mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-20 11:11:24 +00:00
392 lines
8.7 KiB
C
392 lines
8.7 KiB
C
/*-
|
|
* Copyright (c) 1998 Dag-Erling Coïdan Smørgrav
|
|
* All rights reserved.
|
|
*
|
|
* 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
|
|
* in this position and unchanged.
|
|
* 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.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/time.h>
|
|
#include <sys/uio.h>
|
|
#include <netinet/in.h>
|
|
|
|
#include <errno.h>
|
|
#include <netdb.h>
|
|
#include <stdarg.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "fetch.h"
|
|
#include "common.h"
|
|
|
|
|
|
/*** Local data **************************************************************/
|
|
|
|
/*
|
|
* Error messages for resolver errors
|
|
*/
|
|
static struct fetcherr _netdb_errlist[] = {
|
|
{ EAI_NODATA, FETCH_RESOLV, "Host not found" },
|
|
{ EAI_AGAIN, FETCH_TEMP, "Transient resolver failure" },
|
|
{ EAI_FAIL, FETCH_RESOLV, "Non-recoverable resolver failure" },
|
|
{ EAI_NONAME, FETCH_RESOLV, "No address record" },
|
|
{ -1, FETCH_UNKNOWN, "Unknown resolver error" }
|
|
};
|
|
|
|
/* End-of-Line */
|
|
static const char ENDL[2] = "\r\n";
|
|
|
|
|
|
/*** Error-reporting functions ***********************************************/
|
|
|
|
/*
|
|
* Map error code to string
|
|
*/
|
|
static struct fetcherr *
|
|
_fetch_finderr(struct fetcherr *p, int e)
|
|
{
|
|
while (p->num != -1 && p->num != e)
|
|
p++;
|
|
return p;
|
|
}
|
|
|
|
/*
|
|
* Set error code
|
|
*/
|
|
void
|
|
_fetch_seterr(struct fetcherr *p, int e)
|
|
{
|
|
p = _fetch_finderr(p, e);
|
|
fetchLastErrCode = p->cat;
|
|
snprintf(fetchLastErrString, MAXERRSTRING, "%s", p->string);
|
|
}
|
|
|
|
/*
|
|
* Set error code according to errno
|
|
*/
|
|
void
|
|
_fetch_syserr(void)
|
|
{
|
|
int e;
|
|
e = errno;
|
|
|
|
switch (errno) {
|
|
case 0:
|
|
fetchLastErrCode = FETCH_OK;
|
|
break;
|
|
case EPERM:
|
|
case EACCES:
|
|
case EROFS:
|
|
case EAUTH:
|
|
case ENEEDAUTH:
|
|
fetchLastErrCode = FETCH_AUTH;
|
|
break;
|
|
case ENOENT:
|
|
case EISDIR: /* XXX */
|
|
fetchLastErrCode = FETCH_UNAVAIL;
|
|
break;
|
|
case ENOMEM:
|
|
fetchLastErrCode = FETCH_MEMORY;
|
|
break;
|
|
case EBUSY:
|
|
case EAGAIN:
|
|
fetchLastErrCode = FETCH_TEMP;
|
|
break;
|
|
case EEXIST:
|
|
fetchLastErrCode = FETCH_EXISTS;
|
|
break;
|
|
case ENOSPC:
|
|
fetchLastErrCode = FETCH_FULL;
|
|
break;
|
|
case EADDRINUSE:
|
|
case EADDRNOTAVAIL:
|
|
case ENETDOWN:
|
|
case ENETUNREACH:
|
|
case ENETRESET:
|
|
case EHOSTUNREACH:
|
|
fetchLastErrCode = FETCH_NETWORK;
|
|
break;
|
|
case ECONNABORTED:
|
|
case ECONNRESET:
|
|
fetchLastErrCode = FETCH_ABORT;
|
|
break;
|
|
case ETIMEDOUT:
|
|
fetchLastErrCode = FETCH_TIMEOUT;
|
|
break;
|
|
