIL(&CTX.format, f, list);
}

static void
addf_vsl(enum VSL_tag_e tag, long i, const char *prefix)
{
        struct vsl_watch *w;

        ALLOC_OBJ(w, VSL_WATCH_MAGIC);
        AN(w);
        if (VSL_tagflags[tag] && CTX.quote_how != VSB_QUOTE_JSON)
                VUT_Error(vut, 1, "Tag %s can contain control characters",
                    VSL_tags[tag]);
        w->tag = tag;
        assert(i <= INT_MAX);
        w->idx = i;
        if (prefix != NULL) {
                w->prefixlen = asprintf(&w->prefix, "%s:", prefix);
                assert(w->prefixlen > 0);
        }
        VTAILQ_INSERT_TAIL(&CTX.watch_vsl, w, list);
        addf_fragment(&w->frag, CTX.missing_string);
}

static void
addf_auth(void)
{
        struct format *f;

        ALLOC_OBJ(f, FORMAT_MAGIC);
        AN(f);
        f->func = format_auth;
        f->string = strdup("-");
        AN(f->string);
        VTAILQ_INSERT_TAIL(&CTX.format, f, list);
}

static void
parse_x_format(char *buf)
{
        char *e, *r, *s;
        long lval;
        int slt;

        if (!strcmp(buf, "Varnish:time_firstbyte")) {
                addf_fragment(&CTX.frag[F_ttfb], CTX.missing_int);
                return;
        }
        if (!strcmp(buf, "Varnish:hitmiss")) {
                addf_strptr(&CTX.hitmiss);
                return;
        }
        if (!strcmp(buf, "Varnish:handling")) {
                addf_strptr(&CTX.handling);
                return;
        }
        if (!strcmp(buf, "Varnish:side")) {
                addf_strptr(&CTX.side);
                return;
        }
        if (!strcmp(buf, "Varnish:vxid")) {
                addf_int64(&CTX.vxid);
                return;
        }
        if (!strncmp(buf, "VCL_Log:", 8)) {
                addf_vcl_log(buf + 8);
                return;
        }
        if (!strncmp(buf, "VSL:", 4)) {
                buf += 4;
                e = buf;
                while (*e != '\0')
                        e++;
                if (e == buf)
                        VUT_Error(vut, 1, "Missing tag in VSL:");
                if (e[-1] == ']') {
                        r = e - 1;
                        while (r > buf && *r != '[')
                                r--;
                        if (r == buf || r[1] == ']')
                                VUT_Error(vut, 1, "Syntax error: VSL:%s", buf);
                        e[-1] = '\0';
                        lval = strtol(r + 1, &s, 10);
                        if (s != e - 1)
                                VUT_Error(vut, 1, "Syntax error: VSL:%s]", buf);
                        if (lval <= 0 || lval > 255) {
                                VUT_Error(vut, 1,
                                    "Syntax error. Field specifier must be"
                                    " between 1 and 255: %s]",
                                    buf);
                        }
                        *r = '\0';
                } else
                        lval = 0;
                r = buf;
                while (r < e && *r != ':')
                        r++;
                if (r != e) {
                        slt = VSL_Name2Tag(buf, r - buf);
                        r++;
                } else {
                        slt = VSL_Name2Tag(buf, -1);
                        r = NULL;
                }
                if (slt == -2)
                        VUT_Error(vut, 1, "Tag not unique: %s", buf);
                if (slt == -1)
                        VUT_Error(vut, 1, "Unknown log tag: %s", buf);
                assert(slt >= 0);

                addf_vsl((enum VSL_tag_e)slt, lval, r);
                return;
        }
        if (!strcmp(buf, "Varnish:default_format")) {
                parse_format(FORMAT);
                return;
        }
        VUT_Error(vut, 1, "Unknown formatting extension: %s", buf);
}

static void
parse_format(const char *format)
{
        const char *p, *q;
        struct vsb *vsb;
        char buf[256];
        int b;

        if (format == NULL)
                format = FORMAT;

        vsb = VSB_new_auto();
        AN(vsb);

        for (p = format; *p != '\0'; p++) {

                /* Allow the most essential escape sequences in format */
                if (*p == '\\' && p[1] != '\0') {
                        if (*++p == 't')
                                AZ(VSB_putc(vsb, '\t'));
                        else if (*p == 'n')
                                AZ(VSB_putc(vsb, '\n'));
                        else
                                AZ(VSB_putc(vsb, *p));
                        continue;
                }

                if (*p != '%') {
                        AZ(VSB_putc(vsb, *p));
                        continue;
                }

                if (VSB_len(vsb) > 0) {
                        AZ(VSB_finish(vsb));
                        addf_string(VSB_data(vsb));
                        VSB_clear(vsb);
                }

