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84eafb71de
grub2/debian/patches/net-read-bracketed-ipv6-addr.patch
Colin Watson 84eafb71de Drop mkconfig-mid-upgrade.patch 
It was only needed for upgrades from GRUB 1.99 (now a long time ago) and
can inappropriately hide problems when /etc/grub.d/00_header should have
been updated but wasn't.

Closes: #953201
2020-03-07 12:23:30 +00:00

255 lines
7.1 KiB
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From baf5beb0dba441f4622de2f0d152e389975fee56 Mon Sep 17 00:00:00 2001
From: Aaron Miller <aaronmiller@fb.com>
Date: Thu, 27 Oct 2016 17:39:49 -0400
Subject: net: read bracketed ipv6 addrs and port numbers
Allow specifying port numbers for http and tftp paths, and allow ipv6 addresses
to be recognized with brackets around them, which is required to specify a port
number
Patch-Name: net-read-bracketed-ipv6-addr.patch
---
grub-core/net/http.c | 21 ++++++++--
grub-core/net/net.c | 93 +++++++++++++++++++++++++++++++++++++++++---
grub-core/net/tftp.c | 6 ++-
include/grub/net.h | 1 +
4 files changed, 110 insertions(+), 11 deletions(-)
diff --git a/grub-core/net/http.c b/grub-core/net/http.c
index 5aa4ad3be..f182d7b87 100644
--- a/grub-core/net/http.c
+++ b/grub-core/net/http.c
@@ -312,12 +312,14 @@ http_establish (struct grub_file *file, grub_off_t offset, int initial)
int i;
struct grub_net_buff *nb;
grub_err_t err;
+ char* server = file->device->net->server;
+ int port = file->device->net->port;
nb = grub_netbuff_alloc (GRUB_NET_TCP_RESERVE_SIZE
+ sizeof ("GET ") - 1
+ grub_strlen (data->filename)
+ sizeof (" HTTP/1.1\r\nHost: ") - 1
- + grub_strlen (file->device->net->server)
+ + grub_strlen (server) + sizeof (":XXXXXXXXXX")
+ sizeof ("\r\nUser-Agent: " PACKAGE_STRING
"\r\n") - 1
+ sizeof ("Range: bytes=XXXXXXXXXXXXXXXXXXXX"
@@ -356,7 +358,7 @@ http_establish (struct grub_file *file, grub_off_t offset, int initial)
sizeof (" HTTP/1.1\r\nHost: ") - 1);
ptr = nb->tail;
- err = grub_netbuff_put (nb, grub_strlen (file->device->net->server));
+ err = grub_netbuff_put (nb, grub_strlen (server));
if (err)
{
grub_netbuff_free (nb);
@@ -365,6 +367,15 @@ http_establish (struct grub_file *file, grub_off_t offset, int initial)
grub_memcpy (ptr, file->device->net->server,
grub_strlen (file->device->net->server));
+ if (port)
+ {
+ ptr = nb->tail;
+ grub_snprintf ((char *) ptr,
+ sizeof (":XXXXXXXXXX"),
+ ":%d",
+ port);
+ }
+
ptr = nb->tail;
err = grub_netbuff_put (nb,
sizeof ("\r\nUser-Agent: " PACKAGE_STRING "\r\n")
@@ -390,8 +401,10 @@ http_establish (struct grub_file *file, grub_off_t offset, int initial)
grub_netbuff_put (nb, 2);
grub_memcpy (ptr, "\r\n", 2);
- data->sock = grub_net_tcp_open (file->device->net->server,
- HTTP_PORT, http_receive,
+ grub_dprintf ("http", "opening path %s on host %s TCP port %d\n",
+ data->filename, server, port ? port : HTTP_PORT);
+ data->sock = grub_net_tcp_open (server,
+ port ? port : HTTP_PORT, http_receive,
http_err, http_err,
file);
if (!data->sock)
diff --git a/grub-core/net/net.c b/grub-core/net/net.c
index d5d726a31..b917a75d5 100644
--- a/grub-core/net/net.c
+++ b/grub-core/net/net.c
@@ -437,6 +437,12 @@ parse_ip6 (const char *val, grub_uint64_t *ip, const char **rest)
grub_uint16_t newip[8];
const char *ptr = val;
int word, quaddot = -1;
+ int bracketed = 0;
+
+ if (ptr[0] == '[') {
+ bracketed = 1;
+ ptr++;
+ }
if (ptr[0] == ':' && ptr[1] != ':')
return 0;
@@ -475,6 +481,9 @@ parse_ip6 (const char *val, grub_uint64_t *ip, const char **rest)
