diff options
Diffstat (limited to '')
| -rw-r--r-- | Makefile | 8 | ||||
| -rw-r--r-- | slowcgi.8 | 63 | ||||
| -rw-r--r-- | slowcgi.c | 1030 |
3 files changed, 1101 insertions, 0 deletions
diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..e09a600 --- /dev/null +++ b/Makefile @@ -0,0 +1,8 @@ +# $OpenBSD: Makefile,v 1.1 2013/05/23 12:03:24 florian Exp $ + +PROG= slowcgi +SRCS= slowcgi.c +LDADD= -levent +DPADD= ${LIBEVENT} +MAN= slowcgi.8 +.include <bsd.prog.mk> diff --git a/slowcgi.8 b/slowcgi.8 new file mode 100644 index 0000000..836a9a0 --- /dev/null +++ b/slowcgi.8 @@ -0,0 +1,63 @@ +.\" $OpenBSD: slowcgi.8,v 1.1 2013/05/23 12:03:24 florian Exp $ +.\" +.\" Copyright (c) 2013 Florian Obser <florian@openbsd.org> +.\" +.\" 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. +.\" +.Dd $Mdocdate: May 23 2013 $ +.Dt SLOWCGI 8 +.Os +.Sh NAME +.Nm slowcgi +.Nd a FastCGI to CGI wrapper server +.Sh SYNOPSIS +.Nm +.Op Fl d +.Sh DESCRIPTION +.Nm +is a server which implements the FastCGI Protocol to execute CGI scripts. +.Pp +.Nm +opens a socket at +.Ar /var/www/logs/slowcgi.sock +owned by +.Ar root:www +and permissions +.Ar 0660. +It then +.Xr chroot 8 +to +.Ar /var/www. +.Pp +The options are as follows: +.Bl -tag -width Ds +.It Fl d +Do not daemonize. +If this option is specified, +.Nm +will run in the foreground and log to stderr. +.El +.\" .Sh SEE ALSO +.Sh STANDARDS +.Rs +.%A Mark R. Brown +.%D April 1996 +.%T FastCGI Specification +.Re +.Pp +.Rs +.%A D. Robinson, K. Coar +.%D October 2004 +.%R RFC 3875 +.%T The Common Gateway Interface (CGI) Version 1.1 +.Re diff --git a/slowcgi.c b/slowcgi.c new file mode 100644 index 0000000..2bdc72b --- /dev/null +++ b/slowcgi.c @@ -0,0 +1,1030 @@ +/* $OpenBSD: slowcgi.c,v 1.1 2013/05/23 12:03:24 florian Exp $ */ +/* + * Copyright (c) 2013 David Gwynne <dlg@openbsd.org> + * Copyright (c) 2013 Florian Obser <florian@openbsd.org> + * + * 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/ioctl.h> +#include <sys/queue.h> +#include <sys/socket.h> +#include <sys/socketvar.h> +#include <sys/stat.h> +#include <sys/un.h> +#include <sys/wait.h> +#include <err.h> +#include <ctype.h> +#include <errno.h> +#include <event.h> +#include <netdb.h> +#include <pwd.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <syslog.h> +#include <unistd.h> + +#define TIMEOUT_DEFAULT 120 +#define SLOWCGI_USER "www" +#define FCGI_RECORD_SIZE 64*1024 +#define STDOUT_DONE 1 +#define STDERR_DONE 2 +#define SCRIPT_DONE 4 + +#define FCGI_BEGIN_REQUEST 1 +#define FCGI_ABORT_REQUEST 2 +#define FCGI_END_REQUEST 3 +#define FCGI_PARAMS 4 +#define FCGI_STDIN 5 +#define FCGI_STDOUT 6 +#define FCGI_STDERR 7 +#define FCGI_DATA 8 +#define FCGI_GET_VALUES 9 +#define FCGI_GET_VALUES_RESULT 10 +#define FCGI_UNKNOWN_TYPE 11 +#define FCGI_MAXTYPE (FCGI_UNKNOWN_TYPE) + +#define FCGI_REQUEST_COMPLETE 0 +#define FCGI_CANT_MPX_CONN 1 +#define FCGI_OVERLOADED 2 +#define FCGI_UNKNOWN_ROLE 3 + + +struct listener { + struct event ev, pause; +}; + +struct env_val { + SLIST_ENTRY(env_val) entry; + char *val; +}; +SLIST_HEAD(env_head, env_val); + +struct fcgi_record_header { + uint8_t version; + uint8_t type; + uint16_t id; + uint16_t content_len; + uint8_t padding_len; + uint8_t reserved; +}__packed; + +struct fcgi_response { + TAILQ_ENTRY(fcgi_response) entry; + uint8_t data[FCGI_RECORD_SIZE + sizeof(struct + fcgi_record_header)]; + size_t data_pos; + size_t