                p++;
                switch (*p) {
                case 'b':       /* Body bytes sent */
                        addf_fragment(&CTX.frag[F_b], CTX.missing_int);
                        break;
                case 'D':       /* Float request time */
                        addf_time('T', "us");
                        break;
                case 'h':       /* Client host name / IP Address */
                        addf_fragment(&CTX.frag[F_h], CTX.missing_string);
                        break;
                case 'H':       /* Protocol */
                        addf_fragment(&CTX.frag[F_H], "HTTP/1.0");
                        break;
                case 'I':       /* Bytes received */
                        addf_fragment(&CTX.frag[F_I], CTX.missing_int);
                        break;
                case 'l':       /* Client user ID (identd) always '-' */
                        AZ(VSB_putc(vsb, '-'));
                        break;
                case 'm':       /* Method */
                        addf_fragment(&CTX.frag[F_m], CTX.missing_string);
                        break;
                case 'O':       /* Bytes sent */
                        addf_fragment(&CTX.frag[F_O], CTX.missing_int);
                        break;
                case 'q':       /* Query string */
                        addf_fragment(&CTX.frag[F_q], "");
                        break;
                case 'r':       /* Request line */
                        addf_requestline();
                        break;
                case 's':       /* Status code */
                        addf_fragment(&CTX.frag[F_s], CTX.missing_int);
                        break;
                case 't':       /* strftime */
                        addf_time(*p, TIME_FMT);
                        break;
                case 'T':       /* Int request time */
                        addf_time(*p, "s");
                        break;
                case 'u':       /* Remote user from auth */
                        addf_auth();
                        break;
                case 'U':       /* URL */
                        addf_fragment(&CTX.frag[F_U], CTX.missing_string);
                        break;
                case '{':
                        p++;
                        q = p;
                        b = 1;
                        while (*q) {
                                if (*q == '{')
                                        b++;
                                else if (*q == '}')
                                        if (--b == 0)
                                                break;
                                q++;
                        }
                        if (b > 0)
                                VUT_Error(vut, 1, "Unmatched bracket at: %s",
                                    p - 2);
                        assert((unsigned)(q - p) < sizeof buf - 1);
                        strncpy(buf, p, q - p);
                        buf[q - p] = '\0';
                        q++;
                        switch (*q) {
                        case 'i':
                                addf_hdr(&CTX.watch_reqhdr, buf);
                                break;
                        case 'o':
                                addf_hdr(&CTX.watch_resphdr, buf);
                                break;
                        case 't':
                                addf_time(*q, buf);
                                break;
                        case 'T':
                                addf_time(*q, buf);
                                break;
                        case 'x':
                                parse_x_format(buf);
                                break;
                        default:
                                VUT_Error(vut, 1,
                                    "Unknown format specifier at: %s",
                                    p - 2);
                        }
                        p = q;
                        break;
                default:
                        VUT_Error(vut, 1, "Unknown format specifier at: %s",
                            p - 1);
                }
        }

        if (VSB_len(vsb) > 0) {
                /* Add any remaining static */
                AZ(VSB_finish(vsb));
                addf_string(VSB_data(vsb));
                VSB_clear(vsb);
        }

        VSB_destroy(&vsb);
}

static int
isprefix(const char *prefix, size_t len, const char *b,
    const char *e, const char **next)
{
        assert(len > 0);
        if (e < b + len || strncasecmp(b, prefix, len))
                return (0);
        b += len;
        if (next) {
                while (b < e && *b == ' ')
                        b++;
                *next = b;
        }
        return (1);
}

static void
frag_fields(enum format_policy fp, const char *b, const char *e, ...)
{
        va_list ap;
        const char *p, *q;
        int n, field;
        struct fragment *frag;

        AN(b);
        AN(e);
        va_start(ap, e);

        n = 0;
        while (1) {
                field = va_arg(ap, int);
                frag = va_arg(ap, struct fragment *);
                if (field == 0) {
                        AZ(frag);
                        break;
                }
                p = q = NULL;
                while (n < field) {
                        while (b < e && isspace(*b))
                                b++;
                        p = b;
                        while (b < e && !isspace(*b))
                                b++;
                        q = b;
                        n++;
                }
                assert(p != NULL && q != NULL);
                if (p >= e || q <= p)
                        continue;
                if (frag_needed(frag, fp)) {
                        /* We only grab the same matching field once */
                        frag->gen = CTX.gen;
                        frag->b = p;
                        frag->e = q;
                }
        }
        va_end(ap);
}

static void
frag_line(enum format_policy fp, const char *b, const char *e,
    struct fragment *f)
{

        if (!frag_needed(f, fp)) {
                /* We only grab the same matching record once */
                return;
        }

        if (e == NULL)
                e = b + strlen(b);

        /* Skip leading space */
        while (b < e && isspace(*b))
                ++b;

        /* Skip trailing space */
        while (e > b && isspace(e[-1]))
                --e;

        f->gen = CTX.gen;
        f->b = b;
        f->e = e;
}

static void
process_hdr(enum format_policy fp, const struct watch_head *head, const char *b,
    const char *e, int unset)
{
        struct watch *w;
        const char *p;

