dadada/netcalc
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Chamaeleon 2018-10-29 11:07:42 +01:00
parent 880a77ff65
commit 1665d3140e
1 changed files with 20 additions and 4 deletions
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24
netcalc.c
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@ -16,6 +16,8 @@ int SOCKFD;
int CLIENT; int CLIENT;
/// closes socket, signal handler
/// @param signum
void cleanup(int signum) { void cleanup(int signum) {
if (close(SOCKFD) != 0) { if (close(SOCKFD) != 0) {
perror("close"); perror("close");
@ -23,6 +25,13 @@ void cleanup(int signum) {
exit(1); exit(1);
} }
/// Fills addrinfo with given params
/// @param host
/// @param port to bind
/// @param ainfo the addrinfo struct to fill
/// @param afamily specifies protocol family
/// @param flags
/// @return 0 if success, -1 if stderr
int prepaddr(char *host, char *port, struct addrinfo **ainfo, int afamily, int flags) { int prepaddr(char *host, char *port, struct addrinfo **ainfo, int afamily, int flags) {
struct addrinfo hints; // hints to what we want struct addrinfo hints; // hints to what we want
memset(&hints, 0, sizeof hints); memset(&hints, 0, sizeof hints);
@ -39,14 +48,18 @@ int prepaddr(char *host, char *port, struct addrinfo **ainfo, int afamily, int f
return 0; return 0;
} }
/// Binds to sockd
/// @param sockd the socket to bind to
/// @param ainfo information for binding
/// @return sockd freshly bound socket or -1 if error
int bindsocket(int sockd, struct addrinfo *ainfo) { int bindsocket(int sockd, struct addrinfo *ainfo) {
if (bind(SOCKFD, ainfo->ai_addr, ainfo->ai_addrlen) != 0) { if (bind(sockd, ainfo->ai_addr, ainfo->ai_addrlen) != 0) {
perror("bind"); perror("bind");
cleanup(0); cleanup(0);
return -1; return -1;
} }
if (listen(SOCKFD, 5) != 0) { if (listen(sockd, 5) != 0) {
perror("listen"); perror("listen");
cleanup(0); cleanup(0);
return -1; return -1;
@ -54,6 +67,9 @@ int bindsocket(int sockd, struct addrinfo *ainfo) {
return sockd; return sockd;
} }
/// Prepares SOCKFD socket for further use
/// @param ainfo addrinfo struct to configure SOCKFD
/// @returns SOCKFD if successfull
int prepsocket(struct addrinfo *ainfo) { int prepsocket(struct addrinfo *ainfo) {
SOCKFD = socket(ainfo->ai_family, ainfo->ai_socktype, ainfo->ai_protocol); SOCKFD = socket(ainfo->ai_family, ainfo->ai_socktype, ainfo->ai_protocol);
@ -273,7 +289,7 @@ int main(int argc, char *argv[]) {
char* host = NULL; char* host = NULL;
char* port = "5000"; char* port = "5000";
int afamiliy = AF_UNSPEC; int afamiliy = AF_UNSPEC; /// should do v4 and v6 compatibility
int flags = 0; int flags = 0;
if (argc > 1 && strcmp(argv[1], "-c") == 0) { if (argc > 1 && strcmp(argv[1], "-c") == 0) {
@ -289,7 +305,7 @@ int main(int argc, char *argv[]) {
return 0; return 0;
} else { } else {
CLIENT = 0; CLIENT = 0;
afamiliy = AF_INET6; afamiliy = AF_UNSPEC;
flags |= AI_PASSIVE; flags |= AI_PASSIVE;
if (argc > 1) { if (argc > 1) {
port = argv[1]; port = argv[1];