4 * This module handles client-side sockets opened by the Citadel server (for
5 * the client side of Internet protocols, etc.) It does _not_ handle client
6 * sockets for the Citadel client; for that you must look in ipc_c_tcp.c
7 * (which, uncoincidentally, bears a striking similarity to this file).
16 #include <sys/types.h>
18 #include <sys/socket.h>
19 #include <netinet/in.h>
20 #include <arpa/inet.h>
28 #include "serv_extensions.h"
32 #include "sysdep_decls.h"
33 #include <clientsocket.h>
36 #define INADDR_NONE 0xffffffff
39 int sock_connect(char *host, char *service, char *protocol)
44 struct sockaddr_in sin;
47 if (host == NULL) return(-1);
48 if (strlen(host) == 0) return(-1);
49 if (service == NULL) return(-1);
50 if (strlen(service) == 0) return(-1);
51 if (protocol == NULL) return(-1);
52 if (strlen(protocol) == 0) return(-1);
54 memset(&sin, 0, sizeof(sin));
55 sin.sin_family = AF_INET;
57 pse = getservbyname(service, protocol);
59 sin.sin_port = pse->s_port;
60 } else if ((sin.sin_port = htons((u_short) atoi(service))) == 0) {
61 lprintf(CTDL_CRIT, "Can't get %s service entry: %s\n",
62 service, strerror(errno));
65 phe = gethostbyname(host);
67 memcpy(&sin.sin_addr, phe->h_addr, phe->h_length);
68 } else if ((sin.sin_addr.s_addr = inet_addr(host)) == INADDR_NONE) {
69 lprintf(CTDL_ERR, "Can't get %s host entry: %s\n",
70 host, strerror(errno));
73 if ((ppe = getprotobyname(protocol)) == 0) {
74 lprintf(CTDL_CRIT, "Can't get %s protocol entry: %s\n",
75 protocol, strerror(errno));
78 if (!strcmp(protocol, "udp")) {
84 s = socket(PF_INET, type, ppe->p_proto);
86 lprintf(CTDL_CRIT, "Can't create socket: %s\n", strerror(errno));
90 if (connect(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
91 lprintf(CTDL_ERR, "Can't connect to %s:%s: %s\n",
92 host, service, strerror(errno));
103 * sock_read_to() - input binary data from socket, with a settable timeout.
104 * Returns the number of bytes read, or -1 for error.
106 int sock_read_to(int sock, char *buf, int bytes, int timeout)
120 retval = select(sock+1, &rfds, NULL, NULL, &tv);
122 if (FD_ISSET(sock, &rfds) == 0) { /* timed out */
123 lprintf(CTDL_ERR, "sock_read() timed out.\n");
127 rlen = read(sock, &buf[len], bytes-len);
129 lprintf(CTDL_ERR, "sock_read() failed: %s\n",
140 * sock_read() - input binary data from socket.
141 * Returns the number of bytes read, or -1 for error.
143 INLINE int sock_read(int sock, char *buf, int bytes)
145 return sock_read_to(sock, buf, bytes, CLIENT_TIMEOUT);
150 * sock_write() - send binary to server.
151 * Returns the number of bytes written, or -1 for error.
153 int sock_write(int sock, char *buf, int nbytes)
155 int bytes_written = 0;
157 while (bytes_written < nbytes) {
158 retval = write(sock, &buf[bytes_written],
159 nbytes - bytes_written);
163 bytes_written = bytes_written + retval;
165 return (bytes_written);
171 * Input string from socket - implemented in terms of sock_read()
174 int sock_gets(int sock, char *buf)
178 /* Read one character at a time.
181 if (sock_read(sock, &buf[i], 1) < 0) return(-1);
182 if (buf[i] == '\n' || i == (SIZ-1))
186 /* If we got a long line, discard characters until the newline.
189 while (buf[i] != '\n')
190 if (sock_read(sock, &buf[i], 1) < 0) return(-1);
192 /* Strip any trailing CR and LF characters.
195 while ( (strlen(buf)>0)
196 && ((buf[strlen(buf)-1]==13)
197 || (buf[strlen(buf)-1]==10)) ) {
198 buf[strlen(buf)-1] = 0;
204 * Multiline version of sock_gets() ... this is a convenience function for
205 * client side protocol implementations. It only returns the first line of
206 * a multiline response, discarding the rest.
208 int ml_sock_gets(int sock, char *buf) {
212 g = sock_gets(sock, buf);
213 if (g < 4) return(g);
214 if (buf[3] != '-') return(g);
217 g = sock_gets(sock, bigbuf);
218 if (g < 0) return(g);
219 } while ( (g >= 4) && (bigbuf[3] == '-') );
226 * sock_puts() - send line to server - implemented in terms of serv_write()
227 * Returns the number of bytes written, or -1 for error.
229 int sock_puts(int sock, char *buf)
233 i = sock_write(sock, buf, strlen(buf));
235 j = sock_write(sock, "\n", 1);