        VTAILQ_FOREACH(w, head, list) {
                CHECK_OBJ_NOTNULL(w, WATCH_MAGIC);
                if (!isprefix(w->key, w->keylen, b, e, &p))
                        continue;

                if (w->match) {
                        assert(w->match == FMTPOL_FIRST ||
                            w->match == FMTPOL_LAST);
                        fp = w->match;
                }

                if (unset && !w->match) {
                        frag_line(fp, CTX.missing_string,
                            NULL,
                            &w->frag);
                } else
                        frag_line(fp, p, e, &w->frag);
        }
}

static void
process_vsl(const struct vsl_watch_head *head, enum VSL_tag_e tag,
    const char *b, const char *e)
{
        struct vsl_watch *w;
        const char *p;
        VTAILQ_FOREACH(w, head, list) {
                CHECK_OBJ_NOTNULL(w, VSL_WATCH_MAGIC);
                if (tag != w->tag)
                        continue;
                p = b;
                if (w->prefixlen > 0 &&
                    !isprefix(w->prefix, w->prefixlen, b, e, &p))
                        continue;
                if (w->idx == 0)
                        frag_line(FMTPOL_INTERNAL, p, e, &w->frag);
                else
                        frag_fields(FMTPOL_INTERNAL, p, e, w->idx, &w->frag, 0, NULL);
        }
}

static int v_matchproto_(VSLQ_dispatch_f)
dispatch_f(struct VSL_data *vsl, struct VSL_transaction * const pt[],
    void *priv)
{
        struct VSL_transaction *t;
        enum VSL_tag_e tag;
        const char *b, *e, *p;
        struct watch *w;
        int i, skip;

        (void)vsl;
        (void)priv;

        for (t = pt[0]; t != NULL; t = *++pt) {
                CTX.gen++;

                if (t->type == VSL_t_req) {
                        CTX.side = "c";
                } else if (t->type == VSL_t_bereq) {
                        CTX.side = "b";
                } else
                        continue;

                CTX.recv_compl = 0;
                CTX.hitmiss = "-";
                CTX.handling = "-";
                CTX.vxid = t->vxid;
                skip = 0;
                while (skip == 0 && 1 == VSL_Next(t->c)) {
                        tag = VSL_TAG(t->c->rec.ptr);
                        if (VSL_tagflags[tag] &&
                            CTX.quote_how != VSB_QUOTE_JSON)
                                continue;

                        b = VSL_CDATA(t->c->rec.ptr);
                        e = b + VSL_LEN(t->c->rec.ptr);
                        if (!VSL_tagflags[tag]) {
                                while (e > b && e[-1] == '\0')
                                        e--;
                        }

                        switch (tag) {
                        case SLT_HttpGarbage:
                                skip = 1;
                                break;
                        case SLT_PipeAcct:
                                frag_fields(FMTPOL_INTERNAL, b, e,
                                    3, &CTX.frag[F_I],
                                    4, &CTX.frag[F_O],
                                    0, NULL);
                                break;
                        case SLT_BackendOpen:
                                frag_fields(FMTPOL_INTERNAL, b, e,
                                    3, &CTX.frag[F_h],
                                    0, NULL);
                                break;
                        case SLT_ReqStart:
                                frag_fields(FMTPOL_INTERNAL, b, e,
                                    1, &CTX.frag[F_h],
                                    0, NULL);
                                break;
                        case SLT_BereqMethod:
                        case SLT_ReqMethod:
                                frag_line(FMTPOL_REQ, b, e, &CTX.frag[F_m]);
                                break;
                        case SLT_BereqURL:
                        case SLT_ReqURL:
                                p = memchr(b, '?', e - b);
                                if (p == NULL)
                                        p = e;
                                frag_line(FMTPOL_REQ, b, p, &CTX.frag[F_U]);
                                frag_line(FMTPOL_REQ, p, e, &CTX.frag[F_q]);
                                break;
                        case SLT_BereqProtocol:
                        case SLT_ReqProtocol:
                                frag_line(FMTPOL_REQ, b, e, &CTX.frag[F_H]);
                                break;
                        case SLT_BerespStatus:
                        case SLT_RespStatus:
                                frag_line(FMTPOL_RESP, b, e, &CTX.frag[F_s]);
                                break;
                        case SLT_BereqAcct:
                        case SLT_ReqAcct:
                                frag_fields(FMTPOL_INTERNAL, b, e,
                                    3, &CTX.frag[F_I],
                                    5, &CTX.frag[F_b],
                                    6, &CTX.frag[F_O],
                                    0, NULL);
                                break;
                        case SLT_Timestamp:
#define ISPREFIX(a, b, c, d)    isprefix(a, strlen(a), b, c, d)
                                if (ISPREFIX("Start:", b, e, &p)) {
                                        frag_fields(FMTPOL_INTERNAL, p, e, 1,
                                            &CTX.frag[F_tstart], 0, NULL);

                                } else if (ISPREFIX("Resp:", b, e, &p) ||
                                    ISPREFIX("PipeSess:", b, e, &p) ||
                                    ISPREFIX("BerespBody:", b, e, &p)) {
                                        frag_fields(FMTPOL_INTERNAL, p, e, 1,
                                            &CTX.frag[F_tend], 0, NULL);

