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patty/bin/if.c
XANTRONIX Development 88743a5754 Decouple interface names from patty_ax25_if 
Changes:

    * Remove interface name argument from patty_ax25_if_new()

    * Add interface name argument to patty_ax25_server_if_add()

    * Add interface name argument to patty_daemon_if_add()

    * In src/server.c, implement 'struct if_entry' to hold the interface
      name, file descriptor, and pointer to a patty_ax25_if object, to
      recouple names to their respective interfaces

    * Add a return argument to patty_bin_if_create() to store a pointer
      to a new interface name created from a declaration
2024-03-01 00:20:47 -05:00

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#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <patty/bin/if.h>
struct context {
patty_error *err;
char *name;
patty_ax25_addr addr;
};
enum mode {
MODE_NONE,
MODE_IFNAME,
MODE_IFOPTS,
MODE_IFADDR,
MODE_KISS,
MODE_APRS_IS,
};
enum mode_kiss {
MODE_KISS_DEVICE,
MODE_KISS_IFOPTS,
MODE_KISS_BAUD,
MODE_KISS_FLOW,
};
enum mode_aprs_is {
MODE_APRS_IS_IFOPTS,
MODE_APRS_IS_HOST,
MODE_APRS_IS_PORT,
MODE_APRS_IS_USER,
MODE_APRS_IS_PASS,
MODE_APRS_IS_APPNAME,
MODE_APRS_IS_VERSION,
MODE_APRS_IS_FILTER,
};
static patty_ax25_if *create_kiss(struct context *ctx, int argc, char **argv) {
enum mode_kiss mode = MODE_KISS_DEVICE;
patty_kiss_tnc_info info;
int i;
memset(&info, '\0', sizeof(info));
if (argc == 0) {
patty_error_fmt(ctx->err, "Too few parameters for 'kiss' interface");
goto error_invalid;
}
for (i=0; i<argc; i++) {
switch (mode) {
case MODE_KISS_DEVICE:
info.flags |= PATTY_KISS_TNC_DEVICE;
info.device = argv[i];
mode = MODE_KISS_IFOPTS;
break;
case MODE_KISS_IFOPTS:
if (strcmp(argv[i], "baud") == 0) {
mode = MODE_KISS_BAUD;
} else if (strcmp(argv[i], "flow") == 0) {
mode = MODE_KISS_FLOW;
} else {
patty_error_fmt(ctx->err, "Invalid parameter '%s'",
argv[i]);
}
break;
case MODE_KISS_BAUD:
if (!(argv[i][0] >= '0' && argv[i][0] <= '9')) {
patty_error_fmt(ctx->err, "Invalid baud rate '%s'",
argv[i]);
goto error_invalid;
}
info.flags |= PATTY_KISS_TNC_BAUD;
info.baud = atoi(argv[i]);
mode = MODE_KISS_IFOPTS;
break;
case MODE_KISS_FLOW:
if (strcmp(argv[i], "crtscts") == 0) {
info.flags |= PATTY_KISS_TNC_FLOW;
info.flow = PATTY_KISS_TNC_FLOW_CRTSCTS;
} else if (strcmp(argv[i], "xonxoff") == 0) {
info.flags |= PATTY_KISS_TNC_FLOW;
info.flow = PATTY_KISS_TNC_FLOW_XONXOFF;
} else {
patty_error_fmt(ctx->err, "Invalid flow control '%s'",
argv[i]);
goto error_invalid;
}
mode = MODE_KISS_IFOPTS;
break;
default:
break;
}
}
return patty_ax25_if_new(&ctx->addr,
patty_kiss_tnc_driver(),
&info);
error_invalid:
return NULL;
}
static patty_ax25_if *create_aprs_is(struct context *ctx,
int argc,
char **argv) {
patty_ax25_if *iface;
patty_ax25_aprs_is_info info = {
.user = "N0CALL",
.pass = "-1",
.appname = PATTY_AX25_APRS_IS_DEFAULT_APPNAME,
.version = PATTY_AX25_APRS_IS_DEFAULT_VERSION,
.filter = "m/25"
};
enum mode_aprs_is mode = MODE_APRS_IS_IFOPTS;
int i;
