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root/i-scream/projects/cms/source/ihost/ihost.c

Comparing projects/cms/source/ihost/ihost.c (file contents):
Revision 1.2 by pajs, Fri May 10 20:05:05 2002 UTC vs.
Revision 1.7 by pajs, Mon May 13 09:22:02 2002 UTC

#	Line 8 | Line 8
8		#include <netdb.h>
9		#include <strings.h>
10
11	+	#define RECONFIGURE_RETURN_CODE 2
12	+
13		typedef struct{
14		int fm_port;
15		char *fm_host;
#	Line 16 | Line 18 | typedef struct{
18		char *server_fqdn;
19		int server_udp_port;
20		int server_tcp_port;
21	<	long last_modified;
21	>	char *last_modified;
22		char *files_list;
23		char *key;
24		int udp_update_time;
#	Line 24 | Line 26 | typedef struct{
26
27		}ihost_state_t;
28
29	<	char* sock_comm(FILE *f_r, FILE *f_w, char* sendString){
29	>	char* sock_comm(FILE *f_r, FILE *f_w, char *sendString){
30		char *reply;
31	<	fprintf(f_w, "%s", sendString);
31	>	fprintf(f_w, "%s\n", sendString);
32		fflush(f_w);
33		reply=fpgetline(f_r);
34		/* Returns pointer to static buffer */
#	Line 41 | Line 43 | int ihost_configure(ihost_state_t *ihost_state){
43		char *reply;
44		char *reply_ptr;
45
46	+	/* Check to see if anything needs to be free'd */
47	+	if (ihost_state->my_fqdn!=NULL) free(ihost_state->my_fqdn);
48	+	if (ihost_state->server_fqdn!=NULL) free(ihost_state->server_fqdn);
49	+	if (ihost_state->last_modified!=NULL) free(ihost_state->last_modified);
50	+	if (ihost_state->files_list!=NULL) free(ihost_state->files_list);
51	+
52		if ((sd = socket(AF_INET, SOCK_STREAM, PF_UNSPEC)) < 0) {
53		errf("Can't create AF_INET socket (%m)");
54		return -1;
#	Line 72 | Line 80 | int ihost_configure(ihost_state_t *ihost_state){
80		return -1;
81		}
82
83	<	reply=sock_comm(fm_fd_r, fm_fd_w, "STARTCONFIG\n");
83	>	reply=sock_comm(fm_fd_r, fm_fd_w, "STARTCONFIG");
84		if ((reply==NULL) || (strncasecmp(reply, "OK", 2) != 0) ) {
85		errf("Server error");
86		return -1;
87		}
88
89	<	reply=sock_comm(fm_fd_r, fm_fd_w, "LASTMODIFIED\n");
89	>	reply=sock_comm(fm_fd_r, fm_fd_w, "LASTMODIFIED");
90		if((reply== NULL) || (strncasecmp(reply, "ERROR", 5) ==0)){
91		errf("Server error (%m)");
92		return -1;
93		}
94	<	ihost_state->last_modified=atol(reply);
94	>	if((ihost_state->last_modified=strdup(reply)) == NULL){
95	>	errf("strdup failed (%m)");
96	>	return -1;
97	>	}
98
99	<	reply=sock_comm(fm_fd_r, fm_fd_w, "FILELIST\n");
99	>	reply=sock_comm(fm_fd_r, fm_fd_w, "FILELIST");
100		if((reply== NULL) || (strncasecmp(reply, "ERROR", 5) ==0)){
101		errf("Server error (%m)");
102		return -1;
103		}
104	<	if((ihost_state->files_list=strdup(reply)) == NULL){
105	<	errf("strdup failed (%m)");
106	<	return -1;
107	<	}
104	>	if((ihost_state->files_list=strdup(reply)) == NULL){
105	>	errf("strdup failed (%m)");
106	>	return -1;
107	>	}
108
109	<	reply=sock_comm(fm_fd_r, fm_fd_w, "FQDN\n");
109	>	reply=sock_comm(fm_fd_r, fm_fd_w, "FQDN");
110		if((reply== NULL) || (strncasecmp(reply, "ERROR", 5)==0)){
111		errf("Server error (%m)");
