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wsd.c
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wsd.c
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/*
WSDD - Web Service Dynamic Discovery protocol server
WSD protocol handler
Copyright (c) 2016 NETGEAR
Copyright (c) 2016 Hiro Sugawara
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
This code is based on the wsdd implementation for Samba by
community contributers.
The original copyright comment follows.
*/
/*
Unix SMB/CIFS implementation.
Web Services for Devices (WSD) helper functions
https://msdn.microsoft.com/library/windows/desktop/aa826001(v=vs.85).aspx
https://msdn.microsoft.com/library/windows/hardware/jj123472.aspx
Copyright (C) Tobias Waldvogel 2013
Copyright (C) Jose M. Prieto 2015
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define _GNU_SOURCE // asprintf()
#include "wsdd.h" // struct endpoint, DEBUG()
#include "wsd.h" // struct wsd_req_info, WSD_ACTION_HELLO
#include <stdbool.h> // bool
#include <stdio.h> // FILE, fopen(), fscanf(), snprintf(), asprintf()
#include <stdlib.h> // srand48()
#include <unistd.h> // usleep()
#include <string.h> // strcmp(), strdup()
#include <ctype.h> // isdigit(), isspace()
#include <time.h> // time_t, time()
#include <errno.h> // errno
#include <sys/socket.h> // sendto()
#include <arpa/inet.h> // inet_ntop()
#define UUIDLEN 37
static time_t wsd_instance;
static char wsd_sequence[UUIDLEN], wsd_endpoint[UUIDLEN];
static void set_seed(void)
{
FILE *fp = fopen("/etc/machine-id", "r");
unsigned long seed;
time((time_t *)&seed);
if (fp) {
unsigned long s;
while (fscanf(fp, "%8lx", &s) > 0)
seed ^= s;
fclose(fp);
}
srand48(seed);
}
static void uuid_random(char *uuid, size_t len)
{
static bool seeded = false;
if (!seeded) {
set_seed();
seeded = true;
}
snprintf(uuid, len, "%08lx-%04lx-%04lx-%04lx-%08lx%04lx",
mrand48() & 0xffffffff,
mrand48() & 0xffff,
mrand48() & 0xffff,
mrand48() & 0xffff,
mrand48() & 0xffffffff,
mrand48() & 0xffff);
}
static void uuid_endpoint(char uuid[UUIDLEN])
{
FILE *fp = fopen("/etc/machine-id", "r");
int c, i = 0;
if (!fp) {
fp = fopen("/proc/sys/kernel/random/boot_id", "r");
}
if (!fp) {
DEBUG(0, W, "Can't open required '/etc/machine-id' or '/proc/sys/kernel/random/boot_id'");
return;
}
while (i < 36 && (c = getc(fp)) != EOF &&
((c == '-') || isdigit(c) || (islower(c) && isxdigit(c)))) {
if ((c != '-') && (i == 8 || i == 13 || i == 18 || i == 23))
uuid[i++] = '-';
uuid[i++] = c;
}
fclose(fp);
if (i == 36) {
uuid[i] = '\0';
} else {
uuid[0] = '\0';
errno = EINVAL;
}
}
static struct {
const char *key, *_default;
char *value;
} bootinfo[] = {
{ .key = "vendor:", ._default = "unknown"},
{ .key = "model:", ._default = "unknown"},
{ .key = "serial:", ._default = "0"},
{ .key = "sku:", ._default = "unknown"},
{ .key = "vendorurl:", ._default = NULL},
{ .key = "modelurl:", ._default = NULL},
{ .key = "presentationurl:", ._default = NULL},
{}
};
int set_getresp(const char *str, const char **next)
{
int i;
const char *p, *val;
size_t keylen, vallen;
if (str == NULL) {
return -1;
}
if (*str == '\0') {
return -1;
}
/* Trim leading space. */
while (*str && isspace(*str))
str++;
if (!*str) {
*next = str;
return 0;
}
/* Look for end of key. */
for (p = str; *p && !isspace(*p) && *p != ':' && *p != ','; p++)
;
if (!*p || (!isspace(*p) && *p != ':'))
goto exit;
keylen = p++ - str;
