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 memset(&sin, 0, sizeof(sin));
48 sin.sin_family = AF_INET;
50 pse = getservbyname(service, protocol);
52 sin.sin_port = pse->s_port;
53 } else if ((sin.sin_port = htons((u_short) atoi(service))) == 0) {
54 lprintf(CTDL_CRIT, "Can't get %s service entry: %s\n",
55 service, strerror(errno));
58 phe = gethostbyname(host);
60 memcpy(&sin.sin_addr, phe->h_addr, phe->h_length);
61 } else if ((sin.sin_addr.s_addr = inet_addr(host)) == INADDR_NONE) {
62 lprintf(CTDL_ERR, "Can't get %s host entry: %s\n",
63 host, strerror(errno));
66 if ((ppe = getprotobyname(protocol)) == 0) {
67 lprintf(CTDL_CRIT, "Can't get %s protocol entry: %s\n",
68 protocol, strerror(errno));
71 if (!strcmp(protocol, "udp")) {
77 s = socket(PF_INET, type, ppe->p_proto);
79 lprintf(CTDL_CRIT, "Can't create socket: %s\n", strerror(errno));
83 if (connect(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
84 lprintf(CTDL_ERR, "Can't connect to %s:%s: %s\n",
85 host, service, strerror(errno));
96 * sock_read_to() - input binary data from socket, with a settable timeout.
97 * Returns the number of bytes read, or -1 for error.
99 int sock_read_to(int sock, char *buf, int bytes, int timeout)
113 retval = select(sock+1, &rfds, NULL, NULL, &tv);
115 if (FD_ISSET(sock, &rfds) == 0) { /* timed out */
116 lprintf(CTDL_ERR, "sock_read() timed out.\n");
120 rlen = read(sock, &buf[len], bytes-len);
122 lprintf(CTDL_ERR, "sock_read() failed: %s\n",
133 * sock_read() - input binary data from socket.
134 * Returns the number of bytes read, or -1 for error.
136 INLINE int sock_read(int sock, char *buf, int bytes)
138 return sock_read_to(sock, buf, bytes, CLIENT_TIMEOUT);
143 * sock_write() - send binary to server.
144 * Returns the number of bytes written, or -1 for error.
146 int sock_write(int sock, char *buf, int nbytes)
148 int bytes_written = 0;
150 while (bytes_written < nbytes) {
151 retval = write(sock, &buf[bytes_written],
152 nbytes - bytes_written);
156 bytes_written = bytes_written + retval;
158 return (bytes_written);
164 * Input string from socket - implemented in terms of sock_read()
167 int sock_gets(int sock, char *buf)
171 /* Read one character at a time.
174 if (sock_read(sock, &buf[i], 1) < 0) return(-1);
175 if (buf[i] == '\n' || i == (SIZ-1))
179 /* If we got a long line, discard characters until the newline.
182 while (buf[i] != '\n')
183 if (sock_read(sock, &buf[i], 1) < 0) return(-1);
185 /* Strip any trailing CR and LF characters.
188 while ( (strlen(buf)>0)
189 && ((buf[strlen(buf)-1]==13)
190 || (buf[strlen(buf)-1]==10)) ) {
191 buf[strlen(buf)-1] = 0;
197 * Multiline version of sock_gets() ... this is a convenience function for
198 * client side protocol implementations. It only returns the first line of
199 * a multiline response, discarding the rest.
201 int ml_sock_gets(int sock, char *buf) {
205 g = sock_gets(sock, buf);
206 if (g < 4) return(g);
207 if (buf[3] != '-') return(g);
210 g = sock_gets(sock, bigbuf);
211 if (g < 0) return(g);
212 } while ( (g >= 4) && (bigbuf[3] == '-') );
219 * sock_puts() - send line to server - implemented in terms of serv_write()
220 * Returns the number of bytes written, or -1 for error.
222 int sock_puts(int sock, char *buf)
226 i = sock_write(sock, buf, strlen(buf));
228 j = sock_write(sock, "\n", 1);