diff options
Diffstat (limited to 'qarsh/sockutil.c')
-rw-r--r-- | qarsh/sockutil.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/qarsh/sockutil.c b/qarsh/sockutil.c new file mode 100644 index 0000000..e5ac22e --- /dev/null +++ b/qarsh/sockutil.c @@ -0,0 +1,81 @@ +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <string.h> +#include <netdb.h> +#include <errno.h> +#include <syslog.h> + +/* Some generic socket related functions to make things easier */ + +int +getsockport(int sd) +{ + struct sockaddr_in addr; + socklen_t addrlen; + + addrlen = sizeof addr; + if (getsockname(sd, (struct sockaddr *)&addr, &addrlen) == 0) { + return ntohs(addr.sin_port); + } else { + return -1; + } +} + +int +bind_any(int minport) +{ + int sd; + struct sockaddr_in addr; + + sd = socket(AF_INET, SOCK_STREAM, 0); + if (sd == -1) return -1; + addr.sin_family = AF_INET; + addr.sin_addr.s_addr = htonl(INADDR_ANY); + do { + addr.sin_port = htons(minport++); + } while (bind(sd, (struct sockaddr *)&addr, sizeof addr) != 0); + if (listen(sd, 0) == -1) { + syslog(LOG_WARNING, "listen error %d, %s", errno, + strerror(errno)); + } + return sd; +} + +int +connect_to_host(char *hostname, int port) +{ + struct hostent *h; + struct sockaddr_in haddr; + int sd; + + h = gethostbyname(hostname); + haddr.sin_family = h->h_addrtype; + haddr.sin_port = htons(port); + memcpy(&haddr.sin_addr, h->h_addr, h->h_length); + + sd = socket(PF_INET, SOCK_STREAM, 0); + if (sd == -1) return -1; + if (connect(sd, (struct sockaddr *)&haddr, sizeof haddr) == -1) { + return -1; + } + return sd; +} + +int +connect_to_peer(struct sockaddr_in *peer, int port) +{ + struct sockaddr_in in_peer; + int sd; + + in_peer.sin_family = AF_INET; + in_peer.sin_port = htons(port); + in_peer.sin_addr = peer->sin_addr; + + sd = socket(PF_INET, SOCK_STREAM, 0); + if (sd == -1) return -1; + if (connect(sd, (struct sockaddr *)&in_peer, sizeof in_peer) == -1) { + return -1; + } + return sd; +} |