74 |
|
|
75 |
/* Receive a message on the TCP layer */ |
/* Receive a message on the TCP layer */ |
76 |
STREAM |
STREAM |
77 |
tcp_recv(uint32 length) |
tcp_recv(STREAM s, uint32 length) |
78 |
{ |
{ |
79 |
|
unsigned int new_length, end_offset, p_offset; |
80 |
int rcvd = 0; |
int rcvd = 0; |
81 |
|
|
82 |
if (length > in.size) |
if (s == NULL) |
83 |
{ |
{ |
84 |
in.data = (uint8 *) xrealloc(in.data, length); |
/* read into "new" stream */ |
85 |
in.size = length; |
if (length > in.size) |
86 |
|
{ |
87 |
|
in.data = (uint8 *) xrealloc(in.data, length); |
88 |
|
in.size = length; |
89 |
|
} |
90 |
|
in.end = in.p = in.data; |
91 |
|
s = ∈ |
92 |
|
} |
93 |
|
else |
94 |
|
{ |
95 |
|
/* append to existing stream */ |
96 |
|
new_length = (s->end - s->data) + length; |
97 |
|
if (new_length > s->size) |
98 |
|
{ |
99 |
|
p_offset = s->p - s->data; |
100 |
|
end_offset = s->end - s->data; |
101 |
|
s->data = (uint8 *) xrealloc(s->data, new_length); |
102 |
|
s->size = new_length; |
103 |
|
s->p = s->data + p_offset; |
104 |
|
s->end = s->data + end_offset; |
105 |
|
} |
106 |
} |
} |
|
|
|
|
in.end = in.p = in.data; |
|
107 |
|
|
108 |
while (length > 0) |
while (length > 0) |
109 |
{ |
{ |
111 |
/* User quit */ |
/* User quit */ |
112 |
return NULL; |
return NULL; |
113 |
|
|
114 |
rcvd = recv(sock, in.end, length, 0); |
rcvd = recv(sock, s->end, length, 0); |
115 |
if (rcvd == -1) |
if (rcvd < 0) |
116 |
{ |
{ |
117 |
error("recv: %s\n", strerror(errno)); |
error("recv: %s\n", strerror(errno)); |
118 |
return NULL; |
return NULL; |
119 |
} |
} |
120 |
|
else if (rcvd == 0) |
121 |
|
{ |
122 |
|
error("Connection closed\n"); |
123 |
|
return NULL; |
124 |
|
} |
125 |
|
|
126 |
in.end += rcvd; |
s->end += rcvd; |
127 |
length -= rcvd; |
length -= rcvd; |
128 |
} |
} |
129 |
|
|
130 |
return ∈ |
return s; |
131 |
} |
} |
132 |
|
|
133 |
/* Establish a connection on the TCP layer */ |
/* Establish a connection on the TCP layer */ |
134 |
BOOL |
BOOL |
135 |
tcp_connect(char *server) |
tcp_connect(char *server) |
136 |
{ |
{ |
137 |
|
int true_value = 1; |
138 |
|
|
139 |
|
#ifdef IPv6 |
140 |
|
|
141 |
|
int n; |
142 |
|
struct addrinfo hints, *res, *ressave; |
143 |
|
char tcp_port_rdp_s[10]; |
144 |
|
|
145 |
|
snprintf(tcp_port_rdp_s, 10, "%d", tcp_port_rdp); |
146 |
|
|
147 |
|
memset(&hints, 0, sizeof(struct addrinfo)); |
148 |
|
hints.ai_family = AF_UNSPEC; |
149 |
|
hints.ai_socktype = SOCK_STREAM; |
150 |
|
|
151 |
|
n = getaddrinfo(server, tcp_port_rdp_s, &hints, &res); |
152 |
|
|
153 |
|
if (n < 0) |
154 |
|
{ |
155 |
|
error("getaddrinfo: %s\n", gai_strerror(n)); |
156 |
|
return False; |
157 |
|
} |
158 |
|
|
159 |
|
ressave = res; |
160 |
|
sock = -1; |
161 |
|
while (res) |
162 |
|
{ |
163 |
|
sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol); |
164 |
|
if (!(sock < 0)) |
165 |
|
{ |
166 |
|
if (connect(sock, res->ai_addr, res->ai_addrlen) == 0) |
167 |
|
break; |
168 |
|
close(sock); |
169 |
|
sock = -1; |
170 |
|
} |
171 |
|
res = res->ai_next; |
172 |
|
} |
173 |
|
freeaddrinfo(ressave); |
174 |
|
|
175 |
|
if (sock == -1) |
176 |
|
{ |
177 |
|
error("%s: unable to connect\n", server); |
178 |
|
return False; |
179 |
|
} |
180 |
|
|
181 |
|
#else /* no IPv6 support */ |
182 |
|
|
183 |
struct hostent *nslookup; |
struct hostent *nslookup; |
184 |
struct sockaddr_in servaddr; |
struct sockaddr_in servaddr; |
|
int true_value = 1; |
|
185 |
|
|
186 |
if ((nslookup = gethostbyname(server)) != NULL) |
if ((nslookup = gethostbyname(server)) != NULL) |
187 |
{ |
{ |
209 |
return False; |
return False; |
210 |
} |
} |
211 |
|
|
212 |
|
#endif /* IPv6 */ |
213 |
|
|
214 |
setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void *) &true_value, sizeof(true_value)); |
setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void *) &true_value, sizeof(true_value)); |
215 |
|
|
216 |
in.size = 4096; |
in.size = 4096; |