if (argc == 0) {
patty_error_fmt(ctx->err, "Too few parameters for 'kiss' interface");
goto error_invalid;
}
for (i=0; i<argc; i++) {
switch (mode) {
case MODE_APRS_IS_IFOPTS:
if (strcmp(argv[i], "host") == 0) {
mode = MODE_APRS_IS_HOST;
} else if (strcmp(argv[i], "port") == 0) {
mode = MODE_APRS_IS_PORT;
} else if (strcmp(argv[i], "user") == 0) {
mode = MODE_APRS_IS_USER;
} else if (strcmp(argv[i], "pass") == 0) {
mode = MODE_APRS_IS_PASS;
} else if (strcmp(argv[i], "appname") == 0) {
mode = MODE_APRS_IS_APPNAME;
} else if (strcmp(argv[i], "version") == 0) {
mode = MODE_APRS_IS_VERSION;
} else if (strcmp(argv[i], "filter") == 0) {
mode = MODE_APRS_IS_FILTER;
} else {
patty_error_fmt(ctx->err, "Invalid parameter '%s'",
argv[i]);
}
break;
case MODE_APRS_IS_HOST:
info.host = argv[i];
mode = MODE_APRS_IS_IFOPTS;
break;
case MODE_APRS_IS_PORT:
info.port = argv[i];
mode = MODE_APRS_IS_IFOPTS;
break;
case MODE_APRS_IS_USER:
info.user = argv[i];
mode = MODE_APRS_IS_IFOPTS;
break;
case MODE_APRS_IS_PASS:
info.pass = argv[i];
mode = MODE_APRS_IS_IFOPTS;
break;
case MODE_APRS_IS_APPNAME:
info.appname = argv[i];
mode = MODE_APRS_IS_IFOPTS;
break;
case MODE_APRS_IS_VERSION:
info.version = argv[i];
mode = MODE_APRS_IS_IFOPTS;
break;
case MODE_APRS_IS_FILTER:
info.filter = argv[i];
mode = MODE_APRS_IS_IFOPTS;
break;
}
}
if ((iface = patty_ax25_if_new(&ctx->addr,
patty_ax25_aprs_is_driver(),
&info)) == NULL) {
patty_error_fmt(ctx->err, "Unable to connect to APRS-IS service %s:%s: %s",
info.host, info.port, strerror(errno));
goto error_if_new;
}
return iface;
error_if_new:
error_invalid:
return NULL;
}
struct if_type {
const char *name;
patty_ax25_if *(*func)(struct context *ctx, int argc, char **argv);
};
struct if_type if_types[] = {
{ "kiss", create_kiss },
{ "aprs-is", create_aprs_is },
{ NULL, NULL }
};
patty_ax25_if *patty_bin_if_create(int argc,
char **argv,
char **ifname,
patty_error *e) {
enum mode mode = MODE_NONE;
struct context ctx = {
.err = e,
.name = NULL
};
int i;
patty_error_clear(e);
memset(&ctx.addr, '\0', sizeof(ctx.addr));
for (i=0; i<argc; i++) {
switch (mode) {
case MODE_NONE:
if (strcmp(argv[i], "if") != 0) {
patty_error_fmt(e, "Unexpected start of expression '%s'",
argv[i]);
goto error_invalid;
} else {
mode = MODE_IFNAME;
}
break;
case MODE_IFNAME:
ctx.name = argv[i];
mode = MODE_IFOPTS;
break;
case MODE_IFOPTS:
if (strcmp(argv[i], "ax25") == 0) {
mode = MODE_IFADDR;
} else {
int t;
for (t=0; if_types[t].name; t++) {
if (strcmp(if_types[t].name, argv[i]) == 0) {
*ifname = ctx.name;
return if_types[t].func(&ctx,
argc - i - 1,
argv + i + 1);
}
}
patty_error_fmt(e, "Invalid parameter '%s'", argv[i]);
goto error_invalid;
}
break;
case MODE_IFADDR:
if (patty_ax25_pton(argv[i], &ctx.addr) < 0) {
patty_error_fmt(e, "Invalid AX.25 address '%s': %s",
argv[i], strerror(errno));
goto error_invalid;
}
mode = MODE_IFOPTS;
break;
default:
break;
}
}
patty_error_fmt(e, "Media type not provided");
error_invalid:
return NULL;
}
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