112		return -1;
#	Line 105 | Line 116 | int ihost_configure(ihost_state_t *ihost_state){
116		return -1;
117		}
118
119	<	reply=sock_comm(fm_fd_r, fm_fd_w, "UDPUpdateTime\n");
119	>	reply=sock_comm(fm_fd_r, fm_fd_w, "UDPUpdateTime");
120		if(reply== NULL){
121		errf("Server error (%m)");
122		return -1;
#	Line 114 | Line 125 | int ihost_configure(ihost_state_t *ihost_state){
125		ihost_state->udp_update_time=atoi(reply);
126		}
127
128	<	reply=sock_comm(fm_fd_r, fm_fd_w, "TCPUpdateTime\n");
128	>	reply=sock_comm(fm_fd_r, fm_fd_w, "TCPUpdateTime");
129		if(reply== NULL){
130		errf("Server error (%m)");
131		return -1;
#	Line 123 | Line 134 | int ihost_configure(ihost_state_t *ihost_state){
134		ihost_state->tcp_update_time=atoi(reply);
135		}
136
137	<	reply=sock_comm(fm_fd_r, fm_fd_w, "ENDCONFIG\n");
137	>	reply=sock_comm(fm_fd_r, fm_fd_w, "ENDCONFIG");
138		if(reply== NULL){
139		errf("Server error (%m)");
140		return -1;
141		}
142
143	<	reply=sock_comm(fm_fd_r, fm_fd_w, "FILTER\n");
143	>	reply=sock_comm(fm_fd_r, fm_fd_w, "FILTER");
144		if((reply== NULL) || (strncasecmp(reply, "ERROR", 5)==0)){
145		errf("Server error (%m)");
146		return -1;
#	Line 159 | Line 170 | int ihost_configure(ihost_state_t *ihost_state){
170		return -1;
171		}
172
173	<	reply=sock_comm(fm_fd_r, fm_fd_w, "END\n");
173	>	reply=sock_comm(fm_fd_r, fm_fd_w, "END");
174		if((reply== NULL) || (strncasecmp(reply, "ERROR", 5) ==0 )){
175		errf("Server error (%m)");
176		return -1;
#	Line 175 | Line 186 | int ihost_configure(ihost_state_t *ihost_state){
186		}
187
188		return 0;
189	+	}
190
191	+	int heartbeat(ihost_state_t *ihost_state){
192	+	struct sockaddr_in addr;
193	+	struct in_addr haddr;
194	+	int sd;
195	+	FILE *fm_fd_r, *fm_fd_w;
196	+	char *reply;
197	+	int exitcode=0;
198	+
199	+	if ((sd = socket(AF_INET, SOCK_STREAM, PF_UNSPEC)) < 0) {
200	+	errf("Can't create AF_INET socket (%m)");
201	+	return -1;
202	+	}
203	+
204	+	if (get_host_addr(ihost_state->server_fqdn, &haddr) != 0){
205	+	errf("Failed to resolve address %s (%m)", ihost_state->fm_host);
206	+	return -1;
207	+	}
208	+
209	+	memset((char *)&addr, 0, sizeof addr);
210	+	addr.sin_family = AF_INET;
211	+	memcpy((char *)&addr.sin_addr, &haddr, sizeof haddr);
212	+	addr.sin_port =  htons(ihost_state->server_tcp_port);
213	+
214	+	if (connect(sd, (struct sockaddr *)&addr, sizeof addr) != 0) {
215	+	errf("Failed to connect to %s on port %d (%m)", ihost_state->fm_host, ihost_state->fm_port);
216	+	return -1;
217	+	}
218	+
219	+	/* Need to open 2 files, one for reading one for writing, as it gets confused if we only use 1 :) */
220	+	if ((fm_fd_r=fdopen(sd,"r")) == NULL){
221	+	errf("Failed to open stream (%m)");
222	+	return -1;
223	+	}
224	+
225	+	if ((fm_fd_w=fdopen(dup(sd),"w")) == NULL){
226	+	errf("Failed to open stream (%m)");
227	+	return -1;
228	+	}
229	+
230	+	reply=sock_comm(fm_fd_r, fm_fd_w, "HEARTBEAT");
231	+	if ((reply==NULL) || (strncasecmp(reply, "ERROR", 5) == 0) ) {
232	+	errf("Server error");
