📄 dgclibcast5.lc
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#include "unp.h"## 1 ##src/bcast/dgclibcast5.c###include <setjmp.h>## 2 ##src/bcast/dgclibcast5.c##static void recvfrom_alarm(int);## 3 ##src/bcast/dgclibcast5.c##static sigjmp_buf jmpbuf;## 4 ##src/bcast/dgclibcast5.c##void## 5 ##src/bcast/dgclibcast5.c##dg_cli(FILE *fp, int sockfd, const SA *pservaddr, socklen_t servlen)## 6 ##src/bcast/dgclibcast5.c##{## 7 ##src/bcast/dgclibcast5.c## int n;## 8 ##src/bcast/dgclibcast5.c## const int on = 1;## 9 ##src/bcast/dgclibcast5.c## char sendline[MAXLINE], recvline[MAXLINE + 1];## 10 ##src/bcast/dgclibcast5.c## socklen_t len;## 11 ##src/bcast/dgclibcast5.c## struct sockaddr *preply_addr;## 12 ##src/bcast/dgclibcast5.c## preply_addr = Malloc(servlen);## 13 ##src/bcast/dgclibcast5.c## Setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on));## 14 ##src/bcast/dgclibcast5.c## Signal(SIGALRM, recvfrom_alarm);## 15 ##src/bcast/dgclibcast5.c## while (Fgets(sendline, MAXLINE, fp) != NULL) {## 16 ##src/bcast/dgclibcast5.c## Sendto(sockfd, sendline, strlen(sendline), 0, pservaddr, servlen);## 17 ##src/bcast/dgclibcast5.c## alarm(5);## 18 ##src/bcast/dgclibcast5.c## for (;;) {## 19 ##src/bcast/dgclibcast5.c## if (sigsetjmp(jmpbuf, 1) != 0)## 20 ##src/bcast/dgclibcast5.c## break;## 21 ##src/bcast/dgclibcast5.c## len = servlen;## 22 ##src/bcast/dgclibcast5.c## n = Recvfrom(sockfd, recvline, MAXLINE, 0, preply_addr, &len);## 23 ##src/bcast/dgclibcast5.c## recvline[n] = 0; /* null terminate */## 24 ##src/bcast/dgclibcast5.c## printf("from %s: %s",## 25 ##src/bcast/dgclibcast5.c## Sock_ntop_host(preply_addr, len), recvline);## 26 ##src/bcast/dgclibcast5.c## }## 27 ##src/bcast/dgclibcast5.c## }## 28 ##src/bcast/dgclibcast5.c##}## 29 ##src/bcast/dgclibcast5.c##static void## 30 ##src/bcast/dgclibcast5.c##recvfrom_alarm(int signo)## 31 ##src/bcast/dgclibcast5.c##{## 32 ##src/bcast/dgclibcast5.c## siglongjmp(jmpbuf, 1);## 33 ##src/bcast/dgclibcast5.c##}## 34 ##src/bcast/dgclibcast5.c##
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