/* POSIX.1 defines several new functions to allow an application to map
* from a host name and a service name to an address and vice versa.
* These functions replace the older gethostbyname() and gethostbyaddr()
* functions. The getaddrinfo() function allows us to map a host name and
* a service name to an address.
* #include <sys/socket.h>
* #include <netdb.h>
* int getaddrinfo(const char *host, const char *service,
* const struct *hint, struct addrinfo **res);
* Returns: 0 if OK, nonzero error code on error
* void freeaddrinfo(struct addrinfo *ai);
*
* We need to provide the host name, the service name, or both. If we
* provide only one name, the other should be a null pointer. The host
* name can be either a node name or the host address in dotted-decimal
* notation. 如 www.baidu.com, www.google.com 等
* The getaddrinfo() function returns a linked list of addrinfo structures.
* We can use freeaddrinfo() to free one or more of these structures,
* depending on how many structures are linked together using the ai_next
* field. The addrinfo structure is defined to include at least the
* following members:
* struct addrinfo {
* int ai_flags; // customize behavior
* int ai_family; // address family
* int ai_socktype; // socket type
* int ai_protocol; // protocol
* socklen_t ai_addrlen; // length in bytes of address
* struct sockaddr *ai_addr; // address
* char *ai_canonname; // canonical name of host
* struct addrinfo *ai_next; // next in list
* };
*
* We can supply an optional hint to select addresses that meet certain
* criteria. The hint is a template used for filtering addresses and uses
* only the ai_family, ai_flags, ai_protocol, and ai_socktype fields. The
* remainning integer fields must be set to 0, and the pointer fields must
* be null.
*
* If getaddrinfo() fails, we can't use perror() or strerror() to generate
* an error message. Instead, we need to call gai_strerror() to convert
* the error code returned into an error message.
* #include <netdb.h>
* const char *gai_strerror(int error);
* Returns: a pointer to a string describing the error
*
* getaddrinfo() 函数的host参数可以是本地的主机名(通过hostname命令来获取),
* 也可以是网络上的域名,如www.baidu.com, www.google.com 等,此时就能获取
* 到www.baidu.com对应的地址信息,如ip地址,服务的端口地址,协议类型等.
*
* The getnameinfo() function converts an address into a host name and
* a service name.
* #include <sys/socket.h>
* #include <netdb.h>
* int getnameinfo(const struct sockaddr *addr, socklen_t alen, char *host,
* socklen_t hostlen, char *service, socklen_t servlen,
* unsigned int flags);
* Returns: 0 if OK, nonzero on error
* The socket address (addr) is translated into a host name and a service
* name. If host is non-null, it points to a buffer hostlen bytes long
* that will be used to return the host name. Similarly, if service is
* non-null, it points to a buffer servlen bytes long that will be used to
* return the service name.
*
* The flags argument gives us some control over how the translation is done
*/
int main(int argc, char *argv[])
{
struct addrinfo *aliases, *aip;
struct addrinfo hint;
struct sockaddr_in *sinp;
const char *addr;
int err;
char abuf[INET_ADDRSTRLEN];
if (argc != 3) {
printf("usage: %s nodename servicename\n", argv[0]);
return 1;
}
hint.ai_flags = AI_CANONNAME;
hint.ai_family = 0;
hint.ai_socktype = 0;
hint.ai_protocol = 0;
hint.ai_addrlen = 0;
hint.ai_addr = NULL;
hint.ai_canonname = NULL;
hint.ai_next = NULL;
if ((err = getaddrinfo(argv[1], argv[2], &hint, &aliases)) != 0) {
printf("getaddrinfo error: %s\n", gai_strerror(err));
return 1;
}
/* If multiple protocols provide the given service for the given host,
* the program will print more than one entry.