grub_memset (&newip[quaddot], 0, (7 - word) * sizeof (newip[0]));
}
grub_memcpy (ip, newip, 16);
+ if (bracketed && *ptr == ']') {
+ ptr++;
+ }
if (rest)
*rest = ptr;
return 1;
@@ -1260,8 +1269,10 @@ grub_net_open_real (const char *name)
{
grub_net_app_level_t proto;
const char *protname, *server;
+ char *host;
grub_size_t protnamelen;
int try;
+ int port = 0;
if (grub_strncmp (name, "pxe:", sizeof ("pxe:") - 1) == 0)
{
@@ -1299,6 +1310,72 @@ grub_net_open_real (const char *name)
return NULL;
}
+ char* port_start;
+ /* ipv6 or port specified? */
+ if ((port_start = grub_strchr (server, ':')))
+ {
+ char* ipv6_begin;
+ if((ipv6_begin = grub_strchr (server, '[')))
+ {
+ char* ipv6_end = grub_strchr (server, ']');
+ if(!ipv6_end)
+ {
+ grub_error (GRUB_ERR_NET_BAD_ADDRESS,
+ N_("mismatched [ in address"));
+ return NULL;
+ }
+ /* port number after bracketed ipv6 addr */
+ if(ipv6_end[1] == ':')
+ {
+ port = grub_strtoul (ipv6_end + 2, NULL, 10);
+ if(port > 65535)
+ {
+ grub_error (GRUB_ERR_NET_BAD_ADDRESS,
+ N_("bad port number"));
+ return NULL;
+ }
+ }
+ host = grub_strndup (ipv6_begin, (ipv6_end - ipv6_begin) + 1);
+ }
+ else
+ {
+ if (grub_strchr (port_start + 1, ':'))
+ {
+ int iplen = grub_strlen (server);
+ /* bracket bare ipv6 addrs */
+ host = grub_malloc (iplen + 3);
+ if(!host)
+ {
+ return NULL;
+ }
+ host[0] = '[';
+ grub_memcpy (host + 1, server, iplen);
+ host[iplen + 1] = ']';
+ host[iplen + 2] = '\0';
+ }
+ else
+ {
+ /* hostname:port or ipv4:port */
+ port = grub_strtol (port_start + 1, NULL, 10);
+ if(port > 65535)
+ {
+ grub_error (GRUB_ERR_NET_BAD_ADDRESS,
+ N_("bad port number"));
+ return NULL;
+ }
+ host = grub_strndup (server, port_start - server);
+ }
+ }
+ }
+ else
+ {
+ host = grub_strdup (server);
+ }
+ if (!host)
+ {
+ return NULL;
+ }
+
for (try = 0; try < 2; try++)
{
FOR_NET_APP_LEVEL (proto)
@@ -1308,15 +1385,19 @@ grub_net_open_real (const char *name)
{
grub_net_t ret = grub_zalloc (sizeof (*ret));
if (!ret)
- return NULL;
- ret->protocol = proto;
- ret->server = grub_strdup (server);
- if (!ret->server)
+ grub_free (host);
+ if (host)
{
- grub_free (ret);
- return NULL;
+ ret->server = grub_strdup (host);
+ if (!ret->server)
+ {
+ grub_free (ret);
+ return NULL;
+ }
}
ret->fs = &grub_net_fs;
+ ret->protocol = proto;
+ ret->port = port;
return ret;
}
}
diff --git a/grub-core/net/tftp.c b/grub-core/net/tftp.c
index 7d90bf66e..a0817a075 100644
--- a/grub-core/net/tftp.c
+++ b/grub-core/net/tftp.c
@@ -314,6 +314,7 @@ tftp_open (struct grub_file *file, const char *filename)
grub_err_t err;
grub_uint8_t *nbd;
grub_net_network_level_address_t addr;
+ int port = file->device->net->port;
data = grub_zalloc (sizeof (*data));
if (!data)
@@ -382,13 +383,16 @@ tftp_open (struct grub_file *file, const char *filename)
err = grub_net_resolve_address (file->device->net->server, &addr);
if (err)
{
+ grub_dprintf ("tftp", "file_size is %llu, block_size is %llu\n",
+ (unsigned long long)data->file_size,
+ (unsigned long long)data->block_size);
destroy_pq (data);
grub_free (data);
return err;
}
data->sock = grub_net_udp_open (addr,
- TFTP_SERVER_PORT, tftp_receive,
+ port ? port : TFTP_SERVER_PORT, tftp_receive,
file);
if (!data->sock)
{
diff --git a/include/grub/net.h b/include/grub/net.h
index 4a9069a14..cc114286e 100644
--- a/include/grub/net.h
+++ b/include/grub/net.h
@@ -270,6 +270,7 @@ typedef struct grub_net
{
char *server;
char *name;
+ int port;
grub_net_app_level_t protocol;
grub_net_packets_t packs;
grub_off_t offset;
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