Difference between revisions of "Socket functions"
From Ilianko
(Created page with "Category:sockets == Byte Order Conversion== *htons() host to network short *htonl() host to network long *ntohs() network to host short *ntohl() network to host long") |
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*ntohs() network to host short | *ntohs() network to host short | ||
*ntohl() network to host long | *ntohl() network to host long | ||
| + | |||
| + | == IP address conversion== | ||
| + | |||
| + | |||
| + | <code><pre> | ||
| + | struct sockaddr_in sa; // IPv4 | ||
| + | struct sockaddr_in6 sa6; // IPv6 | ||
| + | |||
| + | inet_pton(AF_INET, "192.0.2.1", &(sa.sin_addr)); // IPv4 | ||
| + | inet_pton(AF_INET6, "2001:db8:63b3:1::3490", &(sa6.sin6_addr)); // IPv6 | ||
| + | </pre></code> | ||
| + | |||
| + | // IPv4: | ||
| + | char ip4[INET_ADDRSTRLEN]; | ||
| + | struct sockaddr_in sa; | ||
| + | // space to hold the IPv4 string | ||
| + | // pretend this is loaded with something | ||
| + | inet_ntop(AF_INET, &(sa.sin_addr), ip4, INET_ADDRSTRLEN); | ||
| + | printf("The IPv4 address is: %s\n", ip4); | ||
| + | // IPv6: | ||
| + | char ip6[INET6_ADDRSTRLEN]; // space to hold the IPv6 string | ||
| + | struct sockaddr_in6 sa6; | ||
| + | // pretend this is loaded with something | ||
| + | inet_ntop(AF_INET6, &(sa6.sin6_addr), ip6, INET6_ADDRSTRLEN); | ||
| + | printf("The address is: %s\n", ip6); | ||
| + | |||
| + | == getaddrinfo() == | ||
| + | <code><pre> | ||
| + | int getaddrinfo(const char *node, // e.g. "www.example.com" or IP | ||
| + | const char *service, // e.g. "http" or port number | ||
| + | const struct addrinfo *hints, | ||
| + | struct addrinfo **res); | ||
| + | </pre></code> | ||
| + | |||
| + | == socket() == | ||
| + | |||
| + | <code><pre> | ||
| + | int socket(int domain, int type, int protocol); | ||
| + | </pre></code> | ||
| + | |||
| + | == x == | ||
Latest revision as of 14:53, 14 April 2013
Byte Order Conversion
- htons() host to network short
- htonl() host to network long
- ntohs() network to host short
- ntohl() network to host long
IP address conversion
struct sockaddr_in sa; // IPv4
struct sockaddr_in6 sa6; // IPv6
inet_pton(AF_INET, "192.0.2.1", &(sa.sin_addr)); // IPv4
inet_pton(AF_INET6, "2001:db8:63b3:1::3490", &(sa6.sin6_addr)); // IPv6
// IPv4: char ip4[INET_ADDRSTRLEN]; struct sockaddr_in sa; // space to hold the IPv4 string // pretend this is loaded with something inet_ntop(AF_INET, &(sa.sin_addr), ip4, INET_ADDRSTRLEN); printf("The IPv4 address is: %s\n", ip4); // IPv6: char ip6[INET6_ADDRSTRLEN]; // space to hold the IPv6 string struct sockaddr_in6 sa6; // pretend this is loaded with something inet_ntop(AF_INET6, &(sa6.sin6_addr), ip6, INET6_ADDRSTRLEN); printf("The address is: %s\n", ip6);
getaddrinfo()
int getaddrinfo(const char *node, // e.g. "www.example.com" or IP
const char *service, // e.g. "http" or port number
const struct addrinfo *hints,
struct addrinfo **res);
socket()
int socket(int domain, int type, int protocol);