/* Look for value. */
while (*p && isspace(*p))
p++;
if (!*p || *p == ':')
goto exit;
val = p;
/* Look for end of value. */
while (*p && *p != ':' && *p != ',')
p++;
if (*p && *p != ',')
goto exit;
vallen = p - val;
if (next)
*next = *p ? ++p : NULL;;
/* Look for key in lookup table. */
for (i = 0; bootinfo[i].key; i++)
if (!strncasecmp(bootinfo[i].key, str, keylen))
break;
if (!bootinfo[i].key)
return -1;
if (!bootinfo[i].value)
bootinfo[i].value = strndup(val, vallen + 1);
return 0;
exit:
if (next)
*next = p;
return -1;
}
const char *get_getresp(const char *key)
{
for (int i = 0; bootinfo[i].key; i++)
if (!strcmp(bootinfo[i].key, key))
return bootinfo[i].value ? bootinfo[i].value : bootinfo[i]._default;
return "UNKNOWN";
}
void printBootInfoKeys(FILE *fp, int indent)
{
for (int i = 0; bootinfo[i].key; i++) {
fprintf(fp, "%*s%s %s\n", indent, "",
bootinfo[i].key, get_getresp(bootinfo[i].key));
}
}
void init_getresp(void)
{
static bool getresp_inited = false;
if (!getresp_inited) {
FILE *fp = fopen("/proc/sys/dev/boot/info", "r");
if (fp) {
char buf[80];
while (fgets(buf, sizeof(buf), fp))
set_getresp(buf, NULL);
fclose(fp);
}
getresp_inited = true;
}
}
#define SOAP11_NS \
"http://schemas.xmlsoap.org/soap/envelope/"
#define SOAP12_NS \
"http://www.w3.org/2003/05/soap-envelope"
#define WSA_NS \
"http://schemas.xmlsoap.org/ws/2004/08/addressing"
#define WSD_NS \
"http://schemas.xmlsoap.org/ws/2005/04/discovery"
#define WXT_NS \
"http://schemas.xmlsoap.org/ws/2004/09/transfer"
#define WSD_ACT_HELLO \
"http://schemas.xmlsoap.org/ws/2005/04/discovery/Hello"
#define WSD_ACT_BYE \
"http://schemas.xmlsoap.org/ws/2005/04/discovery/Bye"
#define WSD_ACT_PROBE \
"http://schemas.xmlsoap.org/ws/2005/04/discovery/Probe"
#define WSD_ACT_PROBEMATCH \
"http://schemas.xmlsoap.org/ws/2005/04/discovery/ProbeMatches"
#define WSD_ACT_RESOLVE \
"http://schemas.xmlsoap.org/ws/2005/04/discovery/Resolve"
#define WSD_ACT_RESOLVEMATCH \
"http://schemas.xmlsoap.org/ws/2005/04/discovery/ResolveMatches"
#define WXT_ACT_GET \
"http://schemas.xmlsoap.org/ws/2004/09/transfer/Get"
#define WXT_ACT_GETRESPONSE \
"http://schemas.xmlsoap.org/ws/2004/09/transfer/GetResponse"
#define WSD_TO_DISCOVERY \
"urn:schemas-xmlsoap-org:ws:2005:04:discovery"
#define WSD_TO_ANONYMOUS \
"http://schemas.xmlsoap.org/ws/2004/08/addressing/role/anonymous"
/*
* macros
*/
#define RESET_BUFFER(buf, buflen) \
if (buflen > 0) do { memset(buf, 0, buflen); buflen=0; } while(0)
#define COPY_STRING_TO_BUFFER(dst, dstlen, start, src, srclen) \
do { \
srclen = strlen(src); \
if (((start + srclen) - dst) > dstlen) { \
srclen = -1; \
break; \
} \
strncpy(start, src, srclen); \
start += srclen; \
} while(0)
#define RESOLVE_TAG_AND_SAVE \
do { \
qn = xmlns_resolve_tag(table, tag); \
if (qn) { \
(*qnames_len)++; \
qnames[(*qnames_len)-1] = qn; \
} \
} while(0)
/*
* Simplified flat XML tag finder - practical enough for our purposes.
*/
static const char *wsd_tag_find(const char *xml,
const char *tag[][2], size_t *len)
{
int i;
for (i = 0; tag[i][0]; i++) {
const char *p = strstr(xml, tag[i][0]);
if (!p)
continue;
p += strlen(tag[i][0]);
while (isspace(*p))
p++;
const char *q = strstr(p, tag[i][1]);
if (!q || strchr(p, '<') < q)
continue;
while(p < q && isspace(q[-1]))
q--;
*len = q - p;
return p;
}
return NULL;
}
/*
* Extremely simplified flat XML parser - practical enough for our purposes.
