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127 lines
3.1 KiB
C
127 lines
3.1 KiB
C
#include "easysock.h"
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int create_socket(int network, char transport) {
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int domain;
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int type;
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if (network == 4) {
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domain = AF_INET;
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} else if (network == 6) {
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domain = AF_INET6;
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} else {
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return -1;
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}
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if (transport == 'T') {
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type = SOCK_STREAM;
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} else if (transport == 'U') {
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type = SOCK_DGRAM;
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} else {
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return -1;
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}
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int newSock = socket(domain,type,0);
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return newSock;
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}
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void create_addr(int network, char* address, int port,struct sockaddr* dest) {
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if (network == 4) {
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struct sockaddr_in listen_address;
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listen_address.sin_family = AF_INET;
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listen_address.sin_port = htons(port);
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inet_pton(AF_INET,address,&listen_address.sin_addr);
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memcpy(dest,&listen_address,sizeof(listen_address));
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return;
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} else if (network == 6) {
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struct sockaddr_in6 listen_ipv6;
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listen_ipv6.sin6_family = AF_INET6;
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listen_ipv6.sin6_port = htons(port);
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inet_pton(AF_INET6,address,&listen_ipv6.sin6_addr);
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memcpy(dest,&listen_ipv6,sizeof(listen_ipv6));
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return;
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} else {
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exit(202);
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}
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}
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int create_local (int network, char transport, char* address, int port,struct sockaddr* addr_struct) {
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int socket = create_socket(network,transport);
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if (socket < 0) {
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exit(errno);
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}
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create_addr(network,address,port,addr_struct);
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int addrlen;
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if (network == 4) {
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addrlen = sizeof(struct sockaddr_in);
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} else if (network == 6) {
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addrlen = sizeof(struct sockaddr_in6);
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} else {
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exit(207);
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}
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/* The value of addrlen should be the size of the 'sockaddr'.
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This should be set to the size of 'sockaddr_in' for IPv4, and 'sockaddr_in6' for IPv6.
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See https://stackoverflow.com/questions/73707162/socket-bind-failed-with-invalid-argument-error-for-program-running-on-macos */
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int i = bind (socket,addr_struct,(socklen_t)addrlen);
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if (i < 0) {
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exit(errno);
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}
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return socket;
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}
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int create_remote (int network,char transport,char* address,int port,struct sockaddr* remote_addr_struct) {
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int socket = create_socket(network,transport);
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if (socket < 0) {
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exit(errno);
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}
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create_addr(network,address,port,remote_addr_struct);
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int addrlen;
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if (network == 4) {
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addrlen = sizeof(struct sockaddr_in);
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} else if (network == 6) {
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addrlen = sizeof(struct sockaddr_in6);
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} else {
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exit(207);
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}
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/* The value of addrlen should be the size of the 'sockaddr'.
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This should be set to the size of 'sockaddr_in' for IPv4, and 'sockaddr_in6' for IPv6.
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See https://stackoverflow.com/questions/73707162/socket-bind-failed-with-invalid-argument-error-for-program-running-on-macos */
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int i = connect(socket,remote_addr_struct,(socklen_t)addrlen);
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if (i < 0) {
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exit(errno);
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}
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return socket;
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}
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int check_ip_ver(char* address) {
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char buffer[16]; /* 16 chars - 128 bits - is enough to hold an ipv6 address */
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if (inet_pton(AF_INET,address,buffer) == 1) {
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return 4;
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} else if (inet_pton(AF_INET6,address,buffer) == 1) {
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return 6;
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} else {
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return -1;
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}
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}
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int int_to_inet(int network) {
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if (network == 4) {
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return AF_INET;
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} else if (network == 6) {
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return AF_INET6;
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} else {
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exit(207);
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}
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}
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