233	+	return -1;
234	+	}
235	+	if (ihost_state->fm_host!=NULL) free(ihost_state->fm_host);
236	+	reply=sock_comm(fm_fd_r, fm_fd_w, "CONFIG");
237	+	if ((reply==NULL) || (strncasecmp(reply, "ERROR", 5) == 0) ) {
238	+	errf("Server error");
239	+	return -1;
240	+	}
241	+
242	+	reply=sock_comm(fm_fd_r, fm_fd_w, ihost_state->files_list);
243	+	if ((reply==NULL) || (strncasecmp(reply, "OK", 2) != 0) ) {
244	+	errf("Server error");
245	+	return -1;
246	+	}
247	+
248	+	reply=sock_comm(fm_fd_r, fm_fd_w, ihost_state->last_modified);
249	+	if (reply==NULL) {
250	+	errf("Server error");
251	+	return -1;
252	+	}
253	+	if (strncasecmp(reply, "ERROR", 5) == 0){
254	+	/* Means the config has changed */
255	+	exitcode=RECONFIGURE_RETURN_CODE;
256	+	}
257	+	reply=sock_comm(fm_fd_r, fm_fd_w, "KEY");
258	+	if ((reply==NULL) || (strncasecmp(reply, "ERROR", 5) == 0) ) {
259	+	errf("Server error");
260	+	return -1;
261	+	}
262	+	if (ihost_state->key!=NULL) free(ihost_state->key);
263	+
264	+	if((ihost_state->key=strdup(reply)) == NULL){
265	+	errf("strdup failed (%m)");
266	+	return -1;
267	+	}
268	+
269	+	reply=sock_comm(fm_fd_r, fm_fd_w, "ENDHEARTBEAT");
270	+	if((reply== NULL) || (strncasecmp(reply, "ERROR", 5) ==0 )){
271	+	errf("Server error (%m)");
272	+	return -1;
273	+	}
274	+
275	+	if(fclose(fm_fd_r) !=0){
276	+	errf("Failed to close FD (%m)");
277	+	return -1;
278	+	}
279	+	if(fclose(fm_fd_w) !=0){
280	+	errf("Failed to close FD (%m)");
281	+	return -1;
282	+	}
283	+
284	+	return exitcode;
285		}
286
287	<	int main(){
287	>
288	>	int main(int argc, char **argv){
289		ihost_state_t ihost_state;
290	+	int heartbeat_exit;
291	+	int counter=0;
292
184	–	ihost_state.fm_host=strdup("kernow.ukc.ac.uk");
185	–	ihost_state.fm_port=4567;
293
294	+	/* NULL'ify so i can tell if i need to free it or not */
295	+	ihost_state.fm_host=NULL;
296	+	ihost_state.my_fqdn=NULL;
297	+	ihost_state.server_fqdn=NULL;
298	+	ihost_state.last_modified=NULL;
299	+	ihost_state.files_list=NULL;
300	+	ihost_state.key=NULL;
301	+
302	+	errf_set_progname(argv[0]);
303	+	if(argc!=3){
304	+	errf_usage("<host> <port>");
305	+	exit(1);
306	+	}
307	+
308	+	ihost_state.fm_host=argv[1];
309	+	ihost_state.fm_port=atoi(argv[2]);
310	+
311		if(ihost_configure(&ihost_state)!=0){
312		errf("configure failed");
313	+	/* Ok, ideally we prob should have 2 copies of the structure and carry on if this
314	+	happens.. But we dont :) (at the moment) */
315	+	exit(1);
316		}
317
318	+	while(TRUE){
319	+
320	+	heartbeat_exit=heartbeat(&ihost_state);
321	+	if(heartbeat_exit==RECONFIGURE_RETURN_CODE){
322	+	errf("heartbeat needs to be reconfigured");
323	+	ihost_configure(&ihost_state);
324	+	}
325	+	if(heartbeat_exit==-1){
326	+	errf("ah crap");
327	+	exit(1);
328	+	}
329	+	printf("Count : %d\n",counter++);
330	+	printf("waiting %d\n",ihost_state.tcp_update_time);
331	+	sleep(ihost_state.tcp_update_time);
332	+	}
333		return 0;
334		}
335

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