*/
static struct wsd_req_info *wsd_req_parse(const char *xml)
{
static const char *action_tag[][2] = {
{"<wsa:Action>", "</wsa:Action>"},
{"<wsa:Action SOAP-ENV:mustUnderstand=\"true\">",
"</wsa:Action>"},
{},
};
static const char *msgid_tag[][2] = {
{"<wsa:MessageID>", "</wsa:MessageID>"},
{"<wsa:MessageID SOAP-ENV:mustUnderstand=\"true\">",
"</wsa:MessageID>"},
{},
};
size_t action_len;
const char *action = wsd_tag_find(xml, action_tag, &action_len);
if (!action)
return NULL;
size_t msgid_len;
const char *msgid = wsd_tag_find(xml, msgid_tag, &msgid_len);
if (!msgid)
return NULL;
struct wsd_req_info *info = calloc(sizeof *info, 1);
if (!info)
return NULL;
info->action = strndup(action, action_len);
info->msgid = strndup(msgid, msgid_len);
static const char *address_tag[][2] = { {"<wsa:Address>", "</wsa:Address>"}, {} };
size_t address_len;
const char *address = wsd_tag_find(xml, address_tag, &address_len);
info->address = address ? strndup(address, address_len) : NULL;
return info;
}
static void wsd_req_destruct(struct wsd_req_info *info)
{
if (!info) return;
free(info->action);
free(info->msgid);
free(info->address);
free(info);
}
enum wsd_action wsd_action_id(const struct wsd_req_info *info)
{
if (!info || !info->action) {
return WSD_ACTION_NONE;
}
if (strcmp(info->action, WSD_ACT_HELLO) == 0) {
return WSD_ACTION_HELLO;
}
if (strcmp(info->action, WSD_ACT_BYE) == 0) {
return WSD_ACTION_BYE;
}
if (strcmp(info->action, WSD_ACT_PROBE) == 0) {
return WSD_ACTION_PROBE;
}
if (strcmp(info->action, WSD_ACT_PROBEMATCH) == 0) {
return WSD_ACTION_PROBEMATCH;
}
if (strcmp(info->action, WSD_ACT_RESOLVE) == 0) {
return WSD_ACTION_RESOLVE;
}
if (strcmp(info->action, WSD_ACT_RESOLVEMATCH) == 0) {
return WSD_ACTION_RESOLVEMATCH;
}
if (strcmp(info->action, WXT_ACT_GET) == 0) {
return WSD_ACTION_GET;
}
if (strcmp(info->action, WXT_ACT_GETRESPONSE) == 0) {
return WSD_ACTION_GETRESPONSE;
}
return WSD_ACTION_NONE;
}
static int wsd_send_msg(int fd, struct endpoint *ep, const _saddr_t *sa,
const char *msg, size_t msglen, unsigned int rwait)
{
int ret;
errno = 0;
if (ep->type == SOCK_STREAM) {
ret = send(fd, msg, msglen, MSG_NOSIGNAL);
} else {
if (rwait) {
useconds_t us = random() % rwait;
usleep(us);
}
ret = sendto(fd, msg, msglen, MSG_NOSIGNAL, (struct sockaddr *)sa,
(ep->family == AF_INET) ? sizeof sa->in : sizeof sa->in6);
}
char ip[_ADDRSTRLEN];
inet_ntop(sa->ss.ss_family, _SIN_ADDR(sa), ip, sizeof ip);
DEBUG(3, W, "WSD-TO %s port %u (fd=%d,len=%d,sent=%d) '%s'\n", ip, _SIN_PORT(sa), fd,
msglen, ret, msg);
return ret != (int) msglen;
}
/*
* wsd soap fault
*/
static int wsd_send_soap_fault(int fd, struct endpoint *ep, _saddr_t *sa,
int code, const char *reason, const char *detail)
{
static const char soap_fault_fmt[] =
"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
"<soap:Envelope "
"xmlns:soap=\"http://www.w3.org/2003/05/soap-envelope\" "
"xmlns:wsa=\"http://schemas.xmlsoap.org/ws/2004/08/addressing\">"
"<soap:Header>"
"<wsa:Action>"
"http://schemas.xmlsoap.org/ws/2004/09/transfer/fault"