data_len; +}; +TAILQ_HEAD(fcgi_response_head, fcgi_response); + +struct fcgi_stdin { + TAILQ_ENTRY(fcgi_stdin) entry; + uint8_t data[FCGI_RECORD_SIZE]; + size_t data_pos; + size_t data_len; +}; +TAILQ_HEAD(fcgi_stdin_head, fcgi_stdin); + +struct client { + struct event ev; + struct event resp_ev; + struct event tmo; + int fd; + uint8_t buf[FCGI_RECORD_SIZE]; + size_t buf_pos; + size_t buf_len; + struct fcgi_response_head response_head; + struct fcgi_stdin_head stdin_head; + uint16_t id; + char script_name[MAXPATHLEN]; + struct env_head env; + int env_count; + pid_t script_pid; + int script_status; + struct event script_ev; + struct event script_err_ev; + struct event script_stdin_ev; + uint8_t script_flags; + uint8_t request_started; +}; + +struct clients { + SLIST_ENTRY(clients) entry; + struct client *client; +}; +SLIST_HEAD(clients_head, clients); + +struct slowcgi_proc { + struct clients_head clients; + struct event ev_sigchld; + struct event ev_sigpipe; +}; + +struct fcgi_begin_request_body { + uint16_t role; + uint8_t flags; + uint8_t reserved[5]; +}__packed; + +struct fcgi_end_request { + uint32_t app_status; + uint8_t protocol_status; + uint8_t reserved[3]; +}__packed; +__dead void usage(void); +void slowcgi_listen(const char *, gid_t); +void slowcgi_paused(int, short, void*); +void slowcgi_accept(int, short, void*); +void slowcgi_request(int, short, void*); +void slowcgi_response(int, short, void*); +void slowcgi_timeout(int, short, void*); +void slowcgi_sig_handler(int, short, void*); +size_t parse_request(uint8_t* , size_t, struct client*); +void parse_begin_request(uint8_t*, uint16_t, struct client*, + uint16_t); +void parse_params(uint8_t*, uint16_t, struct client*, uint16_t); +void parse_stdin(uint8_t*, uint16_t, struct client*, uint16_t); +void exec_cgi(struct client*); +void script_in(int, struct event*, struct client*, uint8_t); +void script_std_in(int, short, void*); +void script_err_in(int, short, void*); +void script_out(int, short, void*); +void create_end_request(struct client*); +void dump_fcgi_record_header(const char*, + struct fcgi_record_header*); +void cleanup_client(struct client*); +struct loggers { + void (*err)(int, const char *, ...); + void (*errx)(int, const char *, ...); + void (*warn)(const char *, ...); + void (*warnx)(const char *, ...); + void (*info)(const char *, ...); + void (*debug)(const char *, ...); +}; + +const struct loggers conslogger = { + err, + errx, + warn, + warnx, + warnx, /* info */ + warnx /* debug */ +}; + +void syslog_err(int, const char *, ...); +void syslog_errx(int, const char *, ...); +void syslog_warn(const char *, ...); +void syslog_warnx(const char *, ...); +void syslog_info(const char *, ...); +void syslog_debug(const char *, ...); +void syslog_vstrerror(int, int, const char *, va_list); + +const struct loggers syslogger = { + syslog_err, + syslog_errx, + syslog_warn, + syslog_warnx, + syslog_info, + syslog_debug +}; + +const struct loggers *logger = &conslogger; + +#define lerr(_e, _f...) logger->err((_e), _f) +#define lerrx(_e, _f...) logger->errx((_e), _f) +#define lwarn(_f...) logger->warn(_f) +#define lwarnx(_f...) logger->warnx(_f) +#define linfo(_f...) logger->info(_f) +#define ldebug(_f...) logger->debug(_f) + +__dead void +usage(void) +{ + extern char *__progname; + fprintf(stderr, "usage: %s [-d]\n", __progname); + exit(1); +} + +struct timeval timeout = { TIMEOUT_DEFAULT, 0 }; +struct