                                } else if (ISPREFIX("Process:", b, e, &p) ||
                                    ISPREFIX("Pipe:", b, e, &p) ||
                                    ISPREFIX("Beresp:", b, e, &p)) {
                                        frag_fields(FMTPOL_INTERNAL, p, e, 2,
                                            &CTX.frag[F_ttfb], 0, NULL);
                                }
                                break;
                        case SLT_BereqHeader:
                        case SLT_ReqHeader:
                                process_hdr(FMTPOL_REQ, &CTX.watch_reqhdr, b, e, 0);
                                if (ISPREFIX("Authorization:", b, e, &p) &&
                                    ISPREFIX("basic ", p, e, &p))
                                        frag_line(FMTPOL_REQ, p, e,
                                            &CTX.frag[F_auth]);
                                else if (ISPREFIX("Host:", b, e, &p))
                                        frag_line(FMTPOL_REQ, p, e,
                                            &CTX.frag[F_host]);
#undef ISPREFIX
                                break;
                        case SLT_BerespHeader:
                        case SLT_RespHeader:
                                process_hdr(FMTPOL_RESP, &CTX.watch_resphdr, b, e, 0);
                                break;
                        case SLT_BereqUnset:
                        case SLT_ReqUnset:
                                process_hdr(FMTPOL_REQ, &CTX.watch_reqhdr, b, e, 1);
                                break;
                        case SLT_BerespUnset:
                        case SLT_RespUnset:
                                process_hdr(FMTPOL_RESP, &CTX.watch_resphdr, b, e, 1);
                                break;
                        case SLT_HitMiss:
                                CTX.hitmiss = "miss";
                                CTX.handling = "hitmiss";
                                break;
                        case SLT_HitPass:
                                CTX.hitmiss = "miss";
                                CTX.handling = "hitpass";
                                break;
                        case SLT_VCL_call:
                                if (!strcasecmp(b, "recv")) {
                                        CTX.recv_compl = 1;
                                        CTX.hitmiss = "-";
                                        CTX.handling = "-";
                                } else if (!strcasecmp(b, "hit")) {
                                        CTX.hitmiss = "hit";
                                        CTX.handling = "hit";
                                } else if (!strcasecmp(b, "miss") && strcmp(CTX.handling, "hitmiss")) {
                                        CTX.hitmiss = "miss";
                                        CTX.handling = "miss";
                                } else if (!strcasecmp(b, "pass") && strcmp(CTX.handling, "hitpass")) {
                                        CTX.hitmiss = "miss";
                                        CTX.handling = "pass";
                                } else if (!strcasecmp(b, "synth")) {
                                        /* Arguably, synth isn't a hit or
                                           a miss, but miss is less
                                           wrong */
                                        CTX.hitmiss = "miss";
                                        CTX.handling = "synth";
                                } else if (!strcasecmp(b, "backend_response")) {
                                        CTX.recv_compl = 1;
                                }
                                break;
                        case SLT_VCL_return:
                                if (!strcasecmp(b, "pipe")) {
                                        CTX.hitmiss = "miss";
                                        CTX.handling = "pipe";
                                } else if (!strcasecmp(b, "restart"))
                                        skip = 1;
                                break;
                        case SLT_VCL_Log:
                                VTAILQ_FOREACH(w, &CTX.watch_vcl_log, list) {
                                        CHECK_OBJ_NOTNULL(w, WATCH_MAGIC);
                                        if (e - b < w->keylen ||
                                            strncmp(b, w->key, w->keylen))
                                                continue;
                                        p = b + w->keylen;
                                        frag_line(FMTPOL_INTERNAL, p, e, &w->frag);
                                }
                                break;
                        default:
                                break;
                        }

                        process_vsl(&CTX.watch_vsl, tag, b, e);
                }
                if (skip)
                        continue;
                i = print();
                if (i)
                        return (i);
        }

        return (0);
}

static char *
read_format(const char *formatfile)
{
        FILE *fmtfile;
        size_t len = 0;
        int fmtlen;
        char *fmt = NULL;

        fmtfile = fopen(formatfile, "r");
        if (fmtfile == NULL)
                VUT_Error(vut, 1, "Can't open format file (%s)",
                    strerror(errno));
        AN(fmtfile);
        fmtlen = getline(&fmt, &len, fmtfile);
        if (fmtlen == -1) {
                free(fmt);
                if (feof(fmtfile))
                        VUT_Error(vut, 1, "Empty format file");
                VUT_Error(vut, 1, "Can't read format from file (%s)",
                    strerror(errno));
        }
        AZ(fclose(fmtfile));
        if (fmt[fmtlen - 1] == '\n')
                fmt[fmtlen - 1] = '\0';
        return (fmt);
}

int
main(int argc, char * const *argv)
{
        signed char opt;
        char *format = NULL;
        int mode_opt = 0;