"</wsa:Action>"
"</soap:Header>"
"<soap:Body>"
"<soap:Fault>"
"<soap:Code>"
"<soap:Value>%d</soap:Value>"
"<soap:Subcode>"
"<soap:Value>%d</soap:Value>"
"<soap:Subcode>"
"<soap:Value>%d</soap:Value>"
"</soap:Subcode>"
"</soap:Subcode>"
"</soap:Code>"
"<soap:Reason>"
"<soap:Text xml:lang=\"en\">%s</soap:Text>"
"</soap:Reason>"
"<soap:Detail>%s</soap:Detail>"
"</soap:Fault>"
"</soap:Body>"
"</soap:Envelope>";
char *s;
int rv;
ssize_t len = asprintf(&s, soap_fault_fmt, code, 0, 0, reason, detail);
if (len <= 0) {
ep->errstr = "wsd_send_soap_fault: asprintf";
ep->_errno = ENOMEM;
return -1;
}
rv = wsd_send_msg(fd, ep, sa, s, len, 0);
free(s);
return rv;
}
/*
* complete and generate the whole WSD SOAP message
*/
static int wsd_send_soap_msg(int fd, struct endpoint *ep,
const _saddr_t *sa,
const char *to,
const char *action, const char *relates,
const char *body,
int (*header)(int fd, struct endpoint *ep,
const _saddr_t *sa,
int status, size_t len),
int status)
{
#define __FUNCTION__ "wsd_send_soap_msg"
static unsigned int msg_no;
static const char soap_msg_templ[] =
"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
"<soap:Envelope "
"xmlns:soap=\"http://www.w3.org/2003/05/soap-envelope\" "
"xmlns:wsa=\"http://schemas.xmlsoap.org/ws/2004/08/addressing\" "
"xmlns:wsd=\"http://schemas.xmlsoap.org/ws/2005/04/discovery\" "
"xmlns:wsx=\"http://schemas.xmlsoap.org/ws/2004/09/mex\" "
"xmlns:wsdp=\"http://schemas.xmlsoap.org/ws/2006/02/devprof\" "
"xmlns:un0=\"http://schemas.microsoft.com/windows/pnpx/2005/10\" "
"xmlns:pub=\"http://schemas.microsoft.com/windows/pub/2005/07\">"
"<soap:Header>"
"<wsa:To>%s</wsa:To>"
"<wsa:Action>%s</wsa:Action>"
"<wsa:MessageID>urn:uuid:%s</wsa:MessageID>"
"<wsd:AppSequence InstanceId=\"%lu\" SequenceId=\"urn:uuid:%s\" "
"MessageNumber=\"%u\" />"
"%s"
"</soap:Header>"
"%s"
"</soap:Envelope>";
char msg_id[UUIDLEN], *soap_relates, *msg;
uuid_random(msg_id, sizeof msg_id);
if (relates) {
if (asprintf(&soap_relates,
"<wsa:RelatesTo>%s</wsa:RelatesTo>", relates) <= 0) {
ep->errstr = __FUNCTION__ ": asprintf";
ep->_errno = errno;
return -1;
}
} else {
if (!(soap_relates = strdup(""))) {
ep->errstr = __FUNCTION__ ": strdup";
ep->_errno = errno;
return -1;
}
}
ssize_t msglen = asprintf(&msg, soap_msg_templ, to, action, msg_id,
wsd_instance, wsd_sequence,
++msg_no, soap_relates,
body);
free(soap_relates);
if (msglen <= 0) {
ep->errstr = __FUNCTION__ ": asprintf";
ep->_errno = errno;
return -1;
}
int rv = 0;
if (header)
rv = header(fd, ep, sa, status, msglen);
if (rv == 0) {
rv = wsd_send_msg(fd, ep, sa, msg, msglen, 0);
if (rv) {
ep->errstr = __FUNCTION__ ": send";
ep->_errno = errno;
rv = -1;
}
}
free(msg);
return rv;
#undef __FUNCTION__
}
static int wsd_send_hello(struct endpoint *ep)
{
static const char body_templ[] =
"<soap:Body>"
"<wsd:Hello>"
"<wsa:EndpointReference>"
"<wsa:Address>urn:uuid:%s</wsa:Address>"
"</wsa:EndpointReference>"
"<wsd:Types>wsdp:Device pub:Computer</wsd:Types>"
"<wsd:MetadataVersion>2</wsd:MetadataVersion>"