slowcgi_proc slowcgi_proc; +int debug = 0; +int on = 1; + +int +main(int argc, char *argv[]) +{ + struct passwd *pw; + int c; + + while ((c = getopt(argc, argv, "d")) != -1) { + switch (c) { + case 'd': + debug = 1; + break; + default: + usage(); + /* NOTREACHED */ + } + } + + if (geteuid() != 0) + errx(1, "need root privileges"); + + pw = getpwnam(SLOWCGI_USER); + if (pw == NULL) + err(1, "no %s user", SLOWCGI_USER); + + if (!debug && daemon(1, 0) == -1) + err(1, "daemon"); + + event_init(); + + slowcgi_listen("/var/www/logs/slowcgi.sock", pw->pw_gid); + if (chroot(pw->pw_dir) == -1) + lerr(1, "chroot(%s)", pw->pw_dir); + + if (chdir("/") == -1) + lerr(1, "chdir(%s)", pw->pw_dir); + + if (setgroups(1, &pw->pw_gid) || + setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) || + setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid)) + lerr(1, "unable to revoke privs"); + + SLIST_INIT(&slowcgi_proc.clients); + + signal_set(&slowcgi_proc.ev_sigchld, SIGCHLD, slowcgi_sig_handler, + &slowcgi_proc); + signal_set(&slowcgi_proc.ev_sigpipe, SIGPIPE, slowcgi_sig_handler, + &slowcgi_proc); + + signal_add(&slowcgi_proc.ev_sigchld, NULL); + signal_add(&slowcgi_proc.ev_sigpipe, NULL); + + event_dispatch(); + return (0); +} +void +slowcgi_listen(const char *path, gid_t gid) +{ + struct listener *l = NULL; + struct sockaddr_un sun; + mode_t old_umask, mode; + int fd; + + if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) + lerr(1, "slowcgi_listen: socket"); + + bzero(&sun, sizeof(sun)); + sun.sun_family = AF_UNIX; + strlcpy(sun.sun_path, path, sizeof(sun.sun_path)); + + if (unlink(path) == -1) + if (errno != ENOENT) + lerr(1, "slowcgi_listen: unlink %s", path); + + old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH); + mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP; + + if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) + lerr(1,"slowcgi_listen: bind: %s", path); + + umask(old_umask); + + if (chmod(path, mode) == -1) + lerr(1, "slowcgi_listen: chmod: %s", path); + + if (chown(path, 0, gid) == -1) + lerr(1, "slowcgi_listen: chown: %s", path); + + if (ioctl(fd, FIONBIO, &on) == -1) + lerr(1, "listener ioctl(FIONBIO)"); + + if (listen(fd, 5) == -1) + lerr(1, "listen"); + + l = calloc(1, sizeof(*l)); + if (l == NULL) + lerr(1, "listener ev alloc"); + + event_set(&l->ev, fd, EV_READ | EV_PERSIST, slowcgi_accept, l); + event_add(&l->ev, NULL); + evtimer_set(&l->pause, slowcgi_paused, l); +} + +void +slowcgi_paused(int fd, short events, void *arg) +{ + struct listener *l = arg; + event_add(&l->ev, NULL); +} + +void +slowcgi_accept(int fd, short events, void *arg) +{ + struct listener *l; + struct sockaddr_storage ss; + struct timeval pause; + struct client *c; + struct clients *clients; + socklen_t len; + int s; + + l = arg; + pause.tv_sec = 1; pause.tv_usec = 0; + c = NULL; + + len = sizeof(ss); + s = accept(fd, (struct sockaddr *)&ss, &len); + if (s == -1) { + switch (errno) { + case EINTR: + case EWOULDBLOCK: + case ECONNABORTED: + return; + case EMFILE: + case ENFILE: + event_del(&l->ev); + evtimer_add(&l->pause, &pause); + return; + default: + lerr(1, "accept"); + } + } + + if (ioctl(s, FIONBIO, &on) == -1) + lerr(1, "client ioctl(FIONBIO)"); + + c = calloc(1, sizeof(*c)); + if (c == NULL) { + lwarn("cannot calloc client"); + close(s); + return; + } + clients = calloc(1, sizeof(*clients)); + if (c == NULL) { + lwarn("cannot calloc