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root/i-scream/projects/cms/source/ihost/ihost.c
Revision: 1.7
Committed: Mon May 13 09:22:02 2002 UTC (22 years ago) by pajs
Content type: text/plain
Branch: MAIN
Changes since 1.6: +21 -28 lines
Log Message:
Make it a little more sane again ;)

File Contents

# User Rev Content
1 pajs 1.1 #include <stdio.h>
2     #include <sys/socket.h>
3     #include <stdlib.h>
4     #include <unistd.h>
5     #include <syslog.h>
6     #include <netinet/in.h>
7     #include <ukcprog.h>
8     #include <netdb.h>
9     #include <strings.h>
10    
11 pajs 1.4 #define RECONFIGURE_RETURN_CODE 2
12    
13 pajs 1.1 typedef struct{
14     int fm_port;
15     char *fm_host;
16    
17     char *my_fqdn;
18     char *server_fqdn;
19     int server_udp_port;
20     int server_tcp_port;
21 pajs 1.4 char *last_modified;
22 pajs 1.1 char *files_list;
23     char *key;
24     int udp_update_time;
25     int tcp_update_time;
26    
27     }ihost_state_t;
28    
29 pajs 1.7 char* sock_comm(FILE *f_r, FILE *f_w, char *sendString){
30 pajs 1.1 char *reply;
31 pajs 1.7 fprintf(f_w, "%s\n", sendString);
32 pajs 1.2 fflush(f_w);
33     reply=fpgetline(f_r);
34 pajs 1.1 /* Returns pointer to static buffer */
35     return reply;
36     }
37    
38     int ihost_configure(ihost_state_t *ihost_state){
39     struct sockaddr_in addr;
40     struct in_addr haddr;
41     int sd;
42 pajs 1.2 FILE *fm_fd_r, *fm_fd_w;
43 pajs 1.1 char *reply;
44 pajs 1.2 char *reply_ptr;
45 pajs 1.1
46 pajs 1.5 /* 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 pajs 1.1 if ((sd = socket(AF_INET, SOCK_STREAM, PF_UNSPEC)) < 0) {
53     errf("Can't create AF_INET socket (%m)");
54     return -1;
55     }
56    
57     if (get_host_addr(ihost_state->fm_host, &haddr) != 0){
58     errf("Failed to resolve address %s (%m)", ihost_state->fm_host);
59     return -1;
60     }
61    
62     memset((char *)&addr, 0, sizeof addr);
63     addr.sin_family = AF_INET;
64     memcpy((char *)&addr.sin_addr, &haddr, sizeof haddr);
65     addr.sin_port = htons(ihost_state->fm_port);
66    
67     if (connect(sd, (struct sockaddr *)&addr, sizeof addr) != 0) {
68     errf("Failed to connect to %s on port %d (%m)", ihost_state->fm_host, ihost_state->fm_port);
69     return -1;
70     }
71    
72 pajs 1.2 /* Need to open 2 files, one for reading one for writing, as it gets confused if we only use 1 :) */
73     if ((fm_fd_r=fdopen(sd,"r")) == NULL){
74     errf("Failed to open stream (%m)");
75     return -1;
76     }
77    
78     if ((fm_fd_w=fdopen(dup(sd),"w")) == NULL){
79 pajs 1.1 errf("Failed to open stream (%m)");
80     return -1;
81     }
82 pajs 1.2
83 pajs 1.7 reply=sock_comm(fm_fd_r, fm_fd_w, "STARTCONFIG");
84 pajs 1.1 if ((reply==NULL) || (strncasecmp(reply, "OK", 2) != 0) ) {
85     errf("Server error");
86     return -1;
87     }
88    
89 pajs 1.7 reply=sock_comm(fm_fd_r, fm_fd_w, "LASTMODIFIED");
90 pajs 1.2 if((reply== NULL) || (strncasecmp(reply, "ERROR", 5) ==0)){
91 pajs 1.1 errf("Server error (%m)");
92     return -1;
93     }
94 pajs 1.7 if((ihost_state->last_modified=strdup(reply)) == NULL){
95     errf("strdup failed (%m)");
96 pajs 1.4 return -1;
97     }
98 pajs 1.1
99 pajs 1.7 reply=sock_comm(fm_fd_r, fm_fd_w, "FILELIST");
100 pajs 1.2 if((reply== NULL) || (strncasecmp(reply, "ERROR", 5) ==0)){
101 pajs 1.1 errf("Server error (%m)");
102     return -1;
103     }
104 pajs 1.7 if((ihost_state->files_list=strdup(reply)) == NULL){
105     errf("strdup failed (%m)");
106 pajs 1.6 return -1;
107     }
108 pajs 1.1
109 pajs 1.7 reply=sock_comm(fm_fd_r, fm_fd_w, "FQDN");
110 pajs 1.2 if((reply== NULL) || (strncasecmp(reply, "ERROR", 5)==0)){
111 pajs 1.1 errf("Server error (%m)");
112     return -1;
113     }
114     if((ihost_state->my_fqdn=strdup(reply)) == NULL){
115     errf("strdup failed (%m)");
116     return -1;
117     }
118    
119 pajs 1.7 reply=sock_comm(fm_fd_r, fm_fd_w, "UDPUpdateTime");
120 pajs 1.1 if(reply== NULL){
121     errf("Server error (%m)");
122     return -1;
123     }
124     if (strncasecmp(reply, "ERROR", 5) != 0){