        vut = VUT_InitProg(argc, argv, &vopt_spec);
        AN(vut);
        memset(&CTX, 0, sizeof CTX);
        VTAILQ_INIT(&CTX.format);
        VTAILQ_INIT(&CTX.watch_vcl_log);
        VTAILQ_INIT(&CTX.watch_reqhdr);
        VTAILQ_INIT(&CTX.watch_resphdr);
        VTAILQ_INIT(&CTX.watch_vsl);
        CTX.vsb = VSB_new_auto();
        AN(CTX.vsb);
        CTX.quote_how = VSB_QUOTE_ESCHEX;
        REPLACE(CTX.missing_string, "-");
        REPLACE(CTX.missing_int, "-");

        tzset();                // We use localtime_r(3)

        while ((opt = getopt(argc, argv, vopt_spec.vopt_optstring)) != -1) {
                switch (opt) {
                case 'a':
                        /* Append to file */
                        CTX.a_opt = 1;
                        break;
                case 'b': /* backend mode */
                case 'c': /* client mode */
                case 'E': /* show ESI */
                        AN(VUT_Arg(vut, opt, NULL));
                        mode_opt = 1;
                        break;
                case 'F':
                        if (format != NULL)
                                VUT_Error(vut, 1, "Format already set");
                        REPLACE(format, optarg);
                        break;
                case 'f':
                        if (format != NULL)
                                VUT_Error(vut, 1, "Format already set");
                        /* Format string from file */
                        format = read_format(optarg);
                        AN(format);
                        break;
                case 'h':
                        /* Usage help */
                        VUT_Usage(vut, &vopt_spec, 0);
                        break;
                case 'j':
                        REPLACE(CTX.missing_string, "");
                        REPLACE(CTX.missing_int, "0");
                        CTX.quote_how = VSB_QUOTE_JSON;
                        break;
                case 'w':
                        /* Write to file */
                        REPLACE(CTX.w_arg, optarg);
                        break;
                default:
                        if (!VUT_Arg(vut, opt, optarg))
                                VUT_Usage(vut, &vopt_spec, 1);
                }
        }

        /* default is client mode: */
        if (!mode_opt)
                AN(VUT_Arg(vut, 'c', NULL));

        if (optind != argc)
                VUT_Usage(vut, &vopt_spec, 1);

        if (vut->D_opt && !CTX.w_arg)
                VUT_Error(vut, 1, "Missing -w option");

        if (vut->D_opt && !strcmp(CTX.w_arg, "-"))
                VUT_Error(vut, 1, "Daemon cannot write to stdout");

        /* Check for valid grouping mode */
        assert(vut->g_arg < VSL_g__MAX);
        if (vut->g_arg != VSL_g_vxid && vut->g_arg != VSL_g_request)
                VUT_Error(vut, 1, "Invalid grouping mode: %s",
                    VSLQ_grouping[vut->g_arg]);

        /* Prepare output format */
        parse_format(format);
        REPLACE(format, NULL);

        /* Setup output */
        vut->dispatch_f = dispatch_f;
        vut->dispatch_priv = NULL;
        if (CTX.w_arg) {
                openout(CTX.a_opt);
                AN(CTX.fo);
                if (vut->D_opt)
                        vut->sighup_f = rotateout;
        } else
                CTX.fo = stdout;
        vut->idle_f = flushout;

        VUT_Setup(vut);
        (void)VUT_Main(vut);
        VUT_Fini(&vut);