clients"); + close(s); + free(c); + return; + } + c->fd = s; + c->buf_pos = 0; + c->buf_len = 0; + c->request_started = 0; + TAILQ_INIT(&c->response_head); + TAILQ_INIT(&c->stdin_head); + + event_set(&c->ev, s, EV_READ | EV_PERSIST, slowcgi_request, c); + event_add(&c->ev, NULL); + + event_set(&c->tmo, s, 0, slowcgi_timeout, c); + event_add(&c->tmo, &timeout); + clients->client = c; + SLIST_INSERT_HEAD(&slowcgi_proc.clients, clients, entry); +} + +void +slowcgi_timeout(int fd, short events, void *arg) +{ + cleanup_client((struct client*) arg); +} + +void +slowcgi_sig_handler(int sig, short event, void *arg) +{ + struct client *c; + struct clients *ncs; + struct slowcgi_proc *p; + pid_t pid; + int status; + + p = arg; + c = NULL; + + switch (sig) { + case SIGCHLD: + pid = wait(&status); + SLIST_FOREACH(ncs, &p->clients, entry) + if (ncs->client->script_pid == pid) { + c = ncs->client; + break; + } + if (c != NULL) { + c->script_status = WEXITSTATUS(status); + if (c->script_flags == (STDOUT_DONE | STDERR_DONE)) + create_end_request(c); + c->script_flags |= SCRIPT_DONE; + } + case SIGPIPE: + /* ignore */ + break; + default: + lerr(1, "unexpected signal: %d", sig); + + } +} + +void +slowcgi_response(int fd, short events, void *arg) +{ + struct client *c; + struct fcgi_record_header *header; + struct fcgi_response *resp; + ssize_t n; + + c = arg; + + while ((resp = TAILQ_FIRST(&c->response_head))) { + header = (struct fcgi_record_header*) resp->data; + if (debug) + dump_fcgi_record_header("resp ", header); + + n = write(fd, resp->data + resp->data_pos, resp->data_len); + if ( n == -1) { + if (errno == EAGAIN) + return; + cleanup_client(c); + return; + } + resp->data_pos += n; + resp->data_len -= n; + if(resp->data_len == 0) { + TAILQ_REMOVE(&c->response_head, resp, entry); + free(resp); + } + } + + if (TAILQ_EMPTY(&c->response_head)) { + if (c->script_flags == (STDOUT_DONE | STDERR_DONE | + SCRIPT_DONE)) + cleanup_client(c); + else + event_del(&c->resp_ev); + } +} + +void +slowcgi_request(int fd, short events, void *arg) +{ + struct client *c; + size_t n, parsed; + + c = arg; + parsed = 0; + + n = read(fd, c->buf+c->buf_pos+c->buf_len, + FCGI_RECORD_SIZE - c->buf_pos-c->buf_len); + + switch (n) { + case -1: + switch (errno) { + case EINTR: + case EAGAIN: + return; + default: + goto fail; + } + break; + + case 0: + ldebug("closed connection"); + goto fail; + default: + break; + } + + c->buf_len+=n; + + do { + parsed = parse_request(c->buf+c->buf_pos, c->buf_len, c); + c->buf_pos += parsed; + c->buf_len -= parsed; + } while (parsed > 0 && c->buf_len > 0); + + if (c->buf_len > 0) { + bcopy(c->buf+c->buf_pos, c->buf, c->buf_len); + c->buf_pos = 0; + } + return; +fail: + cleanup_client(c); +} + +void +parse_begin_request(uint8_t *buf, uint16_t n, struct client *c, uint16_t id) +{ + struct fcgi_begin_request_body *b; + + if (c->request_started) { + lwarnx("unexpected FCGI_BEGIN_REQUEST, ignoring"); + return; + } + + if (n != sizeof(struct fcgi_begin_request_body)) { + lwarnx("wrong size %d != %d", n, + sizeof(struct fcgi_begin_request_body)); + return; + } + + c->request_started = 1; + b = (struct fcgi_begin_request_body*) buf; + + c->id = id; + SLIST_INIT(&c->env); + c->env_count = 0; +} +void +parse_params(uint8_t *buf, uint16_t n, struct client *c, uint16_t id) +{ + struct env_val *env_entry; + uint32_t name_len, val_len; + + if (!c->request_started) { + lwarnx("FCGI_PARAMS