case ECONNREFUSED:
|
|
case EHOSTDOWN:
|
|
fetchLastErrCode = FETCH_DOWN;
|
|
break;
|
|
default:
|
|
fetchLastErrCode = FETCH_UNKNOWN;
|
|
}
|
|
snprintf(fetchLastErrString, MAXERRSTRING, "%s", strerror(e));
|
|
}
|
|
|
|
|
|
/*
|
|
* Emit status message
|
|
*/
|
|
void
|
|
_fetch_info(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
fputc('\n', stderr);
|
|
}
|
|
|
|
|
|
/*** Network-related utility functions ***************************************/
|
|
|
|
/*
|
|
* Return the default port for a scheme
|
|
*/
|
|
int
|
|
_fetch_default_port(const char *scheme)
|
|
{
|
|
struct servent *se;
|
|
|
|
if ((se = getservbyname(scheme, "tcp")) != NULL)
|
|
return ntohs(se->s_port);
|
|
if (strcasecmp(scheme, SCHEME_FTP) == 0)
|
|
return FTP_DEFAULT_PORT;
|
|
if (strcasecmp(scheme, SCHEME_HTTP) == 0)
|
|
return HTTP_DEFAULT_PORT;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Return the default proxy port for a scheme
|
|
*/
|
|
int
|
|
_fetch_default_proxy_port(const char *scheme)
|
|
{
|
|
if (strcasecmp(scheme, SCHEME_FTP) == 0)
|
|
return FTP_DEFAULT_PROXY_PORT;
|
|
if (strcasecmp(scheme, SCHEME_HTTP) == 0)
|
|
return HTTP_DEFAULT_PROXY_PORT;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Establish a TCP connection to the specified port on the specified host.
|
|
*/
|
|
int
|
|
_fetch_connect(const char *host, int port, int af, int verbose)
|
|
{
|
|
char pbuf[10];
|
|
struct addrinfo hints, *res, *res0;
|
|
int sd, err;
|
|
|
|
DEBUG(fprintf(stderr, "\033[1m---> %s:%d\033[m\n", host, port));
|
|
|
|
if (verbose)
|
|
_fetch_info("looking up %s", host);
|
|
|
|
/* look up host name and set up socket address structure */
|
|
snprintf(pbuf, sizeof(pbuf), "%d", port);
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = af;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = 0;
|
|
if ((err = getaddrinfo(host, pbuf, &hints, &res0)) != 0) {
|
|
_netdb_seterr(err);
|
|
return -1;
|
|
}
|
|
|
|
if (verbose)
|
|
_fetch_info("connecting to %s:%d", host, port);
|
|
|
|
/* try to connect */
|
|
for (sd = -1, res = res0; res; res = res->ai_next) {
|
|
if ((sd = socket(res->ai_family, res->ai_socktype,
|
|
res->ai_protocol)) == -1)
|
|
continue;
|
|
if (connect(sd, res->ai_addr, res->ai_addrlen) != -1)
|
|
break;
|
|
close(sd);
|
|
sd = -1;
|
|
}
|
|
freeaddrinfo(res0);
|
|
if (sd == -1) {
|
|
_fetch_syserr();
|
|
return -1;
|
|
}
|
|
|
|
return sd;
|
|
}
|
|
|
|
|
|
/*
|
|
* Read a line of text from a socket w/ timeout
|
|
*/
|
|
#define MIN_BUF_SIZE 1024
|
|
|
|
int
|
|
_fetch_getln(int fd, char **buf, size_t *size, size_t *len)
|
|
{
|
|
struct timeval now, timeout, wait;
|
|
fd_set readfds;
|
|
int r;
|
|
char c;
|
|
|
|
if (*buf == NULL) {
|
|
if ((*buf = malloc(MIN_BUF_SIZE)) == NULL) {