125     ihost_state->udp_update_time=atoi(reply);
126     }
127    
128 pajs 1.7 reply=sock_comm(fm_fd_r, fm_fd_w, "TCPUpdateTime");
129 pajs 1.1 if(reply== NULL){
130     errf("Server error (%m)");
131     return -1;
132     }
133     if (strncasecmp(reply, "ERROR", 5) != 0){
134     ihost_state->tcp_update_time=atoi(reply);
135     }
136    
137 pajs 1.7 reply=sock_comm(fm_fd_r, fm_fd_w, "ENDCONFIG");
138 pajs 1.1 if(reply== NULL){
139     errf("Server error (%m)");
140     return -1;
141     }
142    
143 pajs 1.7 reply=sock_comm(fm_fd_r, fm_fd_w, "FILTER");
144 pajs 1.2 if((reply== NULL) || (strncasecmp(reply, "ERROR", 5)==0)){
145     errf("Server error (%m)");
146     return -1;
147     }
148     reply_ptr=strchr(reply,';');
149     if (reply_ptr==NULL){
150     errf("Incorrect data returned");
151     return -1;
152     }
153     *reply_ptr='\0';
154     if((ihost_state->server_fqdn=strdup(reply)) == NULL){
155     errf("strdup failed (%m)");
156     return -1;
157     }
158     reply=++reply_ptr;
159     reply_ptr=strchr(reply,';');
160     if (reply_ptr==NULL){
161     errf("Incorrect data returned 2");
162     return -1;
163     }
164     *reply_ptr='\0';
165     ihost_state->server_udp_port=atoi(reply);
166     reply=++reply_ptr;
167     ihost_state->server_tcp_port=atoi(reply);
168     if ((ihost_state->server_tcp_port==0) || (ihost_state->server_udp_port==0)){
169     errf("Incorrect data returned 3 ");
170     return -1;
171     }
172    
173 pajs 1.7 reply=sock_comm(fm_fd_r, fm_fd_w, "END");
174 pajs 1.2 if((reply== NULL) || (strncasecmp(reply, "ERROR", 5) ==0 )){
175     errf("Server error (%m)");
176     return -1;
177     }
178 pajs 1.1
179 pajs 1.2 if(fclose(fm_fd_r) !=0){
180     errf("Failed to close FD (%m)");
181     return -1;
182     }
183     if(fclose(fm_fd_w) !=0){
184     errf("Failed to close FD (%m)");
185     return -1;
186     }
187 pajs 1.1
188     return 0;
189     }
190 pajs 1.4
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 pajs 1.7 reply=sock_comm(fm_fd_r, fm_fd_w, "HEARTBEAT");
231 pajs 1.6 if ((reply==NULL) || (strncasecmp(reply, "ERROR", 5) == 0) ) {
232 pajs 1.4 errf("Server error");
233     return -1;
234     }
235 pajs 1.6 if (ihost_state->fm_host!=NULL) free(ihost_state->fm_host);
236 pajs 1.7 reply=sock_comm(fm_fd_r, fm_fd_w, "CONFIG");
237 pajs 1.6 if ((reply==NULL) || (strncasecmp(reply, "ERROR", 5) == 0) ) {
238 pajs 1.4 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 pajs 1.6 if (strncasecmp(reply, "ERROR", 5) == 0){
254 pajs 1.4 /* Means the config has changed */
255     exitcode=RECONFIGURE_RETURN_CODE;
256     }
257 pajs 1.7 reply=sock_comm(fm_fd_r, fm_fd_w, "KEY");
258 pajs 1.6 if ((reply==NULL) || (strncasecmp(reply, "ERROR", 5) == 0) ) {
259 pajs 1.4 errf("Server error");
260     return -1;
261     }
262 pajs 1.5 if (ihost_state->key!=NULL) free(ihost_state->key);
263    
264 pajs 1.7 if((ihost_state->key=strdup(reply)) == NULL){
265     errf("strdup failed (%m)");
266 pajs 1.4 return -1;
267     }
268    
269 pajs 1.7 reply=sock_comm(fm_fd_r, fm_fd_w, "ENDHEARTBEAT");
270 pajs 1.4 if((reply== NULL) || (strncasecmp(reply, "ERROR", 5) ==0 )){
271     errf("Server error (%m)");
272     return -1;
273     }
274    
275 pajs 1.6 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 pajs 1.4 return exitcode;
285     }
286    
287 pajs 1.1
288 pajs 1.3 int main(int argc, char **argv){
289 pajs 1.2 ihost_state_t ihost_state;
290 pajs 1.6 int heartbeat_exit;
291     int counter=0;
292    
293 pajs 1.5
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 pajs 1.3 errf_set_progname(argv[0]);
303     if(argc!=3){
304     errf_usage("<host> <port>");
305     exit(1);
306     }
307 pajs 1.2
308 pajs 1.3 ihost_state.fm_host=argv[1];
309     ihost_state.fm_port=atoi(argv[2]);
310 pajs 1.2
311     if(ihost_configure(&ihost_state)!=0){
312     errf("configure failed");
313 pajs 1.6 /* 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 pajs 1.2 }
317 pajs 1.5
318 pajs 1.6 while(TRUE){
319 pajs 1.1
320 pajs 1.6 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 pajs 1.1 return 0;
334     }
335