without FCGI_BEGIN_REQUEST, ignoring"); + return; + } + + if (c->id != id) { + lwarnx("unexpected id, ignoring"); + return; + } + + name_len = val_len = 0; + + if (n == 0) { + exec_cgi(c); + return; + } + while (n > 0) { + if (buf[0] >> 7 == 0) { + name_len = buf[0]; + n--; + buf++; + } else { + if (n > 3) { + name_len = ((buf[3] & 0x7f) << 24) + + (buf[2] << 16) + (buf[1] << 8) + buf[0]; + n -= 4; + buf += 4; + } else + return; + } + + if (n > 0) { + if (buf[0] >> 7 == 0) { + val_len = buf[0]; + n--; + buf++; + } else { + if (n > 3) { + val_len = ((buf[3] & 0x7f) << 24) + + (buf[2] << 16) + (buf[1] << 8) + + buf[0]; + n -= 4; + buf += 4; + } else + return; + } + } + if (n < name_len + val_len) + return; + + if ((env_entry = malloc(sizeof(struct env_val))) == NULL) { + lwarnx("cannot allocate env_entry"); + return; + } + + if ((env_entry->val = calloc(sizeof(char), name_len + val_len + + 2)) == NULL) { + lwarnx("cannot allocate env_entry->val"); + free(env_entry); + return; + } + + bcopy(buf, env_entry->val, name_len); + buf += name_len; n -= name_len; + + env_entry->val[name_len] = '\0'; + if (val_len < MAXPATHLEN && strcmp(env_entry->val, + "SCRIPT_NAME") == 0) { + bcopy(buf, c->script_name, val_len); + c->script_name[val_len+1] = '\0'; + } + env_entry->val[name_len] = '='; + + bcopy(buf, (env_entry->val)+name_len+1, val_len); + buf += val_len; n -= val_len; + + SLIST_INSERT_HEAD(&c->env, env_entry, entry); + c->env_count++; + } +} + +void +parse_stdin(uint8_t *buf, uint16_t n, struct client *c, uint16_t id) +{ + struct fcgi_stdin *node; + + if (c->id != id) { + lwarnx("unexpected id, ignoring"); + return; + } + + if ((node = calloc(1, sizeof(struct fcgi_stdin))) == NULL) { + lwarnx("cannot calloc stdin node"); + return; + } + + bcopy(buf, node->data, n); + node->data_pos = 0; + node->data_len = n; + + TAILQ_INSERT_TAIL(&c->stdin_head, node, entry); + + event_del(&c->script_stdin_ev); + event_set(&c->script_stdin_ev, EVENT_FD(&c->script_ev), EV_WRITE | + EV_PERSIST, script_out, c); + event_add(&c->script_stdin_ev, NULL); + +} + +size_t +parse_request(uint8_t *buf, size_t n, struct client *c) +{ + struct fcgi_record_header *h; + + if (n < sizeof(struct fcgi_record_header)) + return (0); + + h = (struct fcgi_record_header*) buf; + + if (debug) + dump_fcgi_record_header("", h); + + if (n < sizeof(struct fcgi_record_header) + ntohs(h->content_len) + + h->padding_len) + return (0); + + if (h->version != 1) + lerrx(1, "wrong version"); + + switch (h->type) { + case FCGI_BEGIN_REQUEST: + parse_begin_request(buf+sizeof(struct fcgi_record_header), + ntohs(h->content_len), c, ntohs(h->id)); + break; + case FCGI_PARAMS: + parse_params(buf+sizeof(struct fcgi_record_header), + ntohs(h->content_len), c, ntohs(h->id)); + break; + case FCGI_STDIN: + parse_stdin(buf+sizeof(struct fcgi_record_header), + ntohs(h->content_len), c, ntohs(h->id)); + break; + default: + lwarnx("unimplemented type %d", h->type); + } + + return (sizeof(struct fcgi_record_header) + ntohs(h->content_len) + + h->padding_len); +} + +void +exec_cgi(struct client *c) +{ + struct env_val *env_entry; + int s[2], s_err[2], i; + pid_t pid; + char *argv[2]; + char **env; + + i = 0; + + if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, s) == -1) + lerr(1, "socketpair"); + if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, s_err) == -1) + lerr(1, "socketpair"); + ldebug("fork: %s", c->script_name); + switch(pid = fork()) { + case -1: + lwarn("fork"); + return; + case 0: + /* Child process */ + close(s[0]); + close(s_err[0]); + if (dup2(s[1], STDIN_FILENO) == -1) + _exit(1); + if (dup2(s[1], STDOUT_FILENO) == -1) + _exit(1); + if (dup2(s_err[1], STDERR_FILENO) == -1) + _exit(1); + argv[0] = c->script_name; + argv[1] = NULL; + if((env = calloc(c->env_count+1, sizeof(char*)))==NULL) + _exit(1); + SLIST_FOREACH(env_entry, &c->env, entry) + env[i++] = env_entry->val; + env[i++] = NULL; + execve(c->script_name, argv, env); + _exit(1); + + } + /* Parent process*/ + close(s[1]); + close(s_err[1]); + if (ioctl(s[0], FIONBIO, &on) == -1) + lerr(1, "script ioctl(FIONBIO)"); + if (ioctl(s_err[0], FIONBIO, &on) == -1) + lerr(1, "script ioctl(FIONBIO)"); + + c->script_pid = pid; + event_set(&c->script_ev, s[0], EV_READ | EV_PERSIST, script_std_in, c); + event_add(&c->script_ev, NULL); + event_set(&c->script_err_ev, s_err[0], EV_READ | EV_PERSIST, + script_err_in, c); + event_add(&c->script_err_ev, NULL); +} + +void +create_end_request(struct client *c) +{ + struct fcgi_response *resp; + struct fcgi_record_header *header; + struct fcgi_end_request *end_request; + + if ((resp = malloc(sizeof(struct fcgi_response))) == NULL) { + lwarnx("cannot malloc fcgi_response"); + return; + } + header = (struct fcgi_record_header*) resp->data; + header->version = 1; + header->type = FCGI_END_REQUEST; + header->id = htons(c->id); + header->content_len = htons(sizeof(struct + fcgi_end_request)); + header->padding_len = 0; + header->reserved = 0; + end_request = (struct fcgi_end_request *) resp->data + + sizeof(struct fcgi_record_header); + end_request->app_status = htonl(c->script_status); + end_request->protocol_status = FCGI_REQUEST_COMPLETE; + resp->data_pos = 0; + resp->data_len = sizeof(struct fcgi_end_request) + + sizeof(struct fcgi_record_header); + TAILQ_INSERT_TAIL(&c->response_head, resp, entry); +} + +void +script_in(int fd, struct event *ev, struct client *c, uint8_t type) +{ + struct fcgi_response *resp; + struct fcgi_record_header *header; + ssize_t n; + + if ((resp = malloc(sizeof(struct fcgi_response))) == NULL) { + lwarnx("cannot malloc fcgi_response"); + return; + } + header = (struct fcgi_record_header*) resp->data; + header->version = 1; + header->type = type; + header->id = htons(c->id); + header->padding_len = 0; + header->reserved = 0; + + n = read(fd, resp->data + sizeof(struct fcgi_record_header), + FCGI_RECORD_SIZE); + + if (n == -1) { + switch (errno) { + case EINTR: + case EAGAIN: + return; + default: + n = 0; /* fake empty FCGI_STD{OUT,ERR} response */ + } + } + header->content_len = htons(n); + resp->data_pos = 0; + resp->data_len = n + sizeof(struct fcgi_record_header); + TAILQ_INSERT_TAIL(&c->response_head, resp, entry); + + event_del(&c->resp_ev); + event_set(&c->resp_ev, EVENT_FD(&c->ev), EV_WRITE | EV_PERSIST, + slowcgi_response, c); + event_add(&c->resp_ev, NULL); + + if (n == 0) { + if (type == FCGI_STDOUT) + c->script_flags |= STDOUT_DONE; + else + c->script_flags |= STDERR_DONE; + + if (c->script_flags == (STDOUT_DONE | STDERR_DONE | + SCRIPT_DONE)) { + create_end_request(c); + } + event_del(ev); + close(fd); + } +} + +void +script_std_in(int fd, short events, void *arg) +{ + struct client *c = arg; + script_in(fd, &c->script_ev, c, FCGI_STDOUT); +} + +void +script_err_in(int fd, short events, void *arg) +{ + struct client *c = arg; + script_in(fd, &c->script_err_ev, c, FCGI_STDERR); +} + +void +script_out(int fd, short events, void *arg) +{ + struct client *c; + struct fcgi_stdin *node; + ssize_t n; + + c = arg; + + while ((node = TAILQ_FIRST(&c->stdin_head))) { + if (node->data_len == 0) { /* end of stdin marker */ + shutdown(fd, SHUT_WR); + break; + } + n = write(fd, node->data + node->data_pos, node->data_len); + if ( n == -1) { + if (errno == EAGAIN) + return; + event_del(&c->script_stdin_ev); + return; + } + node->data_pos += n; + node->data_len -= n; + if(node->data_len == 0) { + TAILQ_REMOVE(&c->stdin_head, node, entry); + free(node); + } + } +} + +void +cleanup_client(struct client *c) +{ + struct fcgi_response *resp; + struct fcgi_stdin *stdin_node; + struct env_val *env_entry; + struct clients *ncs, *tcs; + + evtimer_del(&c->tmo); + if (event_initialized(&c->ev)) + event_del(&c->ev); + if (event_initialized(&c->resp_ev)) + event_del(&c->resp_ev); + if (event_initialized(&c->script_ev)) { + close(EVENT_FD(&c->script_ev)); + event_del(&c->script_ev); + } + if (event_initialized(&c->script_err_ev)) { + close(EVENT_FD(&c->script_err_ev)); + event_del(&c->script_err_ev); + } + if (event_initialized(&c->script_stdin_ev)) { + close(EVENT_FD(&c->script_stdin_ev)); + event_del(&c->script_stdin_ev); + } + close(c->fd); + while (!SLIST_EMPTY(&c->env)) { + env_entry = SLIST_FIRST(&c->env); + SLIST_REMOVE_HEAD(&c->env, entry); + free(env_entry->val); + free(env_entry); + } + + while ((resp = TAILQ_FIRST(&c->response_head))) { + TAILQ_REMOVE(&c->response_head, resp, entry); + free(resp); + } + while ((stdin_node = TAILQ_FIRST(&c->stdin_head))) { + TAILQ_REMOVE(&c->stdin_head, stdin_node, entry); + free(stdin_node); + } + SLIST_FOREACH_SAFE(ncs, &slowcgi_proc.clients, entry, tcs) { + if(ncs->client == c) { + SLIST_REMOVE(&slowcgi_proc.clients, ncs, clients, + entry); + free(ncs); + break; + } + } + free(c); +} + +void dump_fcgi_record_header(const char* p, struct fcgi_record_header *h) +{ + ldebug("%sversion: %d", p, h->version); + ldebug("%stype: %d", p, h->type); + ldebug("%srequestId: %d", p, ntohs(h->id)); + ldebug("%scontentLength: %d", p, ntohs(h->content_len)); + ldebug("%spaddingLength: %d", p, h->padding_len); + ldebug("%sreserved: %d", p, h->reserved); +} + +void +syslog_vstrerror(int e, int priority, const char *fmt, va_list ap) +{ + char *s; + + if (vasprintf(&s, fmt, ap) == -1) { + syslog(LOG_EMERG, "unable to alloc in syslog_vstrerror"); + exit(1); + } + syslog(priority, "%s: %s", s, strerror(e)); + free(s); +} + +void +syslog_err(int ecode, const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + syslog_vstrerror(errno, LOG_EMERG, fmt, ap); + va_end(ap); + exit(ecode); +} + +void +syslog_errx(int ecode, const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + vsyslog(LOG_WARNING, fmt, ap); + va_end(ap); + exit(ecode); +} + +void +syslog_warn(const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + syslog_vstrerror(errno, LOG_WARNING, fmt, ap); + va_end(ap); +} + +void +syslog_warnx(const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + vsyslog(LOG_WARNING, fmt, ap); + va_end(ap); +} + +void +syslog_info(const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + vsyslog(LOG_INFO, fmt, ap); + va_end(ap); +} + +void +syslog_debug(const char *fmt, ...) +{ + va_list ap; + + if (!debug) + return; + + va_start(ap, fmt); + vsyslog(LOG_DEBUG, fmt, ap); + va_end(ap); +} |