        exit(0);
}

		varnish-cache/bin/varnishncsa/varnishncsa.c
0		/*-
1		* Copyright (c) 2006 Verdens Gang AS
2		* Copyright (c) 2006-2016 Varnish Software AS
3		* All rights reserved.
4		*
5		* Author: Anders Berg <andersb@vgnett.no>
6		* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
7		* Author: Tollef Fog Heen <tfheen@varnish-software.com>
8		* Author: Martin Blix Grydeland <mbgrydeland@varnish-software.com>
9		*
10		* SPDX-License-Identifier: BSD-2-Clause
11		*
12		* Redistribution and use in source and binary forms, with or without
13		* modification, are permitted provided that the following conditions
14		* are met:
15		* 1. Redistributions of source code must retain the above copyright
16		* notice, this list of conditions and the following disclaimer.
17		* 2. Redistributions in binary form must reproduce the above copyright
18		* notice, this list of conditions and the following disclaimer in the
19		* documentation and/or other materials provided with the distribution.
20		*
21		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
22		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
25		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31		* SUCH DAMAGE.
32		*
33		* Obtain log data from the shared memory log, order it by session ID, and
34		* display it in Apache / NCSA combined log format.
35		*
36		* See doc/sphinx/reference/varnishncsa.rst for the supported format
37		* specifiers.
38		*
39		*/
40
41		#include "config.h"
42
43		#include <stdlib.h>
44		#include <stdio.h>
45		#include <unistd.h>
46		#include <string.h>
47		#include <signal.h>
48		#include <stdarg.h>
49		#include <inttypes.h>
50		#include <limits.h>
51		#include <ctype.h>
52		#include <time.h>
53		#include <math.h>
54
55		#define VOPT_DEFINITION
56		#define VOPT_INC "varnishncsa_options.h"
57
58		#include "vdef.h"
59
60		#include "vapi/vsl.h"
61		#include "vapi/voptget.h"
62		#include "vas.h"
63		#include "venc.h"
64		#include "vsb.h"
65		#include "vut.h"
66		#include "vqueue.h"
67		#include "miniobj.h"
68
69		#define TIME_FMT "[%d/%b/%Y:%T %z]"
70		#define FORMAT "%h %l %u %t \"%r\" %s %b \"%{Referer}i\" \"%{User-agent}i\""
71
72		static struct VUT *vut;
73
74		struct format;
75
76		enum e_frag {
77		F_H, /* %H Proto */
78		F_U, /* %U URL path */
79		F_q, /* %q Query string */
80		F_b, /* %b Body bytes sent */
81		F_h, /* %h Host name / IP Address */
82		F_m, /* %m Method */
83		F_s, /* %s Status */
84		F_I, /* %I Bytes received */
85		F_O, /* %O Bytes sent */
86		F_tstart, /* Time start */
87		F_tend, /* Time end */
88		F_ttfb, /* %{Varnish:time_firstbyte}x */
89		F_host, /* Host header */
90		F_auth, /* Authorization header */
91		F__MAX,
92		};
93
94		enum format_policy {
95		FMTPOL_INTERNAL = 1,
96		FMTPOL_REQ,
97		FMTPOL_RESP,
98		FMTPOL_FIRST,
99		FMTPOL_LAST
100		};
101
102		struct fragment {
103		uint64_t gen;
104		const char b, e;
105		};
106
107		typedef int format_f(const struct format *format);
108
109		struct format {
110		unsigned magic;
111		#define FORMAT_MAGIC 0xC3119CDA
112
113		char time_type;
114		VTAILQ_ENTRY(format) list;
115		format_f *func;
116		struct fragment *frag;
117		char *string;
118		const char const strptr;
119		char *time_fmt;
120		int64_t *int64;
121		};
122
123		struct watch {
124		unsigned magic;
125		#define WATCH_MAGIC 0xA7D4005C
126
127		VTAILQ_ENTRY(watch) list;
128		char *key;
129		int keylen;
130		struct fragment frag;
131		enum format_policy match;
132		};
133		VTAILQ_HEAD(watch_head, watch);
134
135		struct vsl_watch {
136		unsigned magic;
137		#define VSL_WATCH_MAGIC 0xE3E27D23
138
139		VTAILQ_ENTRY(vsl_watch) list;
140		enum VSL_tag_e tag;
141		int idx;
142		char *prefix;
143		int prefixlen;
144		struct fragment frag;
145		};
146		VTAILQ_HEAD(vsl_watch_head, vsl_watch);
147
148		static struct ctx {
149		/* Options */
150		int a_opt;
151		char *w_arg;
152
153		FILE *fo;
154		struct vsb *vsb;
155		uint64_t gen;
156		VTAILQ_HEAD(,format) format;
157		int quote_how;
158		char *missing_string;
159		char *missing_int;
160
161		/* State */
162		struct watch_head watch_vcl_log;
163		struct watch_head watch_reqhdr; /* also bereqhdr */
164		struct watch_head watch_resphdr; /* also beresphdr */
165		struct vsl_watch_head watch_vsl;