"</wsd:Hello>"
"</soap:Body>";
char *body;
if (asprintf(&body, body_templ, wsd_endpoint) <= 0) {
ep->errstr = "wsd_send_hello: asprintf";
ep->_errno = ENOMEM;
return -1;
}
int rv = wsd_send_soap_msg(ep->sock, ep, &ep->mcast, WSD_TO_DISCOVERY,
WSD_ACT_HELLO, NULL, body, NULL, 0);
free(body);
return rv;
}
static int wsd_send_bye(struct endpoint *ep)
{
static const char body_templ[] =
"<soap:Body>"
"<wsd:Bye>"
"<wsa:EndpointReference>"
"<wsa:Address>urn:uuid:%s</wsa:Address>"
"</wsa:EndpointReference>"
"<wsd:Types>wsdp:Device pub:Computer</wsd:Types>"
"<wsd:MetadataVersion>2</wsd:MetadataVersion>"
"</wsd:Bye>"
"</soap:Body>";
char *body;
if (asprintf(&body, body_templ, wsd_endpoint) <= 0) {
ep->errstr = "wsd_send_bye: asprintf";
ep->_errno = ENOMEM;
return -1;
}
int rv = wsd_send_soap_msg(ep->sock, ep, &ep->mcast, WSD_TO_DISCOVERY,
WSD_ACT_BYE, NULL, body, NULL, 0);
free(body);
return rv;
}
static int wsd_send_probe_match(int fd,
struct endpoint *ep,
const _saddr_t *sa,
const struct wsd_req_info *info,
const char *ip)
{
static const char body_templ[] =
"<soap:Body>"
"<wsd:ProbeMatches>"
"<wsd:ProbeMatch>"
"<wsa:EndpointReference>"
"<wsa:Address>urn:uuid:%s</wsa:Address>"
"</wsa:EndpointReference>"
"<wsd:Types>wsdp:Device pub:Computer</wsd:Types>"
"<wsd:XAddrs>http://%s:%u/%s</wsd:XAddrs>"
"<wsd:MetadataVersion>2</wsd:MetadataVersion>"
"</wsd:ProbeMatch>"
"</wsd:ProbeMatches>"
"</soap:Body>";
char *body, *uri_ip = ip2uri(ip);
if (!uri_ip || asprintf(&body, body_templ, wsd_endpoint, uri_ip, ep->port, wsd_endpoint) <= 0) {
ep->errstr = "wsd_send_probe_match: ip2uri/asprintf";
ep->_errno = errno;
free(uri_ip);
return -1;
}
int rv = wsd_send_soap_msg(fd, ep, sa, WSD_TO_ANONYMOUS,
WSD_ACT_PROBEMATCH, info->msgid, body, NULL, 0);
free(uri_ip);
free(body);
return rv;
}
static int wsd_send_resolve_match(int fd,
struct endpoint *ep,
const _saddr_t *sa,
const struct wsd_req_info *info,
const char *ip)
{
const char body_templ[] =
"<soap:Body>"
"<wsd:ResolveMatches>"
"<wsd:ResolveMatch>"
"<wsa:EndpointReference>"
"<wsa:Address>urn:uuid:%s</wsa:Address>"
"</wsa:EndpointReference>"
"<wsd:Types>wsdp:Device pub:Computer</wsd:Types>"
"<wsd:XAddrs>http://%s:%u/%s</wsd:XAddrs>"
"<wsd:MetadataVersion>2</wsd:MetadataVersion>"
"</wsd:ResolveMatch>"
"</wsd:ResolveMatches>"
"</soap:Body>";
char *body, *uri_ip = ip2uri(ip);
if (!uri_ip || asprintf(&body, body_templ, wsd_endpoint, uri_ip, ep->port, wsd_endpoint) <= 0) {
ep->errstr = "wsd_send_resolve_match: ip2uri/asprintf";
ep->_errno = errno;
free(uri_ip);
return -1;
}
int err = wsd_send_soap_msg(fd, ep, sa, WSD_TO_ANONYMOUS,
WSD_ACT_RESOLVEMATCH, info->msgid, body, NULL, 0);
free(uri_ip);
free(body);
return err;
}
/*
* Send HTTP response header
*/
static int send_http_resp_header(int fd, struct endpoint *ep,
const _saddr_t *sa, int status, size_t length)
{
const char resp_hdr_fmt[] =
"HTTP/1.1 %s\r\n"
"Server: NETGEAR WSD Server\r\n"
"Date: %s\r\n"
"Connection: close\r\n"
"Content-Type: application/soap+xml\r\n"
"Content-Length: %zu\r\n"