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
*size = MIN_BUF_SIZE;
|
|
}
|
|
|
|
**buf = '\0';
|
|
*len = 0;
|
|
|
|
if (fetchTimeout) {
|
|
gettimeofday(&timeout, NULL);
|
|
timeout.tv_sec += fetchTimeout;
|
|
FD_ZERO(&readfds);
|
|
}
|
|
|
|
do {
|
|
if (fetchTimeout) {
|
|
FD_SET(fd, &readfds);
|
|
gettimeofday(&now, NULL);
|
|
wait.tv_sec = timeout.tv_sec - now.tv_sec;
|
|
wait.tv_usec = timeout.tv_usec - now.tv_usec;
|
|
if (wait.tv_usec < 0) {
|
|
wait.tv_usec += 1000000;
|
|
wait.tv_sec--;
|
|
}
|
|
if (wait.tv_sec < 0) {
|
|
errno = ETIMEDOUT;
|
|
return -1;
|
|
}
|
|
r = select(fd+1, &readfds, NULL, NULL, &wait);
|
|
if (r == -1) {
|
|
if (errno == EINTR && fetchRestartCalls)
|
|
continue;
|
|
/* EBADF or EINVAL: shouldn't happen */
|
|
return -1;
|
|
}
|
|
if (!FD_ISSET(fd, &readfds))
|
|
continue;
|
|
}
|
|
r = read(fd, &c, 1);
|
|
if (r == 0)
|
|
break;
|
|
if (r == -1) {
|
|
if (errno == EINTR && fetchRestartCalls)
|
|
continue;
|
|
/* any other error is bad news */
|
|
return -1;
|
|
}
|
|
(*buf)[*len] = c;
|
|
*len += 1;
|
|
if (*len == *size) {
|
|
char *tmp;
|
|
|
|
if ((tmp = realloc(*buf, *size * 2 + 1)) == NULL) {
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
*buf = tmp;
|
|
*size = *size * 2 + 1;
|
|
}
|
|
} while (c != '\n');
|
|
|
|
DEBUG(fprintf(stderr, "\033[1m<<< %.*s\033[m", (int)*len, *buf));
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Write a line of text to a socket w/ timeout
|
|
* XXX currently does not enforce timeout
|
|
*/
|
|
int
|
|
_fetch_putln(int fd, const char *str, size_t len)
|
|
{
|
|
struct iovec iov[2];
|
|
ssize_t wlen;
|
|
|
|
/* XXX should enforce timeout */
|
|
iov[0].iov_base = (char *)str;
|
|
iov[0].iov_len = len;
|
|
iov[1].iov_base = (char *)ENDL;
|
|
iov[1].iov_len = sizeof ENDL;
|
|
wlen = writev(fd, iov, 2);
|
|
DEBUG(fprintf(stderr, "\033[1m>>> %s\n\033[m", str));
|
|
return (wlen != len);
|
|
}
|
|
|
|
|
|
/*** Directory-related utility functions *************************************/
|
|
|
|
int
|
|
_fetch_add_entry(struct url_ent **p, int *size, int *len,
|
|
const char *name, struct url_stat *stat)
|
|
{
|
|
struct url_ent *tmp;
|
|
|
|
if (*p == NULL) {
|
|
#define INITIAL_SIZE 8
|
|
if ((*p = malloc(INITIAL_SIZE * sizeof **p)) == NULL) {
|
|
errno = ENOMEM;
|
|
_fetch_syserr();
|
|
return -1;
|
|
}
|
|
*size = INITIAL_SIZE;
|
|
*len = 0;
|
|
#undef INITIAL_SIZE
|
|
}
|
|
|
|
if (*len >= *size - 1) {
|
|
tmp = realloc(*p, *size * 2 * sizeof **p);
|
|
if (tmp == NULL) {
|
|
errno = ENOMEM;
|
|
_fetch_syserr();
|
|
return -1;
|
|
}
|
|
*size *= 2;
|
|
*p = tmp;
|
|
}
|
|
|
|
tmp = *p + *len;
|
|
snprintf(tmp->name, MAXPATHLEN, "%s", name);
|
|
bcopy(stat, &tmp->stat, sizeof *stat);
|
|
|
|
(*len)++;
|
|
(++tmp)->name[0] = 0;
|
|
|
|
return 0;
|
|
}
|