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|
| | tcpdump -A -u port 9877 -i iface | | tcpdump -A -u port 9877 -i iface |
| | | | |
| − | Modified version of the UDP server linked above, which sends replies: | + | Modified version of the UDP server linked above, which sends replies (and compiles without warnings): |
| | <pre> | | <pre> |
| | #include <arpa/inet.h> | | #include <arpa/inet.h> |
|
|
| | #include <sys/socket.h> | | #include <sys/socket.h> |
| | #include <unistd.h> | | #include <unistd.h> |
| | + | #include <stdlib.h> |
| | + | #include <string.h> |
| | | | |
| | #define BUFLEN 512 | | #define BUFLEN 512 |
| | #define NPACK 10 | | #define NPACK 10 |
| − | #define PORT 9930
| + | #define PORT 9930 |
| | + | |
| | + | void diep(char *s) |
| | + | { |
| | + | perror(s); |
| | + | exit(1); |
| | + | } |
| | | | |
| − | void diep(char *s)
| |
| − | {
| |
| − | perror(s);
| |
| − | exit(1);
| |
| − | }
| |
| | | | |
| − | int main(void)
| + | int main(void) |
| − | {
| + | { |
| − | struct sockaddr_in si_me, si_other;
| + | struct sockaddr_in si_me, si_other; |
| − | int s, i, slen=sizeof(si_other);
| + | int s, i, slen=sizeof(si_other); |
| − | char buf[BUFLEN];
| + | char buf[BUFLEN]; |
| | | | |
| − | if ((s=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP))==-1)
| + | if ((s=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP))==-1) |
| − | diep("socket");
| + | diep("socket"); |
| | | | |
| − | memset((char *) &si_me, 0, sizeof(si_me));
| + | memset((char *) &si_me, 0, sizeof(si_me)); |
| − | si_me.sin_family = AF_INET;
| + | si_me.sin_family = AF_INET; |
| − | si_me.sin_port = htons(PORT);
| + | si_me.sin_port = htons(PORT); |
| − | si_me.sin_addr.s_addr = htonl(INADDR_ANY);
| + | si_me.sin_addr.s_addr = htonl(INADDR_ANY); |
| − | if (bind(s, &si_me, sizeof(si_me))==-1)
| + | if (bind(s, (struct sockaddr*)&si_me, sizeof(si_me))==-1) |
| − | diep("bind");
| + | diep("bind"); |
| | | | |
Exception encountered, of type "Error"