"\r\n";
const char *status_str;
int rv = 0;
/*
* HTTP status codes
* RFC 2616: https://tools.ietf.org/html/rfc2616
*/
switch(status) {
case 200:
status_str = "200 OK";
break;
case 400:
status_str = "400 Bad Request";
break;
case 405:
status_str = "405 Method Not Allowed";
break;
case 500:
status_str = "500 Internal Server Error";
break;
default:
status_str = "404 Not Found";
break;
}
char time_str[32];
time_t t;
time(&t);
strftime(time_str, sizeof(time_str), "%a, %d %b %Y %H:%M:%S GMT", gmtime(&t));
char *s;
ssize_t len = asprintf(&s, resp_hdr_fmt, status_str, time_str, length);
if (len <= 0) {
ep->errstr = "send_http_resp_header: asprintf";
ep->_errno = errno;
return -1;
}
DEBUG(4, W, "---------- HEADER:\n%s----------\n", s);
if (wsd_send_msg(fd, ep, sa, s, len, WSD_RANDOM_DELAY) != 0) {
ep->errstr = "send_http_resp_header: send";
ep->_errno = errno;
rv = -1;
}
free(s);
return rv;
}
static int wsd_send_get_response(int fd,
struct endpoint *ep,
const _saddr_t *sa,
const struct wsd_req_info *info,
const char *ip)
{
char *body;
const char body_templ[] =
"<soap:Body>"
"<wsx:Metadata>"
"<wsx:MetadataSection Dialect=\""
"http://schemas.xmlsoap.org/ws/2006/02/devprof/ThisDevice\">"
"<wsdp:ThisDevice>"
"<wsdp:FriendlyName>%s</wsdp:FriendlyName>"
"<wsdp:FirmwareVersion>%s</wsdp:FirmwareVersion>"
"<wsdp:SerialNumber>%s</wsdp:SerialNumber>"
"</wsdp:ThisDevice>"
"</wsx:MetadataSection>"
"<wsx:MetadataSection Dialect=\""
"http://schemas.xmlsoap.org/ws/2006/02/devprof/ThisModel\">"
"<wsdp:ThisModel>"
"<wsdp:Manufacturer>%s</wsdp:Manufacturer>"
"<wsdp:ManufacturerUrl>%s</wsdp:ManufacturerUrl>"
"<wsdp:ModelName>%s</wsdp:ModelName>"
"<wsdp:ModelNumber>1</wsdp:ModelNumber>"
"<wsdp:ModelUrl>%s</wsdp:ModelUrl>"
"<wsdp:PresentationUrl>%s</wsdp:PresentationUrl>"
"<un0:DeviceCategory>Computers</un0:DeviceCategory>"
"</wsdp:ThisModel>"
"</wsx:MetadataSection>"
"<wsx:MetadataSection Dialect=\""
"http://schemas.xmlsoap.org/ws/2006/02/devprof/Relationship\">"
"<wsdp:Relationship Type=\""
"http://schemas.xmlsoap.org/ws/2006/02/devprof/host\">"
"<wsdp:Host>"
"<wsa:EndpointReference>"
"<wsa:Address>urn:uuid:%s</wsa:Address>"
"</wsa:EndpointReference>"
"<wsdp:Types>pub:Computer</wsdp:Types>"
"<wsdp:ServiceId>urn:uuid:%s</wsdp:ServiceId>"
"<pub:Computer>%s/Workgroup:%s</pub:Computer>"
"</wsdp:Host>"
"</wsdp:Relationship>"
"</wsx:MetadataSection>"
"</wsx:Metadata>"
"</soap:Body>";
ssize_t len = asprintf(&body, body_templ,
"Microsoft Publication Service Device Host",
"1.0",
"20050718",
get_getresp("vendor:"),
get_getresp("vendorurl:"),
get_getresp("model:"),
get_getresp("modelurl:"),
get_getresp("presentationurl:"),
wsd_endpoint,
wsd_endpoint,
netbiosname,
workgroup
);
(void) ip; // silent "unused" warning
if (len <= 0) {
ep->errstr = "wsd_send_get_response: asprintf";
ep->_errno = errno;
return -1;
}
int rv = wsd_send_soap_msg(fd, ep, sa, WSD_TO_ANONYMOUS,
WXT_ACT_GETRESPONSE, info->msgid, body, send_http_resp_header, 200);
free(body);
return rv;
}
/*
* Validate HTTP POST header lines.
