18 |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
19 |
*/ |
*/ |
20 |
|
|
21 |
#include "includes.h" |
#include <unistd.h> /* select read write close */ |
22 |
|
#include <sys/socket.h> /* socket connect setsockopt */ |
23 |
|
#include <sys/time.h> /* timeval */ |
24 |
|
#include <netdb.h> /* gethostbyname */ |
25 |
|
#include <netinet/tcp.h> /* TCP_NODELAY */ |
26 |
|
#include <arpa/inet.h> /* inet_aton */ |
27 |
|
#include <errno.h> /* errno */ |
28 |
|
#include "rdesktop.h" |
29 |
|
|
30 |
|
static int sock; |
31 |
|
static struct stream in; |
32 |
|
static struct stream out; |
33 |
|
|
34 |
/* Establish a connection on the TCP layer */ |
/* Initialise TCP transport data packet */ |
35 |
HCONN tcp_connect(char *server) |
STREAM tcp_init(int maxlen) |
36 |
{ |
{ |
37 |
struct hostent *nslookup; |
if (maxlen > out.size) |
|
struct sockaddr_in servaddr; |
|
|
struct connection *conn; |
|
|
int sock; |
|
|
int true = 1; |
|
|
|
|
|
if ((nslookup = gethostbyname(server)) != NULL) |
|
|
{ |
|
|
memcpy(&servaddr.sin_addr, nslookup->h_addr, sizeof(servaddr.sin_addr)); |
|
|
} |
|
|
else if (!inet_aton(server, &servaddr.sin_addr)) |
|
|
{ |
|
|
fprintf(stderr, "%s: unable to resolve host\n", server); |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) |
|
38 |
{ |
{ |
39 |
fprintf(stderr, "socket: %s\n", strerror(errno)); |
out.data = xrealloc(out.data, maxlen); |
40 |
return NULL; |
out.size = maxlen; |
41 |
} |
} |
42 |
|
|
43 |
servaddr.sin_family = AF_INET; |
out.p = out.data; |
44 |
servaddr.sin_port = htons(TCP_PORT_RDP); |
out.end = out.data + out.size; |
45 |
|
return &out; |
|
if (connect(sock, (struct sockaddr *)&servaddr, sizeof(struct sockaddr)) < 0) |
|
|
{ |
|
|
fprintf(stderr, "connect: %s\n", strerror(errno)); |
|
|
close(sock); |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &true, sizeof(true)); |
|
|
|
|
|
conn = xmalloc(sizeof(struct connection)); |
|
|
STREAM_INIT(conn->in, False); |
|
|
STREAM_INIT(conn->out, True); |
|
|
|
|
|
conn->tcp_socket = sock; |
|
|
return conn; |
|
|
} |
|
|
|
|
|
/* Disconnect on the TCP layer */ |
|
|
void tcp_disconnect(HCONN conn) |
|
|
{ |
|
|
close(conn->tcp_socket); |
|
|
free(conn); |
|
46 |
} |
} |
47 |
|
|
48 |
/* Send TCP transport data packet */ |
/* Send TCP transport data packet */ |
49 |
BOOL tcp_send(HCONN conn) |
void tcp_send(STREAM s) |
50 |
{ |
{ |
51 |
int length = conn->out.end; |
int length = s->end - s->data; |
52 |
int sent, total = 0; |
int sent, total = 0; |
53 |
|
|
54 |
while (total < length) |
while (total < length) |
55 |
{ |
{ |
56 |
sent = write(conn->tcp_socket, conn->out.data + total, |
sent = write(sock, s->data + total, length - total); |
|
length - total); |
|
57 |
|
|
58 |
if (sent <= 0) |
if (sent <= 0) |
59 |
{ |
{ |
60 |
fprintf(stderr, "write: %s\n", strerror(errno)); |
STATUS("write: %s\n", strerror(errno)); |
61 |
return False; |
return; |
62 |
} |
} |
63 |
|
|
64 |
total += sent; |
total += sent; |
65 |
} |
} |
|
|
|
|
conn->out.offset = 0; |
|
|
conn->out.end = conn->out.size; |
|
|
return True; |
|
66 |
} |