166		struct fragment frag[F__MAX];
167		const char *hitmiss;
168		const char *handling;
169		const char *side;
170		int64_t vxid;
171		int recv_compl;
172		} CTX;
173
174		static void parse_format(const char *format);
175
176		static unsigned
177	7505	frag_needed(const struct fragment *frag, enum format_policy fp)
178		{
179		unsigned is_first, want_first, want_frag;
180
181	7505	is_first = CTX.gen != frag->gen;
182
183	7505	switch (fp) {
184		case FMTPOL_LAST:
185	100	want_frag = 1;
186	100	want_first = 0;
187	100	break;
188		case FMTPOL_FIRST:
189		case FMTPOL_INTERNAL:
190	3795	want_first = 1;
191	3795	want_frag = 1;
192	3795	break;
193		case FMTPOL_REQ:
194	3070	want_first = *CTX.side == 'c';
195	3070	want_frag = !CTX.recv_compl;
196	3070	break;
197		case FMTPOL_RESP:
198	540	want_first = *CTX.side == 'b';
199	540	want_frag = (*CTX.side == 'c') \|\| !CTX.recv_compl;
200	540	break;
201		default:
202	0	WRONG("Invalid format policy");
203	0	}
204
205	7505	if (!want_frag)
206	290	return (0);
207	7215	if (want_first && !is_first)
208	250	return (0);
209	6965	return (1);
210	7505	}
211
212		static void
213	25	openout(int append)
214		{
215
216	25	AN(CTX.w_arg);
217	25	if (!strcmp(CTX.w_arg, "-"))
218	0	CTX.fo = stdout;
219		else
220	25	CTX.fo = fopen(CTX.w_arg, append ? "a" : "w");
221	25	if (CTX.fo == NULL)
222	10	VUT_Error(vut, 1, "Can't open output file (%s)",
223	5	strerror(errno));
224	20	}
225
226		static int v_matchproto_(VUT_cb_f)
227	5	rotateout(struct VUT *v)
228		{
229
230	5	assert(v == vut);
231	5	AN(CTX.w_arg);
232	5	AN(CTX.fo);
233	5	(void)fclose(CTX.fo);
234	5	openout(1);
235	5	AN(CTX.fo);
236	5	return (0);
237		}
238
239		static int v_matchproto_(VUT_cb_f)
240	4245	flushout(struct VUT *v)
241		{
242
243	4245	assert(v == vut);
244	4245	AN(CTX.fo);
245	4245	if (fflush(CTX.fo))
246	0	return (-5);
247	4245	return (0);
248	4245	}
249
250		static inline int
251	1270	vsb_fcat(struct vsb vsb, const struct fragment f, const char *dflt)
252		{
253	1270	if (f->gen == CTX.gen) {
254	1250	assert(f->b <= f->e);
255	1250	VSB_quote(vsb, f->b, f->e - f->b, CTX.quote_how);
256	1270	} else if (dflt)
257	20	VSB_quote(vsb, dflt, -1, CTX.quote_how);
258		else
259	0	return (-1);
260	1270	return (0);
261	1270	}
262
263		static int v_matchproto_(format_f)
264	1585	format_string(const struct format *format)
265		{
266
267	1585	CHECK_OBJ_NOTNULL(format, FORMAT_MAGIC);
268	1585	AN(format->string);
269	1585	AZ(VSB_cat(CTX.vsb, format->string));
270	1585	return (1);
271		}
272
273		static int v_matchproto_(format_f)
274	185	format_strptr(const struct format *format)
275		{
276
277	185	CHECK_OBJ_NOTNULL(format, FORMAT_MAGIC);
278	185	AN(format->strptr);
279	185	AN(*format->strptr);
280	185	AZ(VSB_cat(CTX.vsb, *format->strptr));
281	185	return (1);
282		}
283
284		static int v_matchproto_(format_f)
285	105	format_int64(const struct format *format)
286		{
287
288	105	CHECK_OBJ_NOTNULL(format, FORMAT_MAGIC);
289	105	VSB_printf(CTX.vsb, "%jd", (intmax_t)*format->int64);
290	105	return (1);
291		}
292
293		static int v_matchproto_(format_f)
294	1145	format_fragment(const struct format *format)
295		{
296
297	1145	CHECK_OBJ_NOTNULL(format, FORMAT_MAGIC);
298	1145	AN(format->frag);
299
300	1145	if (format->frag->gen != CTX.gen) {
301	240	if (format->string == NULL)
302	0	return (-1);
303	240	VSB_quote(CTX.vsb, format->string, -1, CTX.quote_how);
304	240	return (0);
305		}
306	905	AZ(vsb_fcat(CTX.vsb, format->frag, NULL));
307	905	return (1);
308	1145	}
309
310		static int v_matchproto_(format_f)
311	300	format_time(const struct format *format)
312		{
313		double t_start, t_end, d;
314		char *p;
315		char buf[64];
316		time_t t;
317		intmax_t l;
318		struct tm tm;
319
320	300	CHECK_OBJ_NOTNULL(format, FORMAT_MAGIC);
321	300	if (CTX.frag[F_tstart].gen == CTX.gen) {
322	300	t_start = strtod(CTX.frag[F_tstart].b, &p);
323	300	if (p != CTX.frag[F_tstart].e)
324	0	t_start = NAN;
325	300	} else
326	0	t_start = NAN;
327	300	if (isnan(t_start)) {
328		/* Missing t_start is a no go */
329	0	if (format->string == NULL)
330	0	return (-1);
331	0	AZ(VSB_cat(CTX.vsb, format->string));
332	0	return (0);
333		}
334
335		/* Missing t_end defaults to t_start */
336	300	if (CTX.frag[F_tend].gen == CTX.gen) {