* Re-fill buffer with HTTP body.
* Return MIME error code.
*/
static int wsd_parse_http_header(int fd, struct endpoint *ep,
char *buf, size_t len, size_t bsize)
{
#define __FUNCTION__ "wsd_pars_http_header"
size_t contentlength = 0;
char *p = buf;
char *eol = strstr(p, "\r\n");
static size_t endpointlen;
if (!endpointlen)
endpointlen = strlen(wsd_endpoint);
*eol = '\0';
if (strncmp(p, "POST /", 6)) {
ep->errstr = __FUNCTION__ ": Only POST method supported";
return 405;
}
if (strncmp(p + 6, wsd_endpoint, endpointlen)) {
ep->errstr = __FUNCTION__ ": Invalid endpoint UUID";
return 404;
}
if (strncmp(p + 6 + endpointlen, " HTTP/", 6)) {
ep->errstr = __FUNCTION__ ": Must be HTTP/1.0 and up";
return 405;
}
p = eol + 2;
again:
#define HEADER_IS(p,h) (strncasecmp((p), (h), strlen((h))) ? NULL : (p) + strlen(h))
while (*p && (eol = strstr(p, "\r\n")) != p) {
const char *val;
if (!eol) break;
*eol = '\0';
if ((val = HEADER_IS(p, "Content-Type:"))) {
while (*val == ' ' || *val == '\t' || *val == '\r' || *val == '\n')
val++; // skip LWS
if (strcmp(val, "application/soap+xml")) {
ep->errstr = __FUNCTION__ ": Unsupported Content-Type";
return 400;
}
} else if ((val = HEADER_IS(p, "Content-Length:"))) {
while (*val == ' ' || *val == '\t' || *val == '\r' || *val == '\n')
val++; // skip LWS
if ((contentlength = atoi(val)) <= 0) {
ep->errstr = __FUNCTION__ ": Invalid Content-Length";
return 400;
}
}
p = eol + 2;
}
bool eoh = false;
if (eol == p) {
p = eol + 2;
eoh = true;
}
memmove(buf, p, len -= (p - buf));
buf[len] = '\0';
if (!eoh) { /* Have not reached end of header. */
ssize_t len2 = recv(fd, buf + len, bsize - len - 1, 0);
if (len2 <= 0) {
ep->errstr = __FUNCTION__ ": Data receiving error";
return 500;
}
len += len2;
buf[len] = '\0';
goto again;
}
if (!contentlength) {
ep->errstr = __FUNCTION__ ": Invalid Content-Length";
return 400;
}
if (len < contentlength) {
if (contentlength >= bsize) {
ep->errstr = __FUNCTION__ ": Content-Length too large";
return 500;
}
ssize_t len2 = recv(fd, buf + len, contentlength - len, 0);
if (len2 < (ssize_t) (contentlength - len)) {
ep->errstr = __FUNCTION__ ": Data receiving error";
return 500;
}
}
buf[contentlength] = '\0';
return 200;
#undef __FUNCTION__
}
int wsd_init(struct endpoint *ep)
{
if (!wsd_instance)
time(&wsd_instance);
if (!wsd_sequence[0])
uuid_random(wsd_sequence, sizeof(wsd_sequence));
if (!wsd_endpoint[0]) {
uuid_endpoint(wsd_endpoint);
if (!wsd_endpoint[0]) {
ep->errstr = "wsd_init: uuid_endpoint";
ep->_errno = errno;
return -1;
}
}
return wsd_send_hello(ep);
}
static int wsd_recv_action(int (*f)(int fd,
struct endpoint *ep,
const _saddr_t *sa,
const struct wsd_req_info *info,
const char *ip),
int fd,
struct endpoint *ep,
const _saddr_t *sa,
const struct wsd_req_info *info)
{
_saddr_t ci;
if (connected_if(sa, &ci)) {
ep->errstr = "wsd_recv_action: connected_if";
ep->_errno = errno;
return -1;
}
char ip[_ADDRSTRLEN];