cafc103230
xconnect.c needs #include <netinet/in.h> to compile if CONFIG_FEATURE_IPV6 is not defined
80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Connect to host at port using address resolusion from getaddrinfo
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*
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*/
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include "libbb.h"
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int xconnect(const char *host, const char *port)
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{
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#if CONFIG_FEATURE_IPV6
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struct addrinfo hints;
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struct addrinfo *res;
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struct addrinfo *addr_info;
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int error;
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int s;
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memset(&hints, 0, sizeof(hints));
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/* set-up hints structure */
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hints.ai_family = PF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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error = getaddrinfo(host, port, &hints, &res);
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if (error||!res)
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perror_msg_and_die(gai_strerror(error));
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addr_info=res;
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while (res) {
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s=socket(res->ai_family, res->ai_socktype, res->ai_protocol);
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if (s<0)
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{
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error=s;
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res=res->ai_next;
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continue;
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}
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/* try to connect() to res->ai_addr */
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error = connect(s, res->ai_addr, res->ai_addrlen);
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if (error >= 0)
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break;
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close(s);
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res=res->ai_next;
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}
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freeaddrinfo(addr_info);
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if (error < 0)
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{
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perror_msg_and_die("Unable to connect to remote host (%s)", host);
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}
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return s;
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#else
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struct sockaddr_in s_addr;
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int s = socket(AF_INET, SOCK_STREAM, 0);
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struct servent *tserv;
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int port_nr=atoi(port);
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struct hostent * he;
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if (port_nr==0 && (tserv = getservbyname(port, "tcp")) != NULL)
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port_nr = tserv->s_port;
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memset(&s_addr, 0, sizeof(struct sockaddr_in));
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s_addr.sin_family = AF_INET;
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s_addr.sin_port = htons(port_nr);
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he = xgethostbyname(host);
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memcpy(&s_addr.sin_addr, he->h_addr, sizeof s_addr.sin_addr);
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if (connect(s, (struct sockaddr *)&s_addr, sizeof s_addr) < 0)
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{
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perror_msg_and_die("Unable to connect to remote host (%s)", host);
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}
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return s;
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#endif
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}
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