337	295	t_end = strtod(CTX.frag[F_tend].b, &p);
338	295	if (p != CTX.frag[F_tend].e)
339	0	t_end = t_start;
340	295	} else
341	5	t_end = t_start;
342
343	300	AN(format->time_fmt);
344
345	300	switch (format->time_type) {
346		case 't':
347	150	t = (intmax_t)floor(t_start);
348	150	(void)localtime_r(&t, &tm);
349	150	AN(strftime(buf, sizeof buf, format->time_fmt, &tm));
350	150	AZ(VSB_cat(CTX.vsb, buf));
351	150	return (1);
352		case '3':
353	15	l = (intmax_t)(modf(t_start, &d) * 1e3);
354	15	break;
355		case '6':
356	15	l = (intmax_t)(modf(t_start, &d) * 1e6);
357	15	break;
358		case 'S':
359	15	l = (intmax_t)t_start;
360	15	break;
361		case 'M':
362	15	l = (intmax_t)(t_start * 1e3);
363	15	break;
364		case 'U':
365	15	l = (intmax_t)(t_start * 1e6);
366	15	break;
367		case 's':
368	30	l = (intmax_t)(t_end - t_start);
369	30	break;
370		case 'm':
371	15	l = (intmax_t)((t_end - t_start) * 1e3);
372	15	break;
373		case 'u':
374	30	l = (intmax_t)((t_end - t_start) * 1e6);
375	30	break;
376		default:
377	0	WRONG("Time format specifier");
378	0	}
379
380		#ifdef __FreeBSD__
381	150	assert(fmtcheck(format->time_fmt, "%jd") == format->time_fmt);
382		#endif
383	150	AZ(VSB_printf(CTX.vsb, format->time_fmt, l));
384
385	150	return (1);
386	300	}
387
388		static int v_matchproto_(format_f)
389	75	format_requestline(const struct format *format)
390		{
391
392	75	(void)format;
393	75	AZ(vsb_fcat(CTX.vsb, &CTX.frag[F_m], "-"));
394	75	AZ(VSB_putc(CTX.vsb, ' '));
395	75	if (CTX.frag[F_host].gen == CTX.gen) {
396	65	if (strncmp(CTX.frag[F_host].b, "http://", 7))
397	65	AZ(VSB_cat(CTX.vsb, "http://"));
398	65	AZ(vsb_fcat(CTX.vsb, &CTX.frag[F_host], NULL));
399	65	} else
400	10	AZ(VSB_cat(CTX.vsb, "http://localhost"));
401	75	AZ(vsb_fcat(CTX.vsb, &CTX.frag[F_U], ""));
402	75	AZ(vsb_fcat(CTX.vsb, &CTX.frag[F_q], ""));
403	75	AZ(VSB_putc(CTX.vsb, ' '));
404	75	AZ(vsb_fcat(CTX.vsb, &CTX.frag[F_H], "HTTP/1.0"));
405	75	return (1);
406		}
407
408		static int v_matchproto_(format_f)
409	90	format_auth(const struct format *format)
410		{
411	90	struct vsb *vsb = VSB_new_auto();
412	90	AN(vsb);
413		char *q;
414
415	90	if (CTX.frag[F_auth].gen != CTX.gen \|\|
416	40	VENC_Decode_Base64(vsb, CTX.frag[F_auth].b, CTX.frag[F_auth].e)) {
417	50	VSB_destroy(&vsb);
418	50	if (format->string == NULL)
419	0	return (-1);
420	50	VSB_quote(CTX.vsb, format->string, -1, CTX.quote_how);
421	50	return (0);
422		}
423	40	AZ(VSB_finish(vsb));
424	40	q = strchr(VSB_data(vsb), ':');
425	40	if (q != NULL)
426	40	*q = '\0';
427	40	VSB_quote(CTX.vsb, VSB_data(vsb), -1, CTX.quote_how);
428	40	VSB_destroy(&vsb);
429	40	return (1);
430	90	}
431
432		static int
433	500	print(void)
434		{
435		const struct format *f;
436	500	int i, r = 1;
437
438	500	VSB_clear(CTX.vsb);
439	3985	VTAILQ_FOREACH(f, &CTX.format, list) {
440	3485	CHECK_OBJ_NOTNULL(f, FORMAT_MAGIC);
441	3485	i = (f->func)(f);
442	3485	AZ(VSB_error(CTX.vsb));
443	3485	if (r > i)
444	130	r = i;
445	3485	}
446	500	AZ(VSB_putc(CTX.vsb, '\n'));
447	500	AZ(VSB_finish(CTX.vsb));
448	500	if (r >= 0) {
449	500	i = fwrite(VSB_data(CTX.vsb), 1, VSB_len(CTX.vsb), CTX.fo);
450	500	if (i != VSB_len(CTX.vsb))
451	0	return (-5);
452	500	}
453	500	return (0);
454	500	}
455
456		static void
457	1190	addf_string(const char *str)
458		{
459		struct format *f;
460
461	1190	AN(str);
462	1190	ALLOC_OBJ(f, FORMAT_MAGIC);
463	1190	AN(f);
464	1190	f->func = format_string;
465	1190	f->string = strdup(str);
466	1190	AN(f->string);
467	1190	VTAILQ_INSERT_TAIL(&CTX.format, f, list);
468	1190	}
469
470		static void
471	40	addf_strptr(const char const strptr)
472		{
473		struct format *f;
474
475	40	AN(strptr);
476	40	ALLOC_OBJ(f, FORMAT_MAGIC);
477	40	AN(f);
478	40	f->func = format_strptr;
479	40	f->strptr = strptr;
480	40	VTAILQ_INSERT_TAIL(&CTX.format, f, list);
481	40	}
482
483		static void
484	495	addf_fragment(struct fragment frag, const char str)
485		{
486		struct format *f;
487
488	495	AN(frag);
489	495	ALLOC_OBJ(f, FORMAT_MAGIC);
490	495	AN(f);
491	495	f->func = format_fragment;
492	495	f->frag = frag;
493	495	if (str != NULL) {
494	495	f->string = strdup(str);
495	495	AN(f->string);
496	495	}
497	495	VTAILQ_INSERT_TAIL(&CTX.format, f, list);
498	495	}
499