} |
67 |
|
|
68 |
/* Receive a message on the TCP layer */ |
/* Receive a message on the TCP layer */ |
69 |
BOOL tcp_recv(HCONN conn, int length) |
STREAM tcp_recv(int length) |
70 |
{ |
{ |
71 |
int ret, rcvd = 0; |
int ret, rcvd = 0; |
72 |
struct timeval tv; |
struct timeval tv; |
73 |
fd_set rfds; |
fd_set rfds; |
74 |
|
|
75 |
STREAM_SIZE(conn->in, length); |
if (length > in.size) |
76 |
conn->in.end = conn->in.offset = 0; |
{ |
77 |
|
in.data = xrealloc(in.data, length); |
78 |
|
in.size = length; |
79 |
|
} |
80 |
|
|
81 |
|
in.end = in.p = in.data; |
82 |
|
|
83 |
while (length > 0) |
while (length > 0) |
84 |
{ |
{ |
85 |
ui_process_events(conn->wnd, conn); |
ui_process_events(); |
86 |
|
|
87 |
FD_ZERO(&rfds); |
FD_ZERO(&rfds); |
88 |
FD_SET(conn->tcp_socket, &rfds); |
FD_SET(sock, &rfds); |
89 |
tv.tv_sec = 0; |
tv.tv_sec = 0; |
90 |
tv.tv_usec = 100; |
tv.tv_usec = 100; |
91 |
|
|
92 |
ret = select(conn->tcp_socket+1, &rfds, NULL, NULL, &tv); |
ret = select(sock+1, &rfds, NULL, NULL, &tv); |
93 |
|
|
94 |
if (ret) |
if (ret) |
95 |
{ |
{ |
96 |
rcvd = read(conn->tcp_socket, conn->in.data |
rcvd = read(sock, in.end, length); |
|
+ conn->in.end, length); |
|
97 |
|
|
98 |
if (rcvd <= 0) |
if (rcvd <= 0) |
99 |
{ |
{ |
100 |
fprintf(stderr, "read: %s\n", |
STATUS("read: %s\n", strerror(errno)); |
101 |
strerror(errno)); |
return NULL; |
|
return False; |
|
102 |
} |
} |
103 |
|
|
104 |
conn->in.end += rcvd; |
in.end += rcvd; |
105 |
length -= rcvd; |
length -= rcvd; |
106 |
} |
} |
107 |
} |
} |
108 |
|
|
109 |
|
return ∈ |
110 |
|
} |
111 |
|
|
112 |
|
/* Establish a connection on the TCP layer */ |
113 |
|
BOOL tcp_connect(char *server) |
114 |
|
{ |
115 |
|
struct hostent *nslookup; |
116 |
|
struct sockaddr_in servaddr; |
117 |
|
int true = 1; |
118 |
|
|
119 |
|
if ((nslookup = gethostbyname(server)) != NULL) |
120 |
|
{ |
121 |
|
memcpy(&servaddr.sin_addr, nslookup->h_addr, sizeof(servaddr.sin_addr)); |
122 |
|
} |
123 |
|
else if (!inet_aton(server, &servaddr.sin_addr)) |
124 |
|
{ |
125 |
|
STATUS("%s: unable to resolve host\n", server); |
126 |
|
return False; |
127 |
|
} |
128 |
|
|
129 |
|
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) |
130 |
|
{ |
131 |
|
STATUS("socket: %s\n", strerror(errno)); |
132 |
|
return False; |
133 |
|
} |
134 |
|
|
135 |
|
servaddr.sin_family = AF_INET; |
136 |
|
servaddr.sin_port = htons(TCP_PORT_RDP); |
137 |
|
|
138 |
|
if (connect(sock, (struct sockaddr *)&servaddr, sizeof(struct sockaddr)) < 0) |
139 |
|
{ |
140 |
|
STATUS("connect: %s\n", strerror(errno)); |
141 |
|
close(sock); |
142 |
|
return False; |
143 |
|
} |
144 |
|
|
145 |
|
setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &true, sizeof(true)); |
146 |
|
|
147 |
|
in.size = 4096; |
148 |
|
in.data = xmalloc(in.size); |
149 |
|
|
150 |
|
out.size = 4096; |
151 |
|
out.data = xmalloc(out.size); |
152 |
|
|
153 |
return True; |
return True; |
154 |
} |
} |
155 |
|
|
156 |
|
/* Disconnect on the TCP layer */ |
157 |
|
void tcp_disconnect() |
158 |
|
{ |
159 |
|
close(sock); |
160 |
|
} |