*/
for (aip = aliases; aip != NULL; aip = aip->ai_next) {
print_flags(aip);
print_family(aip);
print_type(aip);
print_protocol(aip);
printf("\n\thost: %s", aip->ai_canonname?aip->ai_canonname:"-");
if (aip->ai_family == AF_INET) {
sinp = (struct sockaddr_in *)aip->ai_addr;
/* inet_ntop() 函数返回 const char * 类型指针,所以 addr 也要
* 定义为 const char * 类型,否则编译报警:
* assignment discards qualifiers from pointer target type
*/
addr = inet_ntop(AF_INET, &sinp->sin_addr, abuf,
INET_ADDRSTRLEN);
printf(", address: %s", addr ? addr : "unknown");
printf(", port: %d", ntohs(sinp->sin_port));
}
printf("\n");
}
freeaddrinfo(aliases);
return 0;
}
int main(int argc, char *argv[])
{
struct addrinfo *ailist, *aip;
struct addrinfo hint;
struct sockaddr_in *sinp;
const char *addr;
int err;
char abuf[INET_ADDRSTRLEN];
if (argc != 3)
{
printf("usage: %s nodename service\n", argv[0]);
exit(0);
}
hint.ai_flags = AI_CANONNAME;
hint.ai_family = 0;
hint.ai_socktype = 0;
hint.ai_protocol = 0;
hint.ai_addrlen = 0;
hint.ai_canonname = NULL;
hint.ai_addr = NULL;
hint.ai_next = NULL;
if ((err = getaddrinfo(argv[1], argv[2], &hint, &ailist)) != 0)
{
printf("getaddrinfo error: %s", gai_strerror(err));
exit(0);
}
for (aip = ailist; aip != NULL; aip = aip->ai_next)
{
printf("~~~~~~~~~~~~~~~~~~~~~~~~\n");
print_flags(aip);
print_family(aip);
print_type(aip);
print_protocol(aip);
printf("\n\thost %s", aip->ai_canonname?aip->ai_canonname:"-");
if (aip->ai_family == AF_INET)
{
sinp = (struct sockaddr_in *)aip->ai_addr;
addr = inet_ntop(AF_INET, &sinp->sin_addr, abuf, INET_ADDRSTRLEN);
printf(" address %s", addr?addr:"unknown");
printf(" port %d", ntohs(sinp->sin_port));
}
printf("\n");
}
exit(0);
}
void print_addrinfo(struct addrinfo *aip) {
print_flags(aip);
putchar('\n');
print_family(aip);
putchar('\n');
print_type(aip);
putchar('\n');
print_proto(aip);
putchar('\n');
printf("host: %s", aip->ai_canonname ? aip->ai_canonname : "-");
putchar('\n');
if (aip->ai_family == AF_INET) {
struct sockaddr_in *sinp = (struct sockaddr_in *)aip->ai_addr;
char abuf[INET_ADDRSTRLEN];
const char *addr = inet_ntop(AF_INET, &sinp->sin_addr, abuf,
INET_ADDRSTRLEN);
printf("address: %s\n", addr ? addr : "unknown");
printf("port: %d\n", ntohs(sinp->sin_port));
}
putchar('\n');
}
void
ofm_read_simple(void)
{
if (ofm_on==TRUE) {
print_ofm_level(ofm_level-1);
print_font_dir(font_dir);
}
header = (char *) ofm+check_sum_pos;
retrieve_header();
print_family();
print_face();
print_coding_scheme();
print_design_size();
out("(COMMENT DESIGNSIZE IS IN POINTS)"); out_ln();
out("(COMMENT OTHER SIZES ARE MULTIPLES OF DESIGNSIZE)"); out_ln();
print_check_sum();
if ((seven_bit == TRUE) || (ofm_level != OFM_TFM))
print_seven_bit_safe_flag();
retrieve_parameters(ofm+(4*param_base));
print_parameters();
}
int dump_device_file(char *dumpdir) {
char fname[255], fbase[255], *p;
FILE *f, *fcfg;
int i;
/* create diretory */
strcpy(fname, "mkdir ");
strcat(fname, dumpdir);
system(fname);
/* write the config file */
strcpy(fname, dumpdir);
strcat(fname, "/config.cfg");
if ((fcfg = fopen(fname, "w+")) == NULL)
return -1;
fprintf(fcfg, "# this configiration file was generated automatically\n");
fprintf(fcfg, "# please modify it according to the rules :-)\n#\n");
fprintf(fcfg, "# the source file contained:\n");
fprintf(fcfg, "# %d families,\n", hdr.num_families);
fprintf(fcfg, "# %d devices and\n", hdr.num_devices);
fprintf(fcfg, "# %d scripts.\n\n\n", hdr.num_scripts);
fprintf(fcfg, "# for the device file header\n");
fprintf(fcfg, "ver_major = %d\n", hdr.version[0]);
fprintf(fcfg, "ver_minor = %d\n", hdr.version[1]);
fprintf(fcfg, "ver_dot = %d\n", hdr.version[2]);
fprintf(fcfg, "compat = %d\n", hdr.compat);
fprintf(fcfg, "unused1a = %d\n", hdr.unused1a);
fprintf(fcfg, "unused1b = %d\n", hdr.unused1b);
fprintf(fcfg, "unused2 = %d\n", hdr.unused2);
fprintf(fcfg, "notes = \n\"%s\"\n\n\n", hdr.notes);
/* write families */
strcpy(fname, "mkdir ");
strcat(fname, dumpdir);
strcat(fname, "/families");
system(fname);
strcpy(fbase, dumpdir);
strcat(fbase, "/families/");
p = fbase + strlen(fbase);
fprintf(fcfg, "# list of device family files\n");
fprintf(fcfg, "families = {\n");
for (i = 0; i < hdr.num_families; i++) {
special_cat(p, families[i].name);
strcat(fbase, ".fam");
printf("filename : \"%s\"\n", fbase);
fprintf(fcfg, "\t\"%s\",\n", valid_string(fbase, g_tmp));
if ((f = fopen(fbase, "w+")) == NULL) {
printf("error: cannot create file\n");
return -1;
}
print_family(f, &families[i]);
fclose(f);
}
fprintf(fcfg, "}\n\n");
/* write devices */
strcpy(fname, "mkdir ");
strcat(fname, dumpdir);
strcat(fname, "/devices");
system(fname);
strcpy(fbase, dumpdir);
strcat(fbase, "/devices/");
p = fbase + strlen(fbase);
fprintf(fcfg, "# list of device files\n");
fprintf(fcfg, "devices = {\n");
for (i = 0; i < hdr.num_devices; i++) {
special_cat(p, devices[i].part_name);
strcat(fbase, ".dev");
printf("filename : \"%s\"\n", fbase);
fprintf(fcfg, "\t\"%s\",\n", valid_string(fbase, g_tmp));
if ((f = fopen(fbase, "w+")) == NULL) {
printf("error: cannot create file\n");
return -1;
}
print_device(f, &devices[i]);
fclose(f);
}
fprintf(fcfg, "}\n\n");
/* write scripts */
strcpy(fname, "mkdir ");
strcat(fname, dumpdir);
strcat(fname, "/scripts");
system(fname);
strcpy(fbase, dumpdir);
strcat(fbase, "/scripts/");
p = fbase + strlen(fbase);
fprintf(fcfg, "# list of script files\n");
fprintf(fcfg, "scripts = {\n");
for (i = 0; i < hdr.num_scripts; i++) {
special_cat(p, scripts[i].name);
strcat(fbase, ".scr");
printf("filename : \"%s\"\n", fbase);
fprintf(fcfg, "\t\"%s\",\n", valid_string(fbase, g_tmp));
if ((f = fopen(fbase, "w+")) == NULL) {
printf("error: cannot create file\n");
return -1;
}
print_script(f, &scripts[i]);
fclose(f);
}
fprintf(fcfg, "}");
fclose